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利用自主研发的机械蓄能式高速压机成形Ti-29Nb-13Ta-4.6Zr粉末并进行真空烧结,研究冲击能量对试样的密度及力学性能的影响。结果表明:随着冲击能量的提高,试样生坯密度提高,在冲击能量为1 805 J时,获得的最大生坯密度达到5.63 g/cm~3(相对密度94.1%);径向弹性后效随着冲击能量增加而增加;经真空1 250℃烧结后,烧结坯的密度随着冲击能量的增加而增加,但烧结坯的体积发生了膨胀,最大烧结密度为5.53 g/cm~3(相对密度为92.5%);真空烧结2.0 h后,钛合金的抗拉强度和硬度达到最大值,分别为629.8 MPa和324.5 HV。
Ti-29Nb-13Ta-4.6Zr powder was formed by self-developed mechanical energy storage high-speed press and vacuum sintering was carried out to study the impact of impact energy on the density and mechanical properties of the sample. The results show that with the increase of impact energy, the green density of the sample increases. The maximum green density reaches 5.63 g / cm ~ 3 (relative density 94.1%) at impact energy 1 805 J; The results show that with the increase of impact energy, the density of sintered billet increases with the increase of impact energy after sintering at 1 250 ℃, but the volume of sintered billet expands with a maximum sintering density of 5.53 g / cm ~ 3 The relative density was 92.5%). After 2.0 h of vacuum sintering, the tensile strength and hardness of titanium alloy reached the maximum values of 629.8 MPa and 324.5 HV, respectively.