Al含量对高锰高铝轻质钢组织和力学性能的影响
Effect of aluminum content on microstructure and mechanical properties of high manganese high aluminum lightweight steels
白瑞 1杜云飞 1贺秀丽 1梁红玉1
作者信息
- 1. 太原工业学院机械工程系,山西 太原 030008
- 折叠
摘要
利用物相分析、显微组织表征和室温拉伸、硬度测试等手段,以3种不同Al含量(10％,12％,14％,质量分数)的高锰高铝轻质钢为研究对象,探究了其铸态及固溶态的力学性能以及第二相的析出规律.结果表明,在铸态下,随着Al含量的增加,试验钢中铁素体含量增加,在奥氏体晶间呈不连续析出;κ碳化物的尺寸不断变大,主要由奥氏体晶内析出.经1100 ℃固溶处理后,试验钢可获得强度与塑性的协同提高,Al含量为12％的试验钢具有良好的综合性能,密度为6.41 g·cm-3,比强度为157 MPa·cm3·g-1,断后伸长率为26.2％.
Abstract
Mechanical properties and the precipitation evolution of second phase of high manganese high aluminum lightweight steels as-cast and solution treated with different aluminum contents(10％,12％,14％,mass fraction)were investigated by using methods such as phase analysis,microstructural characterization and room temperature tensile and hardness tests.The results show that under as-cast state,with the increase of Al content,the content of ferrite in the tested steels increases and precipitating discontinuously between austenite grains,the size of K-carbides continuously increases and mainly precipitating within austenite grains.After solution treatment at 1100 ℃,the tested steels exhibit improved strength and plasticity.The tested steel with 12％aluminum obtains excellent comprehensive properties,of which the density is 6.41 g·cm-3,the specific strength is 157 MPa·cm3·g-1,the elongation after fracture is 26.2％.
关键词
高锰高铝轻质钢/Al含量/固溶处理/κ碳化物/力学性能Key words
high manganese high aluminum lightweight steel/Al content/solution treatment/K-carbide/mechanical properties引用本文复制引用
基金项目
山西省高等学校科技创新项目(2022L550)
出版年
2024
NETL
NSTL
万方数据