热冲压成形钢横梁开裂原因OA

A batch of reinforcing cross beams for an automotive battery pack top cover,made from an 1 800 MPa hot-stamped material,exhibited widespread cracking during the stamping process.To investigate the root cause of this cracking,a comprehensive analysis was conducted using macroscopic observation,scanning electron microscopy,metallographic examination,mechanical property testing,and chemical composition analysis.The results revealed that condensation formed on the die surface,producing a significant amount of moisture.During hot stamping,hydrogen atoms diffused into the material,ultimately causing hydrogen embrittlement and resulting in cracking of the components after forming.