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用自制的电磁离心铸造机,在离心机转速为960r/min,磁场强度分别为0.05、0.10、0.15、0.20T的条件下,制备了高碳高速钢,试验研究了不同磁场强度下的高碳高速钢的铸态组织和热处理后的组织与性能。结果表明:随着磁场强度的增加,高碳高速钢的铸态组织中角状、点状碳化物的分布逐渐趋于均匀、弥散,共晶碳化物呈现出先减少、变短,后增加、变长的趋势;热处理后组织中的共晶碳化物变细、变短,且在磁场强度为0.15T的试样中硬度、冲击韧度和耐磨性能达到最佳。
Using self-made electromagnetic centrifugal casting machine, high-carbon high-speed steel was prepared under the conditions of centrifuge speed of 960r / min and magnetic field strength of 0.05,0.10,0.15,0.20T, respectively. The effects of high-carbon Microstructure and properties of high speed steel after as-cast and heat treatment. The results show that with the increase of magnetic field intensity, the distribution of angular and point carbides in as-cast microstructure of high-carbon high-speed steel tends to be uniform and disperse. The eutectic carbide shows the first decrease, The eutectic carbide in the microstructure becomes thinner and shorter after heat treatment, and the hardness, impact toughness and wear resistance of the sample with a magnetic field strength of 0.15T are optimized.