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    李晓燕, 王顺兴, 田保红. 稀土元素对铜-铬触头材料显微组织和电击穿性能的影响[J]. 机械工程材料, 2008, 32(11): 69-71.
    引用本文: 李晓燕, 王顺兴, 田保红. 稀土元素对铜-铬触头材料显微组织和电击穿性能的影响[J]. 机械工程材料, 2008, 32(11): 69-71.
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    LI Xiao-yan, WANG Shun-xing, TIAN Bao-hong. Effect of Rare Earth on Microstructure and Electrical Breakdown Properties of Cu-Cr Alloys[J]. Materials and Mechanical Engineering, 2008, 32(11): 69-71.
    Citation: LI Xiao-yan, WANG Shun-xing, TIAN Bao-hong. Effect of Rare Earth on Microstructure and Electrical Breakdown Properties of Cu-Cr Alloys[J]. Materials and Mechanical Engineering, 2008, 32(11): 69-71.
    shu

    稀土元素对铜-铬触头材料显微组织和电击穿性能的影响

    Effect of Rare Earth on Microstructure and Electrical Breakdown Properties of Cu-Cr Alloys

      摘要
    • 摘要: 对加入不同含量稀土元素(RE)的铜-铬触头材料在10 Pa真空条件下的电击穿性能进行了研究;通过对比不同稀土元素含量铜-铬触头材料的显微组织和电击穿前后硬度值的变化,分析了铜-铬触头材料的击穿机理.结果表明:稀土元素的加入能显著细化晶粒,并能提高材料的耐电压强度,加入质量分数为0.20%RE比加入0.06%RE更能细化铜-铬合金晶粒,其耐电压强度和硬度的提高也更明显;稀土元素的加入有利于电弧的熄灭.

       

      Abstract: The electrical breakdown properties of Cu-Cr contact materials with different RE content under 10 Pa vacuum condition were studied.Breakdown mechanism of Cu-Cr contact materials with different RE content were analyzed through comparing the variation of microstructure and hardness.The results show that RE can make the grain finer and increase the dielectric strength.0.20%RE addition made the grain finer than 0.06%RE did and increased the dielectric strength and hardness more obviously,so 0.20%RE addition made the contact material to be interruppted more easily.

       

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