【作者】 冯建情；

【导师】 曾建民；

【作者基本信息】 广西大学 ， 材料物理与化学， 2004， 硕士

【摘要】 高铝锌基合金是近几十年来国内外应用日益广泛的一种有色金属新材料，它具有良好的铸造性能、力学性能、抗磨损性能和低廉的制造成本等优点。目前，工业上已用其部分替代青铜、黄铜和巴氏合金等。但目前应用的锌基合金种类比较少，且只能在150℃下使用。本文比较全面地研究了不同含铝量高铝锌基合金的室温及高温(100～200℃)力学性能和摩擦磨损性能，对扩大其应用范围有很大意义。 试验利用材料试验系统、摩擦试验机、金相显微镜、图像分析软件等对五种不同含铝量的高铝锌基合金室温及高温下抗拉强度、延伸率、硬度及摩擦系数、减摩性、耐磨性等做了研究，并与ZQPbD合金做了比较。 试验结果表明：(1) 高铝锌基合金的组织为初生α′相枝晶和α与η相的共析体及少量ε相、Mn相、共晶体等。随着锌基合金中含铝量的增多，α′相枝晶增多，共析体减少。(2) 高铝锌基合金的室温及高温(100～200℃)力学性能随含铝量增加总的趋势在增加。(3) 室温时高铝锌基合金的摩擦和磨损性能随滑动速度的增加有所下降，ZQPbD合金的性能有所提高；100℃时，高铝锌基合金的摩擦磨损性能比ZQPbD合金差。高铝锌基合金在重载荷下摩擦性能优于ZQPbD合金。(4) 干摩擦时锌基合金摩擦磨损性能较差。所以高铝锌基合金在低速重载条件下具有较好的摩擦磨损性能，不适宜在干摩擦条件下工作。广西大学硕士学位论文 广西的有色金属资源丰富，特别是锌和铝。因此本文关于高铝锌基合金的研究对广西的资源利用和经济发展有着显著的意义。更多还原

【Abstract】 High Aluminum Zn-based alloys have been applied as a new kind of non-ferrous materials in recent decades. These alloys present good casting properties, good mechanical properties, excellent wear-resisting and low cost. Thus, they have been substituted for such wear-resisting materials as brass, bronze and babbitt metal. However, the kind of alloys applied at present is less and they service only under 150*0. The present work deals with the mechanical and friction-wear properties of different Al-content Zn-based alloys at room temperature and elevated temperature(100~200 1C)The tensile strength, elongation, hardness, friction coefficient and friction-wear performance of five different Al-containting high Aluminum Zn-based alloys were carried out on material testing system, abrasion testing machine, metallographic microscope and image-analyzer at room temperature and elevated temperature, and compared with ZQPbD alloys.The results show that: (1) The microstructure of alloys is composed ofdendrite a’ phase, eutectoid a + phase, phase, Mn phase andeutectic. The number of a ’ phase increase and eutectoid( a + ?)phase decrease with the increasing of Al-containing. (2) The mechanical properties of high Aluminum Zn-based alloys are improved with the increasing of Al-content both at room temperature and elevated temperature. (3) With increase of sliding speed at room temperture,The friction-wear properties of Zn-Al alloys drop, whereas the properties of ZQPbD alloys were improved. The friction-wear properties of Zn-Al alloys are worse than ZQPbD alloy at 100"C. (4) The friction-wear properties of Zn-Al alloys are not satisfactory under the condition of dry-friction. However, high Aluminum Zn-based alloys have more excellent friction-wear properties under low sliding speed and over-loading than ZQPbD alloy has.Guangxi is abundant in non-ferrous mineral resources, especially in Zinc and Aluminuml. So the present work is significant for the exploitation and utilization of resources as well as the development of economy in Guangxi.更多还原