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Influence of Quenching Temperature on Microstructure and Hardness of M2Al High Speed Steel

Guo Jin-gang

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Abstract

Influence of quenching temperature on microstructure and hardness of M2Al high speed steel were studied. The results show that by increasing the quenching temperature until 1 230 ℃ the hardness of M2Al high speed steel increases with the finer grain and dispersed carbide. But quenching temperature exceed (1 230 ℃) would result grain coarsening and network distributed carbide. The microstructure of quenching are martensite, carbide and retained austenite, and are martensite and carbide by quenching and three times tempering. The grain-size number of M2Al high speed steel attain to 10 grade after quenching at 1 230 ℃. The optimum quenching temperature is proposed for M2Al high speed steel.

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What this paper is about

Influence of quenching temperature on microstructure and hardness of M2Al high speed steel were studied. The results show that by increasing the quenching temperature until 1 230 ℃ the hardness of M2Al high speed steel increases with the finer grain and dispersed carbide. But quenching temperature exceed (1 230 ℃) would result grain coarsening and network distributed carbide. The microstructure of quenching are martensite, carbide and retained austenite, and are martensite and carbide by quenching and three times tempering. The grain-size number of M2Al high speed steel attain to 10 grade after quenching at 1 230 ℃. The optimum quenching temperature is proposed for M2Al high speed steel.

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Available abstract

Influence of quenching temperature on microstructure and hardness of M2Al high speed steel were studied. The results show that by increasing the quenching temperature until 1 230 ℃ the hardness of M2Al high speed steel increases with the finer grain and dispersed carbide. But quenching temperature exceed (1 230 ℃) would result grain coarsening and network distributed carbide. The microstructure of quenching are martensite, carbide and retained austenite, and are martensite and carbide by quenching and three times tempering. The grain-size number of M2Al high speed steel attain to 10 grade after quenching at 1 230 ℃. The optimum quenching temperature is proposed for M2Al high speed steel.

Key concepts: Quenching (fluorescence), Tempering, Materials science, Microstructure, High-speed steel, Martensite, Metallurgy, Carbide

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