Rare-earth-containing 37Mn high-pressure gas bottle blank and production method thereof

A technology of high-pressure gas cylinders and production methods, which is applied in the field of iron and steel metallurgy, and can solve problems such as repeated filling of gas cylinders, high fluidity, poisoning, and concurrent fires

Inactive Publication Date: 2013-05-22
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the gas cylinders are filled with many types of media, and are flammable, explosive, highly toxic or corrosive, and the gas cylinders are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Rare earth is added into ladle molten steel according to 0.005% of molten steel weight. "Blast furnace molten iron - molten iron pretreatment - converter smelting - LF refining - VD vacuum degassing - calcium treatment - adding rare earth - bloom continuous casting - rolling 200mm × 200mm finished billet - sampling - sample heat treatment - inspection" containing rare earth 37Mn high pressure cylinder preform production process.

[0016] The variety and form of adding trace rare earth is feed rare earth composite cored wire.

[0017] The timing of adding trace rare earths to ladle molten steel is after calcium treatment to ensure soft blowing of argon for 5 minutes.

[0018] See Table 1 for the chemical composition (Wt%) of the 37Mn high-pressure gas cylinder blank (200mm×200mm).

[0019] The finished billet of 200mm×200mm is rolled at a heating temperature of 1180±20°C, a rolling start temperature of 1160±20°C, and a final rolling temperature of 920±20°C.

[0020] T...

Embodiment 2

[0029] Mixed rare earths are added into ladle molten steel according to 0.0075% of the weight of molten steel. "Blast furnace molten iron - molten iron pretreatment - converter smelting - LF refining - VD vacuum degassing - calcium treatment - adding rare earth - bloom continuous casting - rolling 200mm × 200mm finished billet - sampling - sample heat treatment - inspection" containing rare earth 37Mn high pressure cylinder preform production process.

[0030] The variety form of adding trace rare earth is silicon aluminum barium calcium rare earth iron alloy.

[0031] The timing of adding trace rare earths to ladle molten steel is to add trace rare earths after calcium treatment to ensure soft blowing of argon for 4 minutes. The chemical composition (Wt%) of 37Mn molten steel is shown in Table 4.

[0032] The finished billet of 200mm×200mm is rolled at a heating temperature of 1180±20°C, a rolling start temperature of 1160±20°C, and a final rolling temperature of 920±20°C. ...

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Abstract

The invention relates to a rare-earth-containing 37Mn high-pressure gas bottle blank and a production method thereof, belonging to the technical field of metallurgy of iron and steel. The production process provided by the invention comprises the following steps: feeding molten iron into a blast furnace, pretreating the molten iron, performing converter smelting, performing LF (ladle furnace) refinement, performing VD (vacuum degasser) vacuum degasification, performing calcium treatment, adding rare earth, performing continuous bloom casting, rolling to obtain a finished blank of 200mm*200mm, sampling, performing heat treatment on the sample, and inspecting. By adopting the technical scheme, the invention has the following advantages in comparison with the traditional technology: the 37Mn high-pressure gas bottle blank is low in gas content of H, O and N, and the steel quality is clean; the cross section of the blank is light in carbon segregation degree and manganese segregation degree; the macroscopic structure is compact, the metallurgical structure is pearlite plus ferrite, the grain fineness is Level 7-9, and the level of inclusion in steel is low; the 37Mn high-pressure gas bottle blank is uniform in composition, structure and performance; the bottle punching process is fine in performance, is suitable for producing a high-pressure gas bottle through punching and is safe to use; the 37Mn high-pressure gas bottle is stable and uniform in performance, high in plasticity and impact property reservation margin and fine in comprehensive mechanical property.

Description

1. Technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a rare earth-containing 37Mn high-pressure gas cylinder blank and a production method thereof. 2. Background technology [0002] High-pressure gas cylinder is a high-pressure container with a nominal working pressure of 10-30MPa. It is a refillable mobile steel cylinder used to hold permanent gas or high-pressure liquefied gas. It is widely used in industrial and mining enterprises, construction, transportation, and transportation. , marine, aviation, medical, military and other sectors of the national economy. Since the gas cylinders are filled with many types of media, and are flammable, explosive, highly toxic or corrosive, and the gas cylinders are refilled and fluid, once an explosion or leakage occurs, it is often accompanied by fire or poisoning, causing disasters Sexual accidents happen. [0003] High-pressure gas cylinders have two stru...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/42B22D11/00C21D1/00
Inventor 程德富井溢农赵宝国桑金波涛雅苗如林
Owner INNER MONGOLIA BAOTOU STEEL UNION
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