Compared with cold stamping, hot stamping has obvious technical advantages, mainly in the following aspects:
1. Ultra-high-strength body parts can be obtained, which can reduce the thickness of the parts, reduce the number of body reinforcement plates, improve the collision performance of the body, and achieve effective weight reduction of the body;
2. The formability is relatively good;
3. The tonnage of the equipment required for stamping is small, generally a high-speed hydraulic press of 800t can meet the needs of hot stamping of most body parts;
4. The dimensional accuracy is good, and the strength of the hot stamping part is about 1500MPa with almost no rebound, which was unimaginable before the invention and application of the new steel hot stamping technology. The strength of cold stamping parts is only about 600MPa, but there is obvious rebound;
5. The surface hardness, concave resistance and rigidity of the parts are good;
6. The shape design of the parts can be simplified.
