C和Mn元素对BTW型中锰钢性能研究

Study on the Properties of C and Mn Elements for BTW Medium Manganese Steel

摘要: 本文研究了C和Mn元素对BTW中锰钢性能的影响，利用金相显微镜、拉伸试验机、冲击试验机、摩擦磨损试验机等分析了中猛钢组织结构、力学性能。实验结果表明：BTW中锰钢均为单一的奥氏体组织，晶内晶界均有点状碳化物分布。锰含量对抗拉强度的影响较为明显，对硬度及磨损性能的影响较小。碳元素的变化对强度、韧性、硬度和耐磨损性能均有较为明显的影响。为获得良好的综合性能，在实际生产中锰含量应不低于8 wt%，碳含量应控制在0.9 wt%左右。

Abstract: The effect of C and Mn elements on properties of BTW steel was studied in this paper. Microstruc-tures and mechanical properties of medium manganese steel were analyzed by means of metallo-graphic microscope, tensile test, impact test, friction and wear test machines. Experimental results showed: in the experiment, the BTW steel was single austenite structure, in addition, the spotty carbonized precipitates were found in the crystalline grains and boundaries. Manganese made a more obvious effect on tensile strength, while the effect on hardness and wear properties was less. The change of carbon content had an obvious effect on strength, toughness, hardness and wear re-sistance. To obtain good comprehensive performance, the manganese content in actual production should not be less than 8 wt%. Carbon content should be controlled at around 0.9 wt%.