激光表面改性對(duì)牽引系數(shù)的影響研究

李正陽(yáng) 蔡寶春

摘 要：該報(bào)告研究了激光表面改性技術(shù)形成的規(guī)則、宏觀耐磨形貌對(duì)提高油潤(rùn)滑條件下牽引系數(shù)的影響，分析了小尺度滾滑摩擦磨損試驗(yàn)機(jī)、高速輪軌黏著試驗(yàn)臺(tái)和實(shí)際輪軌接觸潤(rùn)滑狀態(tài)之間的相似律。研究結(jié)果表面，激光表面改性技術(shù)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(shù)。通過(guò)相似律分析表明，小尺度低速滾滑摩擦磨損試驗(yàn)機(jī)不能模擬實(shí)際高速列車輪軌接觸水潤(rùn)滑狀態(tài)，而大型高速輪軌粘著試驗(yàn)臺(tái)是在實(shí)驗(yàn)室研究實(shí)際高速輪軌關(guān)系的有效工具。

關(guān)鍵詞：激光表面改性 牽引系數(shù) 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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