关于不锈钢精炼的过程模型与质量控制

Refining Process Models and Quality Control of Stainless Steel

近年来中国不锈钢的产量及国内市场消费量均已达世界第一,2009年不锈钢产能为1 400万t,其中先进装备产能达到70%以上,产业集中度要高于其他钢铁产品。然而在精炼生产过程控制、产品质量方面,与国外仍有一定的差距。鉴于此,介绍了国内外不锈钢精炼的数学、物理及过程控制模型,讨论了不锈钢中非金属夹杂物的形成机制及其在精炼、连铸过程的控制,并对国外生产洁净不锈钢以及铁素体不锈钢中的C、N控制、奥氏体不锈钢中的T[O]含量控制以及430系不锈钢中夹杂物控制及精炼时最佳搅拌强度也进行了讨论。

Stainless steel industry in China has made rapid progress in the last decade,the output and domestic apparent consumption of stainless steel all rank first in the world,and the manufacturing capacity of stainless steel has reached 14 million tons in 2009,especially more than 70% of which are well equipped.But there also exist some technological gap at product quality and refining process control,compared with developed countries.This paper mainly introduced several mathematical and physical models of stainless steel refining both at home and abroad,discussed the forming mechanisms and the control methods of the non-metallic inclusions in stainless steel during refining and continuous casting process,the methods of lowering C and N content in ferritic stainless steel,the total oxygen content control in austenite stainless steel,the relationship between optimum stirring intensity in refining process and inclusion control in stainless steel series 430 also been discussed.