With the increasing requirements for reducing the weight and emission of automobiles, the automobile manufacturers turn to use the high strength steel. Car chassis as an important component has complex shape and is di...With the increasing requirements for reducing the weight and emission of automobiles, the automobile manufacturers turn to use the high strength steel. Car chassis as an important component has complex shape and is difficult to form. As the strength of design steel strength increases from about 400MPa to 590MPa, the steel hole expansion rate becomes a crucial indicator which needs to be over 75%.展开更多
文摘With the increasing requirements for reducing the weight and emission of automobiles, the automobile manufacturers turn to use the high strength steel. Car chassis as an important component has complex shape and is difficult to form. As the strength of design steel strength increases from about 400MPa to 590MPa, the steel hole expansion rate becomes a crucial indicator which needs to be over 75%.
