Effect of C Content on Properties and Microstructure of Steel-Bonded Cemented Carbide GT35 Produced by In Situ Reduction of Ilmenite
| Periodical | Materials Science Forum (Volumes 610 - 613) |
|---|---|
| Main Theme | Materials Research |
| Edited by | Zhongwei Gu, Yafang Han, Fusheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou |
| Pages | 687-691 |
| DOI | 10.4028/www.scientific.net/MSF.610-613.687 |
| Citation | Yi Wu et al., 2009, Materials Science Forum, 610-613, 687 |
| Online since | January, 2009 |
| Authors | Yi Wu, Xin Wang, Fei Long, Yu Fang Shen, Zheng Guang Zou |
| Keywords | C Content, GT35, Ilmenite, Mechanical Property, Microstructure |
| Price | US$ 28,- |
Steel-bonded cemented carbide GT35 was fabricated from natural ilmenite by in-situ carbothermic reduction and vacuum pressureless sintering. The effects of C content on the mechanical properties and microstructures of GT35 composites were investigated. As an excellent reducer, carbon provides an impetus for a series of reductive process. C content determines the melting point of the steel matrix, and directly affects the mechanism of dissolving and segregating of TiC particles, forming a netlike microstructure. Besides, the liquid steel whose viscosplasticity is determined by C content was coated on the surface of the composite and refrained the release of CO. The results showed that the good mechanical properties of steel-bonded cemented carbide GT35 composite were obtained with 0.9wt.% C at the same sintering conditions and the density reached 6.12g/cm3, the average bending strength was over 1229MPa after heat treatment, the mean hardness HRC was 69.4. It also showed that in-situ reduction of natural limonite was a feasible way to fabricate good performance GT35 composite with a relatively low cost.
