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
收藏
页码：231 / 241
页数：11
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