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Indexed by:期刊论文

Date of Publication:2014-06-01

Journal:China Welding (English Edition)

Included Journals:EI、Scopus

Volume:23

Issue:2

Page Number:1-6

ISSN No.:10045341

Abstract:The influence of temperature during post-weld heat treatment on the microstructure and properties of KMN steel joints was investigated. The results reveal that after heat treatment, the martensite transformed to tempered sorbite, causing the softening of the resultant joints. XRD test shows that the residual austenite content decreased obviously when the joint was heat-treated at 550?? and 580??, which degraded the impact toughness of heat-affected zone (HAZ). When the heat treatment temperature increased further, the dispersion strengthening from the precipitation of alloying elements improved the impact toughness of HAZ. The aggregation and coarsening of carbide also contributed to the improvement of impact toughness of HAZ. Copyright: ? 2014 Editorial Board of CHINA WELDING.