Elsevier

Wear

Volumes 162–164, Part B, 13 April 1993, Pages 790-801
Wear

Repeated impact-abrasion testing of alloy white cast irons

https://doi.org/10.1016/0043-1648(93)90080-6Get rights and content

Abstract

A small Hazemag rotary impact crusher has been adapted for the assessment of the repeated impact-abrasion properties of alloy white cast irons. The test specimens were cast as blow bars for use in the crusher, and each test involved the comminution of 2000 kg of quarry stone. A series of six alloy white cast irons has been tested in the crusher in order to assess the influences of chemical composition, hardness, eutectic carbide volume fraction and retained austenite content on combined repeated impact-abrasion performance. The results showed that hardening by heat treatment, and hence variations in retained austenite content, had no influence on weight loss, but that weight loss increased significantly with increasing eutectic carbide volume fraction. Post-wear examination of worn blow bars revealed significant gouging and impact damage on the surface, and on a finer scale, extensive fracture of eutectic carbides, decohesion at carbide/matrix interfaces, matrix fracture, and microscopic spall formation.

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