用于耐火砖模具的空心芯棒近几年来，高铬高碳多元素合金耐磨铸铁的应用范围越来越广泛。用该铸铁与３０“铸钢复合制作的圆管砖模套，可取代紧俏厚壁无缝钢管制作的模套，而且使用寿命是无缝钢管碳氮共渗模套的６倍。但是，与模套相配套的芯棒所采用的材料基本上是圆钢或... Hollow mandrel for refractory brick mold In recent years, the high-chromium high-carbon multi-element wear-resistant cast iron alloy is more and more widely used. With the cast iron and 30 "cast steel pipe made of composite pipe die sets, can replace the thick thick-walled seamless steel pipe production of die sets, and the service life of seamless steel pipe carbonitriding 6 times. However, with Die matched core rod material used is basically round bar or ...