本文選題：鎳基耐蝕合金 + 金屬間相�。� 參考：《冶金分析》2015年01期

【摘要】：鎳基耐蝕鋼的性能,在很大程度上取決于鋼中各種相的數(shù)量、組成、大小、分布狀況和合金元素在晶界的分配情況。鎳基耐蝕鋼經(jīng)過(guò)等溫?zé)崽幚?通常會(huì)形成碳化物相、金屬間相等析出相。這些析出相在合金中的形成將導(dǎo)致鋼的脆化,顯著降低鋼的塑性、韌性和耐蝕性。為了對(duì)不同熱處理?xiàng)l件下鎳基耐蝕合金析出相做定性定量分析,實(shí)驗(yàn)在選擇好合適的電解制度后,利用電解分離方法將析出相從基體中分離。通過(guò)掃描電鏡(SEM)和X射線衍射(XRD)定性研究了提取后析出相的形貌以及結(jié)構(gòu)特性的變化過(guò)程;并利用Rietveld全譜擬合法計(jì)算不同析出相的組成及含量,最后還討論了析出相含量與材料耐蝕性能間的關(guān)系。實(shí)驗(yàn)結(jié)果表明900℃時(shí)效形成的析出相最多,且析出相的含量隨時(shí)間的延長(zhǎng)呈明顯上升的趨勢(shì);腐蝕性能評(píng)價(jià)結(jié)果表明析出相的含量與平均腐蝕速率存在一定的正相關(guān),即隨著析出相含量的增加,材料的平均腐蝕速率也增加,耐蝕性能減弱。
[Abstract]:The properties of Ni-based corrosion resistant steels depend to a great extent on the amount, composition, size, distribution and distribution of various phases in the steel and the distribution of alloying elements at grain boundaries.After isothermal heat treatment, Ni-based corrosion resistant steel usually forms carbide phase, which is the same precipitated phase between metals.The formation of these precipitated phases in the alloy will lead to the embrittlement of the steel, which will significantly reduce the plasticity, toughness and corrosion resistance of the steel.In order to qualitatively and quantitatively analyze the precipitated phase of Ni-base corrosion resistant alloy under different heat treatment conditions, the precipitation phase was separated from the matrix by electrolytic separation method after the proper electrolysis system was selected in the experiment.The morphology and structural characteristics of the precipitated phases after extraction were qualitatively studied by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the composition and content of different precipitates were calculated by Rietveld full-spectrum fitting method.Finally, the relationship between the content of precipitated phase and the corrosion resistance of the material is discussed.The experimental results show that the precipitation phase formed at 900 鈩，

本文編號(hào)：1757603