激光全熔透工艺参数对不锈钢焊接气孔率的影响  

Effects of laser full penetration welding parameters on porosity rate of stainless steel

作　　者：王诗洋[1] 王旭友[1] 滕彬[1] 黄瑞生[1] 王猛[1] 

机构地区：[1]机械科学研究院哈尔滨焊接研究所,150028

出　　处：《焊接》2015年第6期30-34,74,共5页Welding & Joining

基　　金：04专项"大幅三维空间曲面高功率高精度激光焊接技术与装备"基金资助项目(201318101)

摘　　要：以304不锈钢为研究对象,分析了焊接工艺参数对304不锈钢气孔产生的影响规律。结果表明:与激光非熔透焊缝相比,全熔透型焊缝更有利于抑制焊接气孔的产生。通过调整激光功率与焊接速度来提高焊缝背宽比可以抑制焊缝中的气孔。在激光功率为3 000 W、离焦量在-4-+4范围内,焊接速度低于0.4 m/min时,气孔率可控制在0.1%以内。气孔的产生与焊缝背宽比有关,当背宽比大于0.95时可以消除焊缝气孔。304 stainless steel was welded by laser full penetration welding.The effect of welding parameters on porosity rate of stainless steel was studied.The result showed that laser full penetration weld is good at the reeducation of porosity in the weld compared with partial penetration weld.The porosity can be inhibited by adjusting the welding parameters to improve the back width- to- top width ratio.When the laser power is 3 kW,defocusing distance is in-4 ~ +4 and welding speed is lower than 0.4 m/min,porosity can be controlled within 0.1%

关 键 词：全熔透 304不锈钢 背宽比 

分 类 号：TG456.7[金属学及工艺—焊接]