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| 温度对Au-9Ni合金电刷丝力学性能的影响研究 |
| Effect of Temperature on the Mechanical Performance of Au-9Ni Slipring Brushes |
| 投稿时间：2016-08-23 |
| DOI： |
| 中文关键词: 金属材料 Au-9Ni合金 温度循环 力学性能 蠕变 |
| 英文关键词: metal materials Au-9Ni alloy thermal cycling mechanical property creep |
| 基金项目:云南省科技创新人才计划项目(2015HC034)、云南省应用基础研究重大项目(2016FC006)。 |
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| 中文摘要: |
| 测定了Au-9Ni合金在不同热处理状态下的预变形刷丝在高低温循环处理过程中的接触压力变化，研究了不同温度下刷丝蠕变速率变化。结果表明，刷丝成型后在330~350℃温度区间内进行时间为30 min的退火能够消除成型加工造成的应力集中；在-50~150℃的温度循环过程中，电刷的压力随循环次数的增加而减小，约1000个循环后进入稳定期；模拟结果表明，112000次循环后压力降低约20%；在恒温恒压环境中，150℃刷丝基本不产生变形，250℃刷丝慢慢变形但幅度较小，350℃蠕变率极高。 |
| 英文摘要: |
| Thechange in the contact pressure and creep rate of Au-9Ni alloy brushes under different heat treatment conditions were studied. The result indicated that the stress concentration of the brushes as a result of the forming procedure could be reduced by annealing at 330~350℃ for 30 minutes. In the process of thermal cycling at -50~150℃, the contact pressure of the brushes decreased with the increase of the cycle number, and reached a steady state after about 1000 cycles. The simulation results demonstrated that the pressure dropped by about 20% after 112000 cycles. In a constant temperature and pressure environment, the brushes did not deform at 150℃ and deformed slowly and slightly at 250℃, but deformed severely with a high creeping rate at 350℃. |
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