【摘要】 作为新型低合金耐磨钢,根据其硬度和冲击韧度,硅锰钢一定程度上可替代高锰钢,用作圆锥衬板材料,以提高衬板性能并降低成本。研究了ZG31Mn2Si在890℃正火预处理+890℃淬火+200℃回火的热处理条件下,含碳量在0.2%~0.55%之间时对其显微组织和力学性能(硬度和冲击韧度)的影响。结果表明:当合金的含碳量逐渐增加时,组织中的残余奥氏体量逐渐减少,板条马氏体中逐渐出现少量针状或片状马氏体;随含碳量增加,合金硬度逐渐提高,而冲击韧度整体呈下降趋势。ZG31Mn2Si碳含量为0.30%时,最大硬度值HRC 47,冲击韧度值33 J/cm2,综合性能最优。更多还原

【Abstract】 Silico-manganese steel is a kind of new low alloy wear-resistant steel. To a certain extent, according to its hardness and impact toughness, it can be used to replace the high manganese steel to make the conical liner for improving the performance of the liner and reducing the cost. The effects of carbon content of 0.2%~0.55%on the microstructure and mechanical properties(hardness and impact toughness) were studied with normalizing pretreatment at 890 ℃, quenching treatment at 890 ℃ and temper treatment at 200 ℃. The results show that when the carbon content of the alloy is gradually increased, the amount of residual austenite will be gradually reduced, and the gradual emergence of acicular or flake martensite in lath martensite; with the increase of carbon content, the hardness of alloy increases gradually, while the impact toughness decreases. When the carbon content is 0.30%, its comprehensive performance is the best. The maximum hardness value is HRC 47 and impact toughness is 33 J/cm2.更多还原