扫描速率对激光重熔微弧氧化层组织性能影响研究  

Effect of Scanning Rate on Microstructure and Properties of Laser Remelted Micro-arc Oxide Layer

作　　者：赵文滔 王兆彬 龙霆 焦玉凤[1] 张云龙[1] 翟梓棫 ZHAO Wentao;WANG Zhaobin;LONG Ting;JIAO Yufeng;ZHANG Yunlong;ZHAI Ziyu(College of Materials Science and Engineering,Jiamusi University,Heilongjiang Jiamusi 154007;Zhejiang Jirun Meishan Auto Parts Co.,Ltd.,Zhejiang Ningbo 315800,China)

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007 [2]浙江吉润梅山汽车部件有限公司,浙江宁波315800

出　　处：《广州化工》2024年第21期26-28,共3页GuangZhou Chemical Industry

基　　金：省级大学生创新创业训练计划项目(S202410222130);黑龙江省教育厅基础科研业务费项目(2023-KYYWF-0558);佳木斯大学青年创新人才培养支持计划项目(JMSUQP2023015);佳木斯大学国家基金培育项目(JMSUGPZR2023-008)。

摘　　要：为了提高汽车车身用铝合金的表面力学性能,设计了复合工艺的加工处理,通过微弧氧化(MAO)和激光重熔(LR)技术对6061铝合金表面进行复合处理。通过调节激光扫描速度,制备具有良好力学性能的6061合金表面陶瓷(α-Al_(2)O_(3))层。研究结果表明,经LR、MAO复合处理后,致密层主要为比较稳定的α-Al_(2)O_(3)相,疏松层为亚稳态的Mg_(3)Al_(2)(SiO_(4))_(3)和Mg_(2)Si相构成,复合处理有效改善了材料组织结构。此次使用MAO与LR复合工艺制备的表面陶瓷层显微硬度显著提高,平均硬度最高可达220 HV,陶瓷层结合强度随扫描速度增加先上升后降低并且材料表面亲水性降低。In order to improve the surface mechanical properties of aluminum alloy for automobile body,a composite process was designed.The surface of aluminum alloy 6061 aluminium alloy was treated by micro-arc oxidation(MAO) and laser remelting(LR).α-Al_(2)O_(3) layer on 6061 alloy with good mechanical properties was prepared by adjusting the laser scanning speed.The results showed that the compacted layer was mainly composed of α-Al_(2)O_(3),and the loose layer was composed of metastable Mg_(3)Al_(2)(SiO_(4))_(3) and Mg_(2)Si phases after LR-MAO composite treatment.The microhardness of the surface ceramic layer prepared by the composite process of Mao and LR was significantly increased,and the average hardness was up to 220 HV,the bonding strength of the ceramic layer increased first and then decreased with the increase of scanning velocity,and the surface hydrophilicity of the material decreased.

关 键 词：6061铝合金 微弧氧化 激光重熔 表面性能 扫描速率 

分 类 号：TG174.4[金属学及工艺—金属表面处理]