Metal-Matrix Composites and Thermal Spray Coatings for Earth Moving Machines

Weaver, D. Trent ; Kiser, Matthew T. ; Hawk, Jeffrey

Caterpillar Inc.

关键词: Modifications;    Abrasives;    Steels;    Testing;    Wear Resistance;   

DOI  :  10.2172/816484
RP-ID  :  NONE
RP-ID  :  FC26-01NT41054
RP-ID  :  816484

美国|英语

来源: UNT Digital Library

【 摘 要 】

In the eighth quarter, investigations in both thrusts focused on abrasive wear characterization. For the steel matrix composites, various systems were tested at DOE Albany Research Center using wear tests which produced low stress scratching, high stress gouging, and gouging and impact wear. Based on the wear results, it is uncertain as to whether the composites created have sufficient wear resistance to provide a 2x life increase in a selectively reinforced component in all applications. High stress component abrasive wear tests were conducted at Caterpillar on arc lamp processed, thermal sprayed components. Testing showed that in many cases, arc lamp processing parameters and resulting fusion were insufficient to prevent coating spallation. Of those coatings which experienced only limited spallation, wear life improvements approached 2x and it is expected that project goals can be met with additional process modifications. An overview of the progress during the 8th quarter of this project is given below. Additional research details are provided in the limited rights appendix to this report.