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本文使用彩色金相法,研究了Cr12钢中的共晶碳化物,发现共晶碳化物不是单相的(CrFe)_7C_3而是由(CrFe)_7C_3、(FeCr)_3C及少量的r相(残余奥氏体)组成。同时发现共晶碳化物上存在着微裂纹。
In this paper, the eutectic carbides in Cr12 steel were studied by color metallographic method. It was found that the eutectic carbides are not single-phase (CrFe) _7C_3 but (CrFe) _7C_3, (FeCr) _3C and a small amount of r phase Body) composition. Also found on the eutectic carbide microcracks.