Pulsed current GMAW for superior weld quality of austenitic stainless steel sheet

被引：20
|
作者：
Ghosh, Prakriti Kumar [1 ]
Kulkarni, Shrirang Gurunath [1 ]
Kumar, Manish [1 ]
Dhiman, Harsh Kumar [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Roorkee 247667, Uttar Pradesh, India
来源：
ISIJ INTERNATIONAL | 2007年 / 47卷 / 01期
关键词：
austenitic stainless steel; P-GMAW; inter granular corrosion; heat input; phi; weld geometry;
D O I：
10.2355/isijinternational.47.138
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The performance of pulsed current gas metal arc welding (P-GMAW) and conventional gas metal arc welding (GMAW) processes in welding of 2.5 mm thin stainless steel sheet at different heat input has been studied. The use of P-GMAW at low heat input has been found superior to the use of GMAW process with respect to significant reduction in intergranular corrosion (IGC) susceptibility along with considerable improvement in some other characteristics of weld joint by maintaining comparable mechanical properties. It was further observed that the IGC, weld geometry and microstructure of P-GMA weld joint are largely governed by pulse parameters, and varies as a function of factor phi, defined as a summarized influence of pulse parameters such as peak current, base current, pulse-off time and pulse frequency. The increase of 0 has been found favourable to reduce IGC, weld geometry along with refinement of the cast (dendritic) structure of weld deposit.
引用
收藏
页码：138 / 145
页数：8
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