本文選題：高溫軸承鋼 + 時效��； 參考：《冶金分析》2017年08期

【摘要】：高溫軸承鋼的性能,在很大程度上取決于鋼中各種相的數(shù)量、組成和大小,軸承鋼經(jīng)過等溫熱處理,通常會形成碳化物相、金屬間相等析出相。為了研究不同熱處理條件下高溫軸承鋼中析出相的析出行為,實驗選擇了合適的電解條件,利用電解萃取方法將析出相從基體中分離。實驗采用X射線衍射(XRD)和掃描電鏡(SEM)研究了提取后析出相的結(jié)構(gòu)及形貌,用化學濕法和電感耦合等離子體光譜儀對析出相的分離與定量成分檢測進行研究。研究結(jié)果表明:電解萃取溫度對χ相萃取量影響明顯,χ相在含氧化劑的弱酸中不溶,在50%(V/V)H_2SO_4中溶解。隨著時效時間的增加,M_6C相明顯增加,χ相減少。M_6C相呈顆粒狀,粒徑細小,χ相呈塊狀,顆粒粗大。
[Abstract]:The properties of high temperature bearing steel depend to a great extent on the number, composition and size of various phases in the steel. After isothermal heat treatment, the bearing steel usually forms carbide phase and the same precipitated phase between metals. In order to study the precipitation behavior of precipitated phase in high temperature bearing steel under different heat treatment conditions, the proper electrolytic conditions were selected and the precipitated phase was separated from the matrix by electrolytic extraction method. The structure and morphology of the precipitated phase were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The separation and quantitative composition of the precipitated phase were studied by chemical wet method and inductively coupled plasma spectrometer. The results show that the temperature of electrolytic extraction has an obvious effect on the amount of 蠂 phase extraction, 蠂 phase is insoluble in weak acid containing oxidant, and dissolved in 50 V / V / V / V / V / V / V / V / V / V / s / 2SO _ 4 / S _ 2SO _ 4. With the increase of aging time, the phase of M _ 6C was obviously increased, 蠂 _ (phase) decreased. M _ (6C) phase was granular, the particle size was small, 蠂 _ (phase) was block, and the grain was coarse.
【作者單位】： 鋼鐵研究總院;
【分類號】：TG142.1

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本文編號：2001251