<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">   1<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">．弹簧钢性能要求①高的弹性****限σ<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">e<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">和屈强比σ<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">s/<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">σ<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">b<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">，以保证优良的弹性性能，即吸收大量的弹性能而不产生塑性变形；②高的疲劳****限，疲劳是弹簧的****主要*形式之一，疲劳性能除与钢的成分结构有关以外，还主要地受钢的冶金质量（如非金属夹杂物）和弹簧表面质量（如脱碳）的影响；③足够的塑性和韧性，以****冲击断裂；④<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">其它<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">性能，如良好的热处理和塑性加工性能，特殊条件下工作的耐热性或耐蚀性要求等。<*n class="apple-converted-*ce"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;"> <*n lang="EN-US" style="font-size:10.5pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;color:#2B2B2B;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">
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<*n style="background-position: initial initial; background-repeat: initial initial;">     2<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">．成分特点钢中碳与<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">合金<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">元素的含量及作用为：（<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">1<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）中、高碳一般地，碳素弹簧钢<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">wc<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">＝<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">0.6<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">％<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">~0.9<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">％，合金弹簧钢<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">wc<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">＝<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">0.45<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">％<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">~0.70<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">％，经淬火加中温回火后得到回火托氏体*，能较好地保证弹簧的性能要求。（<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">2<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）合金元素普通用途的合金弹簧钢一般是低<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">合金钢<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">。主加元素为<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Si<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Cr<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">等，其主要作用是****淬透性、固溶强化基体并****回火稳定性；辅加元素为<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Mo<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">W<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">V<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">等强碳化物形成元素，主要作用有****<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Si<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">引起的脱碳缺陷、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">引起的过热缺陷并****回火稳定性及耐热性等。<*n class="apple-converted-*ce"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;"> <*n lang="EN-US" style="font-size:10.5pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;color:#2B2B2B;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">
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<*n style="background-position: initial initial; background-repeat: initial initial;">     3<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">．常用弹簧钢表<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">12-10<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">为我国常用弹簧钢的牌号、性能特点和主要用途，其成分、热处理工艺和力学性能可参照有关*标准（如<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">GB1222<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">－<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">1984<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）。表<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">12-10<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">常用主要弹簧钢的牌号性能特点与用途种类钢号性能特点产要用途碳素弹簧钢普通<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">量<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">65<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">硬度、强度、屈强比高，但淬透性差，耐热性不好，承受动载和疲劳载荷的能力低价格低廉，多应用于工作温度不高的小型弹簧<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;"><value="12" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on">12mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">或不重要的较大弹簧<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">7085<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">较高<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">量<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">65Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">淬透性、综合力学性能优于碳钢，但对过热比较敏感价格较低，用量很大，制造各种小截面<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;"><value="15" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on">15mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">的扁簧、发条、<*n lang="EN-US" style="font-size: 10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN; mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">减震<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">器与<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">离合器<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">*，刹车轴等合金弹簧钢<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Si-Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">系<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">55Si2Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">强度高、弹性好，*回火稳定性佳；但易脱碳和<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">石墨<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">化。含<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">B<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">钢淬透性明显****主要的弹簧钢类，用途很广，可制造各种中等截面<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;"><value="25" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on">25mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">的重要弹簧，如汽车、<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">拖拉机<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">板簧、螺旋弹簧等<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">60Si2Mn55Si2MnB55SiMnVBCr<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">系<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">50CrVA<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">淬透性优良、回火稳定性高、脱碳与石墨化倾向低；综合力学性能佳，有一定的耐蚀性，含<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">V<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Mo<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">W<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">等元素的弹簧具有一定的耐高温性；由于均为*****钢，故疲劳性能进一步****用于制造载荷大的重型大型尺寸（<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">50~value="60" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on">60mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）的重要弹簧，如发动机<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">阀门<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">弹簧、<*n lang="EN-US" style="font-size:10.5pt; mso-bidi-font-size:12.0pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN; mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">*碎机<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">弹簧；耐热弹簧，如<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">锅炉<*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">安全阀<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">弹簧、喷油嘴弹簧、<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">气缸<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">胀圈等<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">60CrMnA60CrMnBA60CrMnMoA60Si2CrA60Si2CrVA1<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）碳素弹簧钢（即非合金弹簧钢）其价格便宜但淬透性较差，适合于截面尺寸较小的非重要弹簧，其中以<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">65<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">、<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">65Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">****常用。<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">2<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）合金弹簧钢根据主加合金元素种类不同可分为两大类：<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Si-Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">系弹簧钢和<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">Cr<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">系弹簧钢。前者淬透性较碳钢*格不很昂贵，故应用****广，主要用于截面尺寸不大于value="25" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">25mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">的各类弹簧，<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">60Si2Mn<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">是其典型代表；后者的淬透性较好，综合力学性能高，弹簧表面不易脱碳，但价格相对较高，一般用于截面尺寸较大的重要弹簧，<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">50CrVA<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">是其典型代表。<*n class="apple-converted-*ce"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;"> <*n lang="EN-US" style="font-size:10.5pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;color:#2B2B2B;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">
<*n style="background-position: initial initial; background-repeat: initial initial;">     4<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">．热处理特点弹簧钢的热处理取决于弹簧的加工成形方法，一般可分为热成形弹簧和冷成形弹簧两大类：<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">1<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）热成形弹簧对截面尺寸＞value="10" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">10mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">各种大型和形状复杂的弹簧均采用热成形（如热轧、热卷），如汽车、拖拉机、火车的板簧和螺旋弹簧。其简明加工路线为：<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">扁钢<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">或<*n lang="EN-US" style="font-size:10.5pt; mso-bidi-font-size:12.0pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN; mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">圆钢<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">下料→加热压弯或卷绕→淬火中温回火→表面喷丸处理，使用状态*为回火托氏体。喷丸可强化表面并****弹簧表面质量，显著****疲劳性能。<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">2<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）冷成形弹簧截面尺寸＜value="10" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">10mm<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">的各种小型弹簧可采用冷成形（如冷卷、冷轧），如<*n lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><*n lang="EN-US" style="font-family: 宋体; color: black; background-position: initial initial; background-repeat: initial initial;"><*n lang="EN-US">仪表<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">中的螺旋弹簧、发条及弹*等。这类弹簧在成形前****行冷拉（冷轧）、淬火中温回火或铅浴等温淬火后冷拉（轧）强化；然后再进行冷成形加工，此过程中将进一步强化金属，但也产生了较大的内应力和脆性，故在其后应进行低温去应力退火（一般<*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">200<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">～value="400" has*ce="False" negative="False" numbertype="1" tcsc="0" w:st="on"><*n lang="EN-US" style="font-size: 10.5pt; font-family: 'Times New Roman'; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">400<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">℃<*n style="font-size: 10.5pt; font-family: 宋体; color: rgb(43, 43, 43); background-position: initial initial; background-repeat: initial initial;">）。<*n lang="EN-US" style="font-size:10.5pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;color:#2B2B2B;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">