Effect of bismuth-tin alloy quenching medium on microstructure and properties of boron steel
Bismuth tin alloy is thought suitable as a cooling media after comparing it with common low melting point metals.Thus,the maximum cooling rate and corresponding temperature cooling characteristics of bismuth tin alloy at different temperature states were characterized by using a cooling medium characteristic testing instrument.At the same time,a JMatPro software was used to simulate and calculate the variation of alloy density and viscosity values of bismuth tin with temper-ature.Metallographic observation and mechanical properties measurement was conducted to invest-igate the effect of quenching process on the microstructure and properties of boron containing steel.The results show that the bismuth tin alloy has stable physical properties and excellent cooling char-acteristics in the molten state,and can be used as a cooling media for the quenching process.The ex-perimental steel can be achieved the best comprehensive performance after it is quenched in a bis-muth tin alloy at 150-200 ℃.
contains B steelquenchingcooling mediabismuth tin alloylow-melting-point alloy
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