CrMo合金膜層及其性能
( 1. 西北工業(yè)大學 腐蝕與防護研究室, 西安 710072；
2. 西安交通大學 金屬材料強度國家重點實驗室, 西安 710049)
摘 要: 利用多功能離子束增強沉積(IBED)設備， 在Ti6Al4V鈦合金表面制備Cr和CrMo合金膜層， 以提高鈦合金表面的耐磨性能。 利用X射線衍射儀、 掃描電子顯微鏡、 輝光放電光譜儀和顯微硬度計分析和測試了IBED膜層的結構、 形態(tài)、 成分分布、 硬度和膜基結合強度的大小。 利用球-盤磨損試驗機和電化學綜合測試儀研究了IBED膜層的摩擦學性能和電化學腐蝕特性。 結果表明， 利用IBED方法可以在難鍍材料鈦合金表面制備膜基結合強度高、 結晶致密和晶粒尺寸達納米級的高硬度Cr膜和CrMo合金膜層， 顯著提高了鈦合金表面的抗磨性能， 且膜層本身有很好的耐Cl-介質環(huán)境電化學腐蝕性能， 與鈦合金基體之間有很好的接觸腐蝕相容性。
關鍵字: 鈦合金； 離子束增強沉積； Cr膜； CrMo合金膜； 磨損； 腐蝕
TIAN Lin-hai2, WEN Sheng-ping2, ZONG Rui-lei2
（ 1. Corrosion and Protection Research Laboratory,
Northwestern Polytechnical University, Xi'an 710072, China;
2. State Key Laboratory for Mechanical Behavior of Materials,
Xi'an Jiaotong University, Xi'an 710049, China）
Abstract: Cr and Cr-Mo coatings were prepared on the substrate of Ti6Al4V alloy with multi-function ion-beam enhanced deposition (IBED) equipment in order to improve the wear resistance of the alloy. The microstructures, morphologies, component distributions, hardness and bonding strength of coatings were studied by X-ray diffractometer, scanning electron microscope, glow-discharge photo-electron spectroscope and micro-hardness tester, respectively. The wear resistance and electrochemical corrosion properties of IBED coatings were investigated with ball-on-disk wear tester and electrochemical equipment, respectively. The results show that the denser, harder and nanometer crystalline Cr and Cr-Mo coatings with higher bonding strength can be prepared on titanium alloy surface by IBED method. The IBED Cr and Cr-Mo coatings significantly improve the wear resistance of Ti alloy surface, and the coatings have good corrosion resistance, low galvanic corrosion sensitivity and contact compatibility with titanium alloy in solution containing Cl-.
Key words: titanium alloy; ion-beam-enhanced deposition; Cr coating; CrMo coating; wear; corrosion
