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FRICTION STIR PROCESSING TiB2 INTO THE SURFACE OF CLASS 40 GREY CAST IRON TO IMPROVE THE WEAR RESISTANCE


EMSL Project ID
16302

Abstract

The objective of this work is to use Friction Stir Processing (FSP) to improve the wear resistance of class 40 grey cast iron. FSP is used to process TiB2 particulate into the surface of the cast iron to produce a wear resistant layer. The optimization of the process was achieved by placing TiB2 powders on the surface of a cast iron plate then covering the powder with a 0.080 in thick mild steel sheet and subsequently plunging and translating a stir tool across the surface. Microstructural characterization of the optimized welds was carried out using optical, SEM and TEM. At the temperature of processing, TiB2 reacts with the cast iron to form TiC in a solid state. Comparison before and after the process show significant wear and deformation of the PCBN step spiral pin tool. Data on the wear characteristics and friction coefficient of Friction Stir Processed, TiB2 reinforced cast iron will also be presented.

Project Details

Project type
Exploratory Research
Start Date
2005-08-10
End Date
2006-08-14
Status
Closed

Team

Principal Investigator

Uma Ramasubramanian
Institution
South Dakota School of Mines and Technology

Team Members

Glenn Grant
Institution
Pacific Northwest National Laboratory