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研究了一种新型含硼低碳高锰合金并讨论了热处理对其组织的影响。研究表明,合金铸态组织由铁素体基体(少量残留奥氏体)、M2B硼化物、M23(C,B)6以及Ti(C,N)相组成,且硼化物呈断续网状分布;高温淬火后基体并没有发生马氏体相变,基体中残留奥氏体的含量增加,硼化物因部分溶解体积分数减少,且硼化物的分布更加弥散。从热力学角度分析了热处理对合金组织的影响。
A new boron-containing, low-carbon, high-manganese alloy was studied and the effect of heat treatment on its microstructure was discussed. The results show that the as-cast microstructure of the alloy is composed of ferrite matrix (a small amount of retained austenite), M2B boride, M23 (C, B) 6 and Ti (C, N) After quenching, the matrix did not undergo martensitic transformation, the content of retained austenite in matrix increased, the content of boride decreased due to the partial dissolution volume fraction, and the distribution of boride was even more dispersed. The effect of heat treatment on the microstructure was analyzed from the viewpoint of thermodynamics.