Modified hot work die steel and method for producing the same
By utilizing the synergistic effect of CeO2 and TiC, and employing low-temperature ball milling and powder addition methods, the inclusions and primary carbides in H13 steel were modified and refined. This solved the problem of performance degradation of H13 steel under high-temperature impact and thermal fatigue, and improved the strength and toughness of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUIZHOU UNIV
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
Harmful inclusions and coarse primary carbides in existing H13 steel are difficult to control effectively, leading to a decline in material properties, especially a shortened lifespan under high-temperature impact and thermal fatigue conditions.
By employing the synergistic effect of CeO2 and TiC, nanoparticles are pre-dispersed and mixed through low-temperature ball milling, pressed into powder blocks, and then added to molten steel. Combined with ultrasonic or mechanical stirring, this achieves simultaneous modification and refinement of inclusions and primary carbides.
It significantly improves the microstructure uniformity and comprehensive mechanical properties of H13 steel, enhances tensile strength, yield strength and toughness, and extends service life.
Smart Images
Figure CN122406079A_ABST