CAJ | 학술논문

以激光熔覆铁基涂层为研究对象，在MM-P2屏显式摩擦磨损试验机上进行摩擦磨损对比实验，分析了不同工艺参数下熔覆层形貌及熔覆涂层后磨损量的变化关系.结果表明：熔覆涂层后的表面硬度均在62HRC以上，远高于基体的硬度；熔覆层的形貌和质量主要影响因素是扫描速度，激光功率次之，并在此基础上采用能量密度进行表征，能量密度为60 J/mm2左右时的耐磨性最好，其最佳组合工艺参数为激光功率3.2 kW 左右、扫描速度300 mm/min左右.激光功率过高，扫描速度过快都会导致熔覆层耐磨性能下降.
이격광용복철기도층위연구대상，재MM-P2병현식마찰마손시험궤상진행마찰마손대비실험，분석료불동공예삼수하용복층형모급용복도층후마손량적변화관계.결과표명：용복도층후적표면경도균재62HRC이상，원고우기체적경도；용복층적형모화질량주요영향인소시소묘속도，격광공솔차지，병재차기출상채용능량밀도진행표정，능량밀도위60 J/mm2좌우시적내마성최호，기최가조합공예삼수위격광공솔3.2 kW 좌우、소묘속도300 mm/min좌우.격광공솔과고，소묘속도과쾌도회도치용복층내마성능하강.
Comparative experiments of friction and wear were performed on MM-P2-screen friction and wear tester using laser cladding iron-based coating as the object of study. The morphology of cladding layer under different process parameters were studied by analyzing the changes of wear amount and cladding coating. The results show that the surface hardness are above 62 HRC after cladding coating, far higher than the hardness of substrate. Scanning speed and laser power are the most important factors affecting the morphology and quality of cladding layer. Energy density characterization results show the best abrasion resistance occurs when the energy density is around 60 J/mm2. The scope of the optimal process parameters are: laser power approximately 3.2 kW, the scanning speed around 300 mm/min. The results show that too high laser power and scanning speed also decrease the abrasion resistance of cladding layer.