激光表面改性對牽引系數的影響研究

李正陽 蔡寶春

摘 要：該報告研究了激光表面改性技術形成的規(guī)則、宏觀耐磨形貌對提高油潤滑條件下牽引系數的影響，分析了小尺度滾滑摩擦磨損試驗機、高速輪軌黏著試驗臺和實際輪軌接觸潤滑狀態(tài)之間的相似律。研究結果表面，激光表面改性技術可以有效地在輪軌表面形成具有宏觀性、規(guī)則性和高耐磨性的表面形貌。該表面形貌可以有效地增加列車的牽引系數。通過相似律分析表明，小尺度低速滾滑摩擦磨損試驗機不能模擬實際高速列車輪軌接觸水潤滑狀態(tài)，而大型高速輪軌粘著試驗臺是在實驗室研究實際高速輪軌關系的有效工具。

關鍵詞：激光表面改性 牽引系數 相似律

Abstract：This project investigates the effect of regular， wear resistant and macro-morphology， which formed by laser surface modification， on traction coefficient under oil lubrication. The similarity law of lubrication state among the small scale rolling-sliding wear test machine， high-speed wheel-rail adhesion coefficient test machine and real high-speed wheel-rail contact is analyzed. It is concluded that the small scale rolling-sliding wear test machine cannot simulate the water lubrication state of real high-speed wheel-rail contact， while high-speed wheel-rail adhesion coefficient test machine can do it and the latter is a useful tool to investigate the real high-speed wheel-rail contact.

Key Words：Laser surface modification；Traction coefficient； Similarity law

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