CAJ | 학술논문

采用自行研制的往复摩擦磨损试验机,在法向载荷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%的试验条件下,研究了钛合金表面粗糙度、试验环境温度、试验延续时间、滑液成分等试验参数对UHMWPE/Ti6A14V摩擦副的往复摩擦磨损行为的影响.结果表明,这些试验参数均显著影响UHMWPE/Ti6A14V摩擦副的往复摩擦磨损行为;在环境温度20℃、25%小牛血清去离子水溶液边界润滑、180 min往复摩擦磨损试验条件下,当钛合金表面粗糙度由Ra0.04 μm增加至Ra0.06μm时,摩擦副的平均摩擦因数由0.033增加至0.096,UHMWPE试样磨损量由0.131 mm3,增加至0.149 mm3;在钛合金表面粗糙度为Ra0.06μm、25%小牛血清去离子水溶液边界润滑、180 min往复摩擦磨损试验条件下,当试验环境温度由10℃上升至37℃时,摩擦副的平均摩擦因数由0.135减少至0.077,UHMWPE试样磨损量由0.188 mm3减少至0.134 mm3.
채용자행연제적왕복마찰마손시험궤,재법향재하50 N、왕복빈솔1 Hz、마찰부접촉형식위원배외원주/평면、초시선접촉장도위6 mm、상대습도위80%적시험조건하,연구료태합금표면조조도、시험배경온도、시험연속시간、활액성분등시험삼수대UHMWPE/Ti6A14V마찰부적왕복마찰마손행위적영향.결과표명,저사시험삼수균현저영향UHMWPE/Ti6A14V마찰부적왕복마찰마손행위;재배경온도20℃、25%소우혈청거리자수용액변계윤활、180 min왕복마찰마손시험조건하,당태합금표면조조도유Ra0.04 μm증가지Ra0.06μm시,마찰부적평균마찰인수유0.033증가지0.096,UHMWPE시양마손량유0.131 mm3,증가지0.149 mm3;재태합금표면조조도위Ra0.06μm、25%소우혈청거리자수용액변계윤활、180 min왕복마찰마손시험조건하,당시험배경온도유10℃상승지37℃시,마찰부적평균마찰인수유0.135감소지0.077,UHMWPE시양마손량유0.188 mm3감소지0.134 mm3.
Effects of test parameters including surface roughness of titanium alloy, temperature of test environment, dura-tion of test and components of some artificial synovia on reciprocating friction and wear behaviors of UHMWPE/Ti6A14V rubbing pairs were investigated at 80% RH (relative humidity) with a homemade reciprocating friction and wear tester. 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 6 mm, normal load was 50 N and reciprocating frequency was 1 Hz. The results show that reciprocating friction and wear behaviors of UHMWPE/Ti6A14V rubbing pairs are markedly affected by these test parame-ters. When surface roughness of titanium alloy increases from 0. 04 μm to 0. 06 μm, the average friction coefficient of UH-MWPE/Ti6A14V rubbing pairs increases from 0.033 to 0.096 and volume loss of wear of UHMWPE increases from 0.131 mm3to 0.149 mm3 at 20 ℃ under condition of boundary lubrication with 25% calf serum deionized water solution during 180 minutes of reciprocating friction and wear process. When temperature of test environment increases from I0 ℃ to 37 ℃ ,the average friction coefficient of UHMWPE/Ti6A14V rubbing pairs decreases from 0. 135 to 0. 077 and volume loss of wear of UHMWPE decreases from 0. 188 mm3 to 0. 134 mm3 under condition of that lubricant is 25% calf serum deionized water solution and surface roughness of titanium alloy is 0. 06 μm during 180 minutes of reciprocating friction and wear process.