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...

Examples

Embodiment 1

[0024] The casting speed of the continuous casting machine in this embodiment is 0.75m / min, the length of the slab is 8.0m, and a continuous casting slab is produced every 10.9min. The steel grade of the continuous casting slab is 0Cr18Ni9, and the section specification of the continuous casting slab is 1240×180mm.

[0025] The inner size of the circulating water pool is 9200×2000×1000mm, and the water depth of the pool is 700mm after water storage, and one continuous casting slab can be put in each time. Circulating water flow rate is 1.0~2.0m 3 / min, this embodiment is 1.5m 3 / min. The structure of the pool with circulating water see figure 1 and figure 2 , it is a cement pool 1, the bottom 7 of the cement pool 1 is horizontally provided with steel beams 6 supporting the slab, one side wall 5 has three water inlets 4, and the other side wall has an overflow port 8 and an outlet Shuikou 9.

[0026] (1) During the continuous casting production process, after the continu...

Embodiment 2

[0030] The casting speed of the continuous casting machine in this embodiment is 1.0m / min, and the slab is 11.5m, that is, a continuous casting slab is produced every 11.5min. The steel grade of the continuous casting slab is 00Cr19Ni10, and the section specification of the continuous casting slab is 1240×200mm.

[0031] The structure of the pool of circulating water of the present embodiment sees figure 1 and figure 2 . The size of the cement pool 1 is 12000×3500×1000mm, and the water depth after the pool is stored is 800mm. Two continuous casting slabs can be placed side by side each time. Circulating water flow rate is 1.5~3.5m 3 / min, this embodiment is 2.8m 3 / min.

[0032] (1) During the continuous casting production process, after the continuous casting slab is cut into slabs, the surface temperature before the slabs are hoisted into the cement pool 1 of circulating water is in the range of 600-750°C. The two slabs that have been cut are discharged side by side in...

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...

Examples

Embodiment 1

[0024] The casting speed of the continuous casting machine in this embodiment is 0.75m / min, the length of the slab is 8.0m, and a continuous casting slab is produced every 10.9min. The steel grade of the continuous casting slab is 0Cr18Ni9, and the section specification of the continuous casting slab is 1240×180mm.

[0025] The inner size of the circulating water pool is 9200×2000×1000mm, and the water depth of the pool is 700mm after water storage, and one continuous casting slab can be put in each time. Circulating water flow rate is 1.0~2.0m 3 / min, this embodiment is 1.5m 3 / min. The structure of the pool with circulating water see figure 1 and figure 2 , it is a cement pool 1, the bottom 7 of the cement pool 1 is horizontally provided with steel beams 6 supporting the slab, one side wall 5 has three water inlets 4, and the other side wall has an overflow port 8 and an outlet Shuikou 9.

[0026] (1) During the continuous casting production process, after the continu...

Embodiment 2

[0030] The casting speed of the continuous casting machine in this embodiment is 1.0m / min, and the slab is 11.5m, that is, a continuous casting slab is produced every 11.5min. The steel grade of the continuous casting slab is 00Cr19Ni10, and the section specification of the continuous casting slab is 1240×200mm.

[0031] The structure of the pool of circulating water of the present embodiment sees figure 1 and figure 2 . The size of the cement pool 1 is 12000×3500×1000mm, and the water depth after the pool is stored is 800mm. Two continuous casting slabs can be placed side by side each time. Circulating water flow rate is 1.5~3.5m 3 / min, this embodiment is 2.8m 3 / min.

[0032] (1) During the continuous casting production process, after the continuous casting slab is cut into slabs, the surface temperature before the slabs are hoisted into the cement pool 1 of circulating water is in the range of 600-750°C. The two slabs that have been cut are discharged side by side in...

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