<*n class="15" style="background:#FFFFFF;font-family:"";">3C*<*n style="color:#333333;font-family:宋体;font-size:21pt;font-weight:bold;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">3C*<*n>不锈钢管<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">钢标准：<*n>GB/T1220-1992,<*n>属马氏体类型不锈钢，该钢机械加工性能好，经热处理（淬火回火）后，具有优良的耐腐蚀性能抛光性能较高的强度和*性，适宜制造承受高负荷，高*及在腐蚀介质作用下的塑料模具。调质处理后硬度在<*n>HRC30<*n>以下的<*n>3C*<*n>材料加工性较好，易达到较好的表面质量。而硬度大于<*n>HRC30<*n>时加工出的零件，表面质量虽然较好，但刀具易磨损。所以，在材料进厂后，****行调质处理硬度达到<*n>HRC25<*n>～<*n>30<*n>，然后再进行切削加工。<*n style="color:#000000;font-family:宋体;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">外文名<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">3C* <*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">旧标准<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">GB/T 1220-1992 3C* <*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">新标准<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">GB/T 1220-2007 30C* <*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">对应日本牌号<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Calibri;font-size:10.5pt;">SUS420J2 <*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:宋体;font-size:15.5pt;font-weight:bold;">3C*摘要<*n style="color:#000000;font-family:Arial;font-size:9pt;font-weight:bold;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">比<*n>2C*<*n>淬火后的硬度高，作刃具、喷嘴、阀座、阀门等。<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">3C*<*n>密度为<*n>7.75g/cm3<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">对应美国牌号：<*n>420S45<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">对应法国牌号：<*n>Z30C13<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:宋体;font-size:15.5pt;font-weight:bold;">3C*化学成分<*n style="color:#000000;font-family:Arial;font-size:10.5pt;font-weight:bold;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">碳 <*n>C <*n>：<*n>0.26<*n>～<*n>0.35<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">硅 <*n>Si<*n>：<*n>≤1.00<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">锰 <*n>Mn<*n>：<*n>≤1.00<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">硫 <*n>S <*n>：<*n>≤0.030<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">磷 <*n>P <*n>：<*n>≤0.035<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">铬 <*n>Cr<*n>：<*n>12.00<*n>～<*n>14.00<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">镍 <*n>Ni<*n>：允许含有<*n>≤0.60%<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:宋体;font-size:15.5pt;font-weight:bold;">3C*力学性能<*n style="color:#000000;font-family:Arial;font-size:9pt;font-weight:bold;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">力学性能：<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">*拉强度 <*n>σb (MPa)<*n>：淬火回火<*n>,≥735<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">条件屈服强度 <*n>σ0.2 (MPa)<*n>：淬火回火<*n>,≥540<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">伸长率 <*n>δ5 (%)<*n>：淬火回火<*n>,≥12<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">断面收缩率 <*n>ψ (%)<*n>：淬火回火<*n>,≥40<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">冲击功 <*n>Akv (J)<*n>：淬火回火<*n>,≥24<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">硬度 ：退火<*n>,≤235HB;<*n>淬火回火<*n>,≥217HB<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:宋体;font-size:15.5pt;font-weight:bold;">3C*热处理工艺<*n style="color:#000000;font-family:Arial;font-size:9pt;font-weight:bold;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">热处理规范：<*n>1)<*n>退火<*n>,800<*n>～<*n>900℃<*n>缓冷或约<*n>750℃<*n>快冷<*n>;2)<*n>淬火<*n>,920<*n>～<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">980℃<*n>油冷<*n>;3)<*n>回火<*n>,600<*n>～<*n>750℃<*n>快冷。<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">金相*：*特征为马氏体型。<*n style="color:#000000;font-family:Arial;font-size:10.5pt;">

<*n style="background:#FFFFFF;color:#000000;font-family:Arial;font-size:10.5pt;">交货状态：一般以热处理状态交货，其热处理种类在合同中注明；未注明者，按不热处理状态交货。<*n style="color:#000000;font-family:Calibri;font-size:10.5pt;">