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Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel

A high-aluminum, austenitic technology, applied in the field of continuous casting of high-manganese, high-aluminum, austenitic low-magnetic steel, can solve the problems of many surface defects, low comprehensive yield, and long process route, etc., and achieve The effect of good quality, avoiding production accidents, and low tissue density

Active Publication Date: 2015-11-04
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]In order to overcome the existing die-casting process conditions, the production of 20Mn23AlV steel has multiple processes, long process routes, low overall yield, low production efficiency and high Mn, high Al steel In the casting process, there are many defects in the surface of the slab, and the tendency of steel breakout is serious. The present invention provides a continuous casting method for high manganese and high aluminum type austenitic low magnetic steel 20Mn23AlV

Method used

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  • Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel
  • Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel
  • Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel

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Embodiment 1

[0032] This embodiment focuses on the description of the continuous casting process, and other processes are operated according to conventional methods.

[0033] 1. The continuous casting method of the high manganese high aluminum type austenitic low magnetic steel provided in this embodiment, the production process route is as follows:

[0034] Hot metal pretreatment—K-OBM-S top-bottom combined blowing converter smelting—LF ladle refining—VD vacuum treatment—continuous casting—slab hot cutting—pile cooling

[0035] 2. Billet specification: 200mm×1260mm×2100±50mm

[0036] 3. See Table 1 for the composition of molten steel in continuous casting

[0037] Table 1 Composition of continuous casting molten steel

[0038]

[0039] 4. The sedation time after upper wishbone is 10 minutes; blow argon gas into the tundish for 5 minutes before the ladle is poured.

[0040] The embodiment of the continuous casting method of this high manganese high aluminum type austenitic low magn...

Embodiment 2

[0054] This embodiment focuses on the description of the continuous casting process, and other processes are operated according to conventional methods.

[0055] 1. The continuous casting method of the high manganese high aluminum type austenitic low magnetic steel provided in this embodiment, the production process route is as follows:

[0056] Hot metal pretreatment—K-OBM-S top-bottom combined blowing converter smelting—LF ladle refining—VD vacuum treatment—continuous casting—slab hot cutting—pile cooling

[0057] 2. Billet specification: 200mm×1260mm×2650±50mm

[0058] 3. See Table 2 for the composition of molten steel in continuous casting

[0059] Table 2 Composition of molten steel for continuous casting

[0060]

[0061] 4. The sedation time after upper wishbone is 10 minutes; blow argon gas into the tundish for 5 minutes before the ladle is poured.

[0062] The embodiment of the continuous casting method of this high manganese high aluminum type austenitic low ...

Embodiment 3

[0076] This embodiment focuses on the description of the continuous casting process, and other processes are operated according to conventional methods.

[0077] 1. The continuous casting method of the high manganese high aluminum type austenitic low magnetic steel provided in this embodiment, the production process route is as follows:

[0078] Hot metal pretreatment—K-OBM-S top-bottom combined blowing converter smelting—LF ladle refining—VD vacuum treatment—continuous casting—slab hot cutting—pile cooling

[0079] 2. Billet specification: 200mm×1260mm×2700±50mm

[0080] 3. The composition of molten steel for continuous casting is shown in Table 3

[0081] Table 3 Composition of molten steel for continuous casting

[0082]

[0083] 4. The sedation time after upper wishbone is 10 minutes; blow argon gas into the tundish for 5 minutes before the ladle is poured.

[0084] The embodiment of the continuous casting method of this high manganese high aluminum type austenitic...

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Abstract

The invention discloses a continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel. The continuous casting method comprises the steps that 1, the low H content of continuous casting molten steel is controlled; 2, a tundish covering agent with a low SiO2 content is adopted; 3, a big-tapered crystallizer and an upward-tilting water opening are adopted, and the water opening of the crystallizer has a small depth; 4, low and constant pulling speed control is adopted; 5, weak cooling of the crystallizer is adopted; 6, special casting powder with low alkalinity, low Al2O3 content and low melting point is adopted; and 7, continuous casting is carried out in a secondary cooling area in an electromagnetic stirring mode. A large number of slag bars are not generated in slag powder liquid in the crystallizer, the continuous casting process is smooth, no alarm about steel leakage occurs, the surface quality of a casting blank is good, and the requirement of subsequent steel rolling can be met.

Description

technical field [0001] The invention relates to a continuous casting method of high manganese and high aluminum type austenitic low magnetic steel, in particular to a continuous casting method of high manganese and high aluminum steel 20Mn23AlV. Background technique [0002] For large transformers above 220kV, during operation, the large current passing through the wires and leads will generate eddy currents in the surrounding structural parts, which will cause local overheating of these structural parts. When the temperature is high, it will affect the safety of the transformer. run. In order to avoid the occurrence of transformer overheating, low magnetic steel plates with extremely low magnetic permeability are used for positions prone to eddy current overheating. [0003] 20Mn23AlV belongs to the C-Mn-Al series austenitic steel. Because the steel does not contain expensive elements such as Cr and Ni and is not easily magnetized in a strong magnetic field, it is an econo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02B22D11/16
Inventor 张宇斌张增武
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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