K-TIG焊在应变强化S30408不锈钢压力容器上的试验研究  

Application and Research for K-TIG Welding Technology in S30408 Stainless Steel Pressure Vessels

作　　者：陈日昱 严晓君 田文博 马本勤 徐永松 陈金豹 CHEN Riyu;YAN Xiaojun;TIAN Wenbo;MA Benqin;XU Yongsong;CHEN Jinbao(Chengxi(Taizhou)Equipment Technology Co.,Ltd.,Taizhou 214514,China;Taizhou Branch of Jiangsu Provincial Institute of Special Equipment Safety Supervision and Inspection,Taizhou 214500,China)

机构地区：[1]中船澄西(泰州)装备科技有限公司,江苏泰州214514 [2]江苏省特种设备安全监督检验研究院泰州分院,江苏泰州214500

出　　处：《电焊机》2022年第10期72-79,共8页Electric Welding Machine

摘　　要：降低重容比、实现轻量化对“双碳”目标下的焊接技术提出了更高的应用要求。针对高效深熔氩弧焊(以下简称K-TIG)技术在应变强化容器上的应用开展试验研究,分析对比采用K-TIG工艺焊接国产奥氏体不锈钢S30408在0%预拉伸(方案A)、采用应力控制法对产品焊接试板进行预拉伸(方案B),以及对容器进行应变强化试验后(方案C)焊接接头的强度、断口形貌、塑性、韧性、金相组织、晶粒度、夹渣等的变化。结果表明,K-TIG焊接头质量稳定,焊缝成形美观,生产效率大幅提升,方案A、B、C三种不同条件下的试样各项性能指标均满足标准要求。经过应变强化后,接头屈服强度显著增加,激发了塑性储备,有效提高了屈强比,可更大程度地发挥材料的承载能力,进而提高材料实际的许用应力,实现了轻量化的绿色设计与制造,可用于低温压力容器的制造。To reduce the ratio of weight to volume and realize the lightweight, the welding technology under the“Double carbon”target has put forward higher application requirements.In this paper, the application of high efficiency deep penetration Argon arc welding technology in strain-strengthened vessel is studied, the changes of strength, fracture morphology, plasticity, toughness, microstructure, grain size and slag inclusion of the welded joint of domestic austenitic stainless steel S30408welded by K-TIG process under 0% pre-stretched, welding seam specimen made from the product welding test plate after pre-stretched by stress control method and the specimen made from the strain-strengthened vessels were analyzed and compared. The results show that welding joint quality is stable, the weld appearance is beautiful, and the production efficiency is greatly improved. The properties of the samples under different conditions of A,B and C all meet the standard requirements.After strain strengthening, the yield strength increases significantly, which stimulates the plasticity reserve, effectively improves the ratio of yield to strength, and brings into full play the bearing capacity of the material to a greater extent, thus increasing the practical allowable stress of the material, it can be used in the manufacture of low temperature pressure vessel.

关 键 词：K-TIG工艺 应变强化 S30408不锈钢 压力容器 轻量化 

分 类 号：TG456.9[金属学及工艺—焊接]