This paper presents the characterization of a secondary cone crusher concave liner made of Hadfield steel used in Chilean mining after crushing copper minerals during all service life. During use, a cone crusher concave liner suffers indentation (cold working) and abrasion; this combination provides the concave with a layer that constantly renews itself, maintaining a surface highly resistant to abrasive wear. The results presented here were obtained using optical microscopy, microhardness test, measuring abrasion using the dry sand/rubber wheel apparatus, and x-ray diffraction peaks analysis through the classic Williamson–Hall method. After analysis of results, two hardened surfaces have been found—one a product of heat treatment and the other due to deformation during use. This work proposes ways to explain them; the first one uses a thermodynamic model to calculate stacking fault energy, and the second compares the liner with cold-rolled samples.

This article presents the characterization of a gray cast iron with an austenitic matrix subjected to a simulated marine atmosphere. The corrosion process was carried out through the same accelerated corrosion tests which in 40 days evaluate long periods of corrosion (approximately 20 years) in steels. Corrosion products were analyzed by scanning electron microscopy and gravimetric techniques, obtaining curves of corroded thickness over time. The results were compared with previously reported realtime corrosion data for cast austenitic steels and austenitic iron and they show that the corrosion products are consistent with what is reported in the literature, in addition to being comparable with data obtained in a mid-tide marine atmosphere. The experimental results also confirm that the corrosion mechanism is different from that described for steels.