摘要
文章对HRB500E∮6mm的螺纹盘条塑性指标最大力总伸长率Agt不合格原因,从炼钢控制(化学成分)、轧钢控制工艺、生产过程(经验)、试样制备、与强度关系对比等方面进行了分析,得出最大力总伸长率Agt与抗拉强度呈线性增加关系,搭接点处的冷却速率慢而使抗拉强度低,断裂在搭接点处,但临近搭接点处的其他强度高的部位塑性延伸变形小,是导致最大力总伸长率Agt低的主要原因。
This paper analyzes the unqualified factors of threaded rod’s maximum total elongation(HRB500 E ∮6 mm) from the following aspects which are the steelmaking control(chemical component), the steel rolling process, the production process, the preparation of samples, and the relationship with strength contrast. It is concluded that because of the slow cooling rate at the lap point,the grain structure changes at the lap point, which leads to the low tensile strength of the lap point, while the high tensile strength near the lap point leads to smaller elongation, which eventually leads to the lower maximum total elongation.
出处
《科技创新与应用》
2020年第18期117-118,共2页
Technology Innovation and Application
