在相变仪上对20CrNi2Mo 钢进行热模拟压缩试验，研究了其在840℃时不同变形量(0~50％)下的热压缩变形行为，并分析了它的显微组织和硬度。结果表明：20CrNi2Mo 钢流变应力曲线呈现出明显的动态再结晶特征；当变形量达到10％时，会发生动态再结晶；随着变形量增加，晶粒逐渐细化，之后尺寸基本保持稳定，当变形量达到50％时，进入完全再结晶状态；随着变形量逐渐增大，马氏体板条束逐渐细化，残余奥氏体含量降低；当变形量由10％增至20％时，硬度显著增大，而后趋于稳定。
Thermal simulation compression experiment was carried out on 20CrNi2Mo steel by using phase change instrument,and the steel′s thermal compressive deformation behavior at 840 ℃ under different deformations (0-50%)was studied.The steel′s microstructure and hardness were also analyzed.The results show that the flow stress curve of 20CrNi2Mo steel exhibits obvious dynamic recrystallization characteristics.When the deformation amount reaches 10%, the dynamic recrystallization occurs.With the increase of the thermal compression deformation,the grain size is refined and subsequently can almost be kept stable.When the deformation amount reaches 50%,the specimen is completely recrystallized.In addition,with the increase of the thermal compression deformation,martensite is refined gradually,the content of residual austenite decreases.When the compression deformation changes from 10% to 20%,the hardness increases significantly,and then tends to stabilization.
参考文献
| [1] | 张进所;康韶光;翁永清;薛维华;赵越超.20CrNi2Mo钢重载齿轮应用研究[J].金属热处理,2008(7):32-36. |
| [2] | 马修泉;薛维华.20CrNi2Mo钢作为重载齿轮材料的热处理工艺性能分析[J].煤矿机械,2008(2):80-81. |
| [3] | 高金柱;顾敏;王爱香;许鸿翔;赵少甫.常用典型齿轮钢渗碳层的组织与性能[J].机械工程材料,2012(02):49-51. |
| [4] | 黄睿;魏昂;李柏;艾鑫;鲁宁斌;刘永明.热处理工艺对20CrNi2Mo合金钢组织和力学性能的影响[J].热加工工艺,2014(2):176-178. |
| [5] | 王之香.Nb对重载齿轮用20CrNi2Mo钢组织和力学性能的影响[J].金属热处理,2013(06):46-48. |
| [6] | 曹宇;邸洪双;张洁岑;张敬奇;马天军.800H合金动态再结晶行为研究[J].金属学报,2012(10):1175-1185. |
| [7] | 刘宗昌;计云萍;段宝玉;任慧平.板条状马氏体的亚结构及形成机制[J].材料热处理学报,2011(3):56-61. |
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