Rolling发表评论(0)编辑词条

Rolling is a fabricating process in which the metal, plastic, paper, glass, etc. is passed through a pair (or pairs) of rolls. There are two types of rolling process, flat and profile rolling. In flat rolling the final shape of the product is either classed as sheet (typically thickness less than 3 mm, also called "strip") or plate (typically thickness more than 3 mm). In profile rolling the final product may be a round rod or other shaped bar, such as a structural section (beam, channel, joist etc). Rolling is also classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is termed as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is termed as cold rolling. Another process also termed as 'hot bending' is induction bending, whereby the section is heated in small sections and dragged into a required radius.

轧钢　steel rolling
　　轧钢的定义：在旋转的轧辊间改变钢锭，钢坯形状的压力加工过程叫轧钢。轧钢的目的与其他压力加工一样，一方面是为了得到需要的形状，例如：钢板，带钢，线材以及各种型钢等；另一方面是为了改善钢的内部质量，提高钢的力学性能。
　　我们常见的汽车板、桥梁钢、锅炉钢、管线钢、螺纹钢、钢筋、电工硅钢、镀锌板、镀锡板包括火车轮都是通过轧钢工艺加工出来的。
　　轧钢的分类：轧钢方法按轧制温度不同可分为热轧与冷轧；按轧制时轧件与轧辊的相对运动关系不同可分为纵轧，横轧和斜轧；按轧制产品的成型特点还可分为一般轧制和特殊轧制。周期轧制，旋压轧制，弯曲成型等都属于特殊轧制方法。
　　此外，由于轧制产品种类繁多，规格不一，有些产品是经过多次轧制才生产出来的，所以轧钢生产通常分为半成品生产和成品生产两类。
　　我国大钢厂从70年代已用先进的连轧轧机 ，连轧机采用了一整套先进的自动化控制系统，全线生产过程和操作监控均由计算机控制实施，轧件在几架轧机上同时轧制，大大提高了生产效率和质量。
　　国内轧钢行业要真正做大做强，必须不断对钢坯质量、加热、辊型控制、卷取能力、酸洗等系列环节加强。另外，做重型机械的一重、二重、上重、太重等必须奋起，探索高精轧钢设备。国内宝钢、鞍钢、武钢、首钢设计院，东大、北科大等院校轧钢研究机构亦要多加强与钢铁集团的联合开发。