强迫宽展在翼板钢和窄带钢生产中的应用

发布时间：2018-06-28 12:29

本文选题：窄带钢 + 翼板钢　；参考：《山东大学》2015年硕士论文

【摘要】：金属塑性成形是金属成形中的一个重要方面。金属塑性成形的方法有轧制、铸造、锻造、拉拔等,其中,轧制具有生产效率高、产品种类多、生产成本低、适合于大规模生产等特点,故成为金属塑性成形的最重要的方法。据相关资料介绍,90%以上的钢都是通过轧制成材。轧制就是靠两支旋转的轧辊与轧件之间形成的摩擦力将轧件拖进辊缝之间,并使轧件高度方向上受到压缩而产生塑性变形的过程。轧制过程除使轧件获得一定形状和尺寸外,还必须使组织和性能得到一定程度的改善。根据生产过程中轧件温度的不同,轧制又可以分为热轧和冷轧。热轧是在再结晶温度以上进行的轧制,需将坯料送入到加热炉中加热或电磁加热到一定温度,然后进入轧机进行轧制。本文主要介绍了热轧窄带钢和热轧翼板钢生产过程中强迫宽展的应用。在轧制过程中轧件的高度方向承受轧辊压缩作用,压缩下来的体积,将按照最小阻力法则沿着纵向及横向移动。沿横向移动的体积所引起的轧件宽度的变化称为宽展。在窄带钢和翼板钢生产过程中,经常采用强迫宽展的方法,以达到小规格坯料生产较宽规格产品或一种孔型可生产几种坯料的目的。宽展是一个极其复杂的轧制现象,在轧制过程中受到较多非定量因素的影响,目前,没有一种理论或者公式可以对宽展得出精确的数据结果。应用范围较广的几种宽展公式也是在简化或者忽略了一些因素后,针对某种特定的生产方式得出相准确的数据,故对宽展的应用大都采用经验数据的办法。本文以150mm× 150mm连铸坯在520粗轧机生产线上轧制翼板钢的粗轧孔型设计和200mm×200mm、165mm×225mm、165mm×280mm三种连铸坯在650粗轧机生产线轧制窄带钢的粗轧孔型设计为研究对象,通过强迫宽展的办法进行工艺和孔型设计,一方面实现了小规格坯料轧制较宽规格产品的目的,另一方面解决了孔型共用性的问题,大幅度地降低了生产成本,对轧钢厂具有良好的经济效益。
[Abstract]:Metal plastic forming is an important aspect of metal forming. The methods of metal plastic forming include rolling, casting, forging, drawing and so on. Among them, rolling has the characteristics of high production efficiency, variety of products, low production cost and suitable for mass production, so it has become the most important method of metal plastic forming. According to relevant data, more than 90% of the steel is rolled. Rolling is the process of drawing the piece into the gap of the roll by the friction formed between the two rotating rolls and the workpiece, and resulting in plastic deformation in the direction of the height of the rolling piece. In addition to obtaining certain shape and size, the structure and properties must be improved to a certain extent in the rolling process. According to the different temperature in the production process, rolling can be divided into hot rolling and cold rolling. Hot rolling is carried out above recrystallization temperature. It is necessary to feed the billet into heating furnace or electromagnetic heating to a certain temperature, and then enter the rolling mill for rolling. This paper mainly introduces the application of forced spread in the production of hot rolled narrow strip steel and hot rolled flange steel. In the rolling process, the height of the workpiece is subjected to roll compression, and the compressed volume will move along the longitudinal and lateral direction according to the minimum resistance rule. The change in the width of the rolled piece caused by the volume moving laterally is called spread. In the process of production of narrow strip steel and flange steel, the method of forced spread is often used in order to achieve the purpose of producing several kinds of billets with small size billets or one pass. The spread is an extremely complex rolling phenomenon, which is influenced by many non-quantitative factors in the rolling process. At present, there is no theory or formula to obtain accurate data results for the spread. After simplifying or neglecting some factors, several kinds of broad-spread formulas which are widely used can get accurate data according to a particular mode of production, so most of the applications of broad-spread are based on empirical data. In this paper, the rough-rolling pass design of 150mm 脳 150mm continuous casting billet rolling flange steel on 520 roughing mill production line and the rough rolling pass design of 200mm 脳 200mm / 165mm 脳 225mm / 165mm 脳 280mm continuous casting billet rolling narrow strip steel in 650mm roughing mill production line are studied. The process and pass design are carried out by the method of forced expansion. On the one hand, the purpose of rolling the products of wider specification with small blank is realized, on the other hand, the problem of common pass is solved, and the production cost is greatly reduced. It has good economic benefit to the rolling mill.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG335

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