Analysis of unqualified mechanical properties of 1Cr12MoV steel forgings and process improvement

doi:10.13251/j.issn.0254-6051.2023.11.049

Abstract

Abstract: In order to study the cause of unqualified mechanical testing for 1Cr12MoV steel forgings, chemical composition analysis, optical microscopy and scanning electron microscopy were used to analyze the chemical composition, microstructure and fracture morphology of the forgings. The results show that large-sized and aggregated eutectic carbides are existed in the matrix which reaches level 5 and doesn't meet the requirement of below level 3, which is the main reason for the failure of mechanical performance testing. Through elongating the forging stock by free forging, increasing the deformation during the forging process, and adding a preliminary heat treatment process, the distribution of eutectic carbides is greatly improved, and mechanical properties meet the delivery requirements.

Key words: 1Cr12MoV steel, forgings, eutectic carbide, deformation, preheat treatment

CLC Number:

TG161

Li Wei, Liu Jing, Shao Zhuhao, Hao Hongjun, Tang Lin, Jiang Tao. Analysis of unqualified mechanical properties of 1Cr12MoV steel forgings and process improvement[J]. Heat Treatment of Metals, 2023, 48(11): 300-304.

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