phous structure. Te degree to which the amorphous crystal- line transformation takes place during different thermal conditions affects the shell’s thermal properties. Te transient


nature of the thermal properties of investment shells make precisely measuring them difficult. Tis study used an inverse method in which a shell mold with installed thermo- couples is poured with a pure liquid metal with well- defined properties.


，液ً金ষङਈ性 是ਈ性热ङד型 通过流ѽ动力学 拟模次ך）*,)（ ਸ定一֨，算ઋ并 չ率ح热Պ改ӄ֠ 热容量ङқ，努力 ҅ઋ算得ӱӒ却曲 ङў铸չד型Њি 实验Ӓ却曲িब一 ਚ。 逆է方法需要


ӱ得力努量םોਰ 适合ङ、Օ接Չङ 项这֨。ি曲却Ӓ ू९И，Одੂ得 更তेङ热性ਈ数


Fig. 4. Graphs show the comparison of Cp and K values determined by the inverse and improved laser flash methods: (a) shell #3; (b) shell # 4; (c) shell #5; and (d) shell #6.


March 2016 FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 51


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