热处理工艺对超高锰钢组织与力学性能的影响

Effects of Heat Treatment Process on Microstructure and Mechanical Properties of Super-high Manganese Steel

摘要: 对铸态超高锰钢ZGMn18Cr2钢进行了3种热处理工艺试验，采用显微组织观察、硬度测试、冲击试验研究了不同热处理工艺对ZGMn18Cr2钢组织与力学性能的影响。结果表明：铸态ZGMn18Cr2钢的组织中有大量弥散分布的碳化物存在于晶内和晶界处。经过580℃保温1 h，再680℃保温2 h，最后1100℃保温2 h，水淬处理后，ZGMn18Cr2钢的组织为单一的奥氏体组织，且晶粒细小。ZGMn18Cr2钢的硬度、冲击吸收能量分别达到241 HB、117.2 J，综合力学性能最佳。

Abstract: Three heat treatment processes were carried out on as-cast ZGMn18Cr2 super-high manganese steel. The effects of different heat treatment processes on the microstructure and mechanical properties of ZGMn18Cr2 steel were studied by microstructure observation, hardness test and impact test.The results show that a large number of dispersed carbide exists in the as-cast ZGMn18Cr2 steel in the crystal and at the grain boundary. After 580 ℃ for 1 h, 680 ℃ for 2 h, and then 1100 ℃ for 2 h, after quenching, ZGMn18Cr2 steel has a single austenite structure, and the grain size is small. The hardness and impact absorption energy of ZGMn18cr2 steel are 241 HB and 117.2 J, respectively, and the comprehensive mechanial properties is best.