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High-manganese steel continuous casting method

A technology of high manganese steel and continuous casting, which is applied in the field of metallurgy, can solve problems such as urgent production demand, and achieve the effect of good internal quality

Active Publication Date: 2019-01-01
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many bloom casting machines in China, the production demand of this kind of steel is urgent, and the technology is rarely reported

Method used

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  • High-manganese steel continuous casting method
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  • High-manganese steel continuous casting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for high manganese steel,

[0017] (1) The molten steel composition of the test steel includes C: 0.24%, Mn: 5.02%, Si: 0.27%, P: 0.0073%, S: 0.0019% and Al: 0.033%, and the production section is 280*380mm Traditional bloom casting machines;

[0018] (2) Baking in the tundish requires a small fire, and the gas flow rate is 90m 3 / h, 5.6 hours, the baking temperature is kept at 1370-1375°C, and the superheat before the machine is 26°C;

[0019] (3) 28 minutes before the start of pouring, the upper nozzle is full-scale blown with argon, and the argon blowing of the cover is closed after the pouring is started and the covering agent is added. The long nozzle is blown with argon and the valve is opened to 60%. Use magnesium coverings;

[0020] (4) Single slag line operation is used in front of the machine, the thickness of the total slag layer is controlled at 35±5mm, the speed is automatically increased, the liquid level fluctuation is controlled within ±2mm, t...

Embodiment 2

[0028] (1) The molten steel composition of the test steel includes C: 0.22%, Mn: 5.21%, Si: 0.26%, P: 0.0071%, S: 0.0018% and Al: 0.034%, and the production section is 280*380mm Traditional bloom casting machines;

[0029] (2) Baking in the tundish requires a small fire, and the gas flow rate is 95m 3 / h, 5.5 hours, the baking temperature is kept at 1361~1367°C, the superheat before the machine is 27°C, and the heat is poured;

[0030] (3) 30 minutes before the start of pouring, the upper nozzle is blown with argon at full scale, and the argon blowing of the cover is closed after the pouring is started and the covering agent is added. The long nozzle is blown with argon and the valve is opened 60%. Nozzle, strengthening protection pouring, tundish covering agent using magnesium covering agent;

[0031] (4) Single slag line operation is used in front of the machine, the total slag layer thickness is controlled at 35±5mm, the speed is automatically increased, the liquid level ...

Embodiment 3

[0038] (1) The molten steel composition of the test steel includes C: 0.24%, Mn: 5.29%, Si: 0.29%, P: 0.0075%, S: 0.0014% and Al: 0.038%, and the production section is 280*380mm Traditional bloom casting machines;

[0039] (2) Baking in the tundish requires a small fire, and the gas flow rate is 100m 3 / h, 5.5 hours, the baking temperature is kept at 1361~1372°C, and the superheat before the machine is 26°C;

[0040] (3) 32 minutes before pouring starts, the upper nozzle is blown with argon at full scale, and the covering argon blowing is closed after the pouring is started and the covering agent is added. Magnesium covering agent is used for middle bag covering agent;

[0041] (4) Single slag line operation is used in front of the machine, the total slag layer thickness is controlled at 35±5mm, the speed is automatically increased, the liquid level fluctuation is controlled within ±2mm, the electromagnetic stirring current of the mold is 510A, the frequency is 1.6Hz, and th...

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Abstract

The invention provides a high manganese-steel continuous casting method. The high manganese steel comprises the following components by weight percentage: 0.21% to 0.25% of C, 4.5% to 5.5% of Mn, 0.2%to 0.3% of Si, 0.2-0.3% of Si, less than 0.008% of P, less than 0.002% of S, 0.015% to 0.04% of Al, and balance of Fe and inevitable impurity elements. The continuous casting method is characterizedin that the second cooling section is divided into two modes for water supply, the first mode adopts a weak cold water line, the specific water quantity is 0.15-0.25 L / kg, and the second mode is thatthe nozzles of the last two sections of a casting machine are closed. The method solves the production of high manganese steel which has a large total alloy amount and strong crack sensitivity duringthe continuous casting of large billet in the conventional process.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a continuous casting method for high manganese steel. Background technique [0002] High manganese steel is widely used in wear-resistant parts, automobiles, mining machinery and offshore platforms in modern society. Because steel generally contains relatively high Mn, it is a difficult steel to produce whether it is alloying or continuous casting. Generally speaking, the production of this type of steel is the process of electric arc furnace + die casting in special steel plants. The smelting of the electric arc furnace solves the alloying problem of Mn, while the die casting avoids the bending and straightening of the continuous casting, and the production risk is reduced. However, for continuous casting, due to the increase of Mn, the heat conduction of molten steel becomes poorer, and the thermal contraction coefficient is larger, resulting in coarse grains of cast slab and greate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06B22D11/111B22D11/16
CPCB22D11/111B22D11/16C22C38/02C22C38/04C22C38/06
Inventor 朱晓雷廖相巍安晓光吴世龙魏元秦海山李叶忠严玲周成王爽
Owner ANGANG STEEL CO LTD
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