Development and Characterization of Fe-Based Friction Material Made by Hot Powder Preform Forging for Low Duty Applications

A.A.S. Ghazi, K. Chandra, P.S. Misra

Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, India..

DOI: 10.4236/jmmce.2011.1013093                

Abstract

This present paper investigates the friction and wear properties of friction material developed by ‘Hot Powder Preform Forging’ technique. The conventional technique to manufacture Metallo-ceramic brake pads was successfully and economically tried to replace the above process. Compacting and sintering technology suffers from certain major limitations such as inadequate joining of friction element with backing plate, poor density levels achieved in friction element owing to limited application of pressure during compacting, poor thermal conductivity due to high levels of porosity in the product, poor strength due to segregation of the impurities along prior particle boundaries (PPB’s) and, wide variations in final characteristics due to large number of variables involved. In contrast to these limitations, the present technique can offer brake pads of much simpler chemistry but with improved performance on account of simultaneous application of pressure and temperature and with better control of variables. Fade and recovery studies were carried out on a Krauss machine tester following the Economic Commission for Europe Regulation for replacement brake linings (ECE R-90). μ_fade, μ_recovery, μ_performance, % age fade , % age recovery & temperature rise lie within the range for friction materials used for low duty applications. The mechanical properties of these materials were characterized using ASTM standards.

Keywords

Friction material; Preform forging; Brake pads; Fade.

Conflicts of Interest

The authors declare no conflicts of interest.

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