在冶炼含稀土Ce的2Cr13不锈钢时采用Fe-Ce中间合金代替纯Ce以获得较满意的收得率,然后对试样进行锻造及热处理,最后通过对试样进行显微组织观察及析出相的成分分析,来研究稀土Ce的残留量及对2Cr13不锈钢组织的影响。结果表明：添加Fe-Ce中间合金可以使2Cr13不锈钢中稀土的收得率达35%以上。稀土Ce的加入影响Fe-Fe3C相图中各相区的位置,在相同的淬火加热温度下出现了铁素体组织,并且含Ce量越多,得到的铁素体组织越多。Ce还可以有效减少钢中碳化物的偏聚和析出。
In order to get the appropriate residual amount of cerium and examine the impact of residual amount of cerium on microstructure of 2Cr13 stainless steel, Fe-Ce intermediate alloys rather than pure Ce were added in the 2Cr13 stainless steel in smelting, then the steel was forged and heat treated. Microstructure of the samples was observed and composition of precipitation phases in the samples were analyzed, and effect of Ce content on microstructure of the steel was studied. The result shows that the method of adding Fe-Ce intermediate alloys in 2Cr13 stainless steel can make the rare earth yield reach over 35%. Rare earth Ce added in 2Cr13 stainless steel influences the phase diagram of Fe-Fe3C system, which makes the ferrite precipitation at the same quenching temperature, and the more the addition of Ce, the greater content of ferrite. Ce also can effectively reduce the carbide segregation and precipitation in the steel.
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