一、前言在高合金钢尤其是不锈钢铸造中,采用保温冒口技术,具有特殊的迫切性与重要意义。从经济效果上看,它可大大提高昂贵钢水的利用率,明显降低成本。从工艺角度上看,由于冒口横截面尺寸减小,便于切割;改善了铸型的热应力分布,减少开裂;同时也降低了Cr、Ni元素的重熔损耗。本文拟针对制造18000kW轴流式水轮机组和11000kW蓄能水轮机组所需的0Cr13Ni6Mo不 First, the preface High alloyed steel, especially stainless steel casting, the use of thermal insulation riser technology, with special urgency and significance. From the economic point of view, it can greatly improve the utilization of expensive molten steel, significantly reduce costs. From a process point of view, due to riser cross-sectional size decreases, easy to cut; improve the thermal stress distribution of the mold to reduce cracking; also reduces the remelting loss of Cr, Ni elements. This paper is intended for the manufacture of 18000kW Axial Turbine and 11000kW storage turbine required 0Cr13Ni6Mo not