Microstructure and properties of multi-track joint Co-based alloy laser clad layer

doi:10.13251/j.issn.0254-6051.2020.03.009

Abstract

Abstract:

Co-based alloy powder was used as a cladding material to prepare high performance cladding layer on the surface of 42CrMo substrate by using laser cladding technology. The macromorphology and microstructure of the clad layer were observed by an optical microscope. The microhardness and friction coefficient curves of the substrate and clad layer were measured by microhardness tester, friction and wear tester, and the wear mechanism was analyzed. The results show that the microstructure types of the clad layer are planar, cellular and columnar grains, and distributed as gradient morphology. The average hardness of the clad layer reaches 650 HV0.3, which is 2.7 times the average hardness of the substrate. The friction coefficient of the clad layer is about 0.275, about 0.075 smaller than that of the substrate.

Key words: laser clad layer, Co-based alloy, microstructure, micro-hardness, wear performance

CLC Number:

TG174.4

Cui Lujun, Yu Jihua, Cao Yanlong, Zeng Wenhan, Guo Shirui, Li Xiaolei, Zheng Bo. Microstructure and properties of multi-track joint Co-based alloy laser clad layer[J]. HTM, 2020, 45(3): 41-45.

References

[1]姚树玉, 李惠琪. 采煤机堆焊涂层截齿热处理工艺研究[J]. 金属热处理, 2004, 29(9): 40-43.
Yao Shuyu, Li Huiqi. Study on heat treatment process of shearer surfacing coating pick[J]. Heat Treatment of Metals, 2004, 29(9): 40-43.
[2]李晓豁, 槐金文, 姜健. 截齿损耗及其影响因素的分析[J]. 黑龙江科技学院学报, 2002, 12(1): 1-7.
Li Xiaohuo, Huai Jinwen, Jiang Jian. Analysis of pick loss and its influencing factors[J]. Journal of Heilongjiang Institute of Science and Technology, 2002, 12(1): 1-7.
[3]宋建丽, 李永堂, 邓琦林, 等. 激光熔覆成型技术的研究进展[J]. 机械工程学报, 2010, 46(14): 29-39.
Song Jianli, Li Yongtang, Deng Qilin, et al. Research progress of laser cladding molding technology[J]. Journal of Mechanical Engineering, 2010, 46(14): 29-39.
[4]普诺威. 激光制造工艺: 基础、展望和创新应用实例[M]. 刘冬云, 译. 北京: 清华大学出版社, 2008.
[5]Rafal J, Carmen N, Ana C, et al. Properties of laser-cladded satellite coatings prepared on preheated chromium steel[J]. Materials and Design, 2008, 29(1): 187-192.
[6]杨尚磊, 尤加强, 张冬梅, 等. Ni基合金基体激光熔覆Co基合金涂层的微观组织与性能[J]. 金属热处理, 2016, 41(3): 130-133.
Yang Shanglei, You Qiang, Zhang Dongmei, et al. Microstructure and properties of laser cladding Co-based alloy coating on Ni-based alloy matrix[J]. Heat Treatment of Metals, 2016, 41(3): 130-133.
[7]Shishkovsky I, Smurov I. Titanium base functional graded coating via 3D laser cladding[J]. Materials Letters, 2012, 73: 32-35.
[8]王喜, 王爱华, 吴旭浩, 等. 半导体激光熔覆钴基合金的耐磨性[J]. 金属热处理, 2016, 41(3): 126-130.
Wang Xi, Wang Aihua, Wu Xuhao, et al. Wear resistance of cobalt-based alloy by semiconductor laser cladding[J]. Heat Treatment of Metals, 2016, 41(3): 126-130.
[9]杨晓红, 杭文先, 秦绍刚, 等. H13钢激光熔覆钴基复合涂层的组织及耐磨性[J]. 吉林大学学报, 2017, 47(3): 891-899.
Yang Xiaohong, Hang Wenxian, Qin Shaogang, et al. Microstructure and wear resistance of laser cladding cobalt-based composite coating on H13 steel[J]. Journal of Jilin University, 2017, 47(3): 891-899.
[10]童文辉, 赵子龙, 王杰, 等. 球墨铸铁表面激光熔覆钴基合金涂层的组织与性能[J]. 稀有金属, 2017, 41(12): 1386-1390.
Tong Wenhui, Zhao Zilong, Wang Jie, et al. Microstructure and properties of laser cladding cobalt base alloy coating on ductile iron[J]. Rare Metals, 2017, 41 (12): 1386-1390.
[11]李闯, 刘洪喜, 张晓伟, 等. 40Cr刀具钢表面激光熔覆钴基碳化物复合涂层的组织与性能[J]. 中国激光, 2015, 42(11): 53-58.
Li Chuang, Liu Hongxi, Zhang Xiaowei, et al. Microstructure and properties of laser cladding cobalt-based carbide composite coating on 40Cr tool steel[J]. China Laser, 2015, 42(11): 53-58.
[12]刘莎莎, 王宇航, 张维平. TA15表面激光熔覆钴基复合涂层显微组织和耐磨性研究[J]. 稀有金属材料与工程, 2014, 43(5): 1041-1046.
Liu Shasha, Wang Yuhang, Zhang Weiping. Study on microstructure and wear resistance of laser cladding cobalt-based composite coating on TA15 surface[J]. Rare Metal Materials and Engineering, 2014, 43(5): 1041-1046.
[13]Zhou S F, Zeng X Y, Hu Q W, et al. Analysis of crack behavior for Ni-based WC composite coatings by laser cladding and crack-free realization[J]. Applied Surface Science, 2008, 255(5): 1646-1653.
[14]Kurz W, Fisher D J. 凝固原理[M]. 李建国, 胡侨丹, 译. 北京: 高等教育出版社, 2010.
[15]何波, 楚莎莎, 张洪宇, 等. 钴基高温合金的激光成型性能研究[J]. 稀有金属, 2017, 41(4): 350-355.
He Bo, Chu Shasha, Zhang Hongyu, et al. Study on laser forming properties of cobalt-based superalloy[J]. Rare Metals, 2017, 41(4): 350-355.
[16]张洪宇, 何波, 楚莎莎, 等. 钴基高温合金的激光成型工艺研究[J]. 热加工工艺, 2017, 46(14): 40-44.
Zhang Hongyu, He Bo, Chu Shasha, et al. Study on laser forming process of cobalt based superalloy[J]. Hot Working Technology, 2017, 46(14): 40-44.
[17]薛春芳, 田欣利, 卢芳, 等. 激光近成形钴基高温合金研究[J]. 金属热处理, 2004, 29(12): 1-3.
Xu Chunfang, Tian Xinli, Lu Fang, et al. Study on Co-base super-alloy by laser engineered net shaping[J]. Heat Treatment of Metals, 2004, 29(12): 1-3.
[18]宋衎, 喻凯, 林鑫, 等. 热处理态激光立体成形Inconel 718高温合金的组织及力学性能[J]. 金属学报, 2015, 51(8): 935-942.
Song Kan, Yu Kai, Lin Xin, et al. Microstructure and mechanical properties of heat treatment laser solid forming superalloy Inconel 718[J]. Acta Metallurgica Sinica, 2015, 51(8): 935-942.