Abstract
AbstractNowadays, hot forming steel plate is widely used in the main parts of automobile with the characteristic of high strength, high hardness, light weight, strong forming ability, small rebound and so on, and meet the requirements of automobile lightweight and crash safety. But the hot forming steel plane is a whole martensite structure whose physical metallurgical behavior in the process of resistance spot welding compared with ordinary high strength steel is larger, and softening and splashing of the heart affected zone may occur during welding. Due to the high strength of ultra-high strength steel materials, the mechanical properties of spot welding structure are also different with ordinary steel, we need to study the mechanical properties such as strength analysis. In the papers, providing a certain reference value for the subsequent development of models through the hot forming solder joint failure mechanism research, solder joint failure simulation verification, older joint failure simulation test structural optimization to improve the failure of hot solder joint, and real vehicle verification of the effectiveness of the optimization scheme.KeywordsHot formingSolder joint failurePassive safetyStructure optimization
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