【摘要】 采用铸渗法成功制备出ZTA(ZrO2增韧Al2O3)陶瓷颗粒增强合金钢基耐磨复合材料。制备方法:将陶瓷颗粒与自制粘结剂混合填充到具有一定型腔的模具中,加压凝固后获得多孔连通的陶瓷预制体;将预制体固定到铸型中,浇注合金钢,浇注温度1 500~1 560℃,金属液铸渗预制体获得局部复合的耐磨复合材料。结果表明:铸渗效果良好,陶瓷颗粒与合金钢基体界面结合紧密,无缩孔、裂纹等缺陷;陶瓷颗粒在复合材料中的体积分数为42%~56%;在三体磨料磨损条件下,ZTA/合金钢复合材料的抗三体磨料磨损性能是合金钢基体的4.37倍。更多还原

【Abstract】 ZTA(ZrO2 toughened Al2O3) ceramic particles reinforced alloy steel matrix composites have been prepared successfully by casting infiltration process.The experimental details are: firstly,mix the ceramic particles and self-made agglutinant,and fill the mixture into a die,then obtain the porous networks ceramic preform after pressing and solidification;secondly,rivet the preform in sand mould and cast at 1 500-1 560 ℃;then wearable composites were prepared successfully by metal liquid infiltrating porous networks ceramic preform.The results show that the interface between ceramic particles and alloy steel matrix is compact,and there are no defects such as shrinkage,crack and so on;the volume fraction of ceramic particle is 42%-56%;the three-body abrasive resistance of ZTA/alloy steel composites is 4.37 times higher than that of alloy steel matrix.更多还原