一种高锰奥氏体钢组织和力学性能

Microstructure and Mechanical Properties of a High Manganese Austenite Steels

研究了高锰奥氏体钢在室温及100℃条件下拉伸变形过程中组织变化。结果表明,高锰奥氏体钢在不同的拉伸变形条件下均产生了明显的塑性变形诱发马氏体相变(TRIP)效应,获得了较大的延伸率(60%～70%)和较高的抗拉强度(500～700MPa)。在10-3～10-1/s级别的初始应变速率范围内,实验钢对流变应力几乎不存在应变速率的敏感性。随着应变速率的增加,强度和塑性变化不大,由于该钢具有较好的综合机械性能,有望作为新一代高强度、高塑性汽车用钢。

The change of the microstructure and mechanical properties of the high manganese austenite TRIP steels under tensile tests at room-temperature and 100℃ were studied.The results indicated that the tested steel exhibits transformation induced plasticity(TRIP) under every conditions.It also exhibits high ultimate tensile strength (500~700 MPa) and extreme elongation (60%~70%).In the range of low and medium strain rates from 10-3/s to 10-1/s,nearly there is no strain rate sensitivity of the flow stress.The steel can be used on new generation motor because of the high-strength and the high-plasticity character.