前言 稀土-镁球墨铸经过几年的实践证明,是一种延长机器寿命、性能良好的材料能用以代替锻钢、铸铁,是一种有很大发展前途的材料。 我国的稀土元素蕴藏量相当丰富;充分利用这些自然资源,加速我国社会主义建设,赶超世界先进水平,具有重大的政治意义和经济意义。为此,国家科委对稀土元素的应用极为重视, Introduction The rare earth-magnesium ball-casting has been proved through several years of practice that it is a kind of material that can extend the life of a machine and has good performance. It can be used to replace forged steel and cast iron. It is a material with great development prospects. China’s reserves of rare earth elements are quite abundant; making full use of these natural resources, accelerating China’s socialist construction and catching up with the world’s advanced level has great political and economic significance. To this end, the State Science and Technology Commission attaches great importance to the application of rare earth elements.