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Zinc-aluminium based coated steel sheet, manufacturing method thereof, thermoforming method and component

A coated steel sheet and thermoforming technology, applied in the field of coated steel sheet, can solve the problems of liquid phase metal coating eroding steel sheet, affecting the process, easy to evaporate, etc.

Pending Publication Date: 2019-01-01
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to protect the steel plate, the commonly used method is to coat the surface of the steel plate with a layer of protective metal coating. The commonly used ones are galvanized and aluminum-plated, but there are some problems. Galvanizing is prone to corrosion of the steel plate by the liquid metal coating, and Easy to evaporate; aluminum plating will form a layer of hard iron-aluminum compound on the surface of the steel plate, which will affect the subsequent process

Method used

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  • Zinc-aluminium based coated steel sheet, manufacturing method thereof, thermoforming method and component
  • Zinc-aluminium based coated steel sheet, manufacturing method thereof, thermoforming method and component
  • Zinc-aluminium based coated steel sheet, manufacturing method thereof, thermoforming method and component

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Experimental program
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Effect test

Embodiment Construction

[0027] Describe below in conjunction with specific embodiment:

[0028] The embodiment sees attached table 1, 2, 3.

[0029] The strength of the steel plate is greater than 1500MPa, and the elongation is greater than 5%. The coating is completely transformed into an iron alloy layer, without coating evaporation, liquid phase erosion, and hard Fe-Al intermetallic compounds. The structure of the component is martensite + ferrite + retained austenite.

[0030] Attached table 1: the chemical element composition of embodiment coating

[0031]

[0032]

[0033] Attached Table 2: Chemical Composition of Example Steels

[0034]

C

Si

mn

P

S

Al

Ni

Cu

Cr

Mo

B

Nb

Ti

Fe

1

0.11

0.41

1.5

0.010

0.005

2.0

0.35

2.5

0.005

0.03

margin

2

0.17

2.00

6.6

0.030

0.007

0.5

0.3

0.003

margin

3

0.13

0.65

2.1

0.010

...

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Abstract

The invention discloses a zinc-aluminium based coated steel sheet, a manufacturing method thereof, a thermoforming method and a component. After hot press forming, the strength of the steel sheet is greater than 1500 MPa, and the elongation is greater than 5%. A coating is completely transformed into a ferroalloy layer, no evaporation of the coating is generated, no liquid-phase erosion phenomenonis generated, and no hard Fe-Al intermetallic compound is generated. The structure of the component is martensite, ferrite, and retained austenite.

Description

technical field [0001] The invention relates to a coated steel sheet, in particular to a zinc-aluminum-based coated steel sheet, a manufacturing method, a thermoforming method and components thereof. Background technique [0002] For a long time, steel has been the basis of the automobile industry. Although the amount of aluminum alloy, magnesium alloy, plastic and composite materials in automobile manufacturing has been increasing, high-strength steel has high potential for weight reduction, high impact absorption energy, and high fatigue. The advantages of strength, high formability and low planar anisotropy have become the main lightweight materials for the automotive industry. The automobile industry in the 21st century to reduce fuel consumption and reduce CO 2 And exhaust emissions have become the main needs of the society. In order to adapt to this development trend, the steel industry has developed many types of high-strength steel plates such as DP, TRIP, CP, and Q...

Claims

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Application Information

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IPC IPC(8): C22C18/04C22C18/00C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/16C22C38/20C22C38/22C22C38/26C22C38/28C22C38/32C22C38/34C22C38/38C22C38/42C22C38/44C22C38/48C22C38/50C22C38/54C22C38/58C23C2/06C21D8/02
CPCC21D8/0226C21D2211/001C21D2211/005C21D2211/008C22C18/00C22C18/04C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/16C22C38/20C22C38/22C22C38/26C22C38/28C22C38/32C22C38/34C22C38/38C22C38/42C22C38/44C22C38/48C22C38/50C22C38/54C22C38/58C23C2/06
Inventor 吕家舜杨洪刚周芳王永明徐承明李锋刘仁东
Owner ANGANG STEEL CO LTD
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