Al含量对高锰高铝轻质钢组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.08.008

金属热处理 ›› 2024, Vol. 49 ›› Issue (8): 48-52.DOI: 10.13251/j.issn.0254-6051.2024.08.008

Al含量对高锰高铝轻质钢组织和力学性能的影响

白瑞, 杜云飞, 贺秀丽, 梁红玉

太原工业学院机械工程系, 山西太原 030008

收稿日期:2024-02-05 修回日期:2024-06-07 出版日期:2024-08-25 发布日期:2024-09-27
作者简介:白瑞(1987—),男,讲师,硕士,主要研究方向为轻质高强钢,E-mail:br2012@126.com
基金资助:
山西省高等学校科技创新项目(2022L550)

Effect of aluminum content on microstructure and mechanical properties of high manganese high aluminum lightweight steels

Bai Rui, Du Yunfei, He Xiuli, Liang Hongyu

Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan Shanxi 030008, China

Received:2024-02-05 Revised:2024-06-07 Online:2024-08-25 Published:2024-09-27

摘要/Abstract

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%。

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

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 κ-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%.

Key words: high manganese high aluminum lightweight steel, Al content, solution treatment, κ-carbide, mechanical properties

中图分类号:

TG142.1

白瑞, 杜云飞, 贺秀丽, 梁红玉. Al含量对高锰高铝轻质钢组织和力学性能的影响[J]. 金属热处理, 2024, 49(8): 48-52.

Bai Rui, Du Yunfei, He Xiuli, Liang Hongyu. Effect of aluminum content on microstructure and mechanical properties of high manganese high aluminum lightweight steels[J]. Heat Treatment of Metals, 2024, 49(8): 48-52.

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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

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