Texture, microstructure and microhardness evolution of a hot-rolled high chromium cast iron

Authors

Guoliang Xie, University of Science and Technology Beijing
Jingtao Han, University of Science and Technology Beijing
Jing Liu, University of Science and Technology Beijing
Zhengyi Jiang, University of WollongongFollow

RIS ID

33798

Publication Details

Xie, G., Han, J., Liu, J. & Jiang, Z. (2010). Texture, microstructure and microhardness evolution of a hot-rolled high chromium cast iron. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 527 (23), 6251-6254.

Abstract

A sandwich-structured bimetallic blank containing high chromium cast iron (HCCI) and low carbon steel (LCS) claddings was newly prepared by composite casting, and then the blank was hot-rolled into composite plate. The evolution of microstructures, phase constituents and texture components of hot-rolled HCCI was analyzed. During hot rolling, the eutectic carbides of M₇C₃ were broken and partly dissolved into the austenitic matrix, resulting in the precipitation of secondary carbides of M₂C during air cooling. Significant refinement of austenitic grains and carbides are discovered in hot-rolled HCCI specimens. The hardness of hot-rolled HCCI increases from around 600.5 to 850–900 HV due to the large carbides volume fraction, indicating a high strength and good wear resistance of hot-rolled HCCI. Strong orientation densities at {1 1 0}〈4 9 0〉, {1 1 1}〈1 1 0〉, {0 0 1}〈1 4 2〉 and {1 1 2}〈1 1 0〉 location are found after hot rolling.