CAJ | 학술논문

采用电弧离子镀技术（AIP）在YW2合金基体表面制备了TiAlN涂层，通过化学方法退除基体上的涂层，分析了硬质合金表面退除涂层后和镀覆涂层前成分和元素存在形态的变化。发现当样品在30％H2O2、草酸钾COOK（1.5mol · L －1）、缓蚀剂葡萄糖酸钠GA和 NaOH ，VNaOH溶液∶V30％ H2O2∶ VCOOK溶液＝1∶1∶1，45℃时，45 min可以退除涂层，肉眼未观察到基体表面受腐蚀。涂层退除后样品表面光亮，呈现合金未镀覆涂层前颜色。通过对退镀后YW2基体和基体镀覆涂层前的表面XPS定性及定量分析发现，退除涂层后，基体表面W元素结合能和N元素主峰结合能与XPS结合能与参照表上对应结合能变化很小，元素的价态没有发生变化；镀覆TiAlN涂层时扩散到合金浅表层的Al ，Ti ，N元素，造成表面Al ，Ti ，N元素含量较镀覆涂层前增加，结合能位置偏移，形成AlN和TiN ，有利于重新镀覆的涂层与合金基体的结合。
채용전호리자도기술（AIP）재YW2합금기체표면제비료TiAlN도층，통과화학방법퇴제기체상적도층，분석료경질합금표면퇴제도층후화도복도층전성분화원소존재형태적변화。발현당양품재30％H2O2、초산갑COOK（1.5mol · L －1）、완식제포도당산납GA화 NaOH ，VNaOH용액∶V30％ H2O2∶ VCOOK용액＝1∶1∶1，45℃시，45 min가이퇴제도층，육안미관찰도기체표면수부식。도층퇴제후양품표면광량，정현합금미도복도층전안색。통과대퇴도후YW2기체화기체도복도층전적표면XPS정성급정량분석발현，퇴제도층후，기체표면W원소결합능화N원소주봉결합능여XPS결합능여삼조표상대응결합능변화흔소，원소적개태몰유발생변화；도복TiAlN도층시확산도합금천표층적Al ，Ti ，N원소，조성표면Al ，Ti ，N원소함량교도복도층전증가，결합능위치편이，형성AlN화TiN ，유리우중신도복적도층여합금기체적결합。
TiAlN Coatings were stripped by chemical method ,which were deposited on YW2 Alloy by arc ion plating .The sur‐face morphology and composition of the cemented carbide after stripping TiAlN coatings by chemistry method were analyzed .It was found that TiAlN coatings on the cemented carbide substrates could be removed by being taken in 30% of hydrogen peroxide and potassium oxalate in alkaline mixed solution(VNaOH solution ∶V30% H2O2 ∶VCOOK solution =1∶1∶1)at 45 ℃ for 45 minutes .The sur‐face of the cemented carbide substrate was bright ,and the color was the same as that before depositing TiAlN coatings .The sur‐face of the substrate after removing was studied by X‐ray photoelectron spectrum (XPS) .The results showed that binding ener‐gies of the W element and the main peak of N element on the substrate surface were much close to the criterion binding energy in the XPS data‐base;and the valence of the element on the YW2 alloy changed little .The Al ,Ti and N elements diffusing into the superficial zone of the sample during the coating depositing process made their contents increase and the band energy location off‐set after stripping the coating .TiN and AlN were formed ,which benefit to increase the film‐substrate cohesion during re‐prepar‐ing coatings .The influence of stripping solution on the corrosion degree of cemented carbide substrate was small .