一、序言钢的延展性一般随强度的提高而下降。过去,高强度钢板多用作对焊接性及韧性较为重视的厚结构件,而对薄板所注重的延展性却研究得较少,尤其是对高强度钢板的延展性与强化方式之间的关系所作的研究似乎更少。但是,在最近的汽车行业中,以节省燃料费用和提高安全性为目的,正在使用高强度钢板。而为了合理地使用这种高强度钢板,重要的是必须明确钢的强化方式与延展性之间的关 First, the preface The ductility of steel generally decreases with the increase of strength. In the past, high-strength steel is often used as a thick structural member for weldability and toughness, but less attention has been paid to the ductility of the thin-plate, especially regarding the relationship between ductility and strengthening of high-strength steel The study seems to be less. However, in the recent automotive industry, high-strength steel sheets are being used for the purpose of saving fuel costs and improving safety. In order to reasonably use this high-strength steel plate, it is important to clarify the relationship between the strengthening method of steel and ductility