Research and Application of Eco-friendly Materials in Investment Precision CastingI. IntroductionAs a manufacturing process for high-precision and complex-shaped parts, investment precision casting is widely applied in aerospace, medical equipment, automobile manufacturing and other fields. With the improvement of global environmental awareness and the proposal of the "carbon peaking and carbon neutrality" goals, the environmental pollution caused by traditional casting materials has become increasingly prominent. The development and application of eco-friendly materials have become an important development direction of the investment precision casting industry. This paper systematically introduces the currently applied eco-friendly materials in investment precision casting and their characteristics.II. Eco-friendly Mold Shell Materials1. Water-soluble Pattern MaterialsTraditional wax-based pattern materials produce a large amount of organic waste gas during dewaxing, while...