• Title, Summary, Keyword: Abrasive wear

Search Result 263, Processing Time 0.043 seconds

Study on Abrasive Wear Behaviour of a Carbon Fiber Composites (탄소 섬유 강화 고분자 복합재의 연삭마모 특성에 관한 연구)

  • Koh, S.W.;Yang, B.C.;Kim, H.J.;Kim, J.D.
    • Journal of Power System Engineering
    • /
    • v.10 no.1
    • /
    • pp.46-51
    • /
    • 2006
  • Present study was investigated the effect of the particle of the counterface of unidirectional carbon fiber reinforced composite. The friction coefficient of composite and the specific wear rate different sliding velocity were measured for this materials. The friction track of counterface was observed by an optical microscope and scanning electron microscope. There were insignificant effects of the specific wear rate under lower Sic abrasive particle, however it showed high effect on $30{\mu}m$ abrasive particle size. There were significant effects of friction and wear behavior of the fiber direction under 0.3m/s sliding speed. Major failure mechanisms can be classified such as microfracture, plowing, microcutting, cutting and cracking.

  • PDF

The Wear Behavior and Cutting Characteristics of Coated Tools (코팅공구의 마모 및 절삭특성)

  • 정진혁;윤형석;최덕기;주종남
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.3-8
    • /
    • 1996
  • To enhance the cutting performance of the tool, single or multilayer coating is applied on the substrate of the tool. Coating material reduces cutting force and heat generation in tool-chip contact zone and enhances resistance against abrasive wear. This paper presents that the effect of different coatings on abrasive wear resistance varies with work material and the flank wear rate is different with depth of cut. Crater wear rate is also found to decrease with higher thermal diffusivity of coating material. It is verified that the estimated thermal diffusivity of multilayer coating has consistent effect on the crater wear.

  • PDF

A study on abrasive wear characteristics of side plate of FRP ship (FRP 선박 외판재의 연삭마모 특성에 관한 연구)

  • Kim, Byung-Tak;Koh, Sung-Wi
    • Journal of the Korean Society of Fisheries and Ocean Technology
    • /
    • v.44 no.3
    • /
    • pp.250-256
    • /
    • 2008
  • Generally the side plate materials of FRP ship are composed of glass fiber and unsaturated polyester resin composites(GFRP composites). In this study, the effect of applied load and sliding speed on friction and wear characteristics of these materials were investigated at ambient temperature by pin-on-disc friction test. The cumulative wear volume, friction coefficient and wear rate of these materials for SiC abrasive paper were determined experimentally. The cumulative wear volume showed a tendency to increase nonlinearly with increase of sliding distance and was dependent on applied load and sliding speed for these composites. The friction coefficient of GFRP composites was increased as applied load increased at same sliding speed in wear test. It was verified by SEM photograph of worn surface that major failure mechanisms were microfracture, deformation of resin, cutting and cracking.

INVESTIGATIONS ON THREE-BODY ABRASIVE WEAR BEHAVIOUR OF SILICON CARBIDE AND GRAPHITE FILLED GLASS-VINYL ESTER COMPOSITES

  • Suresha, B.;Chandramohan, G.;Siddaramaiah, Siddaramaiah;Lee, Joong- Hee
    • Proceedings of the KSME Conference
    • /
    • /
    • pp.148-153
    • /
    • 2007
  • The effect of silicon carbide (SiC) and graphite fillers incorporation on the abrasive wear behaviour of glass-vinyl ester (G-V) composites have been investigated. The three-body abrasive wear behaviour was assessed by rubber wheel abrasion tests (RWAT). The worn surfaces were examined using scanning electron microscopy (SEM). The addition of SiC and graphite fillers in G-V composite improves the abrasion resistance under different loads/abrading distances. The SEM studies indicate the reasons for failure of composites and influencing parameters.

  • PDF

A Study on the Abrasive Wear Properties of the PTA Overlay Layers using the Super Alloy Powder (초내열합금분말에 의한 PTA 오버레이부의 연삭 마모 특성 연구)

  • Kim, Young-Sik;Choi, Young-Gook;Lim, Chang-Hoon;Kim, Jong-Do
    • Journal of Welding and Joining
    • /
    • v.27 no.3
    • /
    • pp.80-84
    • /
    • 2009
  • The Plasma Transferred Arc (PTA) overlay welding method is lately introduced as one of the most useful surface overlay method of the engine component. In this paper, the overlay welding on the SNCrW heat resisting alloy was conducted by the PTA overlay welding process using the super alloy powder. The characteristics of the overlay layers were investigated through the metallurgical and abrasive test. Experimental results showed that the overlay on the SNCrW heat resisting alloy surface was successfully made without hot cracking. The friction wear characteristics of the Co-base Stellite 6 overlayer were most superior. However the abrasive wear characteristics were most inferior in the Co-base Stellite 6 overlayer.

Low streee Abrasive Wer mechanism of the Iron/Chromium Hardfacing Alloy (저응력하의 철/크롬 올버레이합금의 긁힘마모기구)

  • 백응률
    • Journal of Welding and Joining
    • /
    • v.16 no.2
    • /
    • pp.73-83
    • /
    • 1998
  • This study investigated the relationships between the microstructure and the wear resistance of hardfaced iron/chromium alloys to examine the low stress abrasive wear mechanism. The effects of volume fraction of reinforcing phases(chromium carbide and eutectic phase) were studied. The alloys were deposited once or twice on a mild steel plate using a self-shielding flux cored arc welding process. The low stress abrasion resistance of he alloys against dry sands was measured by the Dry Sand/Ruber Wheel Abrasion Tester (RWAT). The wear resistance of hypoeutectic alloys, below 0.36 volume fraction of chromium-carbide phase (VFC), behaved as Equal Pressure Mode (EPM) for the inverse rule of mixture whereas the wear resistance of hypereutectic alloys, above 0.36 VFC, represented Equal Wear Mode (EWM) for the linear rule of mixture.

  • PDF

Wear Characteristics of the Extruded Bars of Hypereutectic Al-Si Alloy Powders produced by Rapid Solidification Process (급속응고법으로 제조한 과공정 Al-Si합금분말 압출재의 마멸특성)

  • Ahn, Young-Nam;Cho, Gue-Serb;Ra, Hyung-Yong
    • Journal of Korea Foundry Society
    • /
    • v.14 no.5
    • /
    • pp.447-454
    • /
    • 1994
  • Wear resistance and wear mechanism of hypereutectic Al-($15{\sim}40$)wt%Si alloys were investigated. Primary Si particles under $20{\mu}m$ size were formed in hypereutectic Al-Si alloy powders due to rapid solidification. But the Si particles of extruded bars were finely distributed in smaller size than that of atomized powders. The wear mechanism of hypereutectic Al-Si alloys was divided into three types of wear phenomena, which were abrasive wear, delamination wear and severe adhesive wear according to sliding speed and load. At low sliding speed and load, wear mechanism was abrasive wear, so Al-15wt%Si alloy showed the best wear resistance. At high sliding speed and load, wear mechanism was adhesive wear, and Al-40wt%Si alloy showed the best wear resistance.

  • PDF

Resistance to Abrasive Wear of Materials Used as Metallic Matrices in Diamond Impregnated Tools

  • Konstanty, Janusz;Kim, Tai-Woung;Kim, Sang-Beom
    • Proceedings of the Korean Powder Metallurgy Institute Conference
    • /
    • /
    • pp.1132-1133
    • /
    • 2006
  • Metal-bonded diamond impregnated tools are being increasingly used in the processing of stone and ceramics, road repair, petroleum exploration, etc. Although the main tool wear mechanisms have been identified, the scientific background is inadequate and fundamental research has to be carried out to better understand the tool field behaviour. This work addresses the complex issues of modelling abrasive wear of the metallic matrix under laboratory conditions. The generated data indicates that the matrix wear resistance can be assessed in a simple manner; whereas tests carried out on diamond impregnated specimens may aid prediction of the tool life in abrasive applications.

  • PDF

Experimental Study on Wear Characteristics of Metallic Materials used in Oil Sands Plants (오일샌드 플랜트용 금속소재의 마모 특성에 대한 실험적 연구)

  • Won, Sung-Jae;Cho, Seung-Hyun;Kang, Dae-Kyung;Heo, Joong-Sik
    • Tribology and Lubricants
    • /
    • v.33 no.1
    • /
    • pp.31-35
    • /
    • 2017
  • Recently, international attention has been focused on the development of non-traditional energy resources such as shale gas and oil sands, due to the steep increase in the demand for natural resources. The materials incorporated in an oil gas plant module experience extreme environments, and are prone to various problem such as fracture, corrosion and abrasion due to low-temperature brittleness. In order to improve the plant life, it is necessary to perform characteristics study and performance evaluation of the materials. In particular, this paper explains the main set of materials which are most frequently used in oil sands plant project. In order to investigate wear characteristics, the authors carried out abrasive wear tests of TP 316, stainless steel and SS 400, structural rolled steel. For the analysis of the abrasive wear resistance of an oil sands plant, the authors carried out the test according to ASTM G 105 "Standard Test Method for Conducting Wet Sand/Rubber Wheel Abrasion Test" standard guidelines. The authors have derived the results from the data associated with the loss of mass with respect to wear rate. During the test, for a given wear length for 10,000 revolutions, the rotational speed and applied force of the rubber wheel were varied.

An Experimental Study on the Effect of Contaminated Lubricants on Wear Characteristics (오염된 윤활유가 마멸특성에 미치는 영향에 관한 실험적 연구)

  • Kim, Hae-Won;Hong, Jae-Hak
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.7 no.2
    • /
    • pp.113-123
    • /
    • 1990
  • To study deleterious effects of contaminants contained in lubricating systems, the effects of fine alumina particle concentration and size on the critical failure load, friction and wear characteristic were examined on boundary lubrication condition using the four ball machine. The following conclusions are deduced: The abrasive is found to cause a transition from mild wear to severe wear at less severe conditions than with clean oil. In mild wear region the friction and wear increase with particle size and concentration, but in severe wear region do not exhibit any definite trend. In relation to film thinckness there is a threshold of particle size beyond which the failure load no longer decreases with particle size.

  • PDF