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铸造烧结法制备ZTA陶瓷颗粒增强高铬铸铁基复合材料工艺过程中,ZTA陶瓷增强体的性能演变直接关系到复合材料的综合性能。本文研究了铸造烧结工艺对ZTA陶瓷组分和力学性能的影响,对比了热处理态ZTA陶瓷与高铬铸铁的三体磨损性能。结果表明:铸造烧结各工艺段,ZTA陶瓷都由t-ZrO_2相、α-Al_2O_3相和少量m-ZrO_2相组成,铸造烧结工艺对ZTA陶瓷密度影响较小,但对抗弯强度和硬度的影响较大;热处理态ZTA陶瓷硬度是高铬铸铁的2.65倍,三体磨料磨损性能是高铬铸铁的1.52倍。
Casting sintering ZTA ceramic particle reinforced high chromium cast iron matrix composite process, ZTA ceramic enhancer performance evolution is directly related to the composite properties. In this paper, the effects of casting and sintering process on the composition and mechanical properties of ZTA ceramics were investigated. The three-body wear properties of ZTA ceramics and high chromium cast iron in heat treatment were compared. The results show that the ZTA ceramics are composed of t-ZrO_2 phase, α-Al_2O_3 phase and a small amount of m-ZrO_2 phase in each process section of casting and sintering. Casting and sintering process has little effect on the ceramic density of ZTA, but affects the bending strength and hardness Larger; heat treatment state ZTA ceramic hardness is 2.65 times higher chromium cast iron, three-body abrasive wear performance is 1.52 times higher chromium cast iron.