Influence of Austempering Conditions on Hardness and Microstructure of Bainite in Low-Alloyed Steel

IF 2.2 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science Pub Date : 2023-11-13 DOI:10.1007/s11661-023-07243-1

Adam Ståhlkrantz, Peter Hedström, Niklas Sarius, Annika Borgenstam

引用次数: 0

Abstract

Abstract The influence of austempering temperature and time on the microstructure and hardness of a low-alloyed bainitic steel is investigated in the temperature range 275 °C to 375 °C for up to 24 hours. It is shown that the dislocation density and coarseness of the bainitic microstructure are affected by the austempering temperature, while only the dislocation density is significantly affected by the austempering time. The hardness of the steel is estimated based on microstructure–property relations and is in good agreement with the measured hardness. In conclusion, the decrease in dislocation density is the main reason for loss in hardness upon increasing austempering temperature and/or time for the studied temperature range.

Abstract Image

查看原文本刊更多论文

等温回火条件对低合金钢贝氏体硬度和组织的影响

研究了在275 ~ 375℃条件下等温回火24小时，温度和时间对低合金贝氏体钢组织和硬度的影响。结果表明，等温回火温度对贝氏体组织的位错密度和粗度有影响，而等温回火时间只对位错密度有显著影响。根据显微组织-性能关系估算了钢的硬度，与实测硬度吻合较好。综上所述，在研究的温度范围内，随着等温温度和/或时间的增加，位错密度的降低是硬度损失的主要原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 工程技术-材料科学：综合

CiteScore

5.30

自引率

7.10%

发文量

322

审稿时长

6 months

期刊介绍： Metallurgical and Materials Transactions A focuses on the latest research in all aspects of physical metallurgy and materials science. It explores relationships among processing, structure, and properties of materials; publishes critically reviewed, original research of archival significance. The journal address the main topics of alloy phases; transformations; transport phenomena; mechanical behavior; physical chemistry; environment; welding & joining; surface treatment; electronic, magnetic & optical material; solidification; materials processing; composite materials; biomaterials; and light metals. MMTA publishes Technical Publications, Communications, Symposia, and more. Published with ASM International, The Materials Information Society and The Minerals, Metals & Materials Society (TMS)