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Steel for large-capacity electronic gas cylinder and manufacturing method of steel

A technology of steel and electronic gas for gas cylinders, applied in the field of steelmaking in the metallurgical industry

Active Publication Date: 2014-04-30
PANGANG GROUP CHENGDU STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing steel for high-pressure gas cylinders and general smelting methods can no longer meet the quality requirements of this product

Method used

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  • Steel for large-capacity electronic gas cylinder and manufacturing method of steel
  • Steel for large-capacity electronic gas cylinder and manufacturing method of steel
  • Steel for large-capacity electronic gas cylinder and manufacturing method of steel

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] In the EBT-electric furnace with a nominal capacity of 70 tons, 30% molten iron and 70% steel scrap are added, and the foam slag submerged arc process is used in the smelting process to reduce the nitrogen in the air from being dissolved into the steel due to arc ionization. Eccentric bottom slag-free tapping (EBT) is adopted. The chemical composition of molten steel for electric furnace smelting is shown in Table 3, and As≤0.023% and Sn≤0.010% are controlled.

[0066] Tapping is carried out when the above tapping conditions are reached, and the tapping temperature is 1620°C. When the tapping amount is about 1 / 3, start to add deoxidizer CaBaAlSi2.0Kg / t steel, add Al block 1.5Kg / t steel and suitable ferromanganese alloy for alloying. After tapping and before entering LF, feed Al line 3m / t steel.

[0067] When the ladle enters the LF refining station, a submerged arc operation with a large amount of slag is adopted to reduce the contact between the molten steel and the ...

example 2

[0072] In the EBT-electric furnace with a nominal capacity of 70 tons, 45% molten iron and 55% steel scrap are added, and the foam slag submerged arc process is used in the smelting process, which can reduce the nitrogen in the air from being dissolved into the steel due to arc ionization. Eccentric bottom slag-free tapping (EBT) is adopted. The chemical composition of molten steel for electric furnace smelting is shown in Table 3, and As≤0.023% and Sn≤0.010% are controlled.

[0073] Tapping is carried out when the above tapping conditions are reached, and the tapping temperature is 1640°C. When the tapping amount is about 1 / 3, start to add deoxidizer CaBaAlSi3.5Kg / t steel, add Al block 1.2Kg / t steel and suitable ferromanganese alloy for alloying. After tapping and before entering LF, feed Al line 4m / t steel.

[0074] When the ladle enters the LF refining station, a submerged arc operation with a large amount of slag is adopted to reduce the contact between the molten steel ...

example 3

[0079] In the EBT-electric furnace with a nominal capacity of 70 tons, 35% molten iron and 65% steel scrap are added, and the foam slag submerged arc process is used in the smelting process, which can reduce the nitrogen in the air from dissolving into the steel due to arc ionization. Eccentric bottom slag-free tapping (EBT) is adopted. The chemical composition of molten steel for electric furnace smelting is shown in Table 3, and As≤0.023% and Sn≤0.010% are controlled.

[0080] Tapping is carried out when the above-mentioned tapping conditions are reached, and the tapping temperature is 1660° C. When the tapping amount is about 1 / 3, start to add deoxidizer CaBaAlSi2.5Kg / t steel, add Al1.3Kg / t steel and suitable ferromanganese alloy for alloying. After tapping and before entering LF, feed Al line 5m / t steel.

[0081] When the ladle enters the LF refining station, a submerged arc operation with a large amount of slag is adopted to reduce the contact between the molten steel a...

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Abstract

The invention provides steel for a large-capacity electronic gas cylinder and a manufacturing method of the steel. According to the manufacturing method, by optimizing the component design, the steel quality purification and the smelting process control of the steel, the steel for the large-capacity electronic gas cylinder comprises the following chemical components in percentage by weight: 0.40-0.45% of C, 0.25-0.35% of Si, 0.85-1.00% of Mn, less than or equal to 0.013% of P, less than or equal to 0.008% of S, 1.00-1.10% of Cr, 0.20-0.25% of Mo, less than or equal to 0.015% of Ti, less than or equal to 0.18% of Ni, less than or equal to 0.18% of Cu, less than or equal to 0.010% of Sn, less than or equal to 0.025% of As, 0.015-0.040% of Al, less than or equal to 0.0002% of [H], less than or equal to 0.0070% of [N], less than or equal to 0.0020% of T[O], and the balance of iron and inevitable impurities. The steel can meet the requirements of large-capacity high-pressure gas cylinders for packaging electronic gases on application properties such as good strength and toughness.

Description

technical field [0001] The invention relates to the technical field of steelmaking in the metallurgical industry, in particular to an alloy steel for large-capacity high-pressure cylinders of electronic gas and a preparation method thereof. Background technique [0002] Electronic gases are widely used in many fields such as the electronics industry, solar cells, mobile communications, aerospace, military industry, etc., which have a strong development momentum in recent years. Electronics industry——Indispensable raw materials for IC industry production, widely used in thin film, etching, doping, vapor deposition, diffusion and other processes; it is the manufacturing basis of electronic components, known as the "blood" and "food" of the IC industry ". [0003] Electronic gas has dangers such as suffocation, corrosion, toxicity, flammability and explosion. Therefore, its production and application require the use of high-quality gas packaging storage containers to avoid se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C22C33/04C21C7/00
Inventor 马欢鱼贾宁波尹人洁杨文明张涛
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM
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