高压时效处理对耐磨高锰钢组织与力学性能的影响

Effects of High Pressure Aging Treatment on Microstructure and Mechanical Properties of Wear-resistant High Manganese Steel

在1~5 GPa压力下,对耐磨高锰钢进行550℃保温15 min的高压时效处理,采用OM、SEM、硬度测试和压缩试验等方法,探讨了高压时效对耐磨高锰钢的组织及力学性能的影响。结果表明,高压时效处理后高锰钢的组织为奥氏体、ε-马氏体和宽度为60~100 nm分布均匀的线状碳化物,避免粗大和网状碳化物的形成,有效提高了高锰钢的力学性能。经3 GPa压力550℃保温15 min高压时效后,高锰钢的硬度和抗压强度分别为51 HRC和3137 MPa,较常压时效后的分别提高27.5%和31.48%。

Wear-resistant high manganese steel was treated by high pressure aging treatment at 550 ℃ for 15min at 1-5 GPa pressure, and the effects of high pressure aging treatment on the microstructure and mechanical properties of wear-resistant high manganese steel were investigated by means of OM, TEM, hardness test and compress test. The results show that the structure of high manganese steel after high pressure aging treatment is austenite, ε-martensite and linear carbides with uniform distribution in the width of 60-100 nm, avoid the formation of coarse and network carbides, and the mechanical properties of high manganese steel are effectively improved. After treatment with 3 GPa pressure and 550℃ for 15min, the hardness and compressive strength of the alloy are 51 HRC and 3137 MPa respectively, compared with the normal pressure aging treatment, which is increased by 27.5% and 31.48%, respectively.