High-strength steel stamping die
Shen Jia Hydraulic
Release Time:
2025-06-06
Today, high-strength steel and ultra-high-strength steel have effectively achieved vehicle lightweighting, improving vehicle collision strength and safety performance, thus becoming an important development direction for automotive steel materials. However, as the strength of the sheet increases, traditional cold stamping processes are prone to cracking during forming and cannot meet the processing requirements of high-strength steel plates. When forming conditions cannot be met, the international community has gradually researched hot stamping forming technology for ultra-high-strength steel plates.
Today, high-strength steel and ultra-high-strength steel have effectively achieved vehicle lightweighting, improving vehicle collision strength and safety performance, thus becoming an important development direction for automotive steel materials. However, as the strength of the sheet metal increases, traditional cold stamping processes are prone to cracking during forming and cannot meet the processing requirements of high-strength steel plates. When forming conditions cannot be met, the international community has gradually researched hot stamping technology for ultra-high-strength steel plates.
This technology is a new process that integrates forming, heat transfer, and microstructural phase transformation. It mainly utilizes the increased plasticity and reduced yield strength of the sheet metal in the high-temperature austenitic state to form the material through molds. However, hot forming requires in-depth research on process conditions, metal phase transformations, and CAE analysis technology. This technology is monopolized by foreign manufacturers, and domestic development is slow. In the past, when producing deep-drawn or heavily drawn parts, it was widely believed that pressure-resistant (EP) lubricants were the best choice to protect molds. Sulfur and chlorine EP additives have been mixed into pure oils to extend mold life for a long time. However, with the emergence of new metals—high-strength steel—and stricter environmental requirements, the value of EP-based lubricants has diminished and even lost market share.
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