DH36钢摩擦叠焊焊点分布规律研究  

Spots distribution for friction stitch welded DH36 steel

作　　者：许威[1] 黄江中[1] 宋国祥[1] 张大伟[1] 王志江[2] 贺钧[2] 王东坡[2] 

机构地区：[1]海洋石油工程股份有限公司,天津市300452 [2]天津大学天津市现代连接技术重点实验室,300350

出　　处：《焊接》2016年第2期40-42,71,共3页Welding & Joining

摘　　要：摩擦叠焊是一种新型的水下修复方法。在单排孔DH36钢干式摩擦叠焊工艺试验中发现在塞孔底部容易出现未熔合现象,针对这一问题进行了分析,建立钻头受力模型,发现钻孔时钻头所处不同区域的硬度变化造成了钻孔的偏斜,从而影响焊接质量,进而提出了相应的解决方案,对摩擦叠焊中焊点分布及焊接次序进行了研究。Friction stitch welding is an innovative welding method for underwater repairing. Lack of bonding is one of the defects usually seen in the single-row dry friction stitch welding of DH36. A force model of drilling bit was established to study the lack of bonding. It is found that the deflection of the drilled hole,due to the different hardness at different sides of the drill bit,is one of the main causes of lack of bonding.A solution was proposed to design the friction stitch welded spots distribution and welding sequence.

关 键 词：焊点分布 钻头受力模型 摩擦叠焊 DH36钢 

分 类 号：TG456[金属学及工艺—焊接]