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在用压制-烧结工艺制造粉末冶金零件中,Fe-Cu-C是最常用的合金系统。这个合金系统有许多优势;优异的力学性能,烧结性及可竞争的生产成本。可是,当最终客户要求成品零件的尺寸进行更精密控制时,由于这种合金内在的尺寸易变性,其是不易达到的。改变添加铜或钢合金的方法时,会影响这个合金系统的尺寸稳定性。这个工作研究了使用添加雾化铜粉,扩散合金化的Fe-Cu粉及化学粘结铜粉的方式添加铜时,烧结Fe-Cu-C钢的力学性能,尺寸及显微组织的差异。
Fe-Cu-C is the most commonly used alloy system in the manufacture of powder metallurgy parts by a press-sintering process. This alloy system has many advantages; excellent mechanical properties, sinterability and competitive production costs. However, when the final customer requests more precise control over the size of the finished part, it is not easily accessible due to the inherent dimensional variability of the alloy. Changing the method of adding a copper or steel alloy can affect the dimensional stability of the alloy system. This work investigated the differences in mechanical properties, size and microstructure of sintered Fe-Cu-C steels when copper was added by adding atomized copper powder, diffusion-alloyed Fe-Cu powder, and chemically bonded copper powder.