(1. 西南交通大學 材料先進技術教育部重點實驗室 摩擦學研究所，成都 610031；
2.中國鐵建重工集團有限公司，長沙 410100；
3. 上海核工程研究設計院，上海 200233)
摘 要: 在臥式高溫微動磨損試驗機(PLINT TE77)上，采取線接觸方式，研究690合金傳熱管/405不銹鋼抗振條在干態(tài)不同溫度下的切向微動磨損特性。在試驗參數(shù)為法向載荷40 N、位移幅值100 μm、頻率5 Hz和循環(huán)次數(shù)1×105次的條件下，分別在25、90、200和285 ℃這4種不同溫度下進行切向微動磨損試驗。結(jié)果表明：微動工況均處于滑移區(qū)，90 ℃時穩(wěn)態(tài)摩擦因數(shù)最高；當溫度升高到200和285 ℃時，摩擦因數(shù)經(jīng)過下降期后出現(xiàn)一個更加明顯的下降階段，這與界面的高溫氧化有關。磨損機制是磨粒磨損、氧化磨損和剝層，磨痕表面在低溫(25和90 ℃)時的氧化程度比高溫(200和285 ℃)時的嚴重。90 ℃時的磨損量比其他溫度時的都高，這可能與界面水蒸氣蒸發(fā)和表面摩擦氧化有關。
關鍵字: 690合金；抗振條；微動磨損；蒸汽發(fā)生器；傳熱管
（1. Tribology Research Institute, Key Laboratory of Advanced Materials Technology,
Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;
2. China Railway Construction Heavy Industry Co., Ltd., Changsha 410100, China;
3. Shanghai Nuclear Engineering Research and Design Institute, Shanghai 200233, China）
Abstract:Tangential fretting wear characteristics of alloy 690 tubes against 405 stainless steel plates were studied on a fretting wear tester (PLINT TE77) under the dry condition at different temperatures by linear contact. At the test parameters, such as normal load of 40 N, displacement amplitude of 100 μm, frequency of 5 Hz and cycle number of 1×105, the fretting wear test were carried out at 25, 90, 200 and 285 ℃. The results show that, the fretting condition are all running in gross slip regime. The friction coefficient at 90 ℃ reaches the highest steady state value, and it occurs a more obvious decrease stage after a period of decline while the temperature increases to 200 and 285 ℃, which is related with the high-temperature oxidation at the interface. The wear mechanisms are complex with abrasive wear, oxidation wear and delamination. The oxidation of the worn surface at low temperatures (25 and 90 ℃) is more serious than that at high temperatures (200 and 285 ℃). The wear volume at 90 ℃ is higher than that at the other temperatures, this may be related with the water vapor at the interface and the oxide film at the surface.
Key words: alloy 690; fretting wear; anti-vibration strip; steam generator; heat transfer tube
