前言莱氏体钢和碳化物铸铁目前使用很成功,在机械制造,动力工业、车辆制造,很多矿石的选矿工艺中作为结构件用得越来越多,而抗磨粒磨损性很高的经过热处理的莱氏体钢和高格铸铁又特别引人注目。这种材料的缺点是有明显高的脆性。本文对脆性起主要作用的材料化学成份详加研究,并还专门指出了避免脆性的可能性。 Preface Leaded steel and carbide cast iron are currently used very successfully and are being used as structural parts in the mechanical manufacturing, power engineering, vehicle manufacturing, and many ore beneficiation processes with increasing wear resistance Heat-treated ledeburite and cast iron are particularly attractive. The disadvantage of this material is the markedly high brittleness. In this paper, the chemical composition of the material that plays a major role in brittleness has been studied in detail, and the possibility of avoiding brittleness has also been specifically pointed out.