高锰钢结晶间隔窄(液相线为1400℃左右,固相线约为1350℃左右,只有50℃左右结晶间隔),钢水流动性好,然而由于线收缩大,因此必须以尽可能低的温度浇注,否则铸件易出现粗晶、粗大柱状晶和缩孔、疏松等缺陷。这样会使Ak值、耐磨性和抗热裂性均大幅度降低,此外组织中的碳化物数量也 High manganese steel crystallization interval is narrow (liquidus about 1400 ℃, about 1350 ℃ solid phase, only about 50 ℃ crystallization interval), the flow of molten steel is good, but because of the line contraction, it must be as low as possible Temperature pouring, or prone to coarse grain castings, coarse columnar crystals and shrinkage, porosity and other defects. This will greatly reduce the Ak value, wear resistance and thermal cracking resistance, in addition to the amount of carbides in the organization