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| 稀土元素对AgCuNi合金材料组织性能影响研究 |
| Study the Influence of Rare Earth Elements on Microstructure and Property of AgCuNi Alloy |
| 投稿时间：2019-10-11 |
| DOI： |
| 中文关键词: AgCuNiRE合金 显微组织 第二相球化 强化 耐磨性 |
| 英文关键词: AgCuNiRE alloy microstructures second-phase spheroidization strengthen wear resistance |
| 基金项目:国家重点研发计划(2017YFB0305700)、国家自然科学基金(U1602275，U1602271)；云南省重大科技专项(2018ZE011， 2018ZE012，2018ZE022，2018ZE026) |
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| 中文摘要: |
| 银铜镍系合金主要用作直流微电机换向器材料。采用金相显微镜(OM)、扫描电镜(SEM)、显微硬度仪、拉力试验机，以及真空熔炼等分析技术手段，研究了La、Ce等稀土元素对Ag-4Cu-0.5Ni0.5合金组织和性能的影响。结果表明，混合稀土的加入可对合金的显微组织进行细化和第二相球化，产生细晶强化和弥散强化的作用，合金的硬度、强度、摩擦磨损性能得到进一步地提高，有助于改善合金材料的耐磨性。 |
| 英文摘要: |
| Ag-Cu-Ni alloys are mainly used in DC micromotor as the commutator materials. The influence of La and Ce on the structure and properties of Ag-4Cu-0.5Ni alloy was studied by means of metallographic microscope (OM), scanning electron microscopy (SEM), microhardness tester, tension tester and vacuum melting. The results show that the addition of mixed rare earth elements can refine the microstructures and spheroidize the second phase of the alloys, resulting in fine grain strengthening and dispersion strengthening. The hardness, strength and friction and wear properties of the alloys are further improved, which is helpful to improve the wear resistance of the alloys. |
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