摘要:
介绍了用大型转炉生产22MnTiBRE钢的工艺及其产品性能,通过出钢前向钢包内加入200kg/炉的钙基脱氧剂,以及喂铝线,喂加包有Ca,Ba,RE,Si,C,F的复合包芯线来净化钢液。并采用浇注时吊挂稀土棒和光亮剂,解决了大型转炉生产的钢液氧含量高、钢液成分难以控制、大钢锭成分偏析大和普钢厂清理能力弱、钢材顶锻性能不易保证的问题,保证了齿轮钢的淬透性带宽度、晶粒度及清洁度,表明了用转炉加精炼工艺可以生产出优质齿轮钢。
Abstract:
The 22MnTiBRE gear steel produced by large converters and its associated production process and material properties are briefly introduced in this paper. The steel liquld is purified through an addition of 200kg/heat calcium deoxidizer to the ladle before tapping and feeding of aluminium wire and complex packed wire containing Ca,Ba,RE,Si,C and F after tapping.Besides,the method of hanging the RE rod and bright agent is adopted consequently,problems involved in the production of this steel by large converter have been solved,resulting in lower oxygen content in the steel liquid more consistent composition of steel liquid and large ingot,less finishing work and improved upsetting property of the steel. And gear steel with small variation in hardenability,fine grain and good cleaniness has been produced.
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