摘要
蒂森克虏伯AST厂采用新单罐150 t VD/VOD,通过EAF-AOD-VOD三步工艺试制了409LI、439M、460LI以及470LI等4个级别不含Ni和Mo的超纯铁素体不锈钢。生产实践表明,采用EAF-AOD-VOD三步工艺比EAF-VOD两步工艺明显减少处理时间,实现了低成本生产超纯铁素体不锈钢的工艺目标,所生产的新一代超纯铁素体不锈钢AST460LI(%:≤0.010C、21.0～21.4Cr、≤0.002S、0.10～0.20Ti)和AST470LI(%:≤0.007C、23.8～24.2Cr、≤0.002S、0.10～0.20Ti)的耐蚀性和耐高温性能均优于标准奥氏体不锈钢304(%:≤0.08C、8.0～11.5Ni、18.0～20.0Cr)和316(%:≤0.08C、10.0～14.0Ni、16.0～18.0Cr、2.0～3.0Mo)。
Four grades of super-purifying ferritic stainless steel 409LI, 439M, 460LI and 470LI without containing Ni and Mo are pilot-produced by using a new 150 t VD/VOD unit with EAF-AOD-VOD three steps process at AST, ThyssenKrupp. Production practice shows that the refining operation cycle time of EAF-AOD-VOD three steps process is obviously less than that of EAF-VOD two steps process to realize the process goal for production of super-purifying ferritic stainless steel with low cost; and the corrosion resistance and heat resistance of produced new generation super-purifying ferritic stainless steel AST460LI （% ： ≤0. 010C, 21.0 -21.4Cr, ≤0. 002S, 0. 10 -0. 20Ti） and AST470LI （% ： ≤0. 007C, 23.8 -24. 2Cr, ≤0. 002S, 0. 10-0. 20Ti） are higher than that of standard austenitic stainless steel 304 （% ： ≤0. 08C, 8.0-11.5Ni, 18.0-20.0Cr） and316 （%： ≤0.08C, 10.0-14.0Ni, 16.0-18.0Cr, 2.0-3.0Mo）.
出处
《特殊钢》
北大核心
2011年第2期18-20,共3页
Special Steel
