Abstract
In order to produce high HAZ toughness steel plates with tensile strength of 490MPa to 590MPa class, the innovative technology for HAZ microstructure refinement, HTUFF®, has been developed. Fine dispersion of oxides and/or sulfides in steel has been tried to retard y grain growth in the HAZ near a weld fusion line. It has been discovered that very small oxides and/or sulfides with sizes of several 10nm to several 100nm can be dispersed in steel by the appropriate addition of Mg and/or Ca into steel. Utilizing these fine particles containing Mg or Ca, the strong pinning technology to retard y grain growth in a HAZ has been commercially established. Based on the concept of HTUFF providing excellent HAZ toughness, high-performance structural steel plates have been mass-produced.
| Original language | English |
|---|---|
| Pages (from-to) | 2-6 |
| Number of pages | 5 |
| Journal | Nippon Steel Technical Report |
| Issue number | 90 |
| Publication status | Published - Jun 1 2004 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry