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

Low-carbon aluminum-killed steel hot-dip galvanized sheet and production method thereof

A low-carbon aluminum-killed steel and hot-dip galvanized sheet technology, which is applied in the field of steel materials, can solve problems such as processing strain marks, and achieve the effects of promoting the precipitation of solid solution carbon, avoiding processing strain marks, and excellent aging performance

Active Publication Date: 2015-10-28
SHOUGANG CORPORATION
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly because when conventional hot-dip galvanizing units produce DX51D+Z aluminum-killed steel hot-dip galvanized sheets, the basic hot-dip galvanizing process is heating-soaking-slow cooling-rapid cooling-galvanizing-air cooling-finishing- Tension straightening - post-treatment, because more solid solution carbon in the crystal lattice after soaking is solid-dissolved after rapid cooling, so that the steel plate is prone to processing strain marks caused by aging in subsequent processing

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
  • Low-carbon aluminum-killed steel hot-dip galvanized sheet and production method thereof
  • Low-carbon aluminum-killed steel hot-dip galvanized sheet and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In terms of weight percentage, the chemical composition is: C: 0.02%, Si: 0.01%, Mn: 0.21%, P: 0.014%, S: 0.014%, N: 0.003%, Al: 0.044%, and the rest are Fe and impurities The steel is smelted and cast to obtain cast slabs, and the chemical composition of the steel is shown in Table 1; then the slabs are hot-rolled, pickled and cold-rolled to obtain cold-rolled finished coils; then the cold-rolled finished coils are hot-dip galvanized, In the annealing process, heating is carried out sequentially, soaking at 711°C, slow cooling at 670°C, rapid cooling at 390°C, the cooling rate is 48°C / s, overaging at 395°C, the overaging time is 320s, and reheating at 460°C , galvanized, air-cooled to obtain a hot-dip galvanized sheet; finally, the hot-dip galvanized sheet is skinned with a pass elongation of 1.3%, stretched and straightened, and post-processed to finally obtain a low-carbon aluminum-killed steel hot-dip with a thickness of 0.7mm Zinc sheet, the chemical composition of...

Embodiment 2-6

[0031] Embodiment 2-6 is identical with embodiment 1 on the production process, and difference is: the percentage by weight of the chemical composition of steel in embodiment 2-6 is slightly different from embodiment 1, and in embodiment 2-6 The chemical composition of the steel is shown in Table 1; the soaking temperature, slow cooling temperature, rapid cooling temperature, rapid cooling rate, overaging temperature, overaging time, reheating temperature, skin elongation of Examples 2-6 in the production process , finished product thickness and other technical parameters are also slightly different from Example 1; the aging performance of the low-carbon aluminum-killed steel hot-dip galvanized sheet produced by Embodiment 2-6 is basically the same as that of Example 1, and all have higher aging performance . See Table 2 for the relevant technical parameters and the aging performance of the final product in Examples 2-6.

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
elongationaaaaaaaaaa
Login to View More

Abstract

The invention provides a low-carbon-aluminum killed steel hot-galvanized plate which consists of the following chemical components in percentage by mass: 0.01-0.07 percent of C, 0.01-0.20 percent of Si, 0.05-0.40 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.005 percent of N, 0.02-0.07 percent of Al and the balance of Fe and unavoidable impurities. The invention provides a production method for the low-carbon-aluminum killed steel hot-galvanized plate. The production method comprises the steps of smelting and casting; hot-rolling, pickling and cold-rolling; hot galvanizing through heating, soaking, slow cooling, quick cooling, overaging, reheating, galvanization and air cooling according to an annealing technology; finishing, straightening and post-treatment. During hot galvanizing of the low-carbon-aluminum killed steel hot-galvanized plate disclosed by the invention, a hot galvanizing annealing technology with an aging working procedure is combined, and a high finishing elongation rate is adopted, so that the produced low-carbon-aluminum killed steel hot-galvanized plate is high in aging performance.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and in particular relates to a low-carbon aluminum-killed steel hot-dip galvanized sheet and a production method thereof. Background technique [0002] Low-carbon aluminum-killed steel hot-dip galvanized sheets (such as DX51D+Z) are usually produced by conventional hot-dip galvanizing units, and are mostly used in automobiles, home appliances and construction industries. According to EN10346-2009 standard, the aging performance of DX51D+Z aluminum-killed steel hot-dip galvanized sheet is not guaranteed, and users should use it as soon as possible to avoid processing strain marks. This is mainly because when conventional hot-dip galvanizing units produce DX51D+Z aluminum-killed steel hot-dip galvanized sheets, the basic hot-dip galvanizing process is heating-soaking-slow cooling-rapid cooling-galvanizing-air cooling-finishing- Tension straightening - post-treatment, because more ...

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 Patents(China)
IPC IPC(8): C22C38/06C23C2/06C23C2/40C21D9/46C23C2/28
Inventor 梁轩刘再旺崔阳徐海卫李永林杜雁冰阳代军高圣勇高小丽黄来情庞在刚唐德池李亚东
Owner SHOUGANG CORPORATION