Effect of Intercritical Annealing Time on the Microstructures and Tensile Properties of a High Strength TRIP Steel

被引：13
作者：
Wang, Chao [1 ]
Ding, Hua [1 ,2 ]
Zhang, Jun [1 ]
Wu, Hongyan [2 ]
机构：
[1] Northeastern Univ, Sch Met & Mat, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2014年 / 27卷 / 03期
基金：
中国国家自然科学基金;
关键词：
TRIP steel; Intercritical annealing; Carbon partitioning; Retained austenite; Stability; TRANSFORMATION-INDUCED-PLASTICITY; RETAINED AUSTENITE; MECHANICAL STABILITY; MULTIPHASE STEELS; CARBON; NB; ADDITIONS; CMNSI;
D O I：
10.1007/s40195-014-0061-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A new Mn-Si-Al-Mo-Nb transformation-induced plasticity steel was annealed by intercritical annealing for different durations to investigate the partitioning of C element and the volume fraction change of the microstructural constituents. Direct experimental evidence confirms the partitioning of C elements in different phases during heat treatment by Electron probe microanalysis and X ray diffraction. The distribution of the precipitates was investigated as well. It was revealed that the microstructures and mechanical properties of the investigated steels were affected by the intercritical annealing time. According to the present experiment, the volume fraction of retained austenite and the product of tensile strength and total elongation of investigated steel decrease with increasing intercritical annealing time. It was observed that high tensile strength of 1,103 MPa, total elongation of 21.3%, and strength-ductility product of 23,493.9 MPa % could be successfully produced in this experimental steel at intercritical annealing temperature of 830 degrees C, holding for 1 min, and isothermal bainite treatment of 440 degrees C for 5 min holding time.
引用
收藏
页码：457 / 463
页数：7
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