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在控制法向载荷分别为20、50和80 N,位移幅值分别为80、150和200μm的两种不同环境下,以Si3N4陶瓷球/Inconel690平面接触的方式,在PLINT高温微动试验机上进行微动腐蚀试验,循环次数为2×104。结果表明:在滑移区,当载荷、位移幅值一定时,相同温度联氨溶液中的稳态摩擦因数比其在蒸馏水中高;稳态摩擦因数随溶液的温度增加而增加;磨损体积随溶液温度增加而增加。Inconel 690在联氨溶液摩擦过程中,磨损程度除受到位移幅值、荷载影响以外,温度对磨损体积有显著影响。温度的增加即降低溶液的溶解氧又促进联胺与溶解氧的吸收反应,起到降低氧化腐蚀的作用。在蒸馏水中Inconel 690合金材料的磨损机制主要为磨粒磨损和剥层,而在联氨溶液中其磨损机制主要为裂纹伴随磨粒磨损和剥层。
Under the control of normal loads of 20, 50 and 80 N and displacement amplitudes of 80, 150 and 200 μm, respectively, in a two-dimensional environment with Si3N4 ceramic balls / Inconel690 in plane contact, a PLINT high temperature micro-dynamic testing machine Fretting corrosion test, the number of cycles is 2 × 104. The results show that steady-state friction coefficient in hydrazine solution with the same temperature is higher than that in distilled water when the amplitude of load and displacement is constant in slip zone. The steady-state friction coefficient increases with the increase of solution temperature. Increased temperature increases. Inconel 690 in the hydrazine solution friction process, in addition to the degree of wear by the displacement amplitude, load, the temperature on the wear volume have a significant impact. The increase of temperature reduces the dissolved oxygen of the solution and promotes the absorption reaction between hydrazine and dissolved oxygen, thereby reducing the oxidative corrosion. The wear mechanism of Inconel 690 alloy in distilled water is mainly abrasive wear and delamination, while the wear mechanism of Inconel 690 alloy is mainly accompanied by abrasive wear and delamination in the hydrazine solution.