Study on Microstructure and Mechanical Properties of a New Type of Low Ni Duplex Stainless Steel Resistance Spot Welding

被引：3

作者：

Pan, Mingming ^{[1
]}

Zhang, Jun ^{[1
]}

Zhang, Xiaoming ^{[2
]}

机构：

[1] Shenyang Univ, Sch Mech Engn, Shenyang 110044, Peoples R China

[2] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2024年 / 33卷 / 18期

关键词：

low Ni duplex stainless steel; microstructure; mechanical properties; phase transformations; resistance spot welding; PROCESS PARAMETERS; OPTIMIZATION; TENSILE; SHEAR;

D O I：

10.1007/s11665-023-08595-w

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the microstructure and mechanical properties of a new type of low Ni duplex stainless steel after resistance spot welding were studied. The welding current has a great influence on the welding performance of resistance spot welding, so it is necessary to clarify the influence law and mechanism of welding current on the welding performance of low Ni duplex stainless steel. The microstructure of the samples under different welding currents was analyzed in detail by EBSD, and the mechanical properties of the treated samples were measured. The results show that the volume fraction of austenite in nugget zone is affected by changing welding current. This is because the higher cooling rate of resistance spot welding inhibits the phase transformation of ferrite to austenite and reduces the volume fraction of austenite, resulting in the imbalance of ferrite and austenite phases. When the welding current is the largest, the cooling rate is the lowest, which corresponds to the highest austenite volume fraction.

引用

页码：9480 / 9487

页数：8

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