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在异步轧制条件下,研究了高锰钢的显微组织变化及其加工硬化机制。结果表明,经异步轧制后,随着变形量的增大,高锰钢中滑移带的密度逐渐增大;高锰钢晶粒内部出现大量的形变孪晶和高密度位错缠结,晶粒细化明显;高锰钢晶体在变形后仍然为面心立方的奥氏体,没有发生马氏体相变;在不同的变形量下,高锰钢中主要的加工硬化机制不同。
Under the condition of asynchronous rolling, the microstructure of high manganese steel and the mechanism of work hardening were studied. The results show that with the increase of deformation, the density of slip band in high manganese steel increases gradually after asynchronization rolling. A large amount of deformation twins and high density dislocation entanglement occur in the grain of high manganese steel, The grain refinement is obvious. The high manganese steel is still face-centered cubic austenite without martensite transformation under different deformations. The main work-hardening mechanisms of high manganese steel are different under different deformations.