摘要
目的提高高反射率材料铝合金对激光的吸收率。方法基于热平衡原理,搭建了一种激光吸收率测试试验台,并对1.2 mm厚2A12硬铝合金试样表面采用了无光漆、炭素墨汁、普通墨汁、石墨等4种不同的表面涂层处理方法,用CO_2脉冲激光发射器进行了定点照射测试,通过K型热电偶测得铝合金试样的温度变化,间接获得了其吸收率的大小。结果试验数据表明,在一定工艺参数下,随着激光功率或扫描时间的增加,所有试样的表面温度整体均呈上升趋势。在四种不同的表面处理方法中,无光漆处理后的铝合金试样吸收率最高,吸收率比原始表面提高了40%,并将这一结论用于工程实践加工,加工后的试样切割面光滑,刮渣尺寸小,表面质量高。结论该吸收率测试装置及表面处理方法,可成功地改善材料对激光的吸收率。
The work aims to improve the absorptivity of the high reflectivity material aluminum alloy by laser cutting. Based on the principle of thermal equilibrium, a test stand for laser absorptivity was set up. Such four different coating treatment methods as lusterless paint, carbolic ink, common ink and graphite were applied on the surface of 1.2 mm thick 2A12 aluminum alloy samples. CO_2 pulse laser emitter was used for the test of fixed point irradiation. The temperature change of aluminum alloy samples was measured with K-type thermocouple, based on which the amount of its absorptivity was indirectly obtained. Test data showed that under certain technological parameters, with the increase of laser power or scanning time, the surface temperature of all samples was integrally increased. Among the four different surface treatment methods, the absorptivity of the aluminum alloy treated with lusterless paint was the highest, which was increased by 40% compared with the original surface. After this conclusion was applied to engineering practice, the test-piece cutting surface was smooth after machining. The slag size was small and the surface quality was high. In conclusion, this absorptivity tester and surface treatment method can successfully im-prove the absorptivity of the material to the laser.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2016年第10期193-198,共6页
Surface Technology
基金
2014年度陕西省科技厅科研计划基金项目(2014JM7268)
2014年陕西省教育厅科学研究计划项目(14JK1147)
2015陕西理工学院研究生基金项目(SLGYCX1532)~~
