High-strength hot-dip zinced steel sheet excellent in moldability and suitability for plating, high-strength alloyed hot-dip zinced steel sheet, and processes and apparatus for producing these

一种热浸镀锌钢板、高强度钢板的技术，应用在热浸镀工艺、化学仪器和方法、制造工具等方向，能够解决不能充分确保镀覆密合性、空间不能采用、没有各种性能提高等问题

Active Publication Date: 2008-12-31
NIPPON STEEL CORP
View PDF9 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in JP-A-2001-323355, JP-A-2003-105516, and JP-A-2004-323970, although it is possible to ensure plating adhesion to the extent that it does not peel off in a bending test, it is not sufficient. Securing plating adhesion for strict evaluation such as DuPont impact test
[0015] In addition, in the pre-plating method described in JP-A-56-33463 and JP-A-57-79160, since plating equipment is required, it cannot be adopted if there is no space for it.
In addition, there is a problem that the production cost increases due to the installation of pre-plating equipment
In addition, the secondary annealing described in JP-A-2002-161315 also has the problem of increased production cost.
[0016] In addition, the production technology of the Si-containing steel sheet disclosed before places emphasis on ensuring the platability, and there has been no consideration of the formability and the like when using it as a plated steel sheet. performance improvement

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
  • High-strength hot-dip zinced steel sheet excellent in moldability and suitability for plating, high-strength alloyed hot-dip zinced steel sheet, and processes and apparatus for producing these
  • High-strength hot-dip zinced steel sheet excellent in moldability and suitability for plating, high-strength alloyed hot-dip zinced steel sheet, and processes and apparatus for producing these
  • High-strength hot-dip zinced steel sheet excellent in moldability and suitability for plating, high-strength alloyed hot-dip zinced steel sheet, and processes and apparatus for producing these

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0182] A slab having the composition in Table 1 was heated to 1423K, rolled at a finish rolling temperature of 1183K to 1203K to form a 4.5mm hot-rolled steel strip, and coiled at 853K to 953K. After pickling, cold rolling is carried out, and after being rolled into a 1.6mm cold-rolled steel strip, the continuous hot-dip galvanizing equipment of the annealing method in the production line is used to perform coating under the conditions shown in Table 2 to form an alloyed hot-dip galvanizing equipment. Galvanized steel. As a continuous hot-dip galvanizing facility, after heating in a non-oxidizing furnace, reduction and annealing are performed in a reduction zone. Adjust the combustion air ratio of the non-oxidizing furnace to 1.0 and use it as an oxidation zone. The reduction belt is installed there for making a mixture of CO and H 2 The gas combustion and introduction of H produced 2 O.CO 2 device, the H 2 O and CO 2 introduced to contain 10 vol% H 2 N 2 in the gas. ...

Embodiment 2

[0212] A slab having the composition in Table 1 was heated to 1423K, rolled at a finish rolling temperature of 1183K to 1203K to form a 4.5mm hot-rolled steel strip, and coiled at 853K to 953K. After pickling, cold rolling is carried out, and after being rolled into a 1.6mm cold-rolled steel strip, the continuous hot-dip galvanizing equipment of the annealing method in the production line is used to perform the coating under the conditions shown in Table 3 to form alloyed hot-dip galvanizing equipment. Galvanized steel. As a continuous hot-dip galvanizing facility, after heating in a non-oxidizing furnace, reduction and annealing are performed in a reduction zone. The dew point of the area heated by the non-oxidizing furnace and its residual heat is adjusted to 283K, and it is used as an oxidation zone. The reduction belt is installed there for making a mixture of CO and H 2 The gas combustion and introduction of H produced 2 O.CO 2 device, the H 2 O and CO 2 introduced ...

Embodiment 3

[0241] A slab having the composition shown in Table 1 was heated to 1423K, rolled at a finish rolling temperature of 1183K to 1203K to form a 4.5mm hot-rolled steel strip, and coiled at 853K to 953K. After pickling, cold rolling is carried out, and after being rolled into a 1.6mm cold-rolled steel strip, the continuous hot-dip galvanizing equipment of the annealing method in the production line is used to carry out the coating under the conditions shown in Table 4 to form alloyed hot-dip galvanizing equipment. Galvanized steel. As a continuous hot-dip galvanizing facility, after heating in a non-oxidizing furnace, reduction and annealing are performed in a reduction zone. The dew point of the area heated by the non-oxidizing furnace and its residual heat is adjusted to 283K, and a device for mixing CO and H is installed in the reduction zone. 2 The gas combustion and introduction of H produced 2 O.CO 2 device, the H 2 O and CO 2 introduced containing 10 vol% H 2 N 2 In ...

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
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a high-strength hot-dip zinced steel sheet excellent in moldability and suitability for plating which comprises a high-strength steel sheet containing, in terms of mass%, 0.05-0.25% C, 0.3-2.5% Si, 1.5-2.8% Mn, up to 0.03% P, up to 0.02% S, 0.005-0.5% Al, and up to 0.0060% N, with the remainder being iron and unavoidable impurities and, formed thereon, a zinc deposit layer containing 0.05-10 mass% Al and 0.05-3 mass% Fe, with the remainder being zinc and unavoidable impurities, characterized in that the crystal grain boundaries and crystal grains in the steel sheet which are located in a part ranging from the interface between the high-strength steel sheet and the deposit layer to a depth of 5 [mu]m have an average content of silicon-containing oxides of 0.6-10 mass% and that an Fe-Zn alloy having an average particle diameter of 0.5-3 [mu]m is present in the deposit layer.

Description

technical field [0001] The present invention relates to a high-strength hot-dip galvanized steel sheet and a high-strength alloyed hot-dip galvanized steel sheet and a manufacturing method thereof. , Corrosion resistance, can be suitable for various purposes, such as steel plates for building materials or plated steel plates for steel plates for automobiles. Background technique [0002] A hot-dip galvanized steel sheet is widely used as a coated steel sheet having good corrosion resistance. This kind of hot-dip galvanized steel sheet is usually produced by the following method, that is, after degreasing the steel sheet, preheating it with a non-oxidizing furnace, performing reduction annealing in a reduction furnace for cleaning the surface and ensuring the material, and dipping it in a hot-dip galvanized steel sheet. In the plating solution, the amount of deposition is controlled. It is characterized in that it is excellent in formability, corrosion resistance, plating a...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C21D9/46C22C18/00C22C18/04C22C38/00C22C38/06C23C2/02C23C2/28
CPCC21D9/46C22C18/00C22C18/04C22C38/02C22C38/04C22C38/06C23C2/06C23C2/28B32B15/013C21D8/0263C22C38/001Y10T428/1266Y10T428/12674Y10T428/12799Y10T428/12972C23C2/261C23C2/29C23C2/024C23C2/0222
Inventor 本田和彦西山铁生末宗义广伊藤健郎田中幸基池松阳一
Owner NIPPON STEEL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap