氧化铝基金属陶瓷挤压模具材料的制备及分析  

Preparation and Study of Alumina Based Metal-Ceramic Extrusion Die Material

作　　者：崔继强[1] 徐和林 刘学强 

机构地区：[1]滨州学院实训中心,山东滨州256600 [2]中航工业四川凌峰航空液压有限公司,四川广汉618300 [3]山东滨州渤海活塞公司,山东滨州256600

出　　处：《热加工工艺》2015年第8期61-64,67,共5页Hot Working Technology

基　　金：滨州学院青创基金资助项目(BZXYQNLG201101)

摘　　要：以微米Al_2O_3、W以及Cr为主要原料,采用热压烧结工艺制备了Al_2O_3基金属陶瓷挤压模具材料。分析了烧结样品的致密度、弯曲强度、断裂韧性、硬度以及摩擦性能。结果表明:当微米Al_2O_3添加量为70.5wt%,W为14wt%以及Cr为14wt%,同时当烧结温度为1600℃时,所制备的金属陶瓷挤压模具材料性能最佳,致密度为99.6%,弯曲强度890 MPa,断裂韧性为15.72 MPa·m^(1/2),硬度为78.8 HRA,载荷为120N时的摩擦系数为0.53。适量的微米W粉和Cr粉在金属陶瓷挤压模具材料中起桥接增韧的作用。Al2O3 based metal-ceramic extrusion die materials were fabricated with hot-pressing sintering technique by using micro Al2O3, W and Cr as main materials. The properties of relative density, bending strength, fracture toughness, hardness and friction properties were tested. The results show that when the content of micro Al2O3 is 70.5wt%, W is 14wt% and Cr is 14wt%, meanwhile, the sintering temperature is 1600 ℃ as well, the prepared metal-ceramic extrusion die material can achieve the best properties. The relative density, flexural strength, fracture toughness and hardness of metal-ceramic compound die material is 99.6%, 890 MPa, 15.72 MPa .mma and HRA 78.8 respectively. The firction coefficient is 0.53 at the condition of friction force of 120N. The moderate amount of micron W powder and Cr powder plays bridge toughening effect in metal ceramic extrusion die material.

关 键 词：微米 AL2O3 热压烧结 力学性能 磨损性能 

分 类 号：TG222[金属学及工艺—铸造]