Affiliation:
1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, China
2. National and Local Joint Engineering Research Center for Advanced Solidification Forming and Equipment Technology of Metals, Kunming, China
Abstract
To improve the adaptability to complex shaped products, TiC particulates (TiCp) reinforced high-manganese steel matrix (TiCp/HMS) composites were prepared by the squeeze casting infiltration method, and the microstructure and the mechanical properties of the composites were investigated, with different TiCp volume fractions (35%, 50%, 65%). Water glass was applied as binder in the TiCp preforms, in which iron powder was added to adjust the TiCp fractions, and Si powder to activate the bonding of TiCp/steel interface. The results showed that with the increase of the volume fraction, the hardness of the composites increases gradually, with the highest reaching 60.7 HRC at 65 % TiCp, which is 2.7 times that of the matrix. However, the bending strength decreases gradually, with the maximum 439.0 MPa obtained at 35% TiCp. The impact toughness of the composites changes slightly. Due to the use of water glass, brittle glass phase is formed at the TiCp/steel interface, which reduces the mechanical properties of the composites. The addition of Si powder can improve the comprehensive mechanical properties of the composites.
Funder
National Natural Science Foundation of China
Major Science and Technology Projects in Yunnan Province