2B相的原位生成,使合金的耐電壓強(qiáng)度提高57.5%,截流值降低21%,摩擦系數(shù)降低了32.7%,提高了CuW合金的電擊穿性能和耐磨性。對(duì)真空電擊穿后的表面燒蝕形貌分析發(fā)現(xiàn),添加B元素的CuW合金擊穿坑分散且較小,銅液的集中飛濺現(xiàn)象減輕。"/>

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原位生成硼化鎢對(duì)CuW合金組織與性能的影響
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西安理工大學(xué)

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國(guó)家自然基金重點(diǎn)項(xiàng)目(U1866203)；國(guó)家自然基金重點(diǎn)項(xiàng)目(51834009);陜西省科技統(tǒng)籌創(chuàng)新工程重點(diǎn)實(shí)驗(yàn)室項(xiàng)目(2014SZS08K02)


Effects of In-Situ Produce Tungsten Boride on Microstructures and Properties of CuW alloy
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1.Xi’an University of Technology,Xi’an 710048;2.China

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    摘要:

    用粉末冶金-燒結(jié)熔滲法制備了不同B添加量的 CuW合金。研究了B添加量對(duì) CuW合金組織、靜態(tài)性能,真空電擊穿性能以及耐磨性的影響。結(jié)果表明,B元素在W骨架燒結(jié)過程中原位生成了硼化鎢,強(qiáng)化了W骨架,使CuW合金的硬度提高到215HB。同時(shí)W2B相的原位生成,使合金的耐電壓強(qiáng)度提高57.5%,截流值降低21%,摩擦系數(shù)降低了32.7%,提高了CuW合金的電擊穿性能和耐磨性。對(duì)真空電擊穿后的表面燒蝕形貌分析發(fā)現(xiàn),添加B元素的CuW合金擊穿坑分散且較小,銅液的集中飛濺現(xiàn)象減輕。

    Abstract:

    A series of Cu-W alloys added with Boron powder were prepared by means of powder metallurgy-infiltration process. The effects of Boron addition on the microstructure and properties of CuW alloys were investigated.The static properties, the vacuum breakdown property and the wear resistance were studied respectively. The results show that boron element and W were in-situ reacted and formed tungsten boride pahse in the sintering process of W skeletons. The hardness of the CuW alloy increases to 215HB owing to the strengthens of W skeletons. Meanwhile,the breakdown strength is increased by 63.2%, the chopping current is decreased 21%, and the coefficents of friction is decreased 32.7%, respectively. The wear resistance of the CuW alloys is enhanced significantlly. The metallographic analysis of CuW alloys after vacuum breakdown showed that the splash of liquid copper is decreased, the breakdown areas increase but the erosion pits become shallower and smaller.

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楊曉紅,趙伊鵬,鄒軍濤,肖鵬,梁淑華.原位生成硼化鎢對(duì)CuW合金組織與性能的影響[J].稀有金屬材料與工程,2021,50(2):679~686.[Yang Xiaohong, Zhao Yipeng, Zou Juntao, Xiao Peng, Liang Shuhua. Effects of In-Situ Produce Tungsten Boride on Microstructures and Properties of CuW alloy[J]. Rare Metal Materials and Engineering,2021,50(2):679~686.]
DOI：10.12442/j. issn.1002-185X.20200182

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  • 收稿日期:2020-03-18
  • 最后修改日期:2020-06-05
  • 錄用日期:2020-06-09
  • 在線發(fā)布日期: 2021-03-09
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