CAJ | 학술논문

采用自行研制的往复摩擦磨损试验机,在法向栽荷为50 N、往复频率1 Hz、摩擦副接触形式为圆环外圆周/平面、初始线接触长度为6 mm,相对湿度为80%、体积含量25%小牛血清去离子水溶液边界润滑的试验条件下,研究试验环境温度对超高分子量聚乙烯(UHMWPE)与铁合金配副的往复摩擦磨损性能的影响,并利用扫描电子显微镜观察37℃时磨损表面形貌.结果表明:试验环境温度θ由10℃升高至30℃,UHMWPE/钛合金摩擦副的平均摩擦因数μa呈明显下降趋势,由30℃升高至37℃时,μa开始缓慢上升,UHMWPE的体积磨损量Wv随试验环境温度θ变化也呈现相似的规律;磨损机制主要表现为磨料磨损.
채용자행연제적왕복마찰마손시험궤,재법향재하위50 N、왕복빈솔1 Hz、마찰부접촉형식위원배외원주/평면、초시선접촉장도위6 mm,상대습도위80%、체적함량25%소우혈청거리자수용액변계윤활적시험조건하,연구시험배경온도대초고분자량취을희(UHMWPE)여철합금배부적왕복마찰마손성능적영향,병이용소묘전자현미경관찰37℃시마손표면형모.결과표명:시험배경온도θ유10℃승고지30℃,UHMWPE/태합금마찰부적평균마찰인수μa정명현하강추세,유30℃승고지37℃시,μa개시완만상승,UHMWPE적체적마손량Wv수시험배경온도θ변화야정현상사적규률;마손궤제주요표현위마료마손.
Effect of temperature of test environment on reciprocating friction and wear behaviors of UHMWPE/Ti6Al4V rubbing pairs was investigated at 80 % RH ( relative humidity ) with a homemade reciprocating friction and wear tester under the condition of boundary lubrication with 25 vol.% calf serum deionized water solution as artificial synovia. The contact between polymer ring' s outside circumference and titanium alloy disk' s plane took the form of line/plane, their length of initial linear contact was thus 6 mm, normal load was 50 N and reciprocating frequency was 1 Hz.In order to investigate wear mechanism, photographies of worn surfaces were observed by SEM at 37 ℃.The results showed that the friction coefficient averageμa of UHMWPE/Ti6Al4V rubbing pairs decreased obviously when temperature of test environment θ increased from 10 ℃ to 30℃ ,but it began to increase slowly when θ increased from 30 ℃ to 37 ℃ ; variation of volume loss of wear of UHMWPE Wv with θ was similar with that of μa ;wear mechanism of UHMWPE against titanium alloy was primary abrasive wear.