| Autor: |
Ji Bin Liu, Kai Miao, Rong Dong Han, Wen Yan Liu, Ping He Li, Lai Wang |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Materials Science Forum. :910-914 |
| ISSN: |
1662-9752 |
| DOI: |
10.4028/www.scientific.net/msf.575-578.910 |
| Popis: |
Microstructures and toughness of simulated coarse grain heat-affected zone of hot continuously rolled copper-bearing steel were investigated using physical simulation. The results showed that brittlement is easy to happen in the region of CGHAZ with slower thermal cycles (t8/5≥45s). Granular bainite transformed from austenite led to brittlement. The dimensions of granular martensite and austenite (M-A) constituents are main factors influencing the impact toughness. There is no visible effect on the toughness when the dimensions of M-A constituents are less than 1μ m. However, the toughness decreases greatly once the dimensions exceed 1μ m. Therefore, decreasing the dimensions of M-A constituents by controlling weld heat input will do good to improve the impact toughness of copper-bearing steel. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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