【摘要】 研究了Ｚｎ－２５％Ａｌ－Ｘ％Ｃｕ合金的力学性能和在油润滑条件下的耐磨性。研究发现，随着Ｃｕ含量升高，该合金的抗拉强度逐渐升高，并在Ｃｕ含量达到６．６４％时达到最大值３６９ＭＰａ；伸长率在Ｃｕ含量为２．２４％时达到最大值１４．１％，Ｃｕ含量超过２．２４％后，随Ｃｕ含量升高，延伸率逐渐下降；硬度的变化与伸长率的变化相反，Ｚｎ－２５％Ａｌ－２．２４％Ｃｕ的硬度最低（ＨＢ９８）。在Ｚｎ－２５％Ａｌ－０．６２％Ｃｕ合金的枝晶间未见到ε（ＣｕＺｎ４）相，随着Ｃｕ含量升高，合金中的ε相增多，其耐磨性逐渐升高。更多还原

【Abstract】 The mechanical properties and wear resistance in the oil lubricated condition for alloys Zn25%AlX%Cu were studied. It was found that with increasing of the copper content ultimate tensile strength of alloys gradually increased up to the maximum value 369 MPa with the copper content 6.64% while the elongation of the alloy Zn25%Al2.24%Cu had the maximum value 14.1% with 2.24%Cu. The elongation of alloys decreased in an excess above 2.24% copper. The hardness change of alloys was opposed to the elongation variation and the hardness of the alloy Zn25%Al2.24%Cu had the minimum value (HB98). No εphase appear in interdendrite zones of the alloy Zn25%Al0.62%Cu, but εphases appeared in interdendrite zones of the alloy Zn25%Al2.24%Cu and increased with increasing of the copper content. With increasing of the copper content the wear resistance of alloys gradually increased.更多还原