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一、前言二、粉末冶金材料的工程性能三、铁基粉末冶金材料及其发展现状1.铁基材料中的合金元素近五十年来,铁基材料或烧结钢的机械强度有了很大的提高。抗拉强度由15～20kgf/mm~2提高到180～190kgf/mm~2。提高强度的途径:一是改进铁粉质量,使铁粉具有更好的可压缩性能,增加压坯、烧结后的密度,二是加入合金元素,强化基体和热处理后的机械性
First, the foreword Second, the performance of powder metallurgy materials Third, iron-based powder metallurgy materials and its development status 1. Alloying elements in iron-based materials In the past 50 years, the mechanical strength of iron-based materials or sintered steel has been great improve. Tensile strength increased from 15 ~ 20kgf / mm ~ 2 to 180 ~ 190kgf / mm ~ 2. The ways to improve the strength: First, improve the quality of iron powder, make the iron powder have better compressibility, increase the compaction, the density after sintering, the second is to join the alloying elements, strengthening the matrix and the mechanical properties after heat treatment