Pressler® HFL Vacuum Heating Furnace Hot Pressing Line
The core technology of Pressler's vacuum heating furnace hot pressing production line lies in creating a vacuum environment for the metal sheet heating process, maximizing the prevention of oxidation phenomena that are prone to occur during the heating process of metal sheets.
This technology can be widely applied to automotive hot pressing parts manufacturing, suitable for various materials such as bare plate door rings, laser welded plates, and unequal thickness plates. By combining bare plate vacuum hot forming with electro-galvanizing process, electro-galvanizing treatment can be directly performed after hot forming without shot blasting operations, effectively avoiding workpiece deformation caused by shot blasting, while significantly improving the corrosion resistance of parts. This technology can be widely applied to automotive hot pressing parts, aircraft industry titanium forming parts, and other metal hot pressing processing fields.
Oxidation-free heating process
During the heating process, a vacuum environment is created for the metal sheet heating process, maximally preventing the oxidation phenomenon that is very prone to occur during the heating process of metal sheets.
Bare plate heating can be achieved
Compared with ordinary hot forming lines, Pressler's vacuum hot forming line can achieve bare plate heating, widely applicable to bare plate door rings, laser welded blanks, unequal thickness plates and other bare plate hot forming, resulting in fewer oxide scales on automotive parts.
Significantly reduce the risk of delayed cracking in hot-formed steel parts
After vacuum hot forming, the electro-galvanized parts undergo dehydrogenation treatment at 190°C/2h, resulting in a diffusion hydrogen content of only 0.2 ppm (tested at 300°C, 20min). Subsequent strict SEP 1970 standard tests (including U-bend, constant load, and acidic four-point bend tests) have all confirmed that the parts show no hydrogen embrittlement cracking. Further testing according to SEP 1970 standards, including 30-day U-bend tests, 96-hour constant load tests, and 120-hour four-point bend tests in 0.1 mol/L HCl solution, all indicate that the specimens show no hydrogen embrittlement cracking.
High degree of automation
Adopting a highly automated process, from raw material input, galvanizing treatment to finished product output, reduces errors in manual operation and production processes, greatly improving production efficiency.
Can produce 2000MPa hot-formed steel parts
2000MPa ultra-high strength parts manufactured by PRESSLER vacuum hot forming equipment can significantly reduce the risk of hydrogen embrittlement delayed cracking in aluminum-silicon coated and galvanized parts, while galvanized parts have excellent corrosion resistance and welding performance.
Vacuum Heating Furnace
Pressler independently developed, designed, and manufactured the world's first vacuum hot pressing production line, with invention patents applied for in mainland China, the United States, Germany, and other places. The produced hot-formed parts have better bending angles, excellent welding performance, less oxide scale, and no shot blasting required.
Main Features
- Less oxide scale on vacuum hot-formed parts;
- Compared to aluminum-silicon coated parts, bare plates using vacuum hot forming technology have better welding performance;
- Using bare plate 22MnB5 as raw material + TWB (laser welding), lower cost;
- Electro-galvanized parts after hot forming do not require shot blasting, avoiding shot blasting deformation issues, and additionally increasing corrosion resistance.