攀钢汽车用优质钢的开发
DEVELOPMENTS OF QUALITY STEEL SUSED FOR MOTOR VEHICLES AT PANGANG
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摘要: 介绍了攀钢用120t大型转炉生产20CrMnTi，40MnB，60Si2Mn，55SiMnVB钢的工艺及性能。通过采用出钢前向钢包内加入钙基预脱氧剂、喂铝线、喂复合包芯线处理钢液，以及对铬铁合金化工艺进行改进等技术措施，解决了钢的成分控制问题，保证了钢材的淬透性和清洁度，生产出的20CrMnTi，40MnB，55SiMnVB等钢种为汽车用优质钢。Abstract: The technological process and the properties of 20CrMnTi, 40MnB, 60Si2Mn, and 55SiMnVB steels smelted in Pangang 120 ton converter are described. The problem of control of chemical compositions of steels is solved through the technical measures of ladle refining, i.e. calciumbase Pre-doxidizer addition, aluminium wire feeding and complex cored wire feeding into molten steel in ladle before steel tapping and the technical improvement of Fe-Cr alloying process.As aresult, the required harden ability and cleanness of steels are ensured.The 20CrMnTi, 40MnB, 60Si2Mn, steels are perfectly suitable to use in automobile industry.
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Key words:
- converter /
- quality steels /
- hardenability /
- cleanness
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