Retained anstenite characteristics and tensile properties in a TRIP type bainitic sheet steel
Retained anstenite characteristics and tensile properties in a TRIP type bainitic sheet steel
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DOI：
10.2355/isijinternational.40.902
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发表时间：
2000-01-01
影响因子：
1.8
通讯作者：
Kashima, T
中科院分区：
文献类型：
--
作者：
Sugimoto, K;Iida, T;Kashima, T
研究了0.2C-1.5Si-1.5Mn（质量分数）高强度冷轧“TRIP型贝氏体钢”的残余奥氏体特征和拉伸性能，并与残余奥氏体的相变诱发塑性（TRIP）有关。该钢主要由贝氏体铁素体板条基体、块状马氏体和5- 12vol%的稳定残余奥氏体膜组成。在M-S温度以上等温淬火时，该钢的抗拉强度可达900 MPa，总延伸率可达15- 20%，断面收缩率可达40- 60%。良好的塑性主要是由于均匀细小的板条组织、初始马氏体和残余奥氏体的TRIP效应。以及由未转变的残余奥氏体膜引起的长程内应力的小贡献。
Retained austenite characteristics and tensile properties in a 0.2C-1.5Si-1.5Mn, mass%, high-strength cold-roiled "TRIP type bainitic steel" which was associated with the transformation induced plasticity (TRIP) of the retained austenite were investigated. The steel mainly consisted of bainitic ferrite lath matrix, blocky martensites and stable retained austenite films of 5-12 vol%. When austempered at temperatures above M-S temperature, the steel possessed high tensile strength of 900 MPa, large total elongation of 15-20 % and large reduction of area of 40-60 %. The good ductility was mainly owing to uniform fine lath structure, initial martensite and the TRIP effect of retained austenite. as well as a small contribution of long range internal stress resulting from untransformed retained austenite films.