Effects of composition and heat treatment process on properties of 12MDV6 cast steel for nuclear power main equipment supporting

doi:10.13251/j.issn.0254-6051.2022.06.035

Abstract

Abstract: By comparing effects of different compositions and heat treatment processes on the mechanical properties of 12MDV6 cast steel for nuclear power main equipment supporting, a reasonable heat treatment process and composition control were proposed by tensile test, impact test, metallographic test and composition test. The results show that the tempering temperature has a great influence on the tensile properties, and the appropriate tempering temperature is 690 ℃. The strength increases with increasing of the carbon content and alloying elements, but alloying elements have no obvious influence on elongation. The unqualified low temperature impact property is mainly caused by the high content of Al, macrosegregation of Al composition causes fluctuations in low temperature impact absorbed energy. In order to meet the requirements of impact property, the Al content should be controlled below 0.018%.

Key words: 12MDV6 cast steel, properties, composition, heat treatment process

CLC Number:

TG156

You Shenshen, Yu Haihua. Effects of composition and heat treatment process on properties of 12MDV6 cast steel for nuclear power main equipment supporting[J]. Heat Treatment of Metals, 2022, 47(6): 186-191.

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