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Effect of Heat Treatment Process on Microstructure and Mechanical Properties of Cr8Mo2VSi and D2 Cold Work Steel

Chi Hong-xiao

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Abstract

The effect of heat treatment on the microstructure and mechanical properties of Cr8Mo2VSi and D2 cold work steels were investigated.The results show that carbides in Cr8Mo2VSi were more finer and distributed uniformly than in D2 steel.After heating at 1020-1040 ℃ then quenching in oil,Cr8Mo2VSi had lower hardness than that of D2 steel,but after tempering at higher temperature,secondary hardening of Cr8Mo2VSi was more obvious and Cr8Mo2VSi by 1-2HRC was harder than D2 steel,furthermore Cr8Mo2VSi had better combination of toughness and strength than D2.

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What this paper is about

The effect of heat treatment on the microstructure and mechanical properties of Cr8Mo2VSi and D2 cold work steels were investigated.The results show that carbides in Cr8Mo2VSi were more finer and distributed uniformly than in D2 steel.After heating at 1020-1040 ℃ then quenching in oil,Cr8Mo2VSi had lower hardness than that of D2 steel,but after tempering at higher temperature,secondary hardening of Cr8Mo2VSi was more obvious and Cr8Mo2VSi by 1-2HRC was harder than D2 steel,furthermore Cr8Mo2VSi had better combination of toughness and strength than D2.

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Available abstract

The effect of heat treatment on the microstructure and mechanical properties of Cr8Mo2VSi and D2 cold work steels were investigated.The results show that carbides in Cr8Mo2VSi were more finer and distributed uniformly than in D2 steel.After heating at 1020-1040 ℃ then quenching in oil,Cr8Mo2VSi had lower hardness than that of D2 steel,but after tempering at higher temperature,secondary hardening of Cr8Mo2VSi was more obvious and Cr8Mo2VSi by 1-2HRC was harder than D2 steel,furthermore Cr8Mo2VSi had better combination of toughness and strength than D2.

Key concepts: Tempering, Microstructure, Materials science, Metallurgy, Toughness, Carbide, Quenching (fluorescence), Work (physics)

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