搅拌摩擦加工对铸态SiCp/ZL101组织和摩擦磨损性能的影响
Effect of friction stir processing on microstructure and friction and wear properties of as-cast SiCp/ZL101 composites
袁贝 1廖敦明 1蒋文明 1李广宇 1顾建华2
作者信息
- 1. State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
- 2. Guangdong Hongtu(Nantong)Mould Co.,Ltd.,Nantong 226300,China
- 折叠
摘要
采用搅拌摩擦搭焊(FSLW)将铸态SiCp/ZL101与ZL101板材进行焊接制备新型制动盘材料,铸态SiCp/ZL101复合材料板材被搅拌摩擦加工(FSP)改性.研究了铸态SiCp/ZL101在搅拌摩擦加工(FSP)前后的组织和摩擦磨损性能,以评价新型制动盘材料的制动性能.经过FSP处理后,SiCp/ZL101组织中孔隙被消除,SiC颗粒的平均尺寸由12.8 μm降低到3.9 μm.晶粒明显细化,尺寸由8.2 μm减小到3.2 μm.铸态SiCp/ZL101在摩擦初始阶段,摩擦因数先上升再下降,500 s之后趋于平稳,摩擦因数波动幅度较大.FSP后SiCp/ZL101的微观硬度及摩擦因数的波动幅度均减小,摩擦过程平稳,磨损量相当于铸态SiCp/ZL101的45%左右.铸态SiCp/ZL101以磨粒磨损为主,表现出疲劳磨损的特征.FSP后SiCp/ZL101以氧化磨损为主,磨屑尺寸相对较小.
Abstract
Friction stir lap welding(FSLW)was used to weld as-cast SiCp/ZL101 composite plate and ZL101 alloy plate to prepare a new brake disc material,and the as-cast SiCp/ZL101 composite plate was modified by friction stir processing(FSP).The microstructure and friction and wear properties of the as-cast SiCp/ZL101 composites after FSP were studied to evaluate the braking performance of the new brake disc material.After FSP,the pores in the SiCp/ZL101 composites are eliminated,and the average size of SiC particles is reduced from 12.8 μm to 3.9 μm.The grains are obviously refined from 8.2 μm to 3.2 μm.The friction coefficient of the as-cast SiCp/ZL101 composites increases firstly and then decreases in the initial stage,and then tends to be stable after 500 s,but the friction coefficient fluctuates greatly.After FSP,the fluctuation ranges of the microhardness and friction coefficient are all reduced,the friction process is stable,and the wear extent is equivalent to about 45%of that of the as-cast SiCp/ZL101 composites.The as-cast SiCp/ZL101 composites are dominated by abrasive wear,showing a fatigue wear characteristic.The FSPed SiCp/ZL101 composites are dominated by oxidation wear,and the size of wear debris is relatively small.
关键词
搅拌摩擦加工/SiCp/ZL101/微观组织/摩擦磨损性能/磨损机理Key words
friction stir processing/SiCp/ZL101 composites/microstructure/friction and wear properties/wear mechanism引用本文复制引用
基金项目
国家重点研发计划(2020YFB2008300)
国家重点研发计划(2020YFB2008304)
国家自然科学基金(52271102)
国家自然科学基金(52075198)
Analytical and Testing Center,Huazhong University of Science and Technology,China()
出版年
2023
NETL
NSTL
万方数据