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Steel plate with resistance to high-temperature accelerated aging and production method of steel plate

A production method and an aging technology, applied in the field of metallurgy, can solve the problems of aging phenomenon and the increase of the upper yield point, and achieve the effects of improving the aging resistance, reducing the length of the yield platform and reducing the yield strength.

Inactive Publication Date: 2018-12-14
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of accelerated aging such as baking treatment, obvious aging phenomenon will still occur even if it is used within the specified time.

Method used

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  • Steel plate with resistance to high-temperature accelerated aging and production method of steel plate
  • Steel plate with resistance to high-temperature accelerated aging and production method of steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The DX51D+Z hot-dip galvanized sheet produced in this embodiment has a thickness of 0.5mm and a coating weight of 80g / m 2 , the thickness of the coating is 0.4mm, and the color-coated board is produced in a professional home appliance color-coating production line, which is used to manufacture refrigerator door shells. Its chemical composition and mass percentage are: C: 0.022%, Mn: 0.23%, Si: 0.011% , P: 0.011%, S: 0.0063%, Al: 0.040%, Ti: 0.0010%, B: 0.002%, N: 0.0030%, and the balance is iron and unavoidable impurities.

[0021] The production method includes hot rolling and annealing processes, and the specific process steps are as follows:

[0022] (1) Hot rolling: final rolling temperature 920°C, coiling temperature 720°C;

[0023] (2) Annealing: heating section, soaking section temperature 780°C; slow cooling temperature 655°C, equalization section temperature 460°C, soaking section holding time 60 seconds.

[0024] The coating drying process in the production ...

Embodiment 2

[0027] The DX51D+Z hot-dip galvanized sheet produced in this embodiment has a thickness of 0.8mm and a coating weight of 80g / m 2 , the thickness of the coating is 0.4mm, and the color-coated board is produced in a professional home appliance color-coating production line, which is used to manufacture refrigerator door shells. Its chemical composition and mass percentage are: C: 0.024%, Mn: 0.22%, Si: 0.013% , P: 0.010%, S: 0.0053%, Al: 0.040%, Ti: 0.0011%, B: 0.0018%, N: 0.0030%, and the balance is iron and unavoidable impurities.

[0028] The production method includes hot rolling and annealing processes, and the specific process steps are as follows:

[0029] (1) Hot rolling: final rolling temperature 920°C, coiling temperature 715°C;

[0030] (2) Annealing: heating section, soaking section temperature 780°C; slow cooling temperature 650°C, equalization section temperature 460°C, soaking section holding time 55 seconds.

[0031] The coating drying process in the production...

Embodiment 3

[0033] The DX51D+Z hot-dip galvanized sheet produced in this embodiment has a thickness of 1.2mm and a coating weight of 80g / m 2 , coating thickness 0.4mm hot-dip galvanized sheet, color-coated sheet is produced in a professional home appliance color-coating production line, used to manufacture refrigerator door shells, its chemical composition and mass percentage are: C: 0.020%, Mn: 0.24%, Si: 0.019%, P: 0.009%, S: 0.0061%, Al: 0.036%, Ti: 0.0011%, B: 0.0017%, N: 0.0035%, and the balance is iron and unavoidable impurities.

[0034] The production method includes hot rolling and annealing processes, and the specific process steps are as follows:

[0035] (1) Hot rolling: the final rolling temperature is 910°C, and the coiling temperature is 715°C;

[0036] (2) Annealing: heating section, soaking section temperature 780°C; slow cooling temperature 650°C, equalization section temperature 462°C, soaking section holding time 65 seconds.

[0037] The coating drying process in the...

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Abstract

The invention discloses a steel plate with resistance to high-temperature accelerated aging and a production method of the steel plate. The steel plate comprises chemical components in percentage by mass as follows: 0.015%-0.025% of C, 0.20%-0.50% of Mn, 0.010%-0.025% of Si, smaller than or equal to 0.020% of P, smaller than or equal to 0.01% of S, 0.025%-0.055% of Al, 0.0010%-0.003% of Ti, largerthan or equal to 0.0015% of B, smaller than or equal to 0.004% of N and the balance of Fe and inevitable impurities. The production method comprises a hot rolling process and an annealing process. According to the steel plate and the production method, the number of solid-solution interstitial atoms in the steel plate is reduced, dislocation accumulation of the interstitial atoms is reduced, influence of Cottrell atmosphere is reduced, the aging phenomenon is reduced, the scheme can be applied to the steel plate with inconvenience in predegenerative elimination of yield point elongation afteraccelerated aging, and meanwhile, storage time of the material from production to use can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a high-temperature-resistant accelerated aging steel plate and a production method thereof. technical background [0002] With the development of science and technology, the surface treatment technology of cold-rolled and hot-melt sheet products has been widely used. Because the surface of products such as electroplating and color coating has beautiful, smooth and other excellent characteristics, it has become increasingly popular in high-end furniture, home appliances, decorations and portable products. The material of choice for electronics. [0003] For products with simple molding, the material is generally required to have appropriate strength and plasticity. At present, the most widely used steel grade is low-carbon aluminum-killed steel. The thin plate products of these steel types are generally pre-strained when they leave the factory. The materials are us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C21D1/26C21D9/00
CPCC21D1/26C21D9/0081C21D2211/003C21D2211/005C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 杨士宏孙力张鹏梁爱国梁媛媛杨丽芳李建英张军力蔡清俊
Owner HEBEI IRON AND STEEL
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