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在汽轮机增压器壳体和排气管等铸件的应用上,正在日益提高对铸铁高温工作能力的要求。铁素体高硅球墨铸铁具有引人瞩目的抗氧化性、组织稳定性和抗疲劳特性等良好的综合性能。在耐热铸铁中,尽管早已发挥了硅的作用,但高硅铸铁被广泛地用作复杂机件则只是最近的事。目前的经验为工业产品的不断发展奠定了基础。对于耐热铸铁,除了常温加工性能、强度和韧性的一般要求之外,还需要在工作温度下具有良好的抗氧化、抗生长和组织稳定等综合性能;在某些场合,热循环疲劳特性也可能是一个重要的因素。
In the application of turbocharger housings and exhaust pipes and other castings, the requirements for high-temperature working ability of cast iron are being increasingly raised. Ferritic high-silicon nodular cast iron with a remarkable antioxidant, tissue stability and anti-fatigue properties such as good overall performance. In heat-resistant cast iron, high-silicon cast iron, though widely used as a complex component, has long been the role of silicon, only recently. The current experience has laid the foundation for the continuous development of industrial products. For heat-resistant cast iron, in addition to the general requirements of the processing performance, strength and toughness at room temperature, it also needs to have a good overall performance of oxidation resistance, anti-growth and organizational stability at the working temperature; in some cases, the thermal cycle fatigue characteristics May be an important factor.