液压泵用球墨铸铁材料的对比研究  

Comparative Study of Ductile Cast Iron Material for Hydraulic Pump

作　　者：张艳涛 陈宗斌[1,2] 廖健 王迎春[1,2] ZHANG Yantao;CHEN Zongbin;LIAO Jian;WANG Yingchun(Institution of Vibration&Noise,Naval University of Engineering,Wuhan Hubei 430033,China;National Key Laboratory on Ship Vibration&Noise,Naval University of Engineering,Wuhan Hubei 430033,China)

机构地区：[1]海军工程大学振动与噪声研究所,湖北武汉430033 [2]海军工程大学,船舶振动噪声国家重点实验室,湖北武汉430033

出　　处：《机床与液压》2022年第16期24-29,共6页Machine Tool & Hydraulics

基　　金：湖北省自然科学基金项目(2020CFB156)。

摘　　要：摩擦副的综合性能决定液压泵的工作寿命,良好的摩擦副材料匹配方案是提高其性能的关键。通过分析国外某齿轮液压泵关键摩擦副材料,制备出一种性能相近的国产球墨铸铁材料。在摩擦磨损试验机上测试2种材料的减摩耐磨性能,通过观察磨损表面形貌确定其磨损机制;通过分析机械性能、显微结构与热学性能找出2种材料的性能差异并分析原因。结果表明:通过优化C、Si的质量分数制备出的国产球墨铸铁材料硬度较进口材料提高28.79%、热膨胀系数降低1.68%;该摩擦试验条件下球墨铸铁自配摩擦副主要发生黏着磨损与磨粒磨损,适当的材料硬度与基体成分能提高其摩擦磨损性能;所制备的球墨铸铁材料的机械性能与热学性能良好,但减摩耐磨性能有待提高。The comprehensive performance of friction pair determines the working life of hydraulic pump,and a good material matching scheme of friction pair is the key to improve its performance.A kind of homemade ductile cast iron material with similar properties was prepared by analyzing a foreign gear hydraulic pump’s key friction pair material.The anti-friction and wearable performance of the two materials were tested on the friction and wear testing machine,and the wear mechanism was determined by observing the wear surface morphology;the differences of the two materials’ properties and the reasons were found out by analyzing the mechanical properties,microstructure and thermal properties.The results show that the hardness of the domestic ductile cast iron is increased by 28.79% and the thermal expansion coefficient is reduced by 1.68% compared with that of imported ductile cast iron by optimizing the mass fraction of C and Si elements;under the friction test conditions,the adhesive wear and abrasive wear mainly occur in the self-matching friction pair of ductile iron,and the friction and wear performance can be improved by uisng the appropriate material hardness and matrix composition;the mechanical and thermal performance of the homemade ductile cast iron are good,but the anti-friction and wearable performance needs to be improved.

关 键 词：液压泵 摩擦副 球墨铸铁 减摩耐磨 磨损形貌 

分 类 号：TH117.1[机械工程—机械设计及理论]