回火温度对锯片用复合钢板组织性能的影响

doi:10.13251/j.issn.0254-6051.2020.02.042

金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 214-217.DOI: 10.13251/j.issn.0254-6051.2020.02.042

回火温度对锯片用复合钢板组织性能的影响

杨跃辉¹, 苑少强¹, 郭继富², 韩会杰², 张艳龙²

1. 唐山学院机电工程系, 河北唐山 063000;
2. 唐山冶金锯片有限公司, 河北唐山 063000

收稿日期:2019-09-20 出版日期:2020-02-25 发布日期:2020-04-03
作者简介:杨跃辉(1980—),男,副教授,主要从事金属强韧化机制及组织调控技术研究,E-mail:hbyangyuehui@163.com。
基金资助:
唐山市冶金锯片技术创新团队建设项目(18130245a);河北省钢铁联合研究基金(E2019105101);唐山市科技计划(18130218a)

Effect of tempering temperature on microstructure and properties of composite steel plate for saw blade

Yang Yuehui¹, Yuan Shaoqiang¹, Guo Jifu², Han Huijie², Zhang Yanlong²

1. Department of Electromechanical Engineering, Tangshan College, Tangshan Hebei 063000, China;
2. Tangshan Metallurgical Saw Blade Co., Ltd., Tangshan Hebei 063000, China

Received:2019-09-20 Online:2020-02-25 Published:2020-04-03

摘要/Abstract

摘要：

对45Mn2V/Q345复合锯片用钢进行了系列温度的回火处理,测定了试验钢的强度与伸长率,并观察了其显微组织,分析了回火温度对复合钢板组织及拉伸性能的影响。结果表明:45Mn2V覆层淬火后得到针状马氏体,Q345钢基板形成板条马氏体。回火温度在400 ℃以下时,45Mn2V钢组织中析出的碳化物细小且弥散,超过400 ℃后则明显粗化,达到480 ℃时粗大的碳化物大量析出,导致试验钢的强度先随回火温度的升高而降低,但在480 ℃时有明显的增加。基板组织在回火过程中则主要发生马氏体板条的合并粗化,达到480 ℃后开始出现等轴的再结晶晶粒,但这一变化未能改善复合钢板的塑性。

关键词: 锯片用钢, 复合钢板, 回火处理, 组织性能

Abstract:

The composite steel plate for saw blade rolled by 45Mn2V/Q345 steel was tempered. The strength and elongation of the specimens tempered at different temperatures were measured, and the microstructures were observed, then the effect of tempering temperature on the microstructure and tensile properties of tested steel was analyzed. The results show that acicular martensite is obtained after quenching for 45Mn2V steel acting as clad layer and lath martensite is formed on Q345 steel used as substrate. Tempered at a temperature below 400 ℃, the carbides precipitated in 45Mn2V are fine and uniform and coarsened obviously after tempering at a higher temperature, then large amount of coarsening carbides can be observed when tempered at 480 ℃, which results in the strength of tested steel decreasing with the increase of tempering temperature, but increasing obviously at 480 ℃. On the other hand, the coarsening of martensite lath occurs mainly in the substrate steel, and the equiaxed recrystallized grains appear after tempered at 480 ℃. However, the change can not improve the plasticity of clad steel plate.

Key words: steel for saw blade, clad steel plate, tempering treatment, microstructure and properties

中图分类号:

TG156.5

杨跃辉, 苑少强, 郭继富, 韩会杰, 张艳龙. 回火温度对锯片用复合钢板组织性能的影响[J]. 金属热处理, 2020, 45(2): 214-217.

Yang Yuehui, Yuan Shaoqiang, Guo Jifu, Han Huijie, Zhang Yanlong. Effect of tempering temperature on microstructure and properties of composite steel plate for saw blade[J]. HTM, 2020, 45(2): 214-217.

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回火温度对锯片用复合钢板组织性能的影响

Effect of tempering temperature on microstructure and properties of composite steel plate for saw blade

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