铸钢生产时,为了及时补缩要在“热节”区上设置冒口,其重量几乎等于铸件的自重,即工艺出品率只有50％左右,严重影响铸钢件的生产率与成本。国外现在已广泛应用各种绝热型和发热型的保温冒口,大大提高了工艺出品率,降低了生产的成本,节约了能源和劳动工时。 为研究试制出我国的保温冒口,北京市经委组织了我院及有关单位厂校协作,通过对高温下传热现象的研究,探讨了原材料结构特点、工艺因素及各种材料在冒口中传热的 Casting steel production, in order to timely shrink in the “heat” zone set riser, the weight is almost equal to the weight of the casting, that is, craft production rate of only about 50%, seriously affecting the productivity and cost of steel castings. Foreign countries have now widely used a variety of thermal insulation and heat-type riser, greatly improving the rate of technology produced, reducing the cost of production, saving energy and man-hours. In order to study and test out the insulation riser of our country, Beijing Municipal Economic Commission organized the cooperation between our institute and the related institutes and schools. Through the research on the heat transfer phenomenon under high temperature, the characteristics of raw material structure, technological factors and various materials in the riser hot