摘要
为了对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:随着滚压速度的增大,试样表面粗糙度先减小后增加,硬度和残余压应力变化不大,当滚压速度达到2 100mm/min时,表面粗糙度最低达到0.145 μm,硬度(HRC)为59.4,残余压应力为-415 MPa.随着滚压次数增多,工件表面粗糙度先减小后升高,硬度先升高后又减小,残余压应力变化不大,连续滚压9轮后,表面粗糙度最低达到0.152 µm,硬度(HRC)为58.9,残余压应力为-444.5 MPa.
Abstract
In order to achieve a better effect of light finishing and strengthening of laser cladding layer,ultrasonic rolling method is adopted to process the laser cladding layer and optimize its main processing parameters.The results show that:with the increase of rolling speed,the surface roughness of the specimen firstly decreases and then increases,the hardness and residual pressure do not change much,when the rolling speed reaches 2 100 mm/min,the surface roughness reaches 0.145 μm at the lowest level,the hardness is 59.4 HRC,and the residual pressure is-415 MPa.With the increase of the number of rolling times,the surface roughness of the workpiece firstly decreases and then increases,the hardness firstly increases and then decreases,and the hardness firstly increases and then increases,and the hardness firstly increases and then decreases,and the hardness firstly increases and then increases,and then increases,and then increases,and then increases,and then increases,and then increases,and then increases.With the increase of rolling times,the surface roughness of the workpiece decreases and then increases,the hardness firstly increases and then decreases,the residual pressure does not change,after 9 rounds of continuous rolling,the surface roughness reaches 0.152 μ m,the hardness is 58.9,and the residual pressure is 444.5 MPa.
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