분말 야금에 의해 소결된 강철의 트라이볼로지 특성 향상
Improvement in Tribological Properties of Carbon Steel Sintered by Powder Metallurgy
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초록
Materials manufactured by powder metallurgy (PM) are widely used in various applications such as water pump, shock absorber, and airplane components due to the reduction in the cost and weight. In this study, tribological properties of carbon steel subjected by surface treatment were investigated. The main purpose is to increase the strength and improve the tribological properties by reducing pores that formed by PM. Moreover, the surface treatment was carried out at room and high temperatures (RT and HT). The surface roughness of the untreated (NON) and treated (AFTER) samples was measured. It was found that the surface roughness was reduced after both the RT AFTER and HT AFTER compared to RT NON sample. The tribological properties of the samples were performed against bearing steel ball under dry conditions. The friction coefficient of the RT NON samples was reduced by 22% and 56% RT AFTER and HT AFTER, respectively. The wear volume of the RT NON sample was also reduced by 43% and 87% RT AFTER and HT AFTER, respectively. Tribocorrosion tests were also performed and it was found that the surface of the RT AFTER, HT AFTER samples was less corroded compared to RT NON sample. The HT AFTER sample demonstrated a relatively higher corrosion potential in comparison with the RT AFTER samples. Hence, it was confirmed that after surface modification the surface roughness and hardness of the samples were significantly improved resulting in improvement in tribological and tribocorrosion behaviors of PM carbon steel.
Abstract
Materials manufactured by powder metallurgy (PM) are widely used in various applications such as water pump, shock absorber, and airplane components due to the reduction in the cost and weight. In this study, tribological properties of carbon steel subjected by surface treatment were investigated. The main purpose is to increase the strength and improve the tribological properties by reducing pores that formed by PM. Moreover, the surface treatment was carried out at room and high temperatures (RT and HT). The surface roughness of the untreated (NON) and treated (AFTER) samples was measured. It was found that the surface roughness was reduced after both the RT AFTER and HT AFTER compared to RT NON sample. The tribological properties of the samples were performed against bearing steel ball under dry conditions. The friction coefficient of the RT NON samples was reduced by 22% and 56% RT AFTER and HT AFTER, respectively. The wear volume of the RT NON sample was also reduced by 43% and 87% RT AFTER and HT AFTER, respectively. Tribocorrosion tests were also performed and it was found that the surface of the RT AFTER, HT AFTER samples was less corroded compared to RT NON sample. The HT AFTER sample demonstrated a relatively higher corrosion potential in comparison with the RT AFTER samples. Hence, it was confirmed that after surface modification the surface roughness and hardness of the samples were significantly improved resulting in improvement in tribological and tribocorrosion behaviors of PM carbon steel.
참고문헌 (11)
- Ishizaki, K., "Mechanically enhanced open porous materials by a HIP process", J. Ceram, 98(8), pp.533~540 (1990)
- Takegoshi, E., "A study on effective thermal conductivity of porous metals", JSME(B), 58(547), pp.879~884 (1992)
- Yajun, Y., "A constitutive theory for the damage of materials with dynamic micro void evolution processes", JSME Int. J. (A), 41(1), pp.61~78 (1998)
- Yin, Y., "Deformation and damage characteristics of porous materials under different triaxialities", JSME Int. J. Series(A), 41(1), pp.79~95 (1998)
- 노준석, "SLM방식으로 출력된 STS 316L의 기계적 및 마찰 · 마모특성에 미치는 UNSM처리 후 영향에 관한 연구", 한국트라이볼로지학회지, 34(6), pp.270~278 (2018), 한국트라이볼로지학회[DOI]
- He, Y., "Study of the austenitic stainless steel with gradient structured surface fabricated via shot peening", Mater. Lett, 215, pp.187~190 (2018)
- Auezhan Amanov, "Increase in Strength and Fretting Resistance of Alloy 718 Using the Surface Modification Process", Materials, 11(8), pp.1366~ (2018), MDPI AG[DOI]
- Amanov, A., "Tribology International Effects of Ultrasonic Nanocrystalline Surface Modification(UNSM)Technique on the Tribological Behavior of Sintered Cu-Based Alloy", Tribol. Int, 72, pp.187~197 (2014)
- So, H., "Formation and wear mechanism of tribo-oxides and the regime of oxidational wear of steel", Wear, 253(9-10), pp.1004~1015 (2002)
- Gwidon, W., "Engineering Tribology", pp.399~ (2005), Butterworth-Heinemann
- Amanov, A., "Effect of Local Treatment Temperature of Ultrasonic Nanocrystalline Surface Modification on Tribological Behavior and Corrosion Resistance of Stainless Steel 316L Produced by Selective Laser Melting", Surf. Coat. Technol, 398, pp.126080~ (2020)