摘要
针对0.40 mm厚度0Cr17Ni4Cu4Nb与0.26 mm厚度3Cr19Ni9Mo2N不锈钢搭接接头开展激光焊接工艺试验,研究焊接接头组织及性能。焊接试件结构为搭接焊接3条纵向焊缝,采用HKQW-300激光焊接机在氩气保护氛围中焊接,对焊接接头的显微组织和测试力学性能进行分析。结果表明,当在激光功率为20W,离焦量为+8 mm,速度为180 mm/min并氩气保护的工艺参数下焊接时,0Cr17Ni4Cu4Nb与3Cr19Ni9Mo2N材料激光焊接搭接接头的焊缝中组织为铁素体魏氏组织,焊缝熔宽为335.3~404.0μm,热影响区(HAZ)较窄;焊接接头的拉断力优于5.493 9 kN,优于3Cr19Ni9Mo2N母材强化后拉断力的73.7%,达到产品焊接性能要求指标。焊接接头性能良好,焊缝无虚焊、焊透等现象,此工艺方法在某卫星的太阳翼压紧释放机构压紧带研制中推广应用。
A laser welding process test was conducted on the lap joint of 0.40mm 0Cr17Ni4Cu4Nb and 0.26mm 3Cr19Ni9Mo2N stainless steel to investigate the microstructure and properties of the welded joint.The structure of the welded specimen was composed of three longitudinal welds created through lap welding.The HKQW-300 laser welding machine was utilized to perform welding joints in an argon atmosphere.The microstructure and mechanical properties of the welded joints were analyzed through tests.The results indicate that,when welding under the process parameters of a laser power of 20W,a defocusing amount of+8mm,a speed of 180mm/min,and argon protection,the weld of the 0Cr17Ni4Cu4Nb and 3Cr19Ni9Mo2N laser welded lap joint exhibits a ferritic weisman structure,with the weld width ranging from 335.3 to 404.0μm.The heat affected zone(HAZ)is narrow.The tensile force of the welded joint exceeds 5.4939kN,which is better than 73.7%of the tensile force after 3Cr19Ni9Mo2N base metal strengthening,and meets the welding performance requirements of the product.The welding joint demonstrates excellent performance,and the welding seam has no phenomena such as virtual welding and welding penetration.This process has been extensively applied in the development of the pressing belt of the solar wing pressing and releasing mechanism for a satellite.
作者
郭晨亮
武婧亭
焦云雷
薛江红
GUO Chenliang;WU Jingting;JIAO Yunlei;XUE Jianghong(Tianjin Aerospace Institute of Electrical and Mechanical Equipment,Tianjin 300301)
出处
《宇航材料工艺》
CSCD
北大核心
2024年第6期78-84,共7页
Aerospace Materials & Technology
作者简介
第一作者:郭晨亮,1983年出生,高级工程师,研究方向为航天器机构制造技术。E-mail:liangg-1111@163.com。
