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The Effect of the Composition and Microstructure of Gray Cast Iron on Preferential Wear During Parasitic Drag and on Intrinsic Damping Capacity
Technical Paper
2003-01-3313
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Propensity of cold judder was studied by investigating the correlation between the microstructure of gray iron brake disks and friction properties of commercial brake linings. Based on a brake disk for a mid-size passenger car, gray iron disks with 6 different microstructures were manufactured by changing the carbon equivalent (C.E.) and cooling speed in a commercial manufacturing facility. Graphite morphology of the gray iron changed proportionally according to the C.E. and cooling speeds, exhibiting longer graphite flakes with high C.E. at slow cooling speeds. After screening tests of 23 commercial brake linings, 4 different brake linings (two non-steel and two low-steel linings with high μ and low μ) were selected for parasitic drag tests. Results showed that the preferential disk wear was pronounced in the case of using low steel linings and the trend was marked with the disks containing short graphite flakes. Examination of the disks after the drag tests revealed that the initial DTV (disk thickness variation) pattern was preserved during the wear tests while the intensity of the DTV pattern was increased. Sonic resonance tests were also performed to investigate the effect of gray iron microstructures on vibration damping capacity. Results showed that the graphite morphology strongly affected the vibration damping capacity.
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Authors
- Ho Jang - Department of Materials Science and Engineering, Korea University
- Jang Hyuk Yoon - Department of Materials Science and Engineering, Korea University
- Seong Jin Kim - Department of Materials Science and Engineering, Korea University
- Jae Young Lee - R&D Division for Hyundai Motor Company and Kia Motors Corporation
- Hyun Dahl Park - R&D Division for Hyundai Motor Company and Kia Motors Corporation
Citation
Jang, H., Yoon, J., Kim, S., Lee, J. et al., "The Effect of the Composition and Microstructure of Gray Cast Iron on Preferential Wear During Parasitic Drag and on Intrinsic Damping Capacity," SAE Technical Paper 2003-01-3313, 2003, https://doi.org/10.4271/2003-01-3313.Also In
References
- Terhech M. Manory R.R. Hensler J.H. The Friction and Wear of Automotive Grey Cast Iron under Dry Sliding Conditions Wear 180 1995 73 78
- Rainbolt J. D. Effects of Disk Material Selection on Disk Brake Rotor Configuration SAE Technical Paper 750733
- Kubota M. Hamabe T. Nakazono Y. Fukuda M. Doi K Development of a Light Brake Disk rotor: a Design Approach for Achieving an Optimal Thermal, Vibration and Weight Balance JSAE Review 21 2000 349 355
- Kuylenstierna C. Storstein T. Cost Effective Aluminum MMC Brake Discs SAE Technical Papers 2000-0102763
- Krupka M, Kienzle A. Fiber Reinforced Ceramic Composite for Brake Discs SAE Technical Paper 2000-01-2761
- Lang A. M. An Approach to the Solution of Disk Brake Vibration Problems 1983 223
- Stringham W. Tsang P. Pfeifer J. Wang A. Brake Roughness - Disk Brake Torque Variation, Rotor Distortion and Vehicle Response SAE Technical Paper 930803
- Anderson A.E. Knapp R.A. Hot Spotting in Automotive Friction Systems Intl. Conf. on Wear of Materials 2 1989 673 680
- Lee K. Barber J.R. Friction Excited Thermoelastic Instability in Automotive Disk Brakes ASME J. of Tribology 115 1993 607 614
- Hecht R.L. Dinwiddie R.B. Porter W.D. Wang H. Thermal Transport Properties of Grey Cast Iron SAE Technical Paper 962126
- Okamoto T. Kagawa A Kamei K. Matsumoto H. Effects of Graphite Shape on Thermal Conductivity and Young's Modulus of Cast Iron below 500°C J of the Japan Foundaryman's Society 55 1983 32 36
- Cho M.H. Kim S.J. Basch R.H. Fash J.W. Jang H. Tribological Study of Gray Cast Iron with Automotive Brake Linings: The Effect of Rotor Microstructure Tribology International 36 2003 537 545
- Kim S.J. Cho M.H. Lim D.-S. Jang H. Synergistic Effect of Aramid Pulp and Potassium Titanate Whiskers in the Automotive Friction Material Wear 251 2001 1484 1491
- Daudi A.R. Dickerson W. Ultra Q Process SAE Technical Paper 200-01-2760 2000 59 65
- Cho K.H. Kim Y.M. Internal Friction Change of Al, Mg-alloys in Terms of Casting Method J. Korea. Inst. Met. & Mater. 38 2000 253 259