稀土Ce对激光熔覆高硼贝氏体涂层性能的影响

doi:10.13251/j.issn.0254-6051.2021.01.025

金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 133-137.DOI: 10.13251/j.issn.0254-6051.2021.01.025

稀土Ce对激光熔覆高硼贝氏体涂层性能的影响

张坚¹, 黄道思¹, 赵龙志¹, 焦海涛¹, 唐延川¹, 刘德佳¹, 赵明娟¹, 李劲²

1.华东交通大学材料科学与工程学院,江西南昌 330013;
2.南昌铁路局通达工贸有限责任公司,江西南昌 330013

收稿日期:2020-06-07 出版日期:2021-01-25 发布日期:2021-01-26
通讯作者: 赵龙志,教授,博士,E-mail:zhaolongzhi@163.com
作者简介:张坚(1961—),男,教授,博士,主要研究方向为材料表面工程和金属基复合材料,E-mail:zhangj@ecjtu.edu.cn。
基金资助:
国家自然科学基金(51761012,51965022);江西省科技厅科技项目(20153BCB23005,20192BAB206028);华东交通大学科研启动基金(2003419036)

Effect of rare earth Ce on properties of high-boron bainite coating prepared by laser cladding

Zhang Jian¹, Huang Daosi¹, Zhao Longzhi¹, Jiao Haitao¹, Tang Yanchuan¹, Liu Dejia¹, Zhao Mingjuan¹, Li Jin²

1. School of Materials Science and Engineering,East China Jiaotong University,Nanchang Jiangxi 330013,China;
2. Tongda Industry and Trade Co.,Ltd.,Nanchang Railway Administration,Nanchang Jiangxi 330013,China

Received:2020-06-07 Online:2021-01-25 Published:2021-01-26

摘要/Abstract

摘要： 利用激光熔覆制备了不同Ce含量的高硼贝氏体涂层。采用扫描电镜对不同Ce含量的涂层组织进行表征;利用显微硬度计检测熔覆层显微硬度;通过万能拉伸机测试熔覆涂层的断裂韧性;用往复摩擦磨损试验机测试涂层的磨损性能。结果表明:经稀土Ce改性后,初生奥氏体晶粒尺寸减小,晶间网格状硼化物形态得到改善,呈现断网或颗粒状。三点弯曲断裂韧性得到改善,断口由沿晶脆断转变为准解理断裂。随着Ce含量的增加,熔覆涂层平均摩擦因数先减小后增大,磨痕中都存在严重的疲劳剥落。

关键词: 激光熔覆, 高硼贝氏体涂层, 稀土Ce, 组织, 性能

Abstract: High boron bainite coatings with different Ce contents were prepared by laser cladding,then the microstructure,microhardness,fracture toughness,wear performance of the costings were studied by using SEM,microhardness tester,universal tensile machine,reciprocating friction and wear tester,respectively.The results show that the grain size of primary austenite decreases,and the morphology of intergranular trellis boride is improved after Ce modification.The three-point bending fracture toughness is improved,and the fracture changes from intergranular brittle fracture to quasi-cleavage fracture.With the increase of Ce content,the average friction coefficient of the coatings decreases first and then increases,and serious fatigue peeling occurs in all the wear marks.

Key words: laser cladding, high-boron bainite coating, rare earth Ce, microstructure, properties

中图分类号:

TG142.7

张坚, 黄道思, 赵龙志, 焦海涛, 唐延川, 刘德佳, 赵明娟, 李劲. 稀土Ce对激光熔覆高硼贝氏体涂层性能的影响[J]. 金属热处理, 2021, 46(1): 133-137.

Zhang Jian, Huang Daosi, Zhao Longzhi, Jiao Haitao, Tang Yanchuan, Liu Dejia, Zhao Mingjuan, Li Jin. Effect of rare earth Ce on properties of high-boron bainite coating prepared by laser cladding[J]. Heat Treatment of Metals, 2021, 46(1): 133-137.

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稀土Ce对激光熔覆高硼贝氏体涂层性能的影响

Effect of rare earth Ce on properties of high-boron bainite coating prepared by laser cladding

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