采用熔體超溫處理技術(shù)對(duì)新型含 Re和 Ru 的鎳基單晶高溫合金熔體進(jìn)行不同溫度的超溫處理, 利用電子探針系統(tǒng)研究了定向凝固過(guò)程中合金元素的溶質(zhì)分布狀態(tài)及溶質(zhì)分配系數(shù)隨熔體超溫處理溫度變化的演化規(guī)律. 結(jié)果表明, 在平界面定向凝固條件下, 隨熔體超溫處理溫度的升高, Al, Ta元素在固液界面前沿液相一側(cè)的分布呈現(xiàn)先增大后減小的趨勢(shì), 而 Re, W, Ru, Co 元素則呈現(xiàn)與之相反的規(guī)律, Mo, Cr 元素?zé)o明顯變化; 當(dāng)熔體從1500 ℃過(guò)熱到 1700 ℃C 時(shí), 各溶質(zhì)元素的溶質(zhì)分配系數(shù)趨近于 1; 當(dāng)進(jìn)一步提高熔體溫度至 1800 ℃時(shí), 各元素溶質(zhì)分配系數(shù)逐漸偏離 1; 而熔體超溫處理溫度對(duì) Ru, Co, Mo, Cr 元素的溶質(zhì)分配系數(shù)影響較小. 熔體超溫處理使合金熔體結(jié)構(gòu)發(fā)生變化, 進(jìn)而影響元素分布, 是導(dǎo)致溶質(zhì)分配系數(shù)發(fā)生變化的主要原因.?
Solute partition coefficient plays an important role in determining the microstructure and?mechanical properties of Ni-based superalloys. Melt superheating treatment can greatly affect the melt structure?and redistribution of solute atom in the melt. However, up to date, there are few investigations of the influence of?melt superheating treatment on the solute partition coefficient, especially for the new-generation Ni-based single?crystal superalloy with additions of Re and Ru. Therefore, in this work, the influence of melt superheating?treatment temperature on the solute partition coefficient of a new Ni-based single crystal superalloy with Re and?Ru elements under planar solid/liquid (S/L) interface under directional solidification conditions was?systematically investigated by using EPMA. It was found that the distribution of solute elements, such as Al, Ta,?Ru, Re, W, Co, showed remarkable change in both sides?of the S/L interface with increasing melt superheating?treatment temperature, but there was little change for the?solute elements of Mo and Cr. With increasing the?superheating treatment temperature, the concentration of?solute elements for Al and Ta increased firstly and then?decreased, but it showed an opposite trend for Re, W, Ru?and Co. When the melt superheating treatment temperature increased from 1500 ℃ to 1700 ℃, the solute?partition coefficients of major solute elements were approaching to 1, however, when the melt superheating?temperature further increased, the solute partition coefficients of the major solute elements deviated from 1.?Additionally, the change of the solute partition coefficients for Ru, Co, Mo and Cr were small with increasing the?melt superheating treatment temperature. The main reasons related to the above changes can be ascribed to that?the variation of melt superheating treatment temperature affects the size of the atom clusters in melt, which gives?rise to the variation of atomic distribution, and thus leads to the change of solute partition coefficients.?
作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，艾荔艾擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊(duì)。在同客戶交易的過(guò)程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對(duì)當(dāng)前和未來(lái)的市場(chǎng)需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。
AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
獲取更多我們供應(yīng)的合金和服務(wù)信息，請(qǐng)致電086-021-67660801或發(fā)電子郵件[email protected]聯(lián)系我們，您也可以通過(guò)微博，微信，領(lǐng)英和推特與我們互動(dòng)。
For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at [email protected]. You can also get in touch on social media, we are constantly active on?Weibo,?Weixin,?LinkedIn?and?Twitter.