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本文叙述关于热叠轧薄板粘结的研究结果。比较全面和深入的研究说明,薄板粘结与许多因素有关,因此必须较全面地控制轨料、工具和加热情况以及轧制条件,才能较有效地减少粘结。实验结果指出,温度为影响粘结的主要因素之一,粘结随温度升高而增加。粘结随压下率的增加亦有增加。轧制速度适当地提高可以减少粘结。辊面光洁度对粘结亦有一定的影响,经常保持辊面的光洁度可以减少粘结。薄板轨后的冷却速度和方式,对粘结也有很大影响,故板堆不宜过高,且应使之加速冷却。氧化铁皮亦为影响粘结的主要因素之一,毫无氧化铁皮的表面可以在轧制过程中结为牢固的整体。加热和轧制均能改变薄板内磷的分布’而使薄板表面层的磷含量增加,因此少量的磷对减少粘结可以起显著的作用。粘结区的显微结构表现有五种不同的特征,足以说明造成粘结的多种原因。
This article describes the results of studies on hot-rolled sheet bonding. A more comprehensive and in-depth study shows that sheet bonding depends on many factors. Therefore, the rail material, tools and heating conditions as well as the rolling conditions must be controlled more comprehensively so as to reduce the bonding more effectively. The experimental results show that the temperature is one of the main factors that affect the bonding, the bonding increases with the temperature. Adhesion with the increase in the rate of reduction also increased. Appropriate increase in the rolling speed can reduce the bonding. Roller surface finish also have a certain impact on the bond, and often keep the roller surface finish can reduce the bond. The speed and mode of cooling after the sheet rail also have a great influence on the bonding, so the sheet stack should not be too high, and should be accelerated cooling. Iron oxide scale is also one of the main factors affecting the bond, no oxide scale surface can be formed in the solidification of the rolling process. Heating and rolling can change the distribution of phosphorus within the sheet ’and make the sheet surface layer of phosphorus content increased, so a small amount of phosphorus to reduce the bonding can play a significant role. There are five different characteristics of the microstructure of the bonded area, which can be used to illustrate the various causes of the bond.