45钢激光合金化Mo1B9Crx涂层的组织及性能

doi:10.13251/j.issn.0254-6051.2020.09.028

金属热处理 ›› 2020, Vol. 45 ›› Issue (9): 149-154.DOI: 10.13251/j.issn.0254-6051.2020.09.028

45钢激光合金化Mo₁B₉Cr_x涂层的组织及性能

刘德鑫^1,3, 张红星², 张蕾涛¹, 张伟樯³, 王雪松³, 戴娇燕³, 徐金富³

1.长安大学材料科学与工程学院,陕西西安 710061;
2.宁波工程学院电子与信息工程学院,浙江宁波 315000;
3.宁波工程学院材料与化学工程学院,浙江宁波 315000

收稿日期:2020-03-19 出版日期:2020-09-25 发布日期:2020-12-29
通讯作者: 徐金富,教授,博士,E-mail:xjf7413@sina.Com
作者简介:刘德鑫(1992—),男,硕士研究生,主要研究方向为激光合金化,E-mail:747399144@qq.com
基金资助:
奉化研究院科学基金(FHI-018106);海曙区高新技术产业专项(201803A006)

Microstructure and properties of laser alloyed Mo1 B,Cr,coating on 45 steel

Liu Dexin^1,3, Zhang Hongxing², Zhang Leitao¹, Zhang Weiqiang³, Wang Xuesong³, Dai Jiaoyan³, Xu Jinfu³

1. School of Materials Science and Engineering,Chang an University,Xi'an Shaanxi 710061,China;
2. School of Electronics and Information Engineering,Ningbo University of Technology,Ningbo Zhejiang 315000,China;
3. Schoo of Materials and Chemical Engineering,Ningbo University of Technology,Ningbo Zhejiang 315000,China

Received:2020-03-19 Online:2020-09-25 Published:2020-12-29

摘要/Abstract

摘要： 通过激光合金化技术在45钢基体上制备Mo₁B₉Cr_x合金化涂层,研究了Cr含量对涂层组织性能的影响。结果表明,Mo₁B₉Cr_1.1涂层最佳激光合金化工艺为激光功率3.3 kW,扫描速度900 mm/min,搭接率30%;在此工艺条件下,涂层与基体呈良好的冶金结合,无孔洞和裂纹,合金化区组织为Fe-Mo、Fe₂B、Fe-Cr、Cr₂B、Cr_xFe_y固溶体和化合物;随Cr含量从1.1%增加到23.3%,涂层硬度、摩擦因数、磨损率逐渐减小;当Cr含量为1.1%时,涂层硬度最大,为1005 HV0.1;当Cr含量为23.3%时,其耐磨性能最好,摩擦因数为0.475,磨损率为0.574×10^-14m³/(N·m),涂层磨损形式主要是磨粒磨损和粘着磨损结合的形式。

关键词: 激光合金化, Mo₁B₉Cr_x合金化涂层, Cr含量, 组织, 耐磨性

Abstract: Mo B,Cr,alloyed coating was prepared on the 45 steel substrate by laser alloying technology.The effect of Cr content on the microstructure and properties of the coating was studied.The results show that the best laser alloying process parameters for Mo,B.Cr.coating are laser power of 3.3 kW,scanning speed of 900 mm/min,overlap rate of 30%.By adopting this process,the coating shows a good metallurgical bonding with the substrate without voids and cracks,the alloying zone is composed of Fe-Mo,Fe2B,Fe-Cr,Cr,B,Cr,Fe,solid solutions and compounds,and the coating hardness,friction coefficient,and wear rate gradually decrease when the Cr content increases from1.1% to 23.3%.When the Cr content is 1.1%,the maximum coating hardness is 1005 HV0.1.When the Cr content is 23.3%,the wear resistance is the best,the friction cofficient is 0.475,the wear rate is0.574 x10 *m2/(N·m),and the form of coating wear is mainly a combination of abrasive wear and adhesive wear.

Key words: laser alloying, Mo B,Cr, alloyed coating, Cr content, microstructure, wear resistance

中图分类号:

TH117.1

刘德鑫, 张红星, 张蕾涛, 张伟樯, 王雪松, 戴娇燕, 徐金富. 45钢激光合金化Mo₁B₉Cr_x涂层的组织及性能[J]. 金属热处理, 2020, 45(9): 149-154.

Liu Dexin, Zhang Hongxing, Zhang Leitao, Zhang Weiqiang, Wang Xuesong, Dai Jiaoyan, Xu Jinfu. Microstructure and properties of laser alloyed Mo1 B,Cr,coating on 45 steel[J]. Heat Treatment of Metals, 2020, 45(9): 149-154.

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45钢激光合金化Mo₁B₉Cr_x涂层的组织及性能

Microstructure and properties of laser alloyed Mo1 B,Cr,coating on 45 steel

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