摘要
利用金相显微镜、X-射线衍射等方法,研究了0.16C-1.47Si-1.64Mn-0.02Nb-0.02Ti冷轧TRIP钢不同两相区退火温度对组织和力学性能的影响。结果表明,实验钢在840℃退火180s和420℃等温240s处理后,可以获得53.0%的铁素体、38.6%的贝氏体、8.4%的残余奥氏体,此时可以获得较佳的相变诱发塑性和好的强韧性配合,其强塑积可达22.4×103MPa.%,较低或较高的退火温度都将减少残余奥氏体含量。
The influence of intercritical annealing temperature on microstructures and mechanical properties of 0. 16C-1. 47Si-1. 64Mn-0. 02Nb-0. 02Ti cold rolling TRIP （transformation induced plasticity） steel sheets was investigated by using optical microscopy and X-ray diffraction measurements. The results show that the maximal volume fraction of retained austenite, which is 8.4% （The volume fraction of ferrite and bainite is 53.0% and 38.6%, respectively）, can be obtained by heat treatment in anealing at 840 ℃ for 180 s and isothermal heat treat at 420 ℃ for 240 s. The best strength and ductility product, which is 22.4 × 10^3 MPa%, is also obtained by this heat treatment process. The amount of retained austenite will bereduced at the higher or lower temperature in heat treatment process.
出处
《铸造技术》
CAS
北大核心
2009年第11期1423-1426,共4页
Foundry Technology
关键词
TRIP钢
相变诱发塑性
两相区退火温度
残余奥氏体
TRIP steel
Transformation induced plasticity
Intercritical annealing temperature
Retained austenite
