Stamenković D
Stomatol Glas Srb. 1989 Mar-May;36(2):85-93.
The following hypothesis was made: different conditions of preparation and heat treatment of refractory mold change its physical and mechanical characteristics which is of great importance for the precision of casting of Co, Cr, Mo alloys. To prove this hypothesis measurements of setting time, setting and thermal expansion and transverse strength were performed regarding the relationship between the powder and the liquid of investment. The research was carried out on "Politerm C", "Rema Exakt" and "Widerit" investments. The obtained results proved the hypothesis that different conditions during the preparation of refractory mold had a certain influence on the quality of casting of Co, Cr, Mo alloys. The domestic investment was approximately of the same quality as the tested investments of foreign origin.
耐火模具的不同制备条件和热处理会改变其物理和机械特性，这对于钴、铬、钼合金铸造的精度非常重要。为了验证这一假设，针对包埋材料的粉末与液体之间的关系，对凝固时间、凝固和热膨胀以及横向强度进行了测量。研究是在“Politerm C”、“Rema Exakt”和“Widerit”包埋材料上进行的。所得结果证实了这一假设，即耐火模具制备过程中的不同条件对钴、铬、钼合金的铸造质量有一定影响。国产包埋材料的质量与测试的国外同类包埋材料大致相同。
