CAJ | 학술논문

目的研究等离子喷涂TiN/TiO复相陶瓷涂层的微观组织结构、显微硬度及干滑动摩擦磨损行为和机理. 方法采用等离子喷涂技术,在45 #钢表面制备TiN/TiO复相陶瓷涂层. 分析涂层的相组成,测试涂层的硬度. 通过磨损试验研究TiN/TiO复相陶瓷涂层的磨损行为,并观察涂层的磨损形貌,测试磨损表面的成分组成,探讨TiN/TiO复相陶瓷涂层的磨损机理. 结果 TiN/TiO复相陶瓷涂层均匀致密,平均厚度为350 μm,具有明显的层状结构,孔隙率为4. 3%,显微硬度为1444HV0. 1. 在载荷30~50 N、转速370~1102 r/min的范围内,TiN/TiO复相涂层与GCr15对磨的摩擦系数为0. 0963~0. 2778,磨损量为1 . 32~6 . 8 mg. 随着载荷的增加,摩擦系数下降;随着载荷和转速的增加,磨损量增加. 结论等离子喷涂制备的TiN/TiO复相涂层组织致密,显微硬度高,在低速低载荷时表现出较好的耐磨性,但随着载荷和转速的增加,耐磨性降低. 涂层的磨损机制主要为磨粒磨损和粘着磨损.
목적 연구등리자분도TiN/TiO복상도자도층적미관조직결구、현미경도급간활동마찰마손행위화궤리. 방법 채용등리자분도기술,재45 #강표면제비TiN/TiO복상도자도층. 분석도층적상조성,측시도층적경도. 통과마손시험연구TiN/TiO복상도자도층적마손행위,병관찰도층적마손형모,측시마손표면적성분조성,탐토TiN/TiO복상도자도층적마손궤리. 결과 TiN/TiO복상도자도층균균치밀,평균후도위350 μm,구유명현적층상결구,공극솔위4. 3%,현미경도위1444HV0. 1. 재재하30~50 N、전속370~1102 r/min적범위내,TiN/TiO복상도층여GCr15대마적마찰계수위0. 0963~0. 2778,마손량위1 . 32~6 . 8 mg. 수착재하적증가,마찰계수하강;수착재하화전속적증가,마손량증가. 결론 등리자분도제비적TiN/TiO복상도층조직치밀,현미경도고,재저속저재하시표현출교호적내마성,단수착재하화전속적증가,내마성강저. 도층적마손궤제주요위마립마손화점착마손.
Objective To study the microstructure, microhardness as well as dry sliding wear and friction behavior and mecha-nism of plasma sprayed TiN/TiO composite ceramic coating under different conditions. Methods TiN/TiO ceramic coating was pre-pared on 45# steel by reactive plasma spraying technology. Phase composition of the coating was analyzed using X-ray diffraction ( XRD) and the microhardness was measured by a hardness tester. The wear and friction behavior of TiN/TiO composite ceramic coating was studied through wear and friction tests, the wear and friction morphology was observed, the composition of the wear sur- face was tested, and the wear mechanism of TiN/TiO composite ceramic coating was discussed. Results The coating was even and dense with obvious layered structure and an average thickness of 350 μm. The porosity of the coating was 4. 3% and the hardness was 1444HV0. 1. Under the conditions of rotational speed at 370 to 1102 r/min and load at 30 to 50 N, the friction coefficient ranged from 0. 0963 to 0. 2778 and the wear mass loss was from 1. 32 to 6. 8 mg. Besides, the friction coefficient decreased with in-creasing load while the wear mass loss of the coated samples had an increasing trend with the increasing load and rotational speed. Conclusion The coating prepared by plasma spraying was dense with high microhardness. When the load and rotational speed were low, it had excellent wear resistance. However, the wear resistance decreased with increasing load and rotational speed. The main wear mechanisms of the coating were abrasive wear and adhesive wear.