Quick Search:       Advanced Search
徐健晏,孔德军.激光热喷涂Co30Cr8W1.6C3Ni1.4Si涂层在PAO+2.5%MoDTC油中摩擦学特性[J].稀有金属材料与工程(英文),2021,50(5):1542~1548.[Xu Jianyan and Kong Dejun.Tribological Characteristics of Laser Thermal Sprayed Co30Cr8W1.6C3Ni1.4Si Coating in PAO+2.5wt% MoDTC Oil[J].Rare Metal Materials and Engineering,2021,50(5):1542~1548.]
Tribological Characteristics of Laser Thermal Sprayed Co30Cr8W1.6C3Ni1.4Si Coating in PAO+2.5wt% MoDTC Oil
Download Pdf  View/Add Comment  Download reader
Received:April 20, 2020  
DOI:
Key words: laser thermal spraying (LTS)  Co30Cr8W1.6C3Ni1.4Si coating  PAO+2.5wt% MoDTC oil  coefficient of friction (COF)  wear mechanism
Foundation item:
Author NameAffiliation
Xu Jianyan and Kong Dejun  
Hits: 24
Download times: 23
Abstract:
      To elevate the wear resistance of TC4 alloy, Co30Cr8W1.6C3Ni1.4Si coating was fabricated on the surface by laser thermal spraying (LTS). The morphologies and phases of obtained coatings were analyzed by scanning electronic microscope (SEM) and X-ray diffraction (XRD), respectively. The friction and wear properties of the coatings in poly-alpha-olefin (PAO)+2.5wt% molybdenum dithiocarbamate (MoDTC) oil were investigated by wear tester. The results show that the laser thermal sprayed Co30Cr8W1.6C3Ni1.4Si coatings are primarily composed of Ti, WC1-x, CoO, Co2Ti4O and CoAl phases, and the metallurgical bonding forms at the coating interface. The average coefficient of friction (COF) of Co30Cr8W1.6C3Ni1.4Si coatings fabricated at the laser power of 1000, 1200 and 1400 W is 0.151, 0.120, and 0.171 with corresponding wear rate of 1.17×10-6, 1.33×10-6 and 2.80×10-6 mm3·N-1·m-1, respectively, which increases with the increase of laser power. The wear mechanism is abrasive wear, and the dendrite size is the dominant role of anti-wear.