锻压技术

轧辊激光熔覆再制造工艺参数优化

英文标题：Optimization on process parameters of laser cladding remanufacturing for roller

作者：赵建峰张小萍

分类号：TG174

出版年,卷(期):页码：2019,44(8):80-85

摘要：

为了延长轧机轧辊的使用寿命，以激光熔覆功率、扫描速度以及送粉速度作为优化工艺参数，以互熔稀释率、硬度和磨损率作为评价指标，运用灰色关联分析法对轧辊激光熔覆再制造修复工艺参数进行优化研究。采用L9(33)的正交表进行正交试验，对熔覆层质量进行检测，基于灰色关联度分析，得到针对激光熔覆层质量，最优的激光熔覆工艺参数：扫描速度为100 mm·s-1、送粉速度为42 g·min-1、激光熔覆功率为1.7 kW。工艺参数优化前后的激光熔覆层的互熔稀释率、硬度和磨损率评价指标对比表明，优化后的工艺参数，使得熔覆层稀释率降低了10.07%，硬度提高了13.45%，磨损率降低了38.46%。

In order to prolong the service life of roller in rolling mills, taking the laser cladding power, scanning speed and powder feeding speed as the optimization parameters and the interfusion dilution rate, hardness and wear rate as the evaluation indexes, the process parameters of laser cladding and remanufacturing repair of roller were optimized by the grey relational analysis method. Then, the quality of cladding layer was tested by the orthogonal test with L9(33) orthogonal table, and the optimum process parameters of laser cladding with scanning speed of 100 mm s-1, powder feeding speed of 42 g·min-1 and laser cladding power of 1.7 kW were obtained by the grey relational analysis aimed to the quality of laser cladding layer. By comparing with the interfusion dilution rate, hardness and wear rate of laser cladding layer before and after optimization of process parameters, the results show that the dilution rate of laser cladding layer is reduced by 10.07%, the hardness is increased by 13.45%, and the wear rate is reduced by 38.46%.

基金项目：

江苏省职业教育教学改革研究课题(ZYB100)

作者简介：赵建峰（1973-），男，学士，高级讲师 E-mail：jsrdzjf@163.com

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