摘要
鉴于1.0Si高Si型TRIP钢表面质量的恶化,本文设计了一种新型1.5Al高Al型TRIP钢。研究了退火温度和贝氏体区等温时间对两种钢力学性能的影响,并表征了1.5Al钢的微观组织。结果表明,随退火温度的升高,1.0Si和1.5Al试验钢的抗拉强度均先升高后降低,在840℃的退火温度下呈现抗拉强度的最高值;随贝氏体区等温时间的延长,1.0Si和1.5Al试验钢的抗拉强度均降低,而伸长率均逐渐提高,1.5Al试验钢的抗拉强度和伸长率均高于1.0Si钢; 1.5Al钢中的残留奥氏体存在两种形态,铁素体晶粒间的块状残留奥氏体,宽度在180 nm左右,贝氏体板条间的薄膜状残留奥氏体,宽度在80 nm左右。
A 1.5 Al TRIP steel was investigated because of the bad effect of Si element on surface quality of 1.0 Si TRIP steels.The influence of annealing temperature and isothermal holding time in bainite zone on mechanical properties was studied,and the microstructure of 1.5 Al steel was characterized.The results indicate that the tensile strength of both steels increases first,and then has a decreasing trend with increasing of the annealing temperature,and has the peak value at 840 ℃.With the increasing of the isothermal holding time in bainite zone,the tensile strength of both steels decreases,while the elongation increases.The tensile strength and elongation of the 1.5 Al steel is higher than that of the 1.0 Si steel.The retained austenite in the 1.5 Al steel has two morphologies： blocky type at ferrite grain boundaries which has a size of 180 nm,and film type between bainite plates which has a size of 80 nm.
作者
滕敦波
裴高登
代永娟
Teng Dunbo;Pei Gaodeng;Dai Yongjuan(Yantai Nanshan University,Yantai Shandong 265713,China;Department of Automotive Plate,Shandong Nanshan Aluminum Co.,Ltd.,Yantai Shandong 265700,China;College of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei 050018,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第10期164-167,共4页
Heat Treatment of Metals
基金
山东省自然科学基金(ZR2018MEM007)
烟台市重点研发计划(2017ZH081)
关键词
高铝TRIP钢
高硅TRIP钢
微观组织
热处理
力学性能
high aluminum TRIP steel
high silicon TRIP steel
microstructure
heat treatment
mechanical properties
