How to use cored wire properly
Most people probably don't know what a cored is, since it's not common in everyday life. It is made of strip steel wrapped in banded alloy powder. It can be divided into different alloy powder: silicon calcium cored wire, silicon manganese calcium cored wire, silicon calcium barium cored wire, barium aluminum cored wire, aluminum calcium cored wire, calcium iron cored wire, pure calcium cored wire and so on. The winding is similar in appearance to the coil, which is different from the core wires used in the textile industry. The ball
We should apply cored wire reasonably in order to achieve good deoxidation efficiency and improve the quality of steel. Of course, after the development in recent years, the type of cored wire is also developing to the direction of diversification. Users can choose and apply different types of cored wire according to different production requirements. So, in order to get good application results when using cored wire, how to use cored wire correctly?
1. Reasonable adjustment of feeding speed
Feeding speed has a great effect on the absorption rate of CA. Too fast or too slow will decrease the absorption rate. When the silicon - calcium - cored wire is fed to a certain depth, it will begin to melt. The depth should ensure that molten and dispersed calcium bubbles are greatly affected. The static pressure of the molten steel causes it to be completely consumed before it floats to the height of the molten steel. Proper feeding rate can increase the recovery rate of calcium. If the speed is too fast, on the one hand, the steel will be violently agitated by the local production of large amounts of calcium vapor, a large amount of calcium vapor directly into the air. Calcium vapour, on the other hand, is too late to dissolve and float in large quantities, reducing its yield. On the contrary, if the speed is too slow, it will result in insufficient feed depth of the cored wire and will not dissolve completely. It floats to the steel level before the steel and is wasted.
2. Correct selection of feeding position
The feeding position of the cored wire also has a great effect on the recovery rate of calcium. The feeding point of solid pure calcium wire should be selected in the center of the downward flow of molten steel, and far away from the bright ring of blowing argon as far as possible, so that Ca can enter the gaseous or liquid state. It descends under the action of downward flow, thus prolonging the residence time of the cored wire in the molten steel and making it fully absorbed by the molten steel.
