Dry Sliding Wear Characteristics of Plasma-Nitrocarburized Co – Cr – Mo Alloy

Bayrak, Özgü; Kovacı, H.; Yildiz, F.; Yetim, A.F.; Çelik, A.

doi:10.1007/s11041-017-0089-x

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…Based on related journals, the nitriding process at a temperature of 600 o C with wear resistance testing obtained a wear resistance value of 6.00 x 10 -5 mm 3 /Nm and compared to 1.87 x 10 -7 mm 3 /Nm so that the nitriding results are directly proportional to study. The results of the wear resistance value are lower than previous studies [7,9]. In Table 3.…”

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confidence: 58%

“…So that the wear resistance of nitriding specimens increased compared to as-cast CCM. Based on the previous research, the nitriding process can reduce the wear resistance so that the nitriding results are directly proportional to previous studies which can increase the wear resistance of as-cast CMM [9].…”

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confidence: 83%

“…Otherwise, when using temperatures below 400 o C such as 200 o C-300 o C, the nitriding process is not perfect and the formation of the Cr-N layer has not occurred so that the wear resistance is less than optimal. Based on research before, the most optimal temperature is 500 o C-700ºC to build optimal and perfect Cr-N layer, but in this research chose a temperature variation of 400 o C-600ºC because we were worried that choosing a temperature that was too high would cause the shaft or choosing a temperature that was too low, worried about less than optimal nitriding results so we chose the middle range for this temperature variation [6][7][8][9]. The implant is working at certain chemical and pH conditions, it's depend of the activities in human body.…”

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confidence: 99%

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Manufacture of Wear-Resistant Alloy Co-Cr-Mo for Medical Implant Applications by Nitriding Coating Method

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Nitrogen doped as-cast Co-Cr-Mo alloy with markedly enhanced hardness and wear resistance was successfully produced by pack nitriding process. Nitriding proses used the in-pack process using urea fertilizer as a nitrogen source. It was carried out with variations in temperature of 400°C, 500°C, 600°C and followed by annealing. The wear resistance of the specimen is tested using pin-on-disk. The total sample will be soaked in the lactic acid solution for 3 days. The results obtained from the After nitriding process, the hardness of of speciment N400 obtained a hardness value of 261.54 HV speciment N500 of 309.68 HV, and speciment N600 of 429.14 HV, the results of the hardness value increased in each speciment. The wear resistance value obtained for each speciment N400, N500, N600 is 2,81 x 10-6 mm3/Nm, 7,50 x 10-7 mm3/Nm, 1,87 x 10-7 mm3/Nm. The nitriding process forms a layer on the surface of the as-cast Co-Cr-Mo, it’s called Layer of Cr-N which is the result of heating/decomposing urea fertilizer into nitrogen gas which can coat the surface so that Cr-N bonds are formed in the layer. The thickness of the Cr-N layer on the N400 specimen is 0.28 mm, N500 is 0.35 mm, N600 is 0.38 mm. In addition, the surface results that have been tested for wear resistance form quite fine scratches but the formation of abrasions, such as abrasion, abrasion groove, delamination, and cohesive failure

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confidence: 83%