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《Tianjin Science & Technology》 2016-02
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Effect of Quenching Temperature on Microstructure and Properties of P20 Steel

LI Yong;LEI Wenhua;ZHOU Yi;Science College of Tibet University;  
The quenching microstructure of P20 steel was investigated with scanning electronic microscope and metallurgical microscope.The quenched hardness at different temperatures was measured with Rockwell hardmeter.The experimental results show that the lath martensite has been attained after the steel quenched from 830 ℃ to 920 ℃ and the grains of steel gradually increase with the elevation of quenching temperatare,however the increase of size is not obvious until the temperature is higher than 890 ℃.So the better quenching temperature of heat-treated P20 steel shoud be lower than 890 ℃。
【CateGory Index】: TG161;TG142.1
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