水下湿法焊接裂纹敏感性试验  

Cracking sensitivity test of underwater wet welding

作　　者：彭伟[1] 黄江中[1] 王超[1] 郭钢[1] 王金生[1] 

机构地区：[1]海洋石油工程股份有限公司,天津300452

出　　处：《电焊机》2017年第5期124-128,共5页Electric Welding Machine

摘　　要：潜水焊工在水深2m的水池里,使用水下专用焊条进行EH36和16Mn试板湿法焊接试验。依据GB4675.1-1984斜Y型坡口焊接裂纹实验方法,评价水下湿法焊接接头的冷裂纹敏感性。小铁研实验表明,水下湿法焊接接头的抗裂性很差,裂纹率基本为100%。裂纹是从根部产生,沿着熔合线向焊缝表面或者焊缝表面熔合线区域扩展。同时提出了水下湿法焊接冷裂纹防止的一些建议。EH36 and 16Mn test plates were wet welded using underwater special electrode by underwater welders at the pool of a depth of two meters. The cold cracking susceptibility of the resultant welding joints was studied according to GB4675.1-1984： Method of Y groove cracking test. The Y-groove cracking test shows that underwater wet welding joint crack resistance is poor and the crack rate is 100% basically, it originates from the root,and then propagates along the fusion line to the weld surface or the fusion line of the weld surface. At the same time,some suggestions are put forward to prevent the cold crack in underwater wet welding.

关 键 词：DH36 16Mn 水下湿法焊接 裂纹敏感性 

分 类 号：TG456.5[金属学及工艺—焊接]