摘要
为了对铁基激光熔覆层实现更优光整强化效果,采用超声滚压方法处理EA4T铁基激光熔覆层并对其主加工参数优化进行分析。研究结果表明:提高压下量后,激光熔覆层表面粗糙度增大;提高静压力后,熔覆层表面硬度先提高再降低;提高滚压速率后,试样表面粗糙度呈现先降低再增大变化;增加滚压次数后,获得的熔覆层表面硬度呈现先增大再降低的变化。确定最优参数工艺:在滚压压下量为0.10 mm、滚压速率为2100 mm/min、静压力介于0.45~0.65 MPa、滚压3次条件下,采用超声滚压方法处理激光熔覆层能够实现优异表面光整效果。超声滚压后激光熔覆层表层部位存在明显塑性变形层,激光熔覆层塑性变形程度随深度增加而降低,晶粒尺寸则增大。文章研究结果为激光熔覆热作车轴钢提供超声滚压工艺优化的理论参考,并为实际应用过程提供理论指导,此外也可以促进模具制造技术和修复能力的提升。
In order to achieve better finishing and strengthening effect on laser cladding layer of axle steel,ultrasonic rolling method was used to treat laser cladding layer of EA4T axle steel and its main machining parameters optimization was analyzed.The results show that the surface roughness of laser cladding increases with the increase of the reduction amount.With the increase of static pressure,the surface hardness of cladding layer firstly increases and then decreases.When the rolling rate is increased,the surface roughness of the sample decreases first and then increases.With the increase of rolling times,the surface hardness of the cladding layer increases first and then decreases.The optimal parameters were determined as follows:under the conditions of rolling down 0.10 mm,rolling rate 2100 mm/min,static pressure between 0.45~0.65 MPa and rolling three times,the ultrasonic rolling method could achieve excellent surface finishing effect.There are obvious plastic deformation layers on the surface of laser cladding layer after ultrasonic rolling.The plastic deformation degree of laser cladding layer decreases with increasing depth,while the grain size increases.According to the research results of this paper,it can provide a theoretical reference for the optimization of ultrasonic rolling process of laser cladding hot working axle steel,and provide theoretical guidance for the practical application process.In addition,it can also promote the improvement of die manufacturing technology and repair ability.
作者
周平
王峰
ZHOU Ping;WANG Feng(School of Intelligent Engineering,Chongqing Yitong University,Chongqing 401520,CHN;School of Mechanical Engineering,Chongqing University of Technology,Chongqing 401520,CHN)
出处
《制造技术与机床》
北大核心
2023年第10期22-27,共6页
Manufacturing Technology & Machine Tool
关键词
超声滚压
激光熔覆
车轴钢
参数优化
ultrasonic rolling
laser cladding
axle steel
parameter optimization
