Abstract
Fossil fuel depletion and environmental pollution have led to the enforcement of strict regulations. In many countries, there is a need to improve fuel efficiency by more than 40% to achieve the carbon emission reduction target to be imposed in 2025. To improve fuel efficiency, the weight of automobiles is being reduced by using lightweight material such as aluminum or magnesium alloys for the body, developing molding and machining technologies, and optimizing the shape of existing parts. Body weight reduction is the most efficient way to reduce the automobile weight, thereby saving fuel by maximizing the engine efficiency. High strength steel can also be used to save weight, as it can be made thinner, and therefore lighter. Herein, the welding characteristics of SPFC590 1.2 t steel were analyzed. The quality of the resistance spot welded part was predicted by analyzing the dynamic resistance pattern.
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