Title: Dephosphorization technology for low phosphorous and extra-low phosphorous high chromium stainless steel
Application Number: 85101003 Application Date: 1985.04.01
Publication Number: 1002150 Publication Date: 1986.08.06
Approval Pub. Date: Granted Pub. Date: 1989.07.05
International Classifi-cation: C21C7/064
Applicant(s) Name: General Design and Research Inst., Ministry of Mac Address:
Inventor(s) Name: Gao Feng, Yu Yuhong
Attorney & Agent: ZHAO DINGDE
Abstract:
     This invention utilizes a spraying metallurgy technology in which powder of alkali metals or alkali-earth metals and their alloys is sprayed into the high chromium stainless steel melt in a ladle or ladle refiner to effect dephosphorization. Under industrial conditions, the dephosphorization rate reaches 71-89% and phosphorus content of the steel can be reduced to 0.005%. In this way low phosphorus or extra-low phosphorus high chromium stainless steel can be produced by using normal recycle high chromium stainless steel or chromium ferro alloy.
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