适用于工业制造的烧结硬化解决方案

Sinter-hardening solutions for industrial manufacturing

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。

Sinter hardening of PM components is well known as a cost-effective and feasible alternative to second-ary heat treatment. Lots of application progress has been made in recent years. Nickel and molybdenum containing materials are very commonly used for sinter hardening application while increases and fluctuations in prices of nickel and molybdenum make manufacturers facing increased cost pressure. From this point of view,chromium-containing alloys show favorable prices and good hardenability,but limitations of atmosphere type and quality have influenced its wide application. To extend sinter hardening application and enhance competitiveness of PM technology,there is a strong need for cost effective alloys combined with robustness. Conventional and newly de-veloped lean alloys including both Ni-Mo and Cr-Mo systems,and their achievable properties and dimensional consistency as well as material selection solutions under industrial conditions for typical PM applications were pre-sented.