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在粉末冶金零件生产中,烧结硬化被认为是替代后续热处理工序的一种经济易行的方案。近年来烧结硬化材料和工业应用已取得很大进展,其中Ni和Mo是最常用的合金元素,然而Ni和Mo价格的增长和剧烈波动使制造商面临巨大的成本压力。含Cr合金材料虽然具备合理的价格和良好的淬硬性,但对烧结气氛类型和质量的严格要求限制了其更广的应用。为拓宽烧结硬化的应用范围和增强粉末冶金工艺的竞争优势,市场强烈需求同时具备成本效益和高度稳定性的合金材料。通过在工业条件下生产典型的粉末冶金零件,对比了Ni-Mo和Cr-Mo体系的传统粉末冶金材料与新开发的低合金材料的力学性能以及尺寸稳定性,从而给出适应不同工业生产条件的材料选择方案。
In the production of powder metallurgy parts, sinter hardening is considered to be an economical alternative to subsequent heat treatment processes. In recent years, great progress has been made in sintering hardened materials and industrial applications, with Ni and Mo being the most commonly used alloying elements. However, the price increases and the drastic fluctuations of Ni and Mo have placed manufacturers under enormous cost pressures. Although Cr-containing alloy materials have reasonable prices and good hardenability, the strict requirements on the type and quality of the sintering atmosphere limit their wider application. In order to broaden the application range of sinter hardening and enhance the competitive edge of powder metallurgy, there is a strong demand for alloy materials that are both cost-effective and highly stable. The mechanical properties and dimensional stability of the conventional powder metallurgy materials of Ni-Mo and Cr-Mo systems and the newly developed low-alloy materials were compared by producing typical powder metallurgy parts under industrial conditions, Material selection scheme.