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Effect of Heat Treatment on Microstructure and Mechanical Properties of Mould Steel

Zhen-Zhang Chen

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Abstract

The mechanical properties and microstructure evolution of 3Cr2Mo steel after tempering at 200～600 ℃ were investigated. The results show that the distribution and morphology of carbide and the mounts of M/A small islands play a key role in improving impact toughness and yield strength. The optimized tempering process is 350 ℃ for 3 h and air cooling,and the tensile strength and impact toughness of processed steel could be promoted nearly by 40% and 60%,respectively.

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What this paper is about

The mechanical properties and microstructure evolution of 3Cr2Mo steel after tempering at 200～600 ℃ were investigated. The results show that the distribution and morphology of carbide and the mounts of M/A small islands play a key role in improving impact toughness and yield strength. The optimized tempering process is 350 ℃ for 3 h and air cooling,and the tensile strength and impact toughness of processed steel could be promoted nearly by 40% and 60%,respectively.

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Available abstract

The mechanical properties and microstructure evolution of 3Cr2Mo steel after tempering at 200～600 ℃ were investigated. The results show that the distribution and morphology of carbide and the mounts of M/A small islands play a key role in improving impact toughness and yield strength. The optimized tempering process is 350 ℃ for 3 h and air cooling,and the tensile strength and impact toughness of processed steel could be promoted nearly by 40% and 60%,respectively.

Key concepts: Tempering, Microstructure, Materials science, Toughness, Ultimate tensile strength, Carbide, Metallurgy, Composite material

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