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为了提高动叶片的抗冷热疲劳和抗机械疲劳的性能 ,铸件表面需进行晶粒细化。通常是在熔模铸造表面涂料中加入一定量晶粒细化剂 ,靠金属液与面层涂料中的细化剂相互作用而使铸件表面晶粒细小。着重论述了氧化钴孕育剂的形成机制及氧化钴孕育剂的精铸工艺及金相分析
In order to improve the thermal resistance of hot and cold blades and mechanical fatigue resistance performance, the casting surface to be refined grain. Usually in the investment casting surface paint by adding a certain amount of grain refiner, by the liquid metal and the surface coating of the refiner in the interaction of the casting surface of fine grain. The formation mechanism of cobalt inoculant and the casting technology and metallographic analysis of cobalt inoculant are emphatically discussed