Microstructure and mechanical properties of underwater wet welded high carbon-equivalent steel Q460 using austenitic consumables

被引：32

作者：

Li, HongLiang ^{[1
]}

Liu, Duo ^{[1
,2
]}

Song, YanYu ^{[2
]}

Yan, YaoTian ^{[2
]}

Guo, Ning ^{[1
,2
]}

Feng, JiCai ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China

[2] Harbin Inst Technol Weihai, Shandong Prov Key Lab Special Welding Technol, Weihai 264209, Peoples R China

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2017年 / 249卷

关键词：

Q460; steel; Underwater wet welding; Flux-cored wire; Microstructure; Mechanical properties; DISSIMILAR METAL WELDS; FUSION BOUNDARY; STAINLESS-STEEL; EVOLUTION; CRACKING; JOINTS;

D O I：

10.1016/j.jmatprotec.2017.06.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Underwater wet flux-cored arc welding of Q460 steel using specially developed Ni-based filler and commercially obtained ER308 were investigated. Wet welded joints using Ni-based filler were of high performance with high ultimate tensile strength (518 MPa) and impact toughness of the weld metal (128.9 J/cm(2)). ER308 failed to acquire sound welded joints due to extensive slag remained in the bottom of groove. The highest microhardness (450 HV) was recorded on the coarse-grained heat-affected zone of the base metal for both joints. Typefibotmdaries existed in the interfaces between austenitic weld metal and ferritic base metal. Compared to austenitic stainless steel weld metal, nickel-based weld metal possessed the ability to be significantly diluted by Q460 base metal.

引用

页码：149 / 157

页数：9

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