CAJ | 학술논문

采用高精度微动磨损试验机SRV Ⅳ研究蒸汽发生器传热管材料Inconel600合金在不同位移幅值下的微动磨损行为,分析了位移幅值对摩擦因数和磨损体积的影响.采用光学显微镜和扫描电子显微镜观察磨损表面和截面的形貌,并用透射电子显微镜对摩擦学转变组织进行观察.结果表明：随位移幅值的增加,摩擦因数和磨损体积逐渐增大,材料的微动行为先后经历以黏着为主的部分滑移区以及滑动为主的完全滑移区；磨损机制也由黏着磨损逐步转变为氧化磨损和剥层磨损的共同作用；微裂纹出现在黏着区域和滑动区域的交界处以及滑动区域内；黏着区氧分布密度和磨痕外基体的相一致,氧化主要发生滑动区域；磨痕亚表层的组织发生了严重的塑性变形,产生纳米化现象,摩擦学转变组织的晶粒尺寸约100 nm,远小于原始组织的15~30μm.
채용고정도미동마손시험궤SRV Ⅳ연구증기발생기전열관재료Inconel600합금재불동위이폭치하적미동마손행위,분석료위이폭치대마찰인수화마손체적적영향.채용광학현미경화소묘전자현미경관찰마손표면화절면적형모,병용투사전자현미경대마찰학전변조직진행관찰.결과표명：수위이폭치적증가,마찰인수화마손체적축점증대,재료적미동행위선후경력이점착위주적부분활이구이급활동위주적완전활이구；마손궤제야유점착마손축보전변위양화마손화박층마손적공동작용；미렬문출현재점착구역화활동구역적교계처이급활동구역내；점착구양분포밀도화마흔외기체적상일치,양화주요발생활동구역；마흔아표층적조직발생료엄중적소성변형,산생납미화현상,마찰학전변조직적정립척촌약100 nm,원소우원시조직적15~30μm.
The fretting wear behavior of Inconel600 alloy for steam generator heat exchange tubes at different displacement amplitudes was investigated with a SRV IV fretting tester. The effects of displacement amplitude on the friction coefficient and wear volume were analyzed. The worn surface and subsurface morphology were observed by optical microscopy and scanning electron microscopy, and the tribological transformed structure was observed by transmission electron microscopy. It was found that the friction coefficient and wear volume increased with the displacement amplitude, and the fretting wear mode gradually transformed from mainly adhesion of the partial slip regime to absolutely slide of the gross slip regime. The wear mechanism correspondingly gradually changed from adhesive wear to a combination of oxidation and delamination wear. Microcracks were observed at the junction of the adhesion zone and the slide zone and in the whole slide zone of the wear scar. The oxygen distribution density in the adhesion area was almost the similar as the matrix located outside the wear scar, and oxidation mainly occurred in the sliding zone. Severe plastic deformation appeared just under the wear scar, resulting in its nanolization. The grain size in the tribological transformed structure layer was about 100nm, much smaller than 15 to 30 μm of the original grain size.