WC颗粒增强钢(铁)基表层复合材料的热疲劳特性  

Thermal Fatigue Performance of WC Particles Reinforced Fe Matrix Surface Composites

作　　者：冯志扬 李祖来[1] 山泉[1] 黄浩科 蒋业华[1] 周荣[1] 

机构地区：[1]昆明理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2015年第8期859-862,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51361019)

摘　　要：采用等离子快速烧结(SPS)+界面重熔法成功制备了具有不同组织的WC颗粒增强钢(铁)基表层复合材料,并对复合材料的热疲劳性能进行了测试,重点研究了基体、WC颗粒分布及界面对复合材料热疲劳特性的影响。结果表明,当基体组织为珠光体时,表层复合材料具有较好的耐热疲劳性能;WC颗粒分布会显著影响复合材料的热疲劳特性;边缘排布一排WC颗粒的复合材料具有较小的热疲劳裂纹扩展速率;材料的界面直接影响着材料的热疲劳性能。A series of matrix composites reinforced by tungsten carbide particles with different sizes were fabricated by spark plasma sintering（SPS）technology combined with interface remelting process in a vacuum tube furnace to investigate thermal fatigue performance of the surface composites prepared,focusing on effects of interface,particles distribution and matrix in the composite for thermal fatigue behavior.The results show that thermal fatigue performance of the composites with pearlite at surface layer is supperior to those of the composites with ferrite matrix.The distribution of particles is related with the thermal fatigue performance of composites observably.The composites with a row of particles distributed at the edge exhibit the smaller crack propagation rate.The interface is directly related with the thermal fatigue performance of the composites prepared.

关 键 词：表层复合材料 热疲劳 复合层组织 等离子烧结 颗粒分布 

分 类 号：TB331[一般工业技术—材料科学与工程] TG142.7[金属学及工艺—金属材料]