Effect of Heat Treatment on Microstructure and Hardness of 9Cr13Mo3Co3Nb2V Steel

HUO Dengping; LIANG Zhikai

doi:10.11868/j.issn.1005-5053.2016.6.006

Journal of Aeronautical Materials (Dec 2016)

Effect of Heat Treatment on Microstructure and Hardness of 9Cr13Mo3Co3Nb2V Steel

HUO Dengping,
LIANG Zhikai

Affiliations

HUO Dengping: Inspection & Test Centre, Xi'an Flight Automatic Control Research Institute, Xi'an 710065, China;
LIANG Zhikai: Beijing Institute of Aeronautical Materials, Beijing 100095, China

DOI: https://doi.org/10.11868/j.issn.1005-5053.2016.6.006
Journal volume & issue: Vol. 36, no. 6
pp. 35 – 39

Abstract

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Effect of heat treatment on the microstructure and hardness of 9Cr13Mo3Co3Nb2V steel was studied systematically by metallographic examination and hardness testing. The results show that after quenching, cryogenic treatment and multiple tempering, the retained austenite of 9Cr13Mo3Co3Nb2V steel is adequately transformed into tempered martensite, and the significant secondary hardening effect is brought. Consequently the steel gains stable microstructure and high hardness. Secondary carbide begins to precipitate and the secondary hardening effect emerges when the tempering temperature is above 350℃, and the tempering hardness reaches the maximum value when tempering temperature range is from 480℃ to 520℃.

Published in Journal of Aeronautical Materials

ISSN: 1005-5053 (Print)
Publisher: Journal of Aeronautical Materials
Country of publisher: China
LCC subjects: Technology: Motor vehicles. Aeronautics. Astronautics
Website: http://jam.biam.ac.cn/indexen.htm

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