IJBTT

Effect of Cr Content on the Heat-Treatment of the Alloy for Brake Disc

Effect of Cr Content on the Heat-Treatment of the Alloy for Brake Disc
	© 2023 by IJETT Journal
	Volume-71 Issue-1
	Year of Publication : 2023
	Author : Gwanhwi Lee, Kwonhoo Kim, Jong-Deok Lim, Hyun-Jong Kim, Je-Pil Wang
	DOI : 10.14445/22315381/IJETT-V71I1P220

How to Cite?

Gwanhwi Lee, Kwonhoo Kim, Jong-Deok Lim, Hyun-Jong Kim, Je-Pil Wang, "Effect of Cr Content on the Heat-Treatment of the Alloy for Brake Disc," International Journal of Engineering Trends and Technology, vol. 71, no. 1, pp. 217-221, 2023. Crossref, https://doi.org/10.14445/22315381/IJETT-V71I1P220

Abstract
This study was intended to examine the effect of Cr content on heat treatment by adding Fe-Cr alloy to gray cast iron GC250. Designed alloys with Cr content of 0.1%, 0.2%, and 0.3% were cast using a high-frequency induction furnace to determine the change in physical properties according to the amount of Cr added to the ferroalloy. Normalizing was conducted with a box furnace to remove internal stress and control the structure of the ferroalloy, and nitriding heat treatment was conducted using an atmosphere box furnace to improve the surface hardness of the designed alloy. It was confirmed that the optimal conditions for normalizing are a temperature of 930℃, a time of 8hrs, and an airy atmosphere, and the optimal conditions for nitriding heat treatment are a temperature of 560℃, a time of 5hrs, the atmosphere of N2 1.5m3/h, NH3 15m3/h, CO2 0.3m3/h. As a result of comparing the physical properties of ferroalloy according to the Cr content through the above optimal conditions, the designed alloy with a Cr content of 0.1% achieved a tensile strength of 268 MPa and a surface hardness of HBW 251. Compared to gray cast iron GC250, the tensile strength increased by about 58% and the surface hardness by about 21 %.

Keywords
Gray cast iron, Alloy iron, Casting, Heat- treatment, Tensile strength, Brinell hardness.

References
[1] Ma, Jeong-Beom, and Lee, Bong-Gu, “Thermal Behavior of Ventilated Disc Brakes Considering Contact Between Disc and Pad,” Journal of the Korean Society of Manufacturing Technology Engineers, vol. 23, no. 3, pp. 259-265, 2014. Crossref, https://doi.org/10.7735/ksmte.2014.23.3.259
[2] N.Saravana Kumar et al., “Experimental Investigation on Mechanical Behavior of E-Glass and S-Glass Fiber Reinforced with Polyester Resin,” SSRG International Journal of Mechanical Engineering, vol. 5, no. 5, pp. 19-26, 2018. Crossref, https://doi.org/10.14445/23488360/IJME-V5I5P104
[3] Masahiro Kubota et al., “Development of a Light Brake Disk Rotor: a Design Approach for Achieving an Optimal Thermal, Vibration and Weight Balance,” Japanese Society of Automotive Engineers Review, vol. 21, no. 3, pp. 349-355, 2000. Crossref, http://dx.doi.org/10.1016/S0389-4304(00)00050-3
[4] Taein Yeo, “A study on Wear Life Prediction of Disk Brake pads,” KSAE, vol. 10, no. 4, pp. 199-200, 2002
[5] V.Naga Malleswari, and R. Padmini, “Evaluation of Mechanical Properties of Aluminium Metal Matrix Reinforced with Silicon,” SSRG International Journal of Mechanical Engineering, vol. 5, no. 1, pp. 14-18, 2018. Crossref, https://doi.org/10.14445/23488360/IJME-V5I1P103
[6] Armin Yazdanshenas, and Chung-Hyun Goh, “Rockwell Hardness Testing on an Aluminum Specimen Using Finite Element Analysis,” SSRG International Journal of Mechanical Engineering, vol. 7, no. 4, pp. 1-10, 2020. Crossref, https://doi.org/10.14445/23488360/IJME-V7I4P101
[7] Anthony J. Hayter, “A Proof of the Conjecture that the Tukey-Kramer Multiple Comparisons Procedure is Conservative,” Annals of Statistics, vol. 12, no. 1, pp. 61-75, 1984. Crossref, https://doi.org/10.1214/aos/1176346392
[8] K. John Joshua, P. Sherjin, and J. Perinba Selvin Raj, “Analysis of Ball Milled Aluminium Alloy 7068 Metal Powders,” SSRG International Journal of Mechanical Engineering, vol. 4, no. 8, pp. 6-10, 2017. Crossref, https://doi.org/10.14445/23488360/IJME-V4I8P102
[9] S. Chandrasekaran, M. V. Khemchandani, and J. P. Sharma, “Effect of Abrasive Contaminants on Scuffing,” Tribology International, vol. 18, no. 4, pp. 219-222, 1985. Crossref, https://doi.org/10.1016/0301-679X(85)90065-9
[10] Rajneesh Kumar et al., “Evaluation of Mechanical and Microstructural Properties of Cast Iron with Effect of Pre Heat and Post Weld Heat Treatment,” SSRG International Journal of Mechanical Engineering, vol. 4, no. 5, pp. 1-6, 2017. Crossref, https://doi.org/10.14445/23488360/IJME-V4I5P101
[11] Won-jun Cho, A Study on Wear Resistance of Automobile Brake Disc Using Case Hardening, Dong-A University Graduate School of Education, 2015
[12] Robert E. Bechhofer, and Charles W. Dunnett, Percentage Points of Multi-variate Student Distributions, Selected Tables in Thematical Studies, American Mathematical Society, Providenca, R. I., vol.11, pp. 57-87, 1988.
[13] Ko, Y., and Hosoi, K., “Measurements of Power Losses in Automobile Drive Train,” SAE Paper, 1984. Crossref, https://doi.org/10.4271/840054
[14] A.V.L.N.S.H.Hariharan, and Shaik Lakshman, “Analysis of Heavy Metals in the Vicinity of FACOR, Vizianagaram Dt.(AP),” SSRG International Journal of Applied Chemistry, vol. 7, no. 1, pp. 56-59, 2020. Crossref, https://doi.org/10.14445/23939133/IJAC-V7I1P111