摘要
采用真空实型负压铸渗工艺,通过在预制复合层中添加适量钼铁粉进行界面合金化,成功制备出了WCP颗粒增强钢基表面复合材料。结合OM、SEM、XRD和显微硬度计等分析手段对复合层物相组成、显微结构与性能进行了测试。结果表明,添加16.67%(质量分数)的钼铁粉有效改善了复合层界面组织及力学性能的连续性,改善了复合材料的铸渗效果,增加了铸渗层厚度,合金碳化物含量增加,复合层基体硬度约是基材的2倍,提高了复合材料的耐磨性。
WC particles reinforced steel matrix surface composites were fabricated successfully through adding proper ferro-molybdenum powder in the preformed composite layer to control interface by the vacuum full-mold infiltration casting process under negative pressure.The phase compositions,microstructure and hardness of the composite layer were characterized by optical microscope（OM）,scanning electron microscopy（SEM）,X-ray diffraction（XRD）and micro-hardness tester.The results show that,the interface structure and mechanical properties as well as the cast-infiltration effects of the composite layer are improved significantly by adding 16.67 % ferro-molybdenum powder in the preform.Meanwhile,cast-infiltration layer thickness is increased.With the volume fraction of alloy carbide increase,the composites layer hardness is nearly 2 times higher than that of the matrix,greatly enhancing the wear resistance of the WCP/steel composites.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2012年第3期277-279,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50871048)
昆明冶金专科学校基金资助项目
关键词
真空实型负压铸渗工艺
预制复合层
钼铁粉
铸渗层
Vacuum Full-Mold Infiltration Casting Process
Preformed Composite Layer
Ferro-Molybdenum Powder
Cast-Infiltration Layer
