冷轧压下率对C-Cr-Mn-Si系低合金钢组织和性能的影响  

Effect of cold rolling reduction ratio on microstructure and properties of C-Cr-Mn-Si low-alloy steel

作　　者：何肖飞[1] 张伟锋 王毛球[1] 闫永明[1] HE Xiao-fei;ZHANG Wei-feng;WANG Mao-qiu;YAN Yong-ming(Institute of Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]钢铁研究总院有限公司特殊钢研究院,北京100081

出　　处：《材料热处理学报》2022年第10期151-159,共9页Transactions of Materials and Heat Treatment

摘　　要：为了研究冷轧压下率对C-Cr-Mn-Si低合金钢组织和性能的影响,对其进行了4种冷轧压下率(6%、16%、40%、52%)的冷轧试验。利用光学显微镜、拉伸试验、冲击试验和布氏硬度计等分析了试验钢的组织和性能。结果表明:随着冷轧压下率的增加,试验钢各向异性增加,黑色条带状渗碳体组织逐渐明显,同时在厚度方向上组织不断细化,这有利于试验钢拉伸强度的增加,但会影响其冲击性能。另外,冷轧处理使试验钢产生明显的加工硬化效果,显著提升了其表面硬度,并且随着冷轧压下率的增加,硬度整体呈现增加的趋势。In order to study the effect of cold rolling reduction ratio on microstructure and properties of C-Cr-Mn-Si low alloy steel,cold rolling tests of four cold rolling reduction ratio(6%,16%,40%,52%)were carried out.The microstructure and properties of the experimental steel were analyzed by means of optical microscope,tensile test,impact test and Brinell hardness tester.The results show that with the increase of cold rolling reduction ratio,the anisotropy of the experimental steel increases,the black strip cementite structure gradually becomes obvious,and the microstructure is continuously refined in the thickness direction,which is conducive to the increase of the tensile strength of the experimental steel,but affects its impact properties.In addition,the cold rolling treatment of the experimental steel produces obvious work hardening effect,and significantly improves its surface hardness.With the increase of cold rolling reduction ratio,the hardness shows an increasing trend as a whole.

关 键 词：低合金钢 冷轧压下率 组织 力学性能 加工硬化 

分 类 号：TG142.3[一般工业技术—材料科学与工程]