Method of processing chromium-nickel austenite stainless steel continuous casting slab

Abstract

The invention relates to a method of processing chromium-nickel austenite stainless steel continuous casting billet, comprising the following steps in sequence: (1) placing cut chromium-nickel austenite stainless steel continuous casting slab into a circulating water tank and removing the slag crusts adhered to the surface of the chromium-nickel austenite stainless steel continuous casting slab; (2) lifting the chromium-nickel austenite stainless steel continuous casting slab out of the circulating water tank and cooling the same; and (3) visually detecting the chromium-nickel austenite stainless steel continuous casting slab to decide whether the chromium-nickel austenite stainless steel continuous casting slab needs to be polished. If having smaller and less oscillation marks on the surface, the chromium-nickel austenite stainless steel continuous casting slab does not need to be polished; if having obvious oscillation marks on the surface, the defected chromium-nickel austenite stainless steel continuous casting slab needs to be artificially polished; and if having deep oscillation marks, scabs on the surface or the like on the surface, the defected chromium-nickel austenite stainless steel continuous casting slab needs to be integrally polished with a polishing machine until the oscillation marks, the scabs or the like on the surface can not be seen visually. The method of processing chromium-nickel austenite stainless steel continuous casting billet uses water to remove all the protective slag crusts adhered to the surface of the chromium-nickel austenite stainless steel continuous casting slab, thus the visual detection of chromium-nickel austenite stainless steel continuous casting slab can be detected, the polishing workload can be greatly reduced, the yield can be increased and the processing efficiency can be improved.

Description

technical field [0001] The invention relates to a method for processing chromium-nickel austenitic stainless steel continuous casting slabs. Background technique [0002] In many applications of stainless steel, there are high requirements for the surface quality of the product, not only because of the need for corrosion resistance, but also because of the requirement for the surface finish and aesthetics of the product. The surface quality of stainless steel continuous casting slabs has a great influence on the surface quality of its final products, especially cold-rolled products. [0003] When ordinary carbon steel and low-alloy steel continuous casting slabs are heated in the heating furnace of the hot rolling process, a thick layer (several millimeters) will be uniformly oxidized on the surface of the slab, and then this layer of iron will be oxidized by high-pressure water spraying. Phosphorus removal. Its effect is equivalent to peeling off a surface layer with a th...

AI Technical Summary

Problems solved by technology

First, the temperature of the continuous casting slab just pulled out is very high (generally, the surface temperature is above 600°C), and inspectors cannot approach it, and the continuous casting slab needs to be left to cool for a period of time, and the temperature of the continuous casting slab is lowered (generally below 200°C) The inspection can only be carried out after the inspection, that is to say, it will occupy a large storage space for the slab, and also prolong the processing cycle of the slab

Second, because there is a layer of mold slag on the surface of the casting slab, it is difficult to accurately detect small surface defects. Generally, the surface of the continuous casting slab needs to be ground evenly for a layer before continuing to visual inspection, which greatly increases the workload. Increase

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