• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2004년도 학술대회지
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• pp.111-116
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• 2004

Li-complex and urea type greases (each 10 species) which were furnished by Chang-Am LS, analyzed anti-wear performance into fretting wear tester & four-bail wear tester. from the results of fretting wear test, the wear volume of Li-complex greases are $4.6\~8.9mg\;and\;8.3\~14.4mg$ with the test of urea greases. The anti-wear performance for 4-ball wear test of greases produced results around 0.5mm at the value of WSD. The grease life performance were evaluated by SKF-ROF Grease Tester and wheel bearing life tester. From the results of SKF-ROF tester, the life performance evaluated by whole working time produced results $50\~300hr$ with the Li-complex greases and 100-1000hr with the urea greases. That is to say, in spite of severe condition at the higher of $10^{\circ}C$ reaction temp, the life performance with Urea type greases are much superior to Li-complex type greases. Prior to wheel bearing life tester, the grease selected performance evaluation(=anti-wear test) are tested by wheel bearing tester. In this results, we can confirm results those are similar with SKF-ROF tester. In this study, we can draw two major conclusions, one is that Li-complex greases are superior to urea greases with anti-wear properties and the other is that urea greases are much superior to Li-complex greases with life performance.

• Tribology and Lubricants
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• 제1권1호
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• pp.80-87
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• 1985

고온에서 화학적역안정성 및 기계적안정성의 섬유구조를 갖기 위해 lithim complex gellant로 정한 지방산과 $LiOH\cdot H_2O$ 및 boric acid의 이차연속검화반응으로 lithium dual complex 그리이스를 합성하였다. complex gellant의 양은 14%(NLGI 2호)가 적정량이었으며, 특히 castor wax를 1.5% 첨가했을때 이상적인 성능을 나타냈다. 이렇게 합성한 그리이스의 유분리성, 산화안정성, 내수성, 혼화안정성, 극압 및 내마모성은 ASTM 및 KS 방법에 준해 시험하였으며, 매우 우수한 특성을 지녔음을 알았다.