光纤激光送丝熔覆修复工艺研究

采用光纤激光器在不锈钢表面进行侧向送丝熔覆修复实验，系统地研究了激光工艺参数对熔覆道形貌影响并确定合适的多道搭接率取值范围，为多道多层送丝激光熔覆修复技术应用提供指导。结果表明：影响熔覆道宏观成形和形貌参数的激光工艺参数主要有激光功率、扫描速度和送丝速度，离焦量的影响相对较小，当激光能量密度为100 J/mm2，熔丝率为39.44×10-6 g/J时，可得到稳定平滑的熔覆道；合适的搭接率变化范围为45%~53%，此时多道单层熔覆层表面平整度在100 μm以下。

Abstract

Fiber laser cladding repairing is performed on the surface of stainless steel with wire feeding. The effects of laser process parameters on the cladding track geometry are studied. In order to apply on multi-track and multi-layer cladding repairing practice, the best range of overlapping rate is also investigated. The results show that the laser cladding track geometry is mainly attributed to laser power, scanning speed and wire feeding speed, while defocusing distance has relatively small effect on the formation and geometry of cladding track. When the laser energy density is 100 J/mm2 and the wire fusion rate is 39.44×10-6 g/J, the stable and smooth cladding track is obtained. When the overlapping rate varies from 45 % to 53 %, the values of multi-track single-layer cladding surface smoothness are 100 μm or less.

参考文献

[1] 徐庆东, 林鑫, 宋梦华, 等. 激光成形修复2Cr13不锈钢热影响区的组织研究[J]. 金属学报, 2013, 49(5): 605-613.

Xu Qingdong, Lin Xin, Song Menghua, et al.. Microstructure of heat-affected zone of laser forming repaired 2Cr13 stainless steel[J]. Acta Metall Sinica, 2013; 49(5): 605-613.

[2] B Graf, A Gumenyuk, M Rethmeier. Laser metal deposition as repair technology for stainless steel and titanium alloys[J]. Physics Procedia, 2012, 39: 376-381.

[3] B Bax, M Schfer, C Pauly, et al.. Coating and prototyping of single-phase iron aluminide by laser cladding[J]. Surf Coat Technol, 2013, 235: 773-777.

[4] 石世宏, 傅戈雁, 李龙, 等. 中空激光光内同轴送丝熔覆工艺的实现及其试验研究[J]. 中国激光, 2010, 37(1): 266-270.

Shi Shihong, Fu Geyan, Li Long, et al.. Realization and research of laser cladding with method of internal wire feeding through a hollow laser beam[J]. Chinese J Lasers, 2010, 37(1): 266-270.

[5] T E Abioye, J Folkes, A T Clare. A parametric study of inconel 625 wire laser deposition[J]. J Mater Process Technol, 2013, 213(12): 2145-2151.

[6] F Lusquios, R Comesaa, A. Riveiro, et al.. Fibre laser micro-cladding of Co-based alloys on stainless steel[J]. Surf Coat Technol, 2009, 203(14): 1933-1940.

[7] J del Val, R Comesaa, F. Lusquios, et al.. Laser cladding of Co-based superalloy coatings: Comparative study between NdYAG laser and fibre laser[J]. Surf Coat Technol, 2010, 204(12-13): 1957-1961.

[8] R Cottam, M Brandt. Laser cladding of Ti-6Al-4V powder on Ti-6Al-4V substrate: effect of laser cladding parameters on microstructure[J]. Physics Procedia, 2011, 12: 323-329.

[9] R Unnikrishnan, K S N Satish Idury, T P Ismail, et al.. Effect of heat input on the microstructure, residual stresses and corrosion resistance of 304L austenitic stainless steel weldments[J]. Mater Charact, 2014, 93: 10-23.

[10] 朱刚贤, 张安峰, 李涤尘. 激光熔覆工艺参数对熔覆层表面平整度的影响[J]. 中国激光, 2010, 37(1): 296-301.

Zhu Gangxian, Zhang Anfeng, Li Dichen. Effect of process parameters on surface smoothness in laser cladding[J]. Chinese J Lasers, 2010, 37(1): 296-301.

[11] 鲁青龙, 王彦芳, 栗荔, 等. 扫描速度对激光熔覆铁基非晶复合涂层组织与性能的影响[J]. 中国激光, 2013, 40(2): 0203007.

Lu Qinglong, Wang Yanfang, Li Li, et al.. Effects of scanning speed on microstructures and properties of laser cladding Fe-based amorphous composite coatings[J]. Chinese J Lasers, 2013, 40(2): 0203007.

李凯斌, 李东, 刘东宇, 裴广玉. 光纤激光送丝熔覆修复工艺研究[J]. 中国激光, 2014, 41(11): 1103006. Li Kaibin, Li Dong, Liu Dongyu, Pei Guangyu. Research of Fiber Laser Cladding Repairing Process with Wire Feeding[J]. Chinese Journal of Lasers, 2014, 41(11): 1103006.

光纤激光送丝熔覆修复工艺研究

关于本站 Cookie 的使用提示

全站搜索

光纤激光送丝熔覆修复工艺研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索