Abstract
A method of high temperature thermo-mechanical treatment (TMT) and subsequent cold (heat) treatment was applied to a novel ultra-high-strength steel (G33 steel). The effect of different process parameters on microstructure and mechanical properties of quasi-static (10-3s-1) tensile samples of G33 steel was investigated. The results show that the optimum treatment process of G33 steel is high temperature (1078℃) TMT with 50% deformation + cooled at -73℃ for 1h + tempered at 200℃ for 2h, and after the process, the yield strength of G33 steel is 1685MPa, the ultimate tensile strength is 2130MPa, and the total elongation is 14.0%.
| Original language | English |
|---|---|
| Pages (from-to) | 37-41 |
| Number of pages | 5 |
| Journal | Cailiao Gongcheng/Journal of Materials Engineering |
| Volume | 44 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 20 May 2016 |
Keywords
- Thermo-mechanical treatment
- Total elongation
- Ultra-high-strength steel
- Yield strength