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Hot-dip galvanized steel for automobile wheel cover and production method thereof

A production method, hot-dip galvanizing technology, applied in hot-dip galvanizing process, coating, metal material coating process, etc., can solve the problems of low forming index elongation and r value, low yield strength and tensile strength, etc. , to achieve the effect of high strength and high elongation

Inactive Publication Date: 2019-01-22
BEIJING SHOUGANG COLD ROLLED SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hot-dip galvanizing of Shougang produces a series of problems such as low yield strength and tensile strength, low elongation rate and r value of the forming index, such as low yield strength and low tensile strength, such as figure 1 Cracked parts shown

Method used

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  • Hot-dip galvanized steel for automobile wheel cover and production method thereof
  • Hot-dip galvanized steel for automobile wheel cover and production method thereof
  • Hot-dip galvanized steel for automobile wheel cover and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0037] Example 1-5: The molten steel is refined by RH, and the continuous casting billet is produced by the conventional continuous casting process. The chemical composition of the molten steel is shown in Table 1. The continuous casting billet is hot-rolled, coiled, conventionally pickled and then cold-rolled. The strip steel is recrystallized and annealed in a vertical continuous annealing furnace. The strip steel at the rapid cooling temperature is hot-dip galvanized and smoothed. See the specific process parameters Table 2. The mechanical properties of the hot-dip galvanized automobile wheel cover steel produced in Examples 1-5 of the present invention are shown in Table 3.

[0038] Table 1. The chemical composition of molten steel in Examples 1-5, Wt%

[0039] Serial number

C，％

Si,%

Mn,%

Ti,%

Alt,%

N，％

Example 1

0.001

0.04

0.07

0.022

0.045

0.002

Example 2

0.002

0.05

0.11

0.041

0.043

0.001

Example 3

0.004

0.03

0.09

0.029

0.051

0.003

Example 4

0.003

0.02

0.12

0.028

0.058

0.002

Example...

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Abstract

The invention discloses a hot-dip galvanized steel for an automobile wheel cover. The hot-dip galvanized steel comprises the raw material chemical composition by the mass percentage: 0.001%-0.004% ofC, not more than 0.05% of Si, 0.07%-0.15% of Mn, 0.01%-0.02% of P, not more than 0.01% of S, 0.04-0.06% of Alt, 0.02-0.05% of Ti, not more than 0.003% of N, and the balance iron and unavoidable impurity elements. A production method of the hot-dip galvanized steel for the automobile wheel cover includes the steps of steelmaking, hot rolling, cold rolling, hot-dip galvanizing and finishing. The hot-dip galvanized steel for the automobile wheel cover is automobile steel having the advantages of high strength, extra deep drawing performance, high elongation percentage and r value and good surface.

Description

Technical field [0001] The invention relates to a hot-dip galvanized steel for automobile wheel covers and a production method thereof, and belongs to the technical field of hot-dip galvanized steel for ultra-deep drawing. Background technique [0002] IF steel (Interstitial free steel) is characterized by low carbon content. After adding Ti and Nb, C and N compounds of Ti and Nb are formed. Because there are no interstitial atoms in the steel, it has superior deep drawing performance. Since it was proposed by Comstock et al. in 1949, due to the limitation of the smelting level at that time, the content of C and N in the steel was high, and more Ti needed to be added, and Ti was expensive, so production was restricted. [0003] Since 1986, the output of IF steel has increased exponentially. In 1994, the output of IF steel in the world exceeded 10 million tons. In 1997, the output of IF steel in Japan alone reached 10 million tons. IF steel has achieved such a significant and rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14C21D8/02C23C2/06C23C2/40
CPCC21D8/0226C21D8/0236C21D8/0242C21D8/0273C21D2211/003C21D2211/005C22C38/004C22C38/02C22C38/04C22C38/06C22C38/14C23C2/06C23C2/40
Inventor 程晓杰李振姚舜齐春雨刘李斌柳智博孔凡庆马兵智孙建华孙存友曾卫仔杨建新任君茹
Owner BEIJING SHOUGANG COLD ROLLED SHEET
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