摘要
无碳化物贝氏体/马氏体复相高强钢具有比同等强度马氏体钢更优异的韧性和塑性,被广泛应用到轨道交通、机械、建筑等领域。文章概述了低成本Mn-Si-Cr系无碳化物贝氏体/马氏体复相钢近年来在合金化设计、工艺设计、微观组织、强韧化机理、强塑化机理、延迟断裂及疲劳性能等方面取得的研究成果。特别介绍了近年来笔者在BQ&P工艺处理CFB/M复相钢方面的工作进展,经过BQ&P处理之后,CFB/M复相钢显示了更优异的强度、塑性、韧性和疲劳性能的匹配。最后简单介绍了Mn-Si-Cr系无碳化物贝氏体/马氏体复相钢在不同领域的应用情况,特别是其在重载高速铁路领域的应用现状和前景。
The carbide-free bainite/martensite（CFB）multiphase high strength steels have excellent combination of strength and toughness which is superior to the martensite steels.Hence,these CFB/M multiphase steels have been used in the fields of railway,transport,machine,build,etc.The paper reviews recent works on the alloying design,heat treatment,microstructure characterization,mechanism of strengthening,toughening and ductility,delayed fracture properties,fatigue properties,of the low-cost Mn-Si-Cr series CFB/M multiphase steels.In particular,the novel CFB/M multiphase steels treated by BQP treatment are introduced.The results show that the BQP treated CFB/M multiphase steels exhibits more excellent combination of strength,ductility,toughness and fatigue properties.The paper also presents the applications of the Mn-Si-Cr series CFB/M multiphase steels,especially in the field of the heavy-haul and high-speed railway.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2017年第21期74-81,共8页
Materials Reports
基金
国家自然科学基金面上项目(51271013
51301012)
北京市自然科学基金面上项目(2172047)
关键词
高强钢
无碳化物贝氏体/马氏体复相组织
强韧性
疲劳性能
BQ&P工艺
high strength steel
carbide-free bainite/martensite multiphase microstructure
strength and toughness
fatigue property
BQ&P process
