Transactions of Materials and Heat Treatment

Title：Frictional characteristic and surface film analysis on powder lubrication of warm forming interface

Authors： Liu Fuchun1 Chang Jingjing2 Wang Wei2 Gu Wei2

Unit： 1.Anhui Jianghuai Automobile Co. Ltd. Hefei 230009 China 2. Institute of Tribology Hefei University of Technology Hefei 230009 China

KeyWords： warm forming powder lubrication friction coefficient surface film surface evaluation

ClassificationCode：

year,vol(issue):pagenumber：2016,41(1):111-115

Abstract：

In the warm forming process, the traditional oil and grease have been unable to achieve effective lubrication and even lost the ability of lubrication because of the requirements of high temperature and large pressure. However, the advantage of powder lubrication is obvious, and it is widely used in the warm forming based on static load characteristics and environmental adaptability. The experiment of power lubricating characteristics at a certain temperature was carry out to research the influence of load and rotate speed on powder lubricating characteristics by the multi-function environment controllable friction and wear testing machine. Then the coefficient of friction and condition of lubricating film surface were analyzed and evaluated. The results show that the powder lubrication can work normally under low load condition, and the sample does not wear seriously. The friction coefficient decreases with the load increases properly, so the sample has a sharp worn surface. A good anti-friction effect is realized by proper increasing of the speed. Under the equal load, improving rotate speed can accelerate the wear.

Funds：

国家自然科学基金资助项目（51475135）；博士后基金一等资助项目（2014M550339）；清华大学摩擦学国家重点实验室开放基金重点项目（SKLTKF13A02）

刘付春（1975-）,男, 硕士，工程师

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