Abstract

The relation between the mechanical properties and the structural changes across the wall thickness is studied for hollow thin-walled castings made of gray cast iron with flaked graphite, which are formed by continuous cyclic freeze casting without the use of a rod. Ultimate tensile strength σ_u, HB Brinell hardness, HRB Rockwell hardness, and microhardness are determined in the zones of dendritic crystals and eutectic matrix. At the same Brinell hardness, σ_u of the castings made of the cast iron under study is shown to be significantly higher than that of the castings made of gray cast irons poured into sand–clay molds.

中文翻译：

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连续循环冻结铸造空心铸铁铸件的组织与性能。

摘要

研究了由灰口铸铁和鳞片状石墨制成的空心薄壁铸件的力学性能与壁厚变化之间的关系，该铸件是通过连续循环冷冻铸造而无需使用棒材制成的。极限拉伸强度σ _ü，HB布氏硬度，HRB洛氏硬度，以及显微硬度在枝状晶体和共晶基体的区域来确定。在同布氏硬度，Σ _ü所作研究中的铸铁铸件被示出为比由灰铸铁铸件的显著更高倒入砂-粘土模具。