混合实验法在W_Ni_Cu合金组分设计中的应用_辛思彧.pdf

21 4 2016 8 Vol.21 No.4 Materials Science and Engineering of Powder Metallurgy Aug. 2016 W-Ni-Cu 辛思郭从盛董洪峰景然 ( 723000) W-Ni-Cu ( ) W-Ni-Cu R2=1 Ni Cu ()3%5% 94.295%286.55931.51 MPaW-Ni-Cu −0.45%0.06%−8.48%4.46% −5.19%4.15%W-Ni-Cu W-Ni-Cu TB31 A 1673−0224(2016)04−527−07 Application of mixture experiments in the composition design of W-Ni-Cu alloys XIN Siyu, GUO Congsheng, DONG Hongfeng, JING Ran (College of Materials Science and Engineering, Shanxi University of Technology, Hanzhong 723000, China) Abstract: The compositions of W-Ni-Cu alloys were designed via the extreme vertex design method. The composition as independent variable and their corresponding properties as dependent variable (such as relative density, micro-hardness, bending strength) were analyzed by using regression and the programming solver. The W-Ni-Cu alloys were prepared by cool isostatic pressing and sintering, and the effect of the composition on the properties of alloys was studied by testing the density, micro-hardness and mechanical properties. The results show that the multiple correlation coefficient R2 of the regression equation is about 1, and the properties of the alloys change regularly with the variation of compositions. When the mass fractions of Ni and Cu are 3% and 5%, respectively, the optimal mechanical properties with the relative density of 94.295%, the micro-hardness of 286.55 and the bend strength of 931.51 MPa are obtained. The relative density error value of the W-Ni-Cu alloys between calculated value and experimental value is about −0.45%−0.06%, and the micro-hardness error value and the bending stre