Effect of laser power on microstructure and properties of clad layer on 27SiMn steel

doi:10.13251/j.issn.0254-6051.2022.05.032

Abstract

Abstract: In order to explore the influence of laser power on microstructure and properties of the clad layer, four different laser powers were designed to perform Fe-Cr-Ni clad layer preparation on the surface of 27SiMn steel. The microstructure, hardness, wear loss, and friction coefficient of the clad layers were studied by means of super depth of field microscope, microhardness tester and friction and wear tester. The results show that the clad layer of the specimens under four different laser powers has no defect such as pore and crack, and the dendrite growth directions of the specimen prepared under the laser power of 1800 W are relatively consistent. The cellular crystal and the secondary dendrite in the middle part of the clad layer prepared under the laser power of 2400 W are smaller and denser. As the laser power increases, the melting width, melting depth and dilution rate of the clad layer gradually increase, while the melting height first increases and then decreases. The laser power has little effect on hardness of the clad layer, but the increase of laser power can raise the hardness of the heat affected zone. The specimen prepared under the laser power of 2400 W has the minimum average friction coefficient, the least wear loss, the minimum wear depth, and its wear resistance is excellent.

Key words: laser cladding, laser power, 27SiMn steel, Fe-Cr-Ni coating, friction and wear

CLC Number:

TN249

Shi Shuting, Shu Linsen, He Yajuan, Wang Jiasheng. Effect of laser power on microstructure and properties of clad layer on 27SiMn steel[J]. Heat Treatment of Metals, 2022, 47(5): 194-198.

References

[1]王晶晨, 贾国平, 白冰, 等. 液压支架零部件防腐及再制造工艺研究进展[J]. 材料导报, 2015, 29(21): 112-117.
Wang Jingchen, Jia Guoping, Bai Bing, et al. Research progress on antisepsis and remanufacturing process of hydraulic support components[J]. Materials Review, 2015, 29(21): 112-117.
[2]韩文静, 张培训, 汤其建, 等. 单体液压支柱缸体激光熔覆Ni60A+20%WC性能[J]. 煤炭学报, 2012, 37(2): 340-343.
Han Wenjing, Zhang Peixun, Tang Qijian, et al. Property of laser cladded Ni60A+20%WC alloy of cylinder of single hydraulic support[J]. Journal of China Coal Society, 2012, 37(2): 340-343.
[3]郭永明. 表面工程应用实例[例53]电弧喷涂在煤矿液压支架立柱修复中的应用[J]. 中国表面工程, 2018, 31(2): 2.
Guo Yongming. Examples of surface engineering applications[Example 53] application of arc spraying in the repair of hydraulic support columns in coal mines[J]. China Surface Engineering, 2018, 31(2): 2.
[4]李成, 王玉玲, 姜芙林, 等. 激光功率对超声辅助激光熔覆Al₂O₃-ZrO₂陶瓷力学性能的影响[J]. 金属热处理, 2020, 45(2): 223-229.
Li Cheng, Wang Yuling, Jiang Fulin, et al. Effect of laser power on mechanical properties of ultrasonic assisted laser clad Al₂O₃-ZrO₂ ceramic[J]. Heat Treatment of Metals, 2020, 45(2): 223-229.
[5]孙帅, 李崇桂, 李帅, 等. WC含量对激光熔覆Al₂O₃/TiO₂涂层组织与性能的影响[J]. 金属热处理, 2018, 43(12): 78-82.
Sun Shuai, Li Chonggui, Li Shuai, et al. Effect of WC content on microstructure and properties of laser clad Al₂O₃/TiO₂ coating[J]. Heat Treatment of Metals, 2018, 43(12): 78-82.
[6]王贤才, 张亚普, 柴蓉霞. 27SiMn钢表面激光熔覆304不锈钢的组织和性能[J]. 金属热处理, 2020, 45(4): 188-193.
Wang Xiancai, Zhang Yapu, Chai Rongxia. Microstructure and properties of 304 stainless steel laser cladding on 27SiMn steel surface[J]. Heat Treatment of Metals, 2020, 45(4): 188-193.
[7]郭卫, 李凯凯, 柴蓉霞, 等. 27SiMn钢表面激光熔覆铁基合金组织和耐磨性分析[J]. 应用激光, 2018, 38(3): 351-357.
Guo Wei, Li Kaikai, Chai Rongxia, et al. Analysis of microstructure and wear resistance of Fe-based alloy on 27SiMn steel surface by laser cladding[J]. Applied Laser, 2018, 38(3): 351-357.
[8]黎文强. 液压支架激光熔覆强化层的组织与性能[J]. 金属热处理, 2019, 44(5): 83-86.
Li Wenqiang. Microstructure and properties of laser cladding reinforced layer of hydraulic support[J]. Heat Treatment of Metals, 2019, 44(5): 83-86.
[9]Shen F M, Tao W, Li L Q, et al. Effect of microstructure on the corrosion resistance of coatings by extreme high speed laser cladding[J]. Applied Surface Science, 2020, 517: 146085.
[10]Zhang L, Wang C S, Han L Y, et al. Influence of laser power on microstructure and properties of laser clad Co-based amorphous composite coatings[J]. Surfaces and Interfaces, 2017, 6: 18-23.
[11]Li Y X, Su K Q, Bai P K, et al. Microstructure and property characterization of Ti/TiBCN reinforced Ti based composite coatings fabricated by laser cladding with different scanning speed[J]. Materials Characterization, 2020, 159: 110023.
[12]程秀全, 晏畅, 程思竹, 等. 工艺参数对激光冲击诱导表面残余应力洞的影响规律[J]. 机械工程材料, 2019, 43(11): 53-56, 61.
Cheng Xiuquan, Yan Chang, Cheng Sizhu, et al. Influence rule of process parameters on residual stress cave induced by laser shock[J]. Materials for Mechanical Engineering, 2019, 43(11): 53-56, 61.
[13]李广琪, 朱刚贤, 赵亮, 等. 离焦量对中空环形激光熔覆层温度场及应力场的影响[J]. 中国机械工程, 2021, 32(5): 587-593, 599.
Li Guangqi, Zhu Gangxian, Zhao Liang, et al. Influence of defocusing amount on temperature and stress field of hollow-ring laser cladding layer[J]. China Mechanical Engineering, 2021, 32(5): 587-593, 599.
[14]邱莹, 张凤英, 胡腾腾, 等. 激光功率对TC4表面熔覆Ti40阻燃钛合金组织及硬度的影响[J]. 中国激光, 2019, 46(11): 167-175.
Qiu Ying, Zhang Fengying, Hu Tengteng, et al. Effect of laser power on microstructure and hardness of Ti40 flame-retardant titanium alloy deposited by laser cladding on TC4 surface[J]. Chinese Journal of Lasers, 2019, 46(11): 167-175.
[15]Wang C L, Gao Y, Zeng Z C, et al. Effect of rare-earth on friction and wear properties of laser cladding Ni-based coatings on 6063Al[J]. Journal of Alloys and Compounds, 2017, 727: 278-285.