基体对ZTA_(p)/钢基复合材料磨损性能的影响  

Effect of Matrix on Wear Properties of ZTA_(p)/Steel Matrix Composites

作　　者：龚文豪 卢德宏[1] 胥长龙 GONG Wenhao;LU Dehong;XU Changlong(School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《热加工工艺》2024年第17期84-88,共5页Hot Working Technology

基　　金：国家自然科学基金项目(51865024)。

摘　　要：研究不同基体成分对空间结构复合材料冲击磨料磨损性能的影响。采用挤压铸造法制备复合区内基体Cr含量不同的空间结构ZTA_(p)/40Cr钢基复合材料,经850℃淬火及200℃低温回火,进行冲击磨料磨损试验,并和纯高锰钢进行比较。结果表明:复合区中基体Cr含量由2wt%、5wt%、15wt%逐渐升高时,复合材料的体积磨损率分别为8.02×10-4、5.37×10-4、5.46×10-4 cm3/min,趋势为先降低,然后趋于稳定。而高锰钢体积磨损率则为7.57×10-4 cm3/min,因此,含5wt%Cr复合材料耐磨性比高锰钢提高了41%。分析表明:具有一定Cr含量的ZTA_(p)/40Cr钢基复合材料磨损机制主要为磨料磨损,强韧适中的基体能保证良好的支撑和吸能,与增强相互相协同,使得复合材料的耐磨性提高。The effects of different matrix compositions on the impact abrasive wear properties of spatial structure composites were investigated.ZTA_(p)/40Cr steel matrix composites with different matrix Cr contents in the composite zone were prepared by squeeze casting.After quenched at 850℃and tempered at 200℃,impact abrasive wear experiments of the specimens were carried out,which were compared with high manganese steel.The experimental results show that the matrix Cr content in the composite zone gradually increases from 2wt%,5wt%and 15wt%,the volume wear rates of the composites are 8.02×10-4 cm3/min,5.37×10-4 cm3/min and 5.46×10-4 cm3/min,respectively.The trend decreases first and then stabilizes.In contrast,the volume wear rate of high manganese steel is 7.57×10-4 cm3/min,so the wear resistance of the composites containing 5wt%Cr is 41%higher than that of high manganese steel.The analysis shows that the wear mechanism of ZTA_(p)/40Cr steel matrix composites with a certain Cr content is mainly abrasive wear and adhesive wear,and that a matrix with good performance ensures excellent support and energy absorption.In coordination with the reinforcement,the wear resistance of the composites is improved.

关 键 词：冲击磨料磨损 钢基复合材料 挤压铸造 基体成分 

分 类 号：TB333.11[一般工业技术—材料科学与工程]