(1. 西北工業(yè)大學(xué) 材料學(xué)院, 西安 710072;
2. 中國人民解放軍駐沈陽飛機(jī)工業(yè)(集團(tuán))有限公司, 沈陽 100034)
摘 要: 通過引入一個(gè)與微觀組織相關(guān)的函數(shù)對(duì)穩(wěn)態(tài)流動(dòng)應(yīng)力模型進(jìn)行修正， 建立了金屬材料高溫變形時(shí)的穩(wěn)態(tài)流動(dòng)應(yīng)力模型。 并將該耦合微觀組織參數(shù)的流動(dòng)應(yīng)力模型寫入有限元程序中， 模擬了TC6合金葉片在等溫鍛造過程中初生α相晶粒尺寸的變化。 研究了變形工藝參數(shù)(壓下量， 變形溫度， 變形速度和摩擦因子)對(duì)零件內(nèi)部初生α相晶粒尺寸的影響。
關(guān)鍵字: 葉片； 等溫鍛造； 晶粒尺寸； 數(shù)值模擬
（1. School of Materials Science and Engineering,
Northwestern Polytechnical University, Xi'an 710072,China;
2. Shenyang Aircraft Industries (Group) Co., Ltd.,
Shenyang 100034, China）
Abstract: A constitutive equation to describe a correlation of the deformation behavior with the microstructure evolution of the TC6 alloy during high temperature deformation was proposed, through introducing a function related to the microstructure variables. Combining FEM and the present equation and model for microstructure evolution, the grain size of prior α phase was simulated during the isothermal forging of TC6 alloy airfoil blade using commercial FE software. The present results illustrate the α phase grain size during the forging of TC6 alloy airfoil blade in detail. The simulated results show that the height reduction, deformation temperature and strain rate have more significant effects on the grain size of prior α phase than the friction factor between the billet and the die.
Key words: airfoil blade; isothermal forging; grain size; numerical simulation
