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1、绪言一般来说,在高温范围,铸铁的利用受到限制。主要原因在于因加热导致抗拉强度等物理性质恶化及生长性和氧化性。笔者等报导了引人注目的金属型微细共晶状石墨铸铁的耐生长性与高强度,以及用添加Al的方法增加基体耐氧化性能可以制造新的耐热材料。另外找出这种铸铁材料是根据Al的石墨化促进作用能制造出来的不孕育、不刷涂料、没有激冷的金属型铸铁这是个非常有趣的结果。本文报导使C、Si及Al的组成变化,在不孕育,不刷底层涂料的金属型中浇注,然后根据铸铁组织的观察来探索为获得无激冷铸铁的最适合的Al添加量,同时也对含Al无激冷铸铁的机械性能进行了探讨。
1 Introduction In general, the use of cast iron is limited in the high temperature range. The main reason is due to heating lead to deterioration of physical properties such as tensile strength and growth and oxidation. The author reported the remarkable resistance to growth and high strength of the fine metallic eutectic graphite cast iron, as well as the addition of Al to increase the oxidation resistance of the matrix to create new heat-resistant materials. Also found out that this cast iron material is based on the role of Al’s graphitization can be created out of sterile, no paint, no chilled cast iron metal This is a very interesting result. This article reports changes in the composition of C, Si, and Al in cast-in-place, unprimed, metal-based molds and then explores the most suitable Al addition for unchromized cast iron based on cast iron microstructure, The mechanical properties of Al-containing non-chilled cast iron were discussed.