Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds

被引：402
作者：
Muthupandi, V [1 ]
Srinivasan, PB
Seshadri, SK
Sundaresan, S
机构：
[1] Reg Engn Coll, Dept Met Engn, Tiruchirappalli 620015, India
[2] Indian Inst Technol, Dept Met Engn, Madras 600036, Tamil Nadu, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 358卷 / 1-2期
关键词：
duplex stainless steel; GTA welding; electron beam welding; mechanical properties; heat treatment;
D O I：
10.1016/S0921-5093(03)00077-7
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The excellent combination of strength and corrosion resistance in duplex stainless steels (DSS) is due to their strict composition control and microstructural balance. The ferrite-austenite ratio is often upset in DSS weld metals owing to the rapid cooling rates associated with welding. To achieve the desired ferrite-austenite balance and hence properties, either the weld metal composition and/or the heat input is controlled. In the current work, a low heat input process viz., EBW and another commonly employed process, gas tungsten-arc welding have been employed for welding of DSS with and without nickel enhancement. Results show that (i) chemical composition has got a greater influence on the ferrite-austenite ratio than the cooling rate, (ii) and even EBW which is considered an immature process in welding of DSS, can be employed provided means of filler addition could be devised. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：9 / 16
页数：8
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