压制压力及烧结温度对Fe-Cr-W-Ti-Y_2O_3合金组织与性能的影响  

Effects of Pressing Pressure and Sintering Temperature on the Microstructure and Properties of Fe-Cr-W-Ti-Y_2O_3 Alloy

作　　者：姚振华[1] 熊惟皓[1] 彭倩筠[1] 周敏[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《机械工程材料》2011年第6期4-7,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金重点资助项目(50634060)

摘　　要：采用粉末冶金法制备了Fe-12Cr-2.5W-0.4Ti-0.3Y_2O_3合金,研究了压制压力及烧结温度对烧结体组织与性能的影响。结果表明:铬、钨原子在高能球磨过程中未能完全固溶于α-Fe中,而在烧结过程中能实现完全固溶;压坯密度和抗弯强度随压制压力增大而增加,并在压力达到700 MPa后趋于稳定;提高压制压力与烧结温度可提高烧结体抗拉强度,在压制压力700 MPa,烧结温度1400℃的条件下,烧结体抗拉强度为416.7 MPa,材料断裂方式为韧性断裂。The Fe-12Cr-2. 5W-0. 4Ti-0. 3Y2O3 alloy was prepared by powder metallurgy method, and the effects of pressing pressure and sintering temperature on microstructure and properties of the sintered body were studied. The results show that chromium and tungsten atoms had not completely entered into α-Fe in solid solution mode during milling, but complete solid solution could be carried out during sintering. The pressed compact density and bending strength raised with the increase of the pressing pressure and gradually tended to stability after the pressure was up to 700 MPa. The increase of pressing pressure and sintering temperature was advantageous to the raising of the sintered body strength. The sintered body tensile strength was 416. 7 MPa when pressing pressure was 700 MPa and sintering temperature was 1 400 ℃, and the fracture mode was ductile fracture.

关 键 词：粉末冶金 压制压力 烧结温度 抗拉强度 

分 类 号：TF125[冶金工程—粉末冶金]