阅读说明：本技术 熔模粉末 (Investment powder ) 是由 S·R·古德温 M·G·帕林 于 2020-03-26 设计创作，主要内容包括：一种比传统粉末更安全的熔模粉末,包含磷酸三钙,并且在呼吸部分中基本上或完全不含游离二氧化硅,但提供750℃下1％或更高的总膨胀,足以防止铸造期间模具开裂。一种制造铸件的方法,包括：通过将石膏粘合熔模粉末与水混合形成浆料,将浆料围绕低熔点材料模型倒入不锈钢烧瓶中,让浆料凝固以限定模具,加热模具以燃尽模型和将材料浇铸到模具中,其中不锈钢烧瓶由400系列马氏体不锈钢组成。(An investment powder that is safer than conventional powders, comprises tricalcium phosphate and is substantially or completely free of free silica in the breath portion, but provides a total expansion of 1% or more at 750 ℃ sufficient to prevent mold cracking during casting. A method of making a casting, comprising: the method includes forming a slurry by mixing gypsum-bonded investment powder with water, pouring the slurry around a low-melting material pattern into a stainless steel flask, allowing the slurry to set to define a mold, heating the mold to burn off the pattern and casting the material into the mold, wherein the stainless steel flask consists of a 400 series martensitic stainless steel.)