Study on welding techniques for repair of slot weld in AWS specification

MIAO Minghua; WU Chongzhi

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Study on welding techniques for repair of slot weld in AWS specification
Vol. 49, Issue 6, Pages: 33-36(2019)
Published：2019
DOI：
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DOI：

MIAO Minghua, WU Chongzhi. Study on welding techniques for repair of slot weld in AWS specification[J]. Eletric Welding Machine2019, 49(6): 33-36. DOI：

摘要

AWS D1.1《钢结构焊接规范》和AWS D1.6《不锈钢结构焊接规范》对槽焊缝的焊接工艺评定、焊工资质评定和焊接操作都进行了明确规定

但是在实际应用中仍然存在将槽焊缝的焊接操作和坡口焊缝或者角焊缝的焊接操作相互混淆的情况

槽焊缝缺陷导致的质量事件时有发生。针对槽焊缝返修焊接工艺制定及焊接操作技术等问题

总结分析工程现场钢结构及模块施工中实际案例

在常规焊缝返修工作的实践基础上

根据AWS焊接规范要求

对槽焊缝的返修工作提出了专业性的方法

包括缺陷去除、坡口制备和返修焊接工艺制定等

并详细介绍了不同焊接位置下槽焊缝返修的焊接操作技术。

Abstract

Despite that the requirements on the welding technology specification

welder qualification and welding operation for slot welds are defined in D1.1

[Steel Structure Welding Specification] and D1.6

[Stainless Steel Structure Welding Specification] of AWS

there are still cases that the welding operations for slot welds are mixed up with those for groove welds and fillet welds

resulting in quality incidents attributable to defects in slot welds. In view of such problems as development of the procedure for repair of slot welds and the welding operation techniques required

the cases in construction of steel structures and modules at project sites are analyzed

based on the repair of conventional welds

and the technical methods for repair of slot weld are put forward in accordance with the AWS specification requirements

including removal of defects

groove preparation and laying down the welding procedure for repair. And the operation techniques for repair of slot welds in various welding positions are introduced in detail.