摘要
采用波长为1064 nm的脉冲光纤激光器对FV520B合金钢表面的高温氧化色层进行清洗,以激光功率、脉冲频率、清洗次数和基体原始粗糙度作为变量,考察各参数对试样表面氧化色清除效果及清洗后表面粗糙度的影响规律。研究结果表明:对于200#砂纸打磨的预处理样品(粗糙度约为0.503μm),当清洗激光功率为40~120 W时,清洗后试样表面粗糙度无明显变化,当激光功率为120~200 W时,随着激光功率的增大,粗糙度逐渐减小;在激光功率为120 W、脉冲频率为20 kHz的条件下,对200#砂纸打磨的预处理样品(粗糙度约为0.503μm)进行多次清洗,当清洗次数达到2时,粗糙度显著降低(粗糙度降低40.8%),继续增大清洗次数,粗糙度降低效果不明显,确定最佳清洗参数为激光功率120 W、脉冲频率20 kHz、清洗次数2。此外,当清洗参数一定时,随着预处理试样初始粗糙度的减小,氧化色层的去除率下降,且清洗后粗糙度的降低效果不明显。
The pulsed 1064 nm fiber laser is used to clean the thermal oxide layer of FV520B steel.The effects of processing parameters including laser power,pulse frequency,cleaning times,and substrate roughness,on the cleaning effectiveness of thermal oxide layer and the surface roughness after cleaning are investigated.The results show that for the pretreated samples(the roughness is approximately 0.503μm)by polishing with 200#abrasive paper,the surface roughness remains almost unchanged after cleaning in the laser power range of 40-120 W,while the roughness decreases with increasing power in the range of 120-200 W.When the above pretreated samples are cleaned under laser power of 120 W and pulse frequency of 20 kHz,the surface roughness presents an obvious decrease(dropped by nearly 40.8%)after laser cleaning for two times,and the roughness does not basically decrease with the increase of cleaning times.In addition,under the same laser cleaning parameters,the cleaning effectiveness of oxide layer becomes lower and the roughness does not exhibit any obvious change with the decrease in roughness of pretreated samples.
作者
邓德伟
范清华
赵祥路
马玉山
黄治冶
孙奇
杨树华
张勇
Deng Dewei;Fan Qinghua;Zhao Xianglu;Ma Yushan;Huang Zhiye;Sun Qi;Yang Shuhua;Zhang Yong(Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Shenyang Blower Works Group Corporation,Shenyang,Liaoning 110869,China;Wuzhong Instrument Co.,Ltd.,Wuzhong,Ningxia 751100,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第21期163-172,共10页
Laser & Optoelectronics Progress
基金
辽宁重大装备制造协同创新中心基金(DUT2017031)
高端控制阀产业技术协同创新中心基金(2018WZ003)。
