热处理、热加工工艺表格

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1、表6-1常用低合金结构钢的牌号、化学成分、性能及用途化学成分/%厚度或力学性能钢号直径σsAKV/J旧钢号应用举例CMnSiVNbTi其他σb/MPaδ5/%/mm/MPa(20℃)Q295≤0.160.80≤0.550.020.0150.02~0.20<16≥295390~570233409MnV桥梁，车辆，容器，~1.50~0.15~0.06016~35≥27509MnNb油罐35~50≥25509Mn212MnQ3450.181.00≤0.550.020.0150.02~0.20<16≥345470~63021~223412Mn

2、V桥梁，车辆，船舶，~0.20~1.60~0.15~0.06016~35≥32514MnNb压力容器，建筑结构35~50≥29516Mn18Nb16MnREQ390≤0.201.00≤0.550.020.0150.02~0.20wCr≤0.30<16≥390490~65019~203415MnV桥梁，船舶起重设备，~1.60~0.20~0.060wNi≤0.7016~35≥37015MnTi压力容器35~50≥35016MnNbQ420≤0.201.00≤0.550.020.0150.02~0.20wCr≤0.40<16≥420520

3、~68018~193415MnVN桥梁，高压容器~1.70~0.20~0.060wNi≤0.7016~35≥40014MnVTiRE大型船舶，电站设，35~50≥380管道Q460≤0.201.00≤0.550.200.0150.02~0.20wCr≤0.70<16≥460550~7201734中温高压容器(<120)℃，~1.70~0.20~0.060wNi≤0.7016~35≥440锅炉，化工、石油高35~50≥420压厚壁容器(<100℃)表6-2常用渗碳钢的牌号、成分、热处理、性能及用途主要化学成分/%热处理/℃力学性能(不小

4、于)类毛坯尺钢号预备回σb/σs/应用举例别wCwMnwSiwCrwNiwV其他渗碳淬火δ/%ψ/%AKu/J寸/mm处理火MPaMPa0.12~0.35~0.17~880~770159302005003001555＜30活塞销等0.180.650.37900空~800水低0.17~1.40~0.17~850~小齿轮，小轴，20Mn2930880油20078559010404715淬0.241.800.37870活塞销等透0.17~0.50~0.20~0.70~880780~82齿轮、小轴、活20Cr93020083554010404

5、715性0.240.800.401.00水，油0水，油塞销等同上，也用作锅0.17~1.30~0.17~0.07~88020MnV93020078559010405515炉、高压容器管0.241.600.370.12水，油道等中0.17~0.90~0.17~0.90~齿轮、轴、蜗杆、20CrMn930850油20093073510454715淬0.231.200.371.20活塞销、摩擦轮透性0.17~0.80~0.17~1.00~wTi汽车、拖拉机上20CrMnTi930880油870油2001080850104555150.231

6、.100.371.300.04~0.10的变速箱齿轮高18Cr2Ni4-0.13~0.30~0.17~1.35~4.00~wW大型渗碳齿轮930950空850空200118083510457815淬WA0.190.600.371.654.500.80~1.20和轴类件透0.17~0.30~0.17~1.25~3.25~20Cr2Ni4930880油780油2001180108010456315同上性0.230.600.371.653.65表6-3常用调质钢的牌号、成分、热处理、性能及用途主要化学成分/%热处理力学性能(不小于)退火毛坯

7、类状态应用举例σb/σs/δ5/ψ钢号wCwMnwSiwCrwNiwMowV其他淬火/℃回火/℃尺寸AKu/J别MPaMPa%%HB/mm0.37~1.10~0.17~wB0.0005500水，主轴、曲轴、齿轮、柱塞40MnB850油259807851045472070.441.400.37~0.0035油等低淬可代替40Cr及部分代替0.37~1.10~0.17~0.05~wB0.0005520水，透40MnVB850油2598078510454720740CrNi做重要零件，也可0.441.400.370.10~0.0035油性代

8、替38CrSi做重要销钉钢做重要调质件如轴类件、0.37~0.50~0.17~0.80~0.07~0520水，40Cr850油2598078594547207连杆螺栓、进气阀和重要0.440.800.371.10.12油