The continuous casting process includes horizontal continuous casting and curved continuous casting, solid continuous casting and hollow continuous casting. The application of the continuous casting blank simplifies the feeding condition of the extrusion, reduces the processing cost of the extruded bad material, and realizes the "short process" of the extrusion process .
According to foreign data reports, the material utilization rate of the continuous casting tube billet is 10% -20% , and the energy cost is saved by 40% ~ 50% . According to French data, after replacing the forged tube billet with continuous casting tube blank, the metal yield is increased by 17% , the labor force is reduced by 60% , the steel consumption is 1.25 x 10*kJ, the total processing time is reduced by 25% , and the cost is 40~. $ 50 / ton.
In the field of stainless steel production for nearly 40-50 years, due to the development of steelmaking, refining and continuous casting process technology, especially the latest electronic technology and automation control technology in continuous casting process, such as tundish heating technology, crystallizer Electric energy [ non-sinusoidal vibration technology, combined electromagnetic stirring technology of crystallizer and cold section, automatic liquid level control technology of the product and control technology for setting the molten steel liquid field in the tundish (to make the thermodynamic physics and chemical factors of the tundish) The cable reaches the optimal level ) , so that the quality of continuous casting is greatly improved by the factory.
At the same time, because the biggest feature of the extrusion process is to improve the deformability of the processed material itself, it provides extremely favorable conditions for the application of the continuous casting blank in the extruded product. At present, many well-known steel arm factories in foreign countries have generally used continuous casting of bad rice to produce stainless steel seamless steel arms, such as the three extruders of Sandvik, Sweden , with a pressing force of 12. SMN , 17MN and 34 mN , using different types of stainless steel billet production specifications for the > 15mm. in <140mm and s 254mm stainless steel tube, according to information. The company's continuous casting pipe is 50% defective for its own use, and another 50% is supplied to the European market. The maximum specification for continuous casting is 320mm .
In addition, the American Amerexs extruded stainless steel pipe and profile company on the 25MN extruder, the use of stainless steel continuous casting round bad extrusion with d60. 3-152 4mm stainless steel seamless steel pipe and circumscribed round diameter of 19.1-165 Imm stainless steel profile introduced, children using stainless steel slab pressing down children stainless pipe no problem embodiment, the metal surface of the male portion nonuniform flow phenomenon when extruded profiles child points, resulting in trapping and moving type machine village curved section, which is not able to casting a bad or uneven cross-sectional deformation of die set design variation value has closed .
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