...高级铸铁 high class cast iron; high duty cast iron; high grade cast iron; high quality cast iron; high test cast iron; high-grade cast iron; high-quality cast iron; high-test cast iron; high-testcastiron; semisteel; up grade cast iron 一级铸件 primary quality casting .
In the process of rough rolling, the alloy semisteel was chosen, and the unlimited chrome and molybdenum chilled iron roll material was used in the process of fine rolling.
在粗轧阶段选用了合金半钢材料轧辊，在精轧阶段选用了铬钼无限冷硬铸铁材料的轧辊。
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The recovery quantity of converter gas got increased in semisteel steelmaking process by means of optimizing oxygen feeding, improving operation level, reforming gas recovery system.
Using carburizing agent and devulcanized agent, experiment of carburisation and desulphuration for semisteel which in smelting high titanium slag by electric cooker has been studied.