激光熔覆铁基合金梯度涂层的组织性能及应用

doi:10.11896/cldb.18090204

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (3690KB)
Export: BibTeX | EndNote (RIS)

Abstract Roller shaft is an important part of high speed wire mill, and the shaft journal is easy to wear. In order to extend the service life of the roller shaft, the worn shaft journal can be remanufactured by laser cladding. However, the hardness of the roller shaft is high. And there will be large number of cracks when laser cladding high hardness powder. But gradient cladding can be used to solve this problem. Previous researches of gradient cladding mainly focus on theory and technology, but few works touch the practical repairing.
In this paper, Fe1 alloy powder and Fe5 alloy powder were coated on the surface of 45^# steel by 4 kW fiber laser. The former was transition la-yer, and the latter was strengthened layer. The defects on the surface of the coating were detected by penetrant inspection. Furthermore, the microstructure and element content of the coating were analyzed by means of OM, SEM and EDS. And the phase composition of each layer was investigated by XRD. Meanwhile, the microhardness of the coating was measured by microhardness tester. The results showed that the sample presented good surface morphologies. No macroscopic cracks formed on its surface. And the coating was compact and free of defects. Moreover, metallurgical combinations were achieved between the layers. And the grains at the junction of the transition layer and the strengthened layer were refined. In general, the upper grains are smaller than the lower ones. XRD analysis showed that the transition layer was mainly composed of austenite and the reinforcement layer was made up of austenite and martensite. The hardness of the cladding layer presented a typical gradient distribution. And the average hardness of the strengthened layer was 566.12HV_0.2, which met the hardness requirement of the mill roll shaft. Furthermore, the average hardness of the transition layer was 385.98HV_0.2, which played a good role in buffering. The relationship between the speed of mechanical arm and the rotating speed of journal during laser cladding were deduced. Meanwhile, a good repair effect has been achieved.

Key words： laser cladding Fe-based alloy gradient coating microstructure and property phase composition mill roll shaft

Published: 16 September 2019

CLC number:

TG174.4

Fund:This work was financially supported by the High Technology Research and Development Project of Xinjiang Uygur Autonomous Region (201513102).

About author:: Pengfei Fanis a graduate student of 2016 from Xinjiang University. He specializes in laser cladding remanufacturing and surface modification of materials.
Kedian Wangis a doctor and professor at Xi’an Jiaotong University. He is mainly engaged in laser precision processing, electromechanical control and other aspects of research.

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	FAN Pengfei
	SUN Wenlei
	ZHANG Guan
	WANG Kedian

Cite this article:

FAN Pengfei,SUN Wenlei,ZHANG Guan, et al. Microstructure, Properties and Applications of Laser Cladding Fe-based Alloy Gradient Coatings[J]. Materials Reports, 2019, 33(22): 3806-3810.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.18090204 OR http://www.mater-rep.com/EN/Y2019/V33/I22/3806

[1]	Wang X Y, Zhou S F, Dai X Q, et al. International Journal of Refractory Metals and Hard Materials, 2017, 64, 234.
[2]	Bartkowski D, Mynarczak A, Piasecki A, et al. Optics & Laser Techno-logy, 2015, 68, 191.
[3]	Ye S Y, Liu J Y, Yang W. Surface Technology, 2018, 47(3), 48 (in Chinese).叶四友, 刘建永, 杨伟. 表面技术, 2018,47(3), 48.
[4]	Yang J X, Zhang J Q, Chang W Q, et al. Journal of Materials Enginee-ring, 2016, 44(6), 110(in Chinese).杨胶溪, 张健全, 常万庆, 等. 材料工程, 2016, 44(6), 110.
[5]	Ren W B, Dong S Y, Xu B S, et al. Transactions of the China Welding Institution, 2018, 39(3), 11(in Chinese).任维彬, 董世运, 徐滨士, 等. 焊接学报, 2018, 39(3), 11.
[6]	Li L Q, Yao C W, Huang J, et al. Chinese Journal of Lasers, 2017, 44(3), 136(in Chinese).李林起, 姚成武, 黄坚, 等. 中国激光, 2017, 44(3), 136.
[7]	Bian H Y, Zhao X P, Qu S, et al. Chinese Journal of Lasers, 2016, 43(7), 98(in Chinese).卞宏友, 赵翔鹏, 曲伸, 等. 中国激光, 2016, 43(7), 98.
[8]	Zhang D Q,Kao X J. Hot Working Technology, 2017, 46(2), 151(in Chinese).张德强, 考锡俊. 热加工工艺, 2017, 46(2), 151.
[9]	Fang L Y, Yao Y S, Yan H, et al. Chinese Journal of Lasers, 2017, 44(8), 96(in Chinese).房刘杨, 姚延松, 闫华, 等. 中国激光, 2017, 44(8), 96.
[10]	Bobbio L D, Otis R A, Borgonia J P, et al. Acta Materialia, 2017, 127, 133.
[11]	Shah K, Hag I, Khan A, et al. Materials & Design, 2014, 54, 531.
[12]	Dong S Y, Ma Y Z, Xu B S, et al. Materials Review, 2006, 20(6), 5(in Chinese).董世运, 马运哲, 徐滨士, 等. 材料导报, 2006, 20(6), 5.
[13]	Liu H X, Dong T, Zhang X W, et al. Chinese Journal of Lasers, 2017, 44(8), 104(in Chinese).刘洪喜, 董涛, 张晓伟, 等. 中国激光, 2017, 44(8), 104.
[14]	Gong Y B, Wang S L, Huang Y, et al. Chinese Journal of Rare Metals, 2017, 41(10), 1117(in Chinese).龚玉兵, 王善林, 黄勇, 等. 稀有金属, 2017, 41(10), 1117.
[15]	Zhang S, Wu C L, Zhang C H, et al. Optics & Laser Technology, 2016, 84, 23.
[16]	Liu H X, Leng N, Zhang X W, et al. Infrared and Laser Engineering, 2016, 45(1), 190(in Chinese).刘洪喜, 冷凝, 张晓伟, 等. 红外与激光工程, 2016, 45(1), 190.