摘要
文章主要介绍了包钢轨梁厂为满足市场需求,研制开发公路桥梁伸缩缝用异型钢(π 型钢).为提高公路桥梁伸缩缝装置的安全性,自主设计了牌号BG355BRE稀土钢,以提高钢材强韧性指标.针对π型钢断面复杂,轧制过程中变形不均匀严重的情况,设计了专用的孔型系统.在生产过程中,通过对孔型的优化设计和合理分配各道次压下量,有效解决了不对称断面轧制弯曲问题.成品各项力学性能均满足技术协议要求,外形尺寸及表面质量满足用户使用要求,实现了批量供货.
Abstract
In this paper, it is mainly introduced the research and development of figured steel for expansion joint of highway bridge (π profile steel) in Rail and Beam Rolling Plant of Baotou Steel to meet the market demands. In order to improve the safety of expansion joint device of highway bridge, the BG355BRE rare earth steel is designed independently to improve strength and toughness of steel. The special pass system is designed aiming at the complex cross section of π pro-file steel and seriously uneven deformation during rolling process. In the production process, the problem of rolling bending for asymmetric cross section are effectively solved by optimizing pass design and distributing rolling reduction of every pass reasonably. All the mechanical properties of finished products could meet the requirements of technical agreement as well as dimension and surface quality could meet the operating requirements of users so that batch supply is realized.
维普
万方数据