Low-cost steel-making process for manufacturing flaw detection plate

Abstract

The invention relates to a low-cost steel-making process for manufacturing a flaw detection plate, which belongs to the technical field of steel-making operation processes. The technical scheme adopted by the process is as follows: (1), low-temperature tapping of a converter; (2) furnace slag washing; (3), ingredient high alumina control, ladle furnace (LF) deep deanlphurization, and atmosphere control; (4), fore-and-aft substantially rocking furnace; (5), slightly continuous casting pressing; (6), pouring descending order control; (7), casting blank stacking slow cooling; and (8), ensuring the thickness ratio of a casting blank and a steel plate to be greater than 8:1. The low-cost steel-making process has the advantages and benefits that the process is simple and convenient, saves a technical procedure of vacuum treatment, is a new way for preparing a low-cost flaw detection plate, has a more remarkable effect particularly aiming at products with thickness less than 30 mm, can reach a flaw detection qualified rate over 99 percent, achieves that the flaw detection plate is manufactured by utilizing a short refining process, and lowers manufacturing cost; and in addition, a single refining process route overcomes the defect of large difficulty of double refining manufacturing organization, greatly shortens the periods of the manufacturing organization and preparation, and achieves efficient production, and the process has higher application popularization value.

Description

technical field [0001] The invention relates to a low-cost steelmaking process for producing flaw detection plates, and belongs to the technical field of steelmaking operation processes. Background technique [0002] At present, the steel plate for ultrasonic flaw detection (referred to as the flaw detection plate) has high requirements on its internal quality, and small internal defects will also cause flaw detection failures. The reasons for flaw detection failure mainly involve two aspects: the composition of molten steel and the internal quality of the slab. In order to ensure the qualified rate of flaw detection, the production process of the background technology is controlled from the above two links. In order to minimize the influence of carbon and sulfur segregation and inclusions on the quality of the slab, LF is used to carry out the combination of deep desulfurization and RH degassing and deinclusion. The process can purify the quality of molten steel to the gre...

AI Technical Summary

Problems solved by technology

However, the cost of this process route is relatively high in actual production, and because the duplex process should consider the production coordination between multiple processes, the production organization is more difficult, especially the production performance of small batches of flaw detection plates is more prominent, resulting in a longer production cycle. Long and affect delivery time

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