摘要
在三种不同焊接速度下,研究了40CrNiMo钢和93W4.9Ni2.1Fe钨合金激光焊接性能的差异。首先,通过对焊接件进行显微硬度测试,评价了其焊接工艺性能。然后,分析了激光焊接速度对焊缝区全貌、钢与焊缝熔合区微观形貌以及焊缝区钨颗粒的影响。结果表明:随着焊接速度的提高,由钢侧热影响区到远离热影响区的母材硬度开始急剧下降;钢侧热影响区中的母材硬度依然较高,但是熔合区和焊缝中的硬度却发生连续降低。此外,焊接速度较慢时,钢与焊缝熔合性能较好,焊缝中钨颗粒与基体的分离程度也较小。
Under three different welding speeds, the differences of laser welding performance between 40CrNiMo steel and 93W4.9Ni2.1Fe tungsten alloy were investigated. In first, the micro-hardness test was carried out on welding object, and the welding process performance was evaluated. Then, the influences of laser welding speeds on the weld area panorama, the microstmcture of steel and weld fusion zone and the tungsten particles in the weld zone were analyzed. The experimental results show that： with the increase of welding speed, the hardness of the base metal from steel heat affected zone to no-heat affected zone begins to drop dramatically; the hardness of the base metal in steel heat affected zone is still high, however that in fusion zone and weld line is continuously reduced. In addition, when the welding speed is slower, the fusion performance of steel and weld line is better, moreover, the separation degree of tungsten particles in weld line from the main body is smaller.
出处
《热加工工艺》
CSCD
北大核心
2015年第1期184-186,共3页
Hot Working Technology
