Unlock instant, AI-driven research and patent intelligence for your innovation.

Zinc alloy plated steel sheet having excellent bending workability and manufacturing method therefor

a technology excellent bending workability, which is applied in the field can solve the problems of lowering the bending workability of poor bending workability of zn—al—mg-based zinc alloy plated steel sheet, and increasing air pollution and corrosive environments, so as to achieve high bending workability, high surface quality, and high corrosion resistance

Inactive Publication Date: 2018-11-08
POHANG IRON & STEEL CO LTD
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a zinc alloy plated steel sheet that has high bending workability, corrosion resistance, and surface quality, as well as high scratch resistance.

Problems solved by technology

However, air pollution and corrosive environments have increased with industrial advances, and regulations on resource and energy savings have been tightened.
However, such a Zn—Al—Mg-based zinc alloy plated steel sheet has poor bending workability.
That is, the zinc alloy plated steel sheet includes large amounts of Zn—Al—Mg-based intermetallic compounds in a plating layer thereof as a result of thermodynamic reaction between zinc (Zn), aluminum (Al), and magnesium (Mg), and such intermetallic compounds may cause cracks in the plating layer during a bending process because of high hardness of the intermetallic compounds, thereby lowering the bending workability of the zinc alloy plated steel sheet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zinc alloy plated steel sheet having excellent bending workability and manufacturing method therefor
  • Zinc alloy plated steel sheet having excellent bending workability and manufacturing method therefor
  • Zinc alloy plated steel sheet having excellent bending workability and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046]Low carbon cold-rolled steel sheets each having a thickness of 0.8 mm, a width of 100 mm, and a length of 200 mm were prepared as base steel sheets for plating test samples, and then foreign substances such as rolling oil were removed from the surfaces of the base steel sheets by dipping the base steel sheets into acetone and washing the base steel sheets with ultrasonic waves. Thereafter, a 750° C. reducing atmosphere heat treatment commonly performed to guarantee mechanical characteristics of steel sheets in the hot-dipping plating field was performed on the base steel sheets, and then the base steel sheets were dipped into plating baths (bath temperature: 460° C.) having compositions shown in Table 1 below to fabricate zinc alloy plated steel sheets. Thereafter, each of the zinc alloy plated steel sheets was wiped with gas to adjust a plating weight to be 70 g / m2 on each side. Then, the zinc alloy plated steel sheets were cooled under the conditions shown in Table 1 below a...

example 2

[0058]Low carbon cold-rolled steel sheets each having a thickness of 0.8 mm, a width of 100 mm, and a length of 200 mm were prepared as base steel sheets for plating test samples, and then foreign substances such as rolling oil were removed from the surfaces of the base steel sheets by dipping the base steel sheets into acetone and washing the base steel sheets with ultrasonic waves. Thereafter, a 750° C. reducing atmosphere heat treatment commonly performed to guarantee mechanical characteristics of steel sheets in the hot-dipping plating field was performed on the base steel sheets, and then the base steel sheets were dipped into plating baths having compositions shown in Table 3 below to fabricate zinc alloy plated steel sheets. Thereafter, each of the zinc alloy plated steel sheets was wiped with gas to adjust a plating weight to be 70 g / m2 on each side. Then, the zinc alloy plated steel sheets were cooled under the same conditions as Inventive Sample 1 of Example 1.

[0059]Therea...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Login to View More

Abstract

Provided are a zinc alloy plated steel sheet and a method for manufacturing the zinc alloy plated steel sheet. The zinc alloy plated steel sheet includes a base steel sheet and a zinc alloy plating layer, wherein the zinc alloy plating layer includes a Zn single phase structure as a microstructure and a Zn—Al—Mg-based intermetallic compound, and the Zn single phase structure has a degree (f) of (0001) preferred orientation expressed by Formula 1 below within a range of 50% or greater. [Formula 1] f(%)=(Ibasal / Itotal)×100 where Itotal refers to the integral of all diffraction peaks of the Zn single phase structure when an X-ray diffraction pattern is measured within a range of 2 theta from 10° to 100° using a Cu-Kα source, and Ibasal refers to the integral of diffraction peaks of the Zn single phase relating to a basal plane.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a zinc alloy plated steel sheet having high bending workability and a method for manufacturing the zinc alloy plated steel sheet.BACKGROUND ART[0002]A zinc plating method for suppressing the corrosion of iron by cathodic protection has high anti-corrosion efficiency and economic feasibility, and thus has been widely used in manufacturing steel materials having high corrosion resistance. Particularly, hot-dip zinc plated steel sheets, manufactured by dipping a steel material into molten zinc to form a plating layer, are obtainable through simple manufacturing processes and are relatively inexpensive, as compared to electro-zinc plated steel sheets, and thus, demand therefor has increased in a wide range of industries, such as the automotive industry, the home appliance industry, and the construction industry.[0003]When a hot-dip zinc plated steel sheet is exposed to a corrosive environment, zinc having a lower oxidation-reduction...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C2/06C23C2/40C23C2/26C23C2/20
CPCC23C2/06C23C2/40C23C2/26C23C2/20C22C18/04C23C2/14C23C2/16C23C2/18C23C2/261Y10T428/12799
Inventor OH, MIN-SUKKIM, SANG-HEONKIM, TAE-CHULKIM, JONG-SANGYUN, HYUN-CHUYOO, BONG-HWAN
Owner POHANG IRON & STEEL CO LTD