摘要金属间化合物在氧化和硫化环境中有出色的高温耐腐蚀性，同时具有低密 度、低成本等优点是一种极具应用前景的结构材料。而且，基于 D03 有序结构 的 Fe3Al 在铁铝合金中结构应用研究较为广泛。而 Fe3Al 具有良好的耐磨性， 是一种理想的摩擦制动材料，但是 Fe3Al 的室温脆性大等弊端限制其进一步应 用。因此，通过微合金化来改善其性能即添加合金元素 Cu 来研究 Fe3Al 基合金 的各项性能。83341

本文主要介绍了铜元素对 Fe3Al 合金机械性能以及摩擦学性能的影响。首 先，将铁粉、铝粉以及铜粉按照一定比例进行机械球磨使其充分混合，通过真 空烧结法制备 Fe3Al 基合金。接下来对 Fe3Al 基合金进行机械性能和摩擦学性能 测试，机械性能测试包括硬度、抗弯强度；摩擦学性能测试包括摩擦系数、磨 损率等。

试验结果表明，采用机械合金化结合真空热压烧结技术制备了 Fe3Al 合金以 及含有 Cu 的 Fe3Al 基合金。当未添加 Cu 时 Fe3Al 主要由 Fe3Al 相构成，且晶粒 大小为 10μm 级别。具有较好的硬度以及弯曲强度；对于 Fe3Al 基合金, Cu 的加 入影响其力学性能。本实验条件,含 6%Cu 的 Fe3Al 基合金的硬度以及强度有一定 的下降；Fe3Al-Cu 基合金的摩擦系数和磨损率都低于 Fe3Al 合金。Cu 使得 Fe3Al 合金的耐磨性得到改善,具有良好的摩擦学性能。

毕业论文关键词：金属间化合物；Fe3Al；力学性能；摩擦磨损

Abstract Intermetallic compounds have excellent high temperature corrosion resistance in the oxide and sulfide environment, and have the advantages of low density and low cost ,therefore they are a kind of extremely has the application prospect of structure material。 Moreover, Based on Fe3Al D03 orderly structure is structure which has been widely applied research of iron alloy, and Fe3Al has good wear resistance, friction brake material is a kind of ideal, but such as large room temperature brittleness of Fe3Al disadvantages limit its further application。 so, We through micro-alloyed to improve the performance of adding Cu element to investigate the performance of Fe3Al-based alloy。

This paper describes the copper alloy Fe3Al mechanical properties and tribological performance。 First, iron, aluminum and copper powder by mechanical ball milling fully mixed in certain proportions, Fe3Al-based alloy prepared by vacuum sintering。 Next of Fe3Al-based alloy by mechanical properties and tribological performance testing, mechanical testing includes hardness, compressive strength and bending strength; tribological tests includes coefficient of friction and wear rate。

Test results show that the mechanical alloying combining with vacuum hot-pressing sintering technique can prepare different Cu contents of Fe3Al-based alloy。 When without adding Cu powder, Fe3Al mainly consists of Fe3Al phase and grain size to 10 μ m level, and possess good hardness and bending strength; As for Fe3Al-based alloy, the addition of Cu could affect its mechanical properties。 In this study, the hardness and strength of Fe3Al-based alloy with 6% Cu has  a certain decline; the friction coefficient and wear rates of Fe3Al-Cu based alloy are lower than Fe3Al alloy。 Fe3Al-Cu based alloy’s wear resistance has improved, and has good tribological properties。

Keywords: Intermetallic compounds；Fe3Al；Mechanical properties；Friction and wear

目 录

第一章 绪论 1

1。1 课题背景 1

1。2 Fe-Al 金属间化合物的结构特点 2

1。3  研究现状 4

1。3。1 Fe-Al 金属间化合物的机械性能