Low-alloy high-strength steel

A low-alloy high-strength, molten steel technology, applied in the field of steel, can solve the problems of poor steel structure uniformity, and achieve the effect of stable structure uniformity, fine grain structure and high purity

Inactive Publication Date: 2007-02-28
WUXI CHICHENG SPECIAL STEEL VENDITION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the high-strength steel produced by various domestic manufacturers has poor uniformity in structure and cannot meet the requirements for manufact...

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0025] A low-alloy high-strength steel, taking:

[0026] C 1.0kg

[0027] Mn 14.5kg

[0028] Si 5.5kg

[0029] S 0.1kg

[0030] P 0.1kg

[0031] S+P 0.2kg

[0032] Mo 1.5kg

[0033] V 0.9kg

[0034] Ni 2.5kg

[0035] Cu 1.0kg

[0036] Al 0.1kg

[0037] O 20ppm

[0038] Fe balance

[0039] Manufacturing process: Take the above-mentioned component materials and adopt electric furnace + vacuum degassing smelting process.

[0040] 1. Melt the iron and steel charge in an electric furnace, start slagging and dephosphorization at 1540°C, use a large amount of slag and flow slag;

[0041] 2. After the slag dephosphorization is completed, carry out slag removal and reduction to create alkaline reduction slag;

[0042] 3. Desulfurization operation, while adjusting the composition of molten steel. After the content of steel composition meets the requirements, the temperature reaches 1630 ° C, and steel tapping begins;

[0043] 4. Enter the refining furnace, carry out slaggi...

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Abstract

The invention relates the low-alloy high-strength steel. The weight percents of the components are as follows: C<=0.12, Mn: 1.25-1.75, Si: 0.45-0.75, S<=0.015, P<=0.015, S+P<=0.025, Mo0: 0.5-0.25, V: 0.06-0.11, Ni<=0.50, Cu<=0.20, Al<=0.015, O<=30ppm, and the left is Fe. The method comprising the following steps: using the above materials, using electric furnace and vacuum degasified to smelt. The low-alloy high-strength steel has high purity and fine grain structure. The material can be used to make air valve of vehicle safe steam pocket.

Description

technical field [0001] The invention belongs to steel products, more precisely, it is a low-alloy high-strength steel. Background technique [0002] At present, the high-strength steel produced by various domestic manufacturers has poor uniformity in structure and cannot meet the requirements for manufacturing high-performance products. For example, the steel for manufacturing automobile airbag valves or valves with special requirements has not yet been produced in China. . Contents of the invention [0003] In view of this, an object of the present invention is to provide a low-alloy high-strength steel with stable structure uniformity. [0004] The purpose of the present invention is achieved through the following technical solutions: a low-alloy high-strength steel consisting of the following components in weight percentage: [0005] C≤0.12 [0006] Mn 1.25-1.75 [0007] Si 0.45-0.75 [0008] S≤0.015 [0009] P≤0.015 [0010] S+P≤0.025 [0011] Mo 00.5-0.25 [...

Claims

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Application Information

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IPC IPC(8): C22C38/12C22C38/16C22C33/04C21C7/064
Inventor 肖瑞勇
Owner WUXI CHICHENG SPECIAL STEEL VENDITION
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