Design and Development of Galvannealed Dual-Phase Steel: Microstructure, Mechanical Properties and Weldability

被引：6

作者：

Chatterjee, Sourabh ^{[1
]}

Koley, Soumyajit ^{[1
]}

Sarkar, Rudra Bubai ^{[1
]}

Behera, Nibedita ^{[1
]}

Manna, Manindra ^{[1
]}

Mukherjee, Subrata ^{[1
]}

Kundu, Saurabh ^{[1
]}

机构：

[1] Tata Steel Ltd, Res & Dev, Jamshedpur 831007, Bihar, India

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2019年 / 28卷 / 01期

关键词：

dual-phase; formability; galvannealing; mechanical properties; resistance spot welding; steel; weldability; ASSISTED MULTIPHASE STEELS; FAILURE MODE; BAINITE TRANSFORMATION; SPOT WELDS; AUSTENITE; PERFORMANCE; BEHAVIOR; SIZE;

D O I：

10.1007/s11665-018-3804-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It was attempted to produce galvannealed dual-phase (DP) steel through a commercial continuous galvanizing line (CGL). The main challenge was to form the DP microstructure even with the slow cooling rate after annealing in the CGL. A two-pronged approach was adopted for this, viz. design of the steel chemistry with calculations and optimization of the CGL parameters with simulation using Gleeble-3800 thermomechanical simulator. The steel thus produced in CGL revealed ferrite and 18 +/- 2% martensite microstructure, with tensile strength exceeding 600MPa and 24% total elongation along with good formability. Weldability study using resistance spot welding indicated the possibility of achieving sound joint with a 4-kA width in weld time-current lobe despite the high carbon equivalence.

引用

页码：231 / 241

页数：11

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