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Economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer plate and production method thereof

A technology of comprehensive mechanics and production methods, applied in hot-dip plating process, coating, metal material coating process, etc., can solve the problems of poor comprehensive mechanical properties, achieve qualified cold bending performance, improve plate shape quality and finished product performance , Good economic benefits of the enterprise

Inactive Publication Date: 2021-01-01
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of poor comprehensive mechanical properties of existing hot-dip galvanized automobile outer panel products, the present invention provides an economical hot-dip galvanized automobile outer panel steel with excellent comprehensive mechanical properties, and the hot-dip galvanized automobile outer panel steel has excellent forming properties , excellent comprehensive mechanical properties, good performance stability, high surface quality

Method used

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  • Economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer plate and production method thereof
  • Economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer plate and production method thereof
  • Economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer plate and production method thereof

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Effect test

Embodiment 1

[0086] An economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer panels in this embodiment, the main chemical element composition and mass percentage content are shown in Example 1 of Table 1.

[0087] The production method of a kind of economical excellent comprehensive mechanical properties hot-dip galvanized steel for automobile outer plate of the present embodiment comprises the following steps on the basis of the composition of the chemical elements of the present embodiment:

[0088] S1. Hot metal pretreatment requires front slag removal and rear slag removal, front slag removal bright side ≥ 70%, rear slag removal bright side ≥ 80%, stirring time ≥ 5.0min, hot metal desulfurization target [S] ≤ 0.01%.

[0089] S2. Converter smelting, without adding pig iron and slag steel, using self-circulating scrap steel, the smelting period is 35-50 minutes, no deoxidation of molten steel, argon blowing during tapping, slag blockin...

Embodiment 2

[0105] An economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer panels in this embodiment, the main chemical element composition and mass percentage content are shown in Example 2 of Table 1.

[0106] The production method of a kind of economical excellent comprehensive mechanical properties hot-dip galvanized steel for automobile outer plate of the present embodiment comprises the following steps on the basis of the composition of the chemical elements of the present embodiment:

[0107] S1. Hot metal pretreatment requires front slag removal and rear slag removal, front slag removal bright side ≥ 70%, rear slag removal bright side ≥ 80%, stirring time ≥ 5.0min, hot metal desulfurization target [S] ≤ 0.01%.

[0108] S2. Converter smelting, without adding pig iron and slag steel, using self-circulating scrap steel, the smelting period is 35-50 minutes, no deoxidation of molten steel, argon blowing during tapping, slag blockin...

Embodiment 3

[0123] An economical steel with excellent comprehensive mechanical properties for hot-dip galvanized automobile outer panels in this embodiment, the main chemical element composition and mass percentage content are shown in Example 3 of Table 1.

[0124] The production method of a kind of economical excellent comprehensive mechanical properties hot-dip galvanized steel for automobile outer plate of the present embodiment comprises the following steps on the basis of the composition of the chemical elements of the present embodiment:

[0125] S1. Hot metal pretreatment requires front slag removal and rear slag removal, front slag removal bright side ≥ 70%, rear slag removal bright side ≥ 80%, stirring time ≥ 5.0min, hot metal desulfurization target [S] ≤ 0.01%.

[0126] S2. Converter smelting, without adding pig iron and slag steel, using self-circulating scrap steel, the smelting period is 35-50 minutes, no deoxidation of molten steel, argon blowing during tapping, slag blockin...

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Abstract

The invention discloses economical steel with excellent comprehensive mechanical properties for a hot-dip galvanized automobile outer plate and a production method thereof, and belongs to the technical field of steel for hot-dip galvanized automobiles. The steel for the hot-dip galvanized automobile outer plate comprises the following main chemical elements of, in percentage by mass, 0.001%-0.005%of C, 0.09%-0.15% of Si, 0.40%-0.55% of Mn, 0.05%-0.07% of Ti, 0.02%-0.06% of Als, 0.035%-0.055% of P, less than or equal to 0.015% of S, less than or equal to 0.005% of N, 0.001%-0.006% of Nb, lessthan or equal to 0.0015% of B and the balance Fe and inevitable impurities. The steel for the hot-dip galvanized automobile outer plate has the advantages of being excellent in forming performance, excellent in comprehensive mechanical property, good in performance stability, high in surface quality and low in production cost, industrial large-batch stable production is achieved, and economic benefits of enterprises are good.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanized steel for automobiles, and more specifically relates to an economical hot-dip galvanized steel for automobile outer plates with excellent comprehensive mechanical properties and a production method thereof. Background technique [0002] Safety, energy saving, environmental protection and comfort are the general trends in the development of the automobile manufacturing industry, and countries all over the world have increasingly strict requirements on automobile safety performance and environmental protection. Major automobile companies research and use advanced high-strength steel to achieve high safety performance and lightweight requirements of automobiles. The hot-dip galvanized steel production technology for automobile outer panels is one of the most important technologies in the production field of automobile sheet products for iron and steel enterprises. The outer panel of an au...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/06C22C38/12C22C33/04C21D8/02C23C2/06C23C2/40C23C2/26
CPCC21D8/0226C21D8/0236C21D8/0273C22C33/04C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C23C2/06C23C2/26C23C2/40
Inventor 陈忠崔磊葛浩刘珂刘永刚詹华
Owner MAANSHAN IRON & STEEL CO LTD
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