工程科学学报2017，Vol.39Issue(6)：854-858,5.DOI:10.13374/j.issn2095-9389.2017.06.006
析出强化与孪晶强化在Fe--24 Mn--3 Si--3 Al TWIP钢退火过程中的作用机制
Mechanism of precipitation strengthing and twinning strengthing in annealing process of Fe--24 Mn--3 Si--3 Al TWIP steel
摘要
Abstract
The mechanical properties and strengthening mechanism of Fe-24Mn- 3Si- 3Al TWIP steels were investigated as a function of annealing process. The microstructures of the samples were analyzed by transmission electron microscopy, scanning electron microscopy, energy disperse spectroscopy. The experimental results indicate that as the annealing temperature and the holding time change, the mechanical properties of TWIP steel do not rise or fall monotonously, as would be conventionally. The mechanical proper-ties change in the annealing processes of annealing temperature 800℃ for 10 min and 900℃ for 20 min. The strengthening mechanism is mainly dispersion strengthening in the case of annealing process of 800℃ annealing temperature for 10 min, and an increase in the precipitation of ( Fe, Mn) 23 C6 leads to better mechanical properties. However, in the case of annealing process of 900℃ for 20 min, the precipitation of ( Fe, Mn) 23 C6 does not change obviously, but many twinning systems are initiated and secondary twin and twin de-livery are observed, which result in an increase in the ultimate tensile strength.关键词
TWIP钢/退火/碳化物析出/二次孪晶/强化机制Key words
TWIP steel/annealing/carbide precipitation/secondary twin/strengthening mechanism分类
矿业与冶金引用本文复制引用
杨永刚,米振莉,江海涛,李辉,徐梅..析出强化与孪晶强化在Fe--24 Mn--3 Si--3 Al TWIP钢退火过程中的作用机制[J].工程科学学报,2017,39(6):854-858,5.基金项目
国家重点研发计划资助项目(2016YFB0101605) （2016YFB0101605）
