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高锰钢传统的水韧处理工艺是将铸件加热至900～1100℃,然后入水淬火处理。这种水韧处理容易造成表面脱碳,使其含碳量由1.25～1.3％降为0％,深度可达2～3mm,锰也可氧化0.5～0.7mm,由于表面氧化层,使铸件在反复冲击负荷下,性能明显下降。为了避免高锰钢铸件因加热而产生的不利因素,采用铸态直接水淬工艺。即首先在熔炼中控制Mn/C≥10,这意味着锰的含量相对高,易于获得稳定的奥氏体组织,对钢的冲击韧性及塑性有利。在水韧处理过程中,关键是掌握时间而控制铸件入水温度。
High manganese steel traditional water toughening process is the casting is heated to 900 ~ 1100 ℃, and then into the water quench treatment. This toughness treatment is likely to cause decarburization on the surface, reducing its carbon content from 1.25 to 1.3% to 0%, to a depth of 2 to 3 mm, and manganese to 0.5 to 0.7 mm. Due to the surface oxide layer, Repeated impact load, the performance decreased significantly. In order to avoid unfavorable factors caused by the heating of high-manganese steel castings, the as-cast direct water quenching process is adopted. That is, the first control of Mn / C ≧ 10 in the smelting means that the content of manganese is relatively high, the stable austenite structure is easily obtained, and the impact toughness and plasticity of the steel are favorable. In the water toughening process, the key is to master the time and control the casting into the water temperature.