在Instron材料试验机上对纯铁粉和添加了不同润滑剂的铁粉致密化过程进行了研究;用扫描电镜观察了铁粉的形貌,用X射线衍射方法测试了压坯中铁粉晶粒(110)晶面衍射峰的半高宽,并测定了粉末的氧含量和压坯的显微硬度.结果表明:在不同的压制压力下,纯铁粉在室温压制时的压坯密度均高于130℃时压制的,其室温时的(110)面衍射峰半高宽也高于同样压力下130℃时压制的;在室温压制时,添加硬脂酸锌的铁粉在不同压力下的压坯密度均高于添加WSA的铁粉;而添加了硬脂酸锌和WSA的铁粉在130℃压制时,其压坯密度高于同样压力下室温压制时的;此外,纯铁粉在温压时,其粉末颗粒的加工硬化程度增加;而添加了润滑剂的铁粉在温压时塑性变形能力提高,减缓了压坯加工硬化的趋势.
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