摘要
采用高功率CO2 激光器对汽车变速箱用双联齿轮进行焊接实验 ;分析了几个主要的工艺参数对焊接的影响 ;并对激光功率 3kW、焊接速度 1.5m/min、离焦量 - 0 .5mm时的焊接产品进行了分析检验。结果得到外观饱满、美观、无焊珠和凹陷且深宽比大于 2∶1的焊缝 ;焊接热影响过渡区很小 ,熔区很快过渡到基体 ,熔区组织致密、无缺陷 ,呈细板条马氏体 ,而且熔区显微硬度达到 4 5 0HV ,较基体有显著的提高 ;通过力学性能测试发现 ,热变形在允许的 0 .0 5mm范围内 ,在 15kNm的作用下进行扭矩试验未发现开裂和变形超差现象。选择合理的焊接工艺参数 。
The double-linked gears in automobile gear-box have been welded with high power CO 2 laser;several primary parameters affected welding quality have been analyzed;the welded products were analyzed and tested.The appearance of welding seam was perfect without hollow and welding bead.The ratio between depth and width exceeded 2∶1;the hot influenced zone is narrow,the molten zone is compact without bug and the micro-hard reaches 450HV which is higher than raw materials. The gears didn’t craze by 15kNm tortile test.
出处
《激光技术》
CAS
CSCD
北大核心
2004年第4期445-448,共4页
Laser Technology
关键词
激光焊接
双联齿轮
工艺参数
结果检验
laser welding
double-gear
technics parameter
result-checkup