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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-0.3Y_2O_3 alloy was prepared by powder metallurgy. The effects of pressing pressure and sintering temperature on the microstructure and properties of the sintered compact were investigated. The results show that the chromium and tungsten atoms can not completely dissolve in α-Fe during high-energy ball milling and can be completely dissolved during sintering. The compact density and flexural strength increase with increasing compressive stress When the pressure reaches 700 MPa, it tends to be stable. Increasing the pressing pressure and sintering temperature can increase the tensile strength of the sintered body. Under the condition of the pressing pressure of 700 MPa and the sintering temperature of 1400 ℃, the tensile strength of the sintered body is 416.7 MPa, Toughness fracture.