發(fā)布時(shí)間：2018-04-14 06:21

  本文選題：TiAlV合金 + 輝光放電　； 參考：《材料熱處理學(xué)報(bào)》2015年S2期

【摘要】：利用針狀等電位空心陰極放電技術(shù),在低于鈦合金Ti6Al4V相變溫度下,對(duì)其表面進(jìn)行W-Mo共滲。利用掃描電子顯微鏡、X射線衍射儀、顯微硬度計(jì)、球-盤摩擦磨損試驗(yàn)儀等分析了改性層的表面及截面形貌、相組成、顯微硬度;及在室溫干摩擦條件下的耐磨性能;利用沖刷腐蝕試驗(yàn)機(jī)研究了W-Mo合金滲層在單相流和雙相流沖刷腐蝕條件下,在Na Cl腐蝕介質(zhì)中的耐蝕性能。結(jié)果表明:Ti6Al4V基體經(jīng)過W-Mo共滲處理后,在其表面形成了厚度約為25.0μm的合金改性層。合金層由Al MoTi_2和Ti_xW_(1-x)相組成。改性層的顯微硬度高達(dá)850 HV0.1,較基體(450 HV0.1)顯著提高,改性層的平均摩擦系數(shù)也從基體的0.30降到0.14。W-Mo合金滲層良好的表面力學(xué)性能有效的保護(hù)了基體材料不受外力的沖刷,在單相流沖蝕下,W-Mo合金滲層的腐蝕速度只是基體Ti6Al4V的1/19;在雙相流沖蝕條件下,只是基體Ti6Al4V的1/37。
[Abstract]:The surface of titanium alloy was co-infiltrated with W-Mo at the temperature below the Ti6Al4V phase transition temperature by using needle-shaped equipotential hollow cathode discharge technique.The surface and cross section morphology, phase composition, microhardness and wear resistance of the modified layer were analyzed by means of scanning electron microscope (SEM), microhardness tester, ball disk friction and wear tester, etc.The corrosion resistance of W-Mo alloy layer in NaCl corrosion medium under the condition of single-phase flow and two-phase flow erosion corrosion was studied by means of scour corrosion tester.The results showed that the alloy modified layer with thickness of 25.0 渭 m was formed on the surface of the matrix treated by W-Mo.The alloy layer consists of Al MoTi_2 and TixW _ T _ 1-x) phases.The microhardness of the modified layer is as high as 850HV0.1, which is significantly higher than that of the substrate 450HV0.1. the average friction coefficient of the modified layer is reduced from 0.30 of the matrix to the good surface mechanical properties of the 0.14.W-Mo alloy infiltration layer, which effectively protects the matrix material from external scouring.The corrosion rate of the infiltrating layer of W-Mo alloy under single-phase flow erosion is only 1 / 19 of that of the matrix Ti6Al4V, and that of the matrix Ti6Al4V is only 1 / 37 of that of the matrix Ti6Al4V under the condition of two-phase flow erosion.
【作者單位】： 北京石油化工學(xué)院材料科學(xué)與工程學(xué)院;
【基金】：北京石油化工學(xué)院優(yōu)秀學(xué)科帶頭人培育計(jì)劃(BIPTBPOAL-2013)
【分類號(hào)】：TG174.4

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本文編號(hào)：1748099