一种超高锰500MPa级低温抗震钢筋及其生产方法
By designing the chemical composition and production process of ultra-high manganese 500MPa grade low-temperature seismic steel bars, the problem of limited Ni resources has been solved, enabling the application of low-cost, high-performance low-temperature steel bars suitable for low-temperature environments such as liquefied natural gas storage tanks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- МААНЬШАНЬ АЙРОН ЭНД СТИЛ КО ЛТД
- Filing Date
- 2025-01-16
- Publication Date
- 2026-07-17
AI Technical Summary
The current low-temperature steel bars use a large amount of Ni, which is costly, and Ni resources are limited, making it difficult to use them widely in low-temperature steel bars. In addition, the existing ultra-high manganese austenitic steel has not been used in rebar, resulting in high production costs and insufficient safety.
The low-temperature seismic steel bar adopts ultra-high manganese 500MPa grade. By controlling the chemical composition and production process, including smelting, LF refining, VD vacuum degassing, continuous casting and bar rolling, the steel bar structure is ensured to be austenitic. V-Nb microalloying is added, and the content of elements such as C, Mn, Si, Al and N is controlled. Combined with the hot-rolled threaded steel rolling process, excellent low-temperature performance is achieved.
It achieves excellent low-temperature performance in the range of -165℃ to -196℃, with high yield strength, good elongation after fracture, low notch sensitivity, lower cost than Ni-based low-temperature steel, and high safety, making it suitable for low-temperature environments such as liquefied natural gas storage tanks.
Smart Images
Figure CN119824317B_ABST