Stainless steel alloy wire feed line refining process

Wire feed technology with alloy wire is a kind of furnace refining technology. It is all kind of alloy powder made of low carbon steel alloy core wire and the wire feed machine for a certain speed through the slag layer, the steel shell in the water near the bottom, for deoxidation and desulfurization of the alloy composition, trimming, inclusion modification treatment in liquid steel, so as to improve the internal cleaning volume of molten steel and steel and reduce the cost. As the alloy additives are sent directly to the molten steel, which can overcome some elements of light alloy, low melting point and oxygen in the steel affinity is strong and is not easy to join in the furnace and slag or contact, two losses of oxidation and other unfavorable factors. Thus, in recent years, this technology has been developed rapidly in the metallurgical industry. But in the foundry industry, the application of wire feed technology has just begun.

Liquid steel feed processing can solve some problems that can not be solved by other techniques, and is simple and easy to operate and the cost is low. The steelmaking process is a necessary work in the steelmaking process. As the carbon content of steel is much lower than cast iron, the oxidation tendency of molten steel is much higher than that of cast iron. Even though using the non-oxidation process, such as not performing the operation, it is not possible to obtain qualified molten steel. Therefore, it is a very important work to reduce the oxygen content in the steel by means of the operation. In the foundry industry, there are now more and more manufacturers of casting costs and considerations of production efficiency in the induction furnace cast in molten steel, in the induction furnace slag phase due to low temperature, phase deoxidation and slag refining through the difficult. Therefore, it is usually accomplished using the aluminum insertion method. However, it is difficult to discharge from the steel liquid, and the residual aluminum oxide can affect the properties of the steel because of its shape and distribution. In fact, diffusion deoxidation by ferrosilicon, calcium deoxidizer and oxygen also has high affinity, the deoxidation product is generally complex metal oxide and non-metallic oxide, most of which is easily discharged from floating in liquid steel. But because the proportion of the deoxidizing agent is small and difficult to add to the liquid steel, deoxidation to calcium calcium has a low boiling point and calcium can not play the role of deoxidation and alteration of the inclusion property.

The process of wire feed of molten steel can be a good deoxidizing effect, but it is often difficult to join the deoxidizer, such as calcium by core wire fed into the molten steel, in the absorption of molten steel, reaction. This can greatly improve the absorption rate of calcium, improve the effect of oxygen. In general, the amount of addition of the food treated with the feed line can be reduced and the oxygen is more complete. The role of a variety of types of oxygen species is also more.

The alloying elements can interact with the slag layer in the air and on the steel surface to reduce the amount of alloying elements in the steel. Even if it has crossed the slag layer in the alloy elements of liquid steel, can also be affected by its density, boiling point and other parts of the impact of a very fast liquid steel, can not be effectively absorbed by the steel. Especially for some of the most active or easy metal elements of gasification of the elements is even more. This not only increases the cost but is also easy to appear due to the alloying element absorbing the instability of the alloying element in the actual contents of the actual contents of the fluctuations, thus affecting the performance of the alloy steel. The wire feed process can solve this problem. The alloying element may be delivered directly to the molten steel at the depth of the steel liquid through the feed line processing and the influence of the air and the slag phase can not be completely affected. The alloy elements in the molten steel and the absorption of high-pressure fusion, alloy elements effect have higher contact area and longer time of liquid steel and alloy elements, not only the high absorption rate, absorption and more stable, so as to ensure the steel The content of the alloying element is more accurate. Especially for the micro adjustment of alloying elements, the feed process can be controlled in the closed analysis error range