一、前言由于社会需求的多样化,以及能源危机、资源缺乏和环境污染等问题的日益尖锐,各工业国都加紧了技术改革工作。如开发新能源,改造化学工业,加强工业和生活废弃物的综合利用等等。为此必须有许多高效优质的机械设备和材料。这就是说,与优质材料的零件成形有关的新加工技术的发 I. Preface Due to the diversification of social needs and the increasingly acute problems of energy crises, lack of resources and environmental pollution, all industrialized countries have stepped up their efforts in technological reform. Such as the development of new energy sources, transform the chemical industry, and strengthen the comprehensive utilization of industrial and domestic waste and so on. To do this there must be many efficient and superior machinery and materials. That is to say, the development of new processing techniques related to the shaping of parts of high-quality materials