热处理工艺对高碳铬轴承钢组织和性能的影响

发布时间：2018-03-28 03:05

本文选题：高碳铬轴承钢　切入点：热处理工艺　出处：《材料热处理学报》2015年07期

【摘要】：研究了不同热处理工艺(淬回火、贝氏体等温淬火、马氏体预淬火后贝氏体淬火和贝氏体变温淬火处理)对典型高碳铬轴承钢GCr15的组织以及硬度、抗拉强度、冲击功和耐磨性等力学性能的影响,对比分析了不同热处理工艺的微观组织和性能的关系;为了更好地分析下贝氏体短时处理和尺寸稳定性,采用膨胀法进行了试验研究;利用XRD分析,研究了不同热处理工艺后残留奥氏体的量。研究表明,与常规淬回火相比,得到贝氏体组织的处理过程可以得到组织和性能的最佳匹配;贝氏体处理后,试样综合性能优于淬回火处理且尺寸稳定性好;马氏体预淬火处理和贝氏体变温处理在提高钢综合性能的同时又能不同程度缩短贝氏体转变时间。
[Abstract]:The microstructure, hardness and tensile strength of typical high carbon chromium bearing steel (GCr15) treated by different heat treatment (quenching and tempering, isothermal quenching of bainite, martensite prequenching and quenching of bainite at variable temperature) were studied. The relationship between microstructure and properties of different heat treatment processes was analyzed by comparing the effects of impact work and wear resistance on mechanical properties, in order to better analyze the short-time treatment and dimensional stability of bainite, the expansion method was used to study the relationship between microstructure and properties. The amount of retained austenite after different heat treatment processes was studied by XRD analysis. The results show that the optimum matching of microstructure and properties can be obtained by the treatment process of bainite structure compared with that of conventional quenching and tempering, and after bainite treatment, The comprehensive properties of the samples are better than that of quenching and tempering and the size stability is good, and the martensite prequenching and bainite temperature-changing treatment can improve the comprehensive properties of the steel and shorten the bainite transformation time in varying degrees.
【作者单位】：北京科技大学冶金工程研究院;
【基金】：国家高技术研究发展计划“863”项目(2012AA03A508)
【分类号】：TG161

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