球鐵軋輥凝固過程中的計算機模擬

Computer Simulation of Volumetric Changes of Ductile Cast Iron Rolls during Solidification

摘要: 采用直接差分方法對球墨鑄鐵軋輥凝固過程中不同時刻的溫度場進行計算機模擬。在此基礎上對不同時刻的體積變化也進行了模擬。利用計算機模擬可以定量地、準確地揭示出球鐵軋輥凝固過程中體積變化的動態過程,為球鐵軋輥無冒口鑄造工藝提供了科學根據。試驗表明,在計算機幫助下,采用無冒口鑄造能可靠地生產出無縮孔、無縮松的致密球墨鑄鐵軋輥。

Abstract: A computer program to simulate the temperature distribution and the volumetric changes occuring in ductile iron rolls during solidification is presented. Direct finite-difference method has been used to calculate the temperature distribution. With the help of computer modelling a new technique for producing riserless ductile iron roll castings has been developed and a perfect sound ductile iron roll castings without riser has been produced.