Study of Resin - bonded・Calcia Investment Part 3 : Hardness of Yukun MENG , Akira NAKAI , Shinichi GOTO and Hideo OGURA
نویسندگان
چکیده
analyzed using an EPMA. The results showed that the high hardness of the casting surface eould be decreased using the experimental investment. The hardness of the castings made from the experimental investment at a 25-50"m depth was lower than these frem the other investments, and the thickness of the hardened casting surface was 125/im. Layered structures with fewer layers were formed on the surfaces of the castings made from the experimental investment. The layered structures were influenced by both the investment components and the mold temperature at casting. The less contaminating nature of the experimental investment components and the technology of the reom temperature mold contributed to the improved surface properties of the resulting castings.
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