根据磁性衬板对奥氏体钢超高硬度的研发需求,在高锰奥氏体钢中添加适量的碳化物形成元素,经热处理的后采用TEM、SEM、XRD等手段研究了固溶时效态高锰奥氏体钢中碳化物的析出行为,以期获得超高硬度奥氏体钢。结果表明:高锰奥氏体钢在固溶时效状态下,组织中均匀析出大量Cr23C6相,其数量在675℃时效时达到饱和,随后开始长大聚集;时效使材料中大量弥散析出约十几纳米的VC颗粒,弥散的VC颗粒与基体间存在共格界面,存在多种共格关系,这种具有共格界面的纳米VC颗粒对材料硬度提高作用非常明显。 According to the research and development of super high hardness of austenitic steel with magnetic backing plate, adding the appropriate amount of carbide forming elements into the high manganese austenitic steel, and the heat treatment, TEM, SEM, XRD and other means to study the solution aging state High manganese austenitic steel carbide precipitation behavior, in order to obtain ultra-high hardness austenitic steel. The results show that a large amount of Cr23C6 phase precipitates homogeneously in high-manganese austenitic steels at solution-aging condition, and the amount of Cr23C6 phases reaches saturation at 675 ℃ aging, and then begins to grow and aggregate. Nano-VC particles, dispersed VC particles and the matrix exist coherent interface, there are a variety of coherent relationship, this has a coherent interface of the nano-VC particles on the hardness enhancement effect is very obvious.