Protective slag: stainless steel continuous casting protective slag
Release time:
2020-07-16
Stainless steel is one of the most important and popular metallic materials. Due to its excellent properties such as corrosion resistance, wear resistance, heat resistance, low temperature resistance, high strength, and easy processing, it is widely used in various aspects of industrial and civil fields. In many stainless steels, the proportion of austenitic stainless steel is less than that of stainless steel, and stainless steel is a typical austenitic stainless steel. However, due to the peritectic reaction in the crystallizer, defects such as pitting, cracks, subsurface slag inclusion, and deep oscillation marks appear in the continuously cast billet. Severe rough surface is often accompanied by cracks, which seriously affects the quality of the slab and reduces the slab yield. In order to meet the performance requirements, the surface quality requirements of stainless steel are stricter than those of ordinary carbon steel, but it is easy to produce surface defects. Therefore, it is very necessary to select a suitable protective slag for continuous casting of stainless steel and strictly control its physicochemical properties.
Design Principles of Stainless Steel Continuous Casting Protective Slag
The continuous casting process of stainless steel is more complex than that of ordinary carbon steel, and the requirements for process parameters such as casting temperature, casting speed, and cooling system are stricter. The slag making process and the physicochemical properties of the protective slag must be strictly required and controlled to adapt to the continuous casting process of stainless steel. Due to the high-temperature characteristics of stainless steel and the requirements of the related continuous casting process, the physicochemical properties of the protective slag, such as alkalinity, melting temperature, and viscosity, should be strictly controlled.
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