發(fā)布時間：2018-05-08 07:41

  本文選題：KG合金 + NiCrAlYSi涂層��； 參考：《稀有金屬》2017年03期

【摘要】：采用電弧離子鍍(AIP)技術在K417G合金表面制備了NiCrAlYSi涂層,利用HRS-2M型往復磨損試驗機測試了K417G合金及NiCrAlYSi涂層室溫至400℃以下的摩擦磨損特性,利用掃描電鏡(SEM),能譜分析(EDS)和X射線衍射(XRD)等手段對合金和涂層的磨損表面形貌和橫截面形貌進行觀察和分析。結果表明:K417G合金的磨損率低于NiCrAlYSi涂層,300℃以下,合金摩擦系數(shù)高于涂層。室溫下,合金和涂層磨損機制是疲勞脫層和環(huán)境致脆,環(huán)境致脆磨損機制源于室溫空氣中Ni_3Al相的環(huán)境脆性;磨損過程中,磨損表面形成的新鮮表面中的Ni_3Al相中的Al~+與水汽反應生成原子態(tài)H且逐漸聚集,導致氫致環(huán)境脆性,并逐漸作用于磨損表面;磨損表面的裂紋源在γ/γ'界面處形核,裂紋既沿著γ/γ'界面擴展,又進入γ'晶粒,呈現(xiàn)沿晶和穿晶混合狀。隨磨損溫度升高,Ni_3Al相的環(huán)境脆性消失,合金和涂層磨損表面的環(huán)境致脆特征消失,磨損機制轉變?yōu)轲ぶ�、犁溝、塊狀剝落和氧化磨損機制。
[Abstract]:NiCrAlYSi coating was prepared on the surface of K417G alloy by arc ion plating (AIP) technique. The friction and wear characteristics of K417G alloy and NiCrAlYSi coating were tested by HRS-2M reciprocating wear tester. The wear surface morphology and cross section morphology of alloy and coating were observed and analyzed by means of scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the wear rate of the WK417G alloy is lower than that of the NiCrAlYSi coating under 300 鈩，

本文編號：1860542