Technique for refined production of antiacid pipeline steel through VD-LF-VD
A VD-LF-VD, pipeline steel technology, applied in the direction of process efficiency improvement, manufacturing converters, etc., can solve the problem of not being able to meet the design requirements of high-grade pipeline steel anti-HIC and SCC components, so as to reduce production burden and eliminate The adverse effects of carburization and the effect of increasing furnace life
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[0036] Implementation example: A steel plant in the Central Plains of my country applies the process of the present invention to smelt acid-resistant (HIC and SCC) X65 pipeline steel. The specific process: hot metal pre-desulfurization-converter smelting-VD refining (decarburization and deoxidation)-LF refining (heating desulfurization) - VD refining (decarburization and degassing) - slab continuous casting - hot rolling production of acid-resistant X65 pipeline steel with a thickness of 25.2mm, the carbon content of the finished steel is controlled at <0.04%, the sulfur content is less than 0.0009%, and the steel plate is rolled into a tube Finally, it fully meets the requirements of the acid resistance test. See the table below for the quality comparison of the single vacuum (LF-VD) process and the double vacuum (VD-LF-VD) process pipeline steel pipe after sampling.
[0037] Table 1
[0038]
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