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Manufacturing method of air bottle steel

A manufacturing method and technology of gas cylinder steel, applied in the direction of temperature control, process efficiency improvement, furnace type, etc., to achieve the effect of good surface quality

Active Publication Date: 2012-01-18
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tensile strength and elongation after fracture of the existing gas cylinder steel cannot meet the requirements of high strength and toughness gas cylinder steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] The specific implementation of the high-strength and toughness gas cylinder steel and its manufacturing method will be described in detail below in conjunction with the examples, but the specific implementation of the present invention is not limited to the following examples.

[0052] Cylinder Steel Example

[0053] The mass percentage ratio of the composition of the embodiment of this gas cylinder steel is:

[0054] C: 0.34% Si: 0.28% Mn: 0.80% Ti: 0.02% Cr: 1.00%

[0055] Mo: 0.45% P: 0.008% S: 0.005% O: 0.0010%

[0056] The rest is Fe and unavoidable impurities.

[0057] Example of manufacturing method

[0058] What this gas cylinder steel manufacturing method embodiment manufactures is the steel grade of above-mentioned gas cylinder steel embodiment, and it is following steps in sequence:

[0059] I EBT electric furnace smelting

[0060] In an EBT electric furnace with a nominal capacity of 60 tons, add 35 tons of pretreated molten iron with P 0.05-0.07%, S 0....

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PUM

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Abstract

The invention relates to an air bottle steel and a manufacturing method thereof. The air bottle steel comprises the following components: less than or equal to 0.015 percent of P, 0.32 to 0.36 percent of C, 0.20 to 0.35 percent of Si, 0.70 to 0.90 percent of Mn, 0.01 to 0.03 percent of Ti, 0.90 to 1.10 percent of Cr, 0.40 to 0.50 percent of Mo, less than or equal to 0.010 percent of S, 0.0020 percent of O and the balance of Fe. The manufacturing method comprises the following steps of: I, smelting and pre-treating molten iron in an EBT electric furnace; II, feeding an Al wire before entering an LF furnace, weakening carbide slag during refining to perform reduction, and fine-adjusting molten steel components according to the component requirement; III, in VD (vacuum degassing), lifting a steel ladle into a vacuum tank to perform vacuum degassing, and feeding an Al wire and an Si-Ca wire; IV, pouring steel ladle to form a steel ingot; V, heating the steel ingot to 1,200 20 DEG C; VI, rolling the heated steel ingot to form a steel blank; VII, cooling the steel blank in heap to room temperature; and VIII, finishing and polishing the steel blank to ensure that the surface of the steel blank has no crack defect. The tensile strength Rm of the air bottle steel manufactured by the method reaches 1,120 to 1,250Mpa, and the elongation A at break reaches 14 to 18 percent.

Description

technical field [0001] The invention relates to a method for manufacturing gas cylinder steel. technical background [0002] The applicant mainly produces steel billets with tensile strength ≥ 980Mpa and elongation ≥ 12% for domestic gas cylinder manufacturers. Now it is necessary to manufacture a high-strength and tough gas cylinder steel with a tensile strength Rm≥1120-1250Mpa and an elongation after fracture A≥14%. The steel billet is exported abroad and the product is finally used internationally. The tensile strength and elongation after fracture of the existing gas cylinder steel cannot meet the requirements of high strength and toughness gas cylinder steel. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the existing gas cylinder steel, the invention provides a method for manufacturing the gas cylinder steel. The tensile strength Rm of the gas cylinder steel produced by the invention reaches 1120-1250Mpa, and the elong...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C21C5/52C21C7/00C21C7/10B22D7/00B21B37/74C21D1/18
CPCY02P10/20
Inventor 孟传峰田义
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD