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http://dx.doi.org/10.26748/KSOE.2018.32.6.492

Variations in Tribology Factors of SM45C by UNSM Modification  

Shim, Hyun-Bo (School of Mechanical Engineering, Yeungnam University)
Suh, Chang-Min (School of Mechanical Engineering, Kyungpook Nat'l University)
Suh, Min-Soo (Korea Institute of Energy Research)
Amanov, Auezhan (Department of Mechanical Engineering, Sun Moon University)
Pyun, Young-Sik (Department of Mechanical Engineering, Sun Moon University)
Publication Information
Journal of Ocean Engineering and Technology / v.32, no.6, 2018 , pp. 492-501 More about this Journal
Abstract
The following results were obtained from a series of studies to accumulate data to reduce the coefficient of friction for press dies by performing tribological tests before and after the UNSM treatment of SM45C. The UNSM-treated material had a nano-size surface texture, high surface hardness, and large and deep compressive residual stress formation. Even when the load was doubled, the small amount of abrasion, small weight of the abrasion, and width and depth of the abrasion did not increase as much as those for untreated materials. When loads of 5 N, 7.5 N, and 10 N were applied to the untreated material of SM45C, the coefficient of friction was approximately 0.76-0.78. With the large specimen, a value of 0.72-0.78 was maintained at a load of 50 N despite the differences in the size of the wear specimen and working load. Tribological tests of large specimens of SM45C treated with UNSM under tribological conditions of 100 N and 50 N showed that the frictional coefficient and time constant stably converged between 0.7 and 0.8. The friction coefficients of the small specimens treated with UNSM showed values between 0.78 and 0.75 under 5 N, 7.5 N, and 10 N. The friction coefficients of the SM45C treated with UNSM were comparable to each other.
Keywords
Tibology; Press die; SM45C; Surface hardness; Ultrasonic nanocrystal surface modification; Friction coefficient;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Amanov, A., Cho, I.S., Pyoun, Y.S., Lee, C.S., Park, I.G., 2012. Micro-dimpled Surface by Ultrasonic Nanocrystal Surface Modification and its Tribological Effects. Wear, 286-287.
2 Amanov, A., Cho, I.S., Sasaki, S., 2014. The Influence of DLC Coating on the Mechanical and Frictional Properties of Unpeened and Peened Cu-based Bimetal under Dry Sliding Conditions. Materials Chemistry and Physics, 143, 814-824.   DOI
3 Chun, M.S., Kim, M.H., Kim, W.S., Kim, S.H., Lee, J.M., 2009. Experimental Investigation on the Impact Behavior of Membrane Type LNG Carrier Insulation System. Journal of Loss Prevention in the Process Industries, 22(6), 901-907.   DOI
4 Gim, J.S., Jeong, Y.T., 2007. Introduction to PVD/PACVD Coating. Journal of the Korean Society for Precision Engineering, 24(5), 7-13.
5 Jeon, Y.J., Kim, S.H., Yoon, K.T., Heo, Y.M., Lee, T.G., 2014. Indirect Prediction of Surface Damage for a Press Die with Wear Characteristics and Finite Element Stamping Analysis. Transactions of Materials Processing, 23(1), 29-34.   DOI
6 Kim, B.C., Yoon, S.H., Lee, D.G., 2011. Pressure Resistance of the Corrugated Stainless Steel Membranes of LNG Carriers. Ocean Engineering, 38, 592-608.   DOI
7 Kim, H.S., Chun, M.S., Lee, J.M., Kim, M.H., 2013. A Comparative Evaluation of Fatigue and Fracture Characteristics of Structural Components of Liquefied Natural Gas Carrier Insulation System. Journal of Pressure Vessel Technology, 135(2), 021405.   DOI
8 Kim, M.H., Lee, S.M., Lee, J.M., Noh, B.J., Kim, W.S., 2010. Fatigue Strength Assessment of MARK-III Type LNG Cargo Containment System. Ocean Engineering, 37, 1243-1252.   DOI
9 Lee, S.C., Kim, J.H., Kim, H.D., Choi, G.S., Amanov, A., Pyun, Y.S., 2015. Changes in Mechanical Properties of WC-Co by Ultrasonic Nanocrystal Surface Modification Technique. Journal of The Korean Society of Tribologists and Lubrication Engineers, 31(4), 157-162.   DOI
10 Pyun, Y.S., Suh, C.M., Yamaguchi, T., Im, J.S., Kim, J.H., Amanov, A., Park, J.H., 2012. Fatigue Characteristics of SAE52100 Steel via Ultrasonic Nanocrystal Surface Modification Technology. Journal of Nanoscience and Nanotechnology, 12, 6089-6095.   DOI
11 Yu, Y.H., Kim, B.G., Lee, D.G., 2013. Cryogenic Reliability of the Sandwich Insulation Board for LNG Ship. Composite Structures, 95, 547-556.   DOI
12 Suh, C.M., Nahm, S.H., Kim, J.H., Pyun, Y.S., 2016. A Study on the VHCF Fatigue Behaviors of Hydrogen Attacked Inconel 718 Alloy. Transactions of the Korean Society of Mechanical Engineers A, 40(7), 637-646.   DOI
13 Suh, C.M., Song, G.H., Suh, M.S., Pyoun, Y.S., 2007. Fatigue and Mechanical Characteristics of Nanostructured Tool Steel by Ultrasonic Cold Forging Technology. Materials Science and Engineering: A, 443(1-2), 101-106.   DOI