Preparation and Microstructural Characterization of a High-Cr White Cast Iron Reinforced with WC Particles

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Moreira, AB (Author) FEUP; Laura Ribeiro (Author) FEUP; Lacerda, P (Author) Other; Sousa, RO (Author) Other; Pinto, AMP (Author) Other; Vieira, MF (Author) FEUP

Journal

Title: Materials

Vol. 13

Final page: 2596

ISSN: 1996-1944

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00S-7X2

DOI: 10.3390/ma13112596

Abstract (EN): High-chromium white cast iron (WCI) specimens locally reinforced with WC-metal matrix composites were produced via an ex situ technique: powder mixtures of WC and Fe cold-pressed in a pre-form were inserted in the mold cavity before pouring the base metal. The microstructure of the resulting reinforcement is a matrix of martensite (alpha') and austenite (gamma) with WC particles evenly distributed and (Fe,W,Cr)(6)C carbides that are formed from the reaction between the molten metal and the inserted pre-form. The (Fe,W,Cr)(6)C precipitation leads to the hypoeutectic solidification of the matrix and the final microstructure consists of martensite, formed from primary austenite during cooling and eutectic constituent with (Fe,Cr)(7)C-3 and (Fe,W,Cr)(6)C carbides. The presence of a reaction zone with 200 mu m of thickness, between the base metal and the composite should guarantee a strong bonding between these two zones.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15