材料加工专业英语2期末复习总结

材料加工专业英语期末复习总结二、段落翻译：Unit 8 Hot strip Rolling(热带钢轧制)2.Semi-Continuous Hot-Strip Mills 半连续热带轧机Such installations generally consist of two or more slab reheat furnace, a two-high scale-breaker (and/or a hydraulic descaling unit), a powerful reversing roughing stand. A finishing train with four or more 4-high standards, a long run -out table and one or more coilers.这类生产线主要包括两座或者更多座板坯加热炉，二辊除磷机（和/或：高压水除磷机），大功率的可逆式粗轧机。

4机架或多机架精轧机，长输出辊道以及一台或多台卷取机。

This arrangement is primarily intended for production rates about 1.5 to 2 million tons per year and where the slabs to be rolled have a comparatively low weight per unit width. It is a very flexible arrangement and can permit a varying number of roughing passes. Accordingly, it can accept slab of different steel grades and thicknesswhich require rolling with different number of roughing passes.这种布置主要是为了年产量每年约150万至200万吨，在这种情况下，要轧制的板坯，在单位宽度上：重量相对较低。

这种布置非常灵活，可以进行不同数量的粗轧。

因此，它可以接受不同钢种和不同厚度的、并且粗轧道次要求不同的板坯。

This type of mill, however, is not particularly suitable for rolling slabs of large weight per unit widths as the length of the mill required for such workpiece becomes very extended and the capital cost per annual ton of output become very high. When rolling specific-weight slab, the total roughing time in the reversing rougher usually exceeds the rolling time in the finishers, making the reversing rougher the limiting factor in output calculation.然而，这种轧机并不特别适轧制单位宽度重量较大的轧制板，因为这种工件所需的生产线很长，而且吨钢产量投资成本会很大。

在轧制稍微重点的板坯时：粗轧轧制的时间往往超过精轧时间，这使得：可你式粗轧机成为限制产量的一大因素。

3.Semi-Continuous Three-Quarter Hot-Strip Mills 3/4半连轧热带轧机A mill of this type is characterized by the use of a powerful reversing rougher followed by one or more nonreversing roughing stands. This arrangement provides a very flexible installation because of its ability to roll slabs of a wide variety of steel grades and thinking (250mm). It is more important that the rolled bar or with certain thick and convex for finishing mill is got through the roughing mill, so finishing mill is easily operation and products’ size being accuracy. It also offer high outputs associated with various kinds of steel and, the rolling of a slab of specific weight 18kg/mm and above. A three-quarter mill can therefor be instilled at a capital cost per annual ton lower, in most cases, than any other arrangement.这种类型的轧机的特点是采用了一台大功率可逆粗轧机，随后是一台或多台不可逆粗轧机。

这种布置非常灵活，因为它可以对不同钢种和各种厚度坯料（最大250mm）进行轧机。

更重要的是：粗轧能为棒材和具有一定厚度和凸度的精轧做准备，因而精轧机操作简单，产品尺寸准确。

它既能保证高产量，还能轧制各种种类的钢种，他能够承受重量为18kg/mm以上的钢坯，因此：3/4连轧机在大多数情况下要比其他布置形式的吨钢产量投资低。

Unit 12 I Beam and H Beam Steel（工字钢和H型钢）Only a few structural mills have been installed throughout the world during the third quarter of the 20th century. For this reason, these facilities have not seen the rapid development that has characterized other units, such as road mills and hot strip mills. However, there have been some significant innovation closely related to the production of structure being.在20世纪70年代，全世界只有几台型钢轧机投入使用。

由于这个原因，型钢轧机并没有像棒线材轧机和热带轧机一样，得到快速的发展。

然而，在结构梁的生产方面上，型钢轧机还是取得了显著的进步。

Beam blanks with cross-section in the shape of a dog-bone have been continuously cast and blooms for a wide-falnge beam mill have been created by thelongitudinal flame-cutting of continuously cast slabs, thereby bypassing certain stages in primary rolling. More recently, a method has been developed to produce H-shape from continuously cast slabs rather than ingots.具有狗骨形状横截面的H型钢已经实现了连铸和开坯工艺，用于宽翼缘的工字钢轧机，通过纵向火焰切割连铸板坯来进行加工，因此可以省略掉特定个的初轧阶段。

最近，一种通过连铸板坯而非钢锭生产H型钢的方法得到推广。

Since some structural are made of heat-treatable steels, consideration has been given to the development of continuous heat-treating lines for such products. However, at the present time, they are individually quenched and tempered.由于，型钢是通过热处理钢制作而成的，考虑到对该类产品进行连续热处理线的建立（发展）。

然而，在目前，型钢还是单独进行淬火和回火处理。

1.The Evolution Structure Mills 型钢轧机的发展The rolling of tees is believed to have been first accomplished in the period of 1828 to 1830. Zores of France has used small tees in building construction and, in 1847 he designed a tee 4 inches in height, 2.38 inches in width and 0.39 inches thick. Since no rolling mill offered to make this product he fabricated it with plates and angles. However, since this proved to be too weak, another flange was formed by the addition of two more angles. This is believed to be the first I-beam of rolled material used for building purposes.据信：T型钢的轧制最初是在1828到1830内完成的。

1847年，法国的Zores 将小型T型钢应用于建筑结构中，它涉及了一个高4英寸，宽2.38英寸，厚0.39英寸的T型钢。