(1. 西南交通大學(xué) 牽引動力國家重點(diǎn)實(shí)驗室，成都 610031；
2. 西南交通大學(xué) 生命科學(xué)與工程學(xué)院，成都 610031)
摘 要: 采用PLINT高溫微動磨損試驗機(jī)，研究核電用管材Incoloy800合金的高溫微動磨損機(jī)制和動力學(xué)特性。Incoloy800合金圓管試件與0Cr18Ni9不銹鋼配副件圓柱體在水平面上垂直交叉接觸，控制法向載荷為80 N、位移幅值為2~20 μm、循環(huán)次數(shù)為3×104次，在不同溫度(25 ℃、300 ℃和400 ℃)下進(jìn)行微動磨損試驗。結(jié)果表明：當(dāng)載荷、溫度一定時，隨著位移幅值的增大，Incoloy800合金的微動運(yùn)行經(jīng)歷從部分滑移區(qū)向混合區(qū)和滑移區(qū)規(guī)律性的轉(zhuǎn)變。溫度升高并未對微動運(yùn)行的區(qū)域特性以及部分滑移區(qū)的穩(wěn)態(tài)摩擦系數(shù)產(chǎn)生顯著影響，但在混合區(qū)和滑移區(qū)，穩(wěn)態(tài)摩擦系數(shù)隨溫度的升高而明顯降低。Incoloy800合金的高溫微動磨損機(jī)制主要表現(xiàn)為摩擦氧化、磨粒磨損與剝層的共同作用。
關(guān)鍵字: 核電材料；Incoloy800合金；蒸汽發(fā)生器；高溫；微動磨損
（1. National Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;
2. School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031,China）
Abstract:The fretting wear behavior of nuclear power material Incoloy800 was investigated by PLINT high temperature fretting tester with the Incoloy800 cylinder against 0Cr18Ni9 cylinder at vertical cross contact under different temperatures (25, 300 and 400 ℃). During testing, the normal load of 80 N was applied, the displacement amplitudes were from 2 μm to 20 μm, and the number of fretting cycles was 3×104. The fretting wear mechanism at high temperature and kinetic character of Incoloy800 steam generator tube materials were analyzed. The results show that the fretting course of Incoloy800 is transformed from partial slip regime into mixed fretting regime and gross slip regime by its fretting behavior with increasing displacement amplitude under the same normal load and temperature. Increasing temperature has no significant effect on fretting regime features and friction coefficients of partial slip regime, however, the friction coefficients decrease with the increase of temperature in mixed fretting regime and gross slip regime. The friction oxidation, abrasive wear and delamination are main fretting wear mechanisms of Incoloy800 at high temperature.
Key words: nuclear power material; Incoloy800 alloy; steam generator; high temperature; fretting wear
