稀土CeO_2对W-Ni-Fe高比重合金摩擦磨损性能的影响
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摘要
采用高能球磨和放电等离子体烧结技术制备了93W-4.9Ni-2.1Fe-xCeO_2高比重合金,通过XRD、SEM、显微硬度计及摩擦磨损试验机等研究了稀土CeO_2添加量对W-Ni-Fe高比重合金物相、显微组织及摩擦磨损行为等的影响。结果表明,微量稀土氧化物掺杂后,W衍射峰出现不同程度的宽化现象,晶粒得到细化,生成的复合稀土相Ce_xW_yO_z可以促进Ni、Fe在W晶格中的固溶。显微硬度不断减小,相对密度呈现先上升后下降的趋势,当添加含量为0.4 wt%时,相对密度最大。稀土氧化物CeO_2的添加一定程度上降低了合金试样的摩擦磨损性能。当添加量为0.4 wt%时,粘结相分布相对较均匀,W-W之间的界面结合强度较高,相对密度达都最大,合金致密化程度最高,致使磨损曲线比较稳定,对材料耐磨性能的影响程度最小。
引文
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[2]邹俭鹏,张兆森.真空烧结制备90W-Ni-Fe高密度钨合金的性能与显微结构[J].中国有色金属学报,2013,23(3):703-710.
[3]LIU Huiyuan,CAO Shuahua.Densification,microstructure and mechanical properties of 90W-4Ni-6Mn heavy alloy[J].Journal of Refractory Metals and Hard Materials,2013,37:121-126.
[4]范景莲,李鹏飞,刘涛,等.高性能细晶钨及钨合金的研究进展[J].中国钨业,2015,30(2):41-48.
[5]张雪辉,李晓闲,章标,等.稀土改性高密度W-Ni-Fe合金的研究现状及发展趋势[J].功能材料,2016,47(I):66-71.
[6]CAI L H,LIU G R,CAO J.Preliminary study for effectof high energy ball milling on mechanical properties of tungsten heavy alloy[J].Powder Metallurgy Industry,2005,15(3):15.
[7]向道平,丁雷.合金元素或氧化物强化W-Ni-Fe高密度合金的研究进展[J].中国有色金属学报,2013,23(6):1549-1559.
[8]LIU W Q,YUE M,JIANG T,et al.The microstructure of W-Ni-Fe alloy prepared by spark plasma sintering[J].Journal of Fuction Materials,2004,35(z1):3019-3021.
[9]曾毅,范景莲,李勇明.微量稀土La对细晶W-Ni-Fe合金显微组织和性能的影响[J].粉末冶金技术,2010,28(6):403-406.
[10]马运柱,张佳佳,刘文胜,等.真空热处理对微波烧结93W-4.9Ni-2.1Fe合金显微组织及力学性能的影响[J].稀有金属材料与工程,2012,41(7):1680-1683.
[11]晏建武,周继承,鲁世强,等.热处理对W-Ni-Fe高密度合金组织与性能影响[J].国外金属加工,2005,26(4):43-49.
[12]祁美贵,范景莲,张骁,等.微量Y2O3对细晶W-Ni-Fe粉末烧结行为和显微组织的影响[J].中国有色金属学报,2009,19(4):656-661.
[13]RYU H J,HONG S H.Fabrication and properties of mechanically alloyed oxide-dispersed tungsten heavy alloys[J].Materials Science and Engineering A,2003,363:179-184.
[14]张骁,范景莲,刘涛,等.微量稀土Y对细晶93W-4.9Ni-2.1Fe合金性能的影响[J].粉末冶金技术,2009,27(6):425-428.
[15]金永中,刘东亮,孙亚丽,等.稀土元素镧对97W-Ni-Fe合金性能的影响[J].中国钨业,2007,22(2):34-36.
[16]祁美贵,范景莲,黄伯云,等.微量Y2O3对细晶W-Ni-Fe粉末烧结行为和显微组织的影响[J].中国有色金属学报,2009,19(4):656-661.
[17]罗来马,卢泽龙,李浩,等.稀土改性钨合金的研究现状与发展趋势[J].稀有金属,2013,37(6):993-1002.
[18]PENG S G,FAN J L.Effects of rare earth content and reduction temperature on preparation of superfine(W,Ni,Fe)composite powder[J].Materials Science and Engineering of Powder Metallurgy,2008,13(2):106.
[19]ZAFARI A,GHASEMI H M,MAHMUDI R.Effect of earth elements addition on the tribological behavior of AZ91D magnesium alloy at elevated temperature[J].Wear,2013,303(1/2):98-108.
[20]MA Guoliang,TIAN Wei,WANG You.Influence of nanosized rare earth oxide dopant on hardness and wear resistance of 7075aluminum alloy[J].Transactions of Materials and Heat Treatment,2007,28(s):79-85.
[21]LIU Guang-lei.Research on optimization of multielement Al-Si-Cu alloy casting process factors and application in automobile engine cylinder[D].Zhenjiang:Jiangsu University,2013:106.
[22]HE Y J,WINNUBST L,BURGGRAAF A J,et al.Grain-size dependence of sliding wear in tetragonal zirconia polycrystals[J].Journal of the American Ceramic Society,1996,79(12):3090-3096.
[23]ZUM G K H,BUNDSCHUH W,ZIMMERLIN B.Effect of grain size on friction and sliding wear ofoxide ceramics[J].Wear,1993,162/163/164(93):269-279.