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1前言TAS－A铁合金是在TAS牌号的基础上发展起来的一种特殊用途的合金，它与普通型TAS合金的主要区别在于材料的主要化学成分与工艺性能高于TAS合金；可以说TAS－A合金是高性能的TAS．虽然80年代至如年代对该合金作过不少厚板的工艺试验，但一直存在着厚板力学性能等指标低于国
1 Introduction TAS-A ferroalloy is a special-purpose alloy developed on the basis of TAS grades. The main difference between TAS-A ferroalloy and ordinary TAS alloy is that the main chemical composition and technological properties of the material are higher than that of TAS alloy. It can be said that TAS- A alloy is a high performance TAS. Although the 80’s to the age of the alloy made a lot of plate technology test, but there are still indicators such as plate mechanical properties lower than the