【摘要】 研究了20％Cu＋2％Sn＋Fe预合金青铜包覆铁粉末体的烧结行为及特性，并与相近成份的混合粉末体的烧结行为及性能进行了对比。发现预合金青铜包覆铁粉末的烧结行为与混合粉末的烧结行为相反，后者表现为体积膨胀，而前者表现为体积收缩。分析了产生这一现象的机理及相应外性能特点。更多还原

【Abstract】 The sintering behavior and properties are studied in this paper on the prealloyed bronze --coated iron powder which contains 20%Cu, 2%Sn and 78%Fe. It is in contrast with mixed powder which has the approximate composition. A discovery has been made that prealloved powdr specimens contract during sintering. On the contrast,the specimens of mixed powder expand,The mechanism is analyzed and some conclusions have been drawn.更多还原