Effect of Heat Treatment on Mechanical Properties and Microstructure Morphology of Low-Alloy High-Strength Steel

Archives of Metallurgy and Materials

K. Bolanowski¹ 

[1] Kielce University of Technology, Faculty of Mechatronics and Mechanical Engineering, 7th. Tysi?clecia Pa?stwa Polskiego Av ., 25-314 Kielce, Poland;

关键词: Keywords: microalloyed steel;    mechanical properties;    microstructure;   

DOI  :  10.1515/amm-2016-0066

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The paper analyzes the influence of different heat treatment processes on the mechanical properties of low-alloy high-strength steel denoted by Polish Standard (PN) as 10MnVNb6. One of the findings is that, after aging, the mechanical properties of rolled steel are high: the yield strength may reach > 600 MPa, and the ultimate tensile strength is > 700 MPa. These properties are largely dependent on the grain size and dispersion of the strengthening phase in the ferrite matrix. Aging applied after hot rolling contributes to a considerable rise in the yield strength and ultimate tensile strength. The process of normalization causes a decrease in the average grain size and coalescence (reduction of dispersion) of the strengthening phase. When 10MnVNb6 steel was aged after normalization, there was not a complete recovery in its strength properties.

【 授权许可】

Unknown