摘要
根据镀锌工艺要求设计w(Al)为1.2%的TRIP钢进行实验研究,使用光学显微镜、SEM、XRD以及拉伸试验对TRIP钢的微观组织和性能进行检测和分析。结果表明,w(Al)为1.2%的TRIP钢的Ac1达到747℃、Ac3达到930℃,在贝氏体区等温30 s即可得到最大强塑积。实验TRIP钢退火组织中残留奥氏体体积分数和残留奥氏体中的w(C)可以通过改变两相区的温度以及贝氏体的等温时间加以控制。
A kind of cold-rolled TRIP steel containing 1.2 % aluminum for galvanizing was investigated in this paper.Optical microscopy,scanning electron microscopy,X-ray diffraction techniques and tensile test were used to characterize the microstructures and to determine the mechanical properties.It was showed that Ac1 was 747 ℃ and Ac3 was 930 ℃ for the TRIP steel and the maximum product of strength and elongation was obtained at 30 s during isothermal holding temperatures.By varying the annealing temperature within the austenite-ferrite region and the isothermal holding time,the amount of retained austenite and the amount of carbon within the retained austenite in the final microstructures can be controlled.
出处
《钢铁研究》
CAS
2011年第3期29-32,共4页
Research on Iron and Steel
关键词
镀锌
TRIP钢
贝氏体转变
残余奥氏体
galvanizing
TRIP steel
bainite transformation
retained austenite
