Method of producing high-yield pattern-free galvanized sheet with yield strength of being 410MP or above

A 410MP, high-yield technology, applied in the field of high-yield pattern-free galvanized sheet, can solve the problems of large size fluctuation, unstable plate shape and performance, and shortened process flow of hot-dip galvanized sheet, and achieve good strength and plastic toughness Matching, good surface quality, shortened process flow

Inactive Publication Date: 2019-02-22
RIZHAO BAOHUA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the advancement of steel rolling technology and the successful commissioning of the ESP production line, it is possible to "replace heat with heat" for hot-rolled products. How to develop stable performance galvanized products, shorten the pr

Method used

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  • Method of producing high-yield pattern-free galvanized sheet with yield strength of being 410MP or above
  • Method of producing high-yield pattern-free galvanized sheet with yield strength of being 410MP or above
  • Method of producing high-yield pattern-free galvanized sheet with yield strength of being 410MP or above

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0040] A method for producing high-yield pattern-free galvanized sheets above 410MP. ESP process produces hot-rolled raw material coils. The composition is designed to be C: 0.20%, Si: 0.30%, Mn: 0.62%, P: ≤0.012%, S: ≤ 0.003%, Ti: 0.023%, Al: ≤0.02%, N: ≤0.033%;

[0041] The method comprises the steps of:

[0042] (1) Carry out converter and LF furnace smelting according to the above composition;

[0043] (2) Continuous casting control: superheat at start-up casting is 25°C, superheat at continuous pouring is 20°C, liquidus temperature is 1519°C, standard deviation of crystallizer liquid level fluctuation: ≤1.0mm; cross-sectional temperature difference of continuous casting slab: 35°C ;

[0044] (3) Rough rolling, R1 inlet temperature 40°C, R3 outlet temperature 955°C;

[0045] (4) Outlet temperature of induction heating furnace: 1130±10°C;

[0046] (5) Final rolling temperature and coiling temperature, final rolling temperature 855°C, coiling temperature 600±15°C;

[00...

Embodiment 2

[0059] A method for producing high-yield pattern-free galvanized sheets above 410MP. ESP process produces hot-rolled raw material coils. The composition is designed to be C: 0.17%, Si: 0.36%, Mn: 0.68%, P: ≤0.012%, S: ≤ 0.003%, Ti: 0.02%, Al: ≤0.02%, N: ≤0.033%;

[0060] The method comprises the steps of:

[0061] (1) Carry out converter and LF furnace smelting according to the above composition;

[0062] (2) Continuous casting control: superheat at start-up casting is 30°C, superheat at continuous pouring is 25°C, liquidus temperature is 1519°C, standard deviation of crystallizer liquid level fluctuation: ≤1.0mm; cross-sectional temperature difference of continuous casting slab: 30°C ;

[0063] (3) Rough rolling, R1 inlet temperature 35°C, R3 outlet temperature 975°C;

[0064] (4) Outlet temperature of induction heating furnace: 1130±10°C;

[0065] (5) Final rolling temperature and coiling temperature, final rolling temperature 840°C, coiling temperature 600±15°C;

[0066]...

Embodiment 3

[0077] A method for producing high-yield pattern-free galvanized sheets above 410MP. ESP process produces hot-rolled raw material coils. The composition is designed to be C: 0.23%, Si: 0.24%, Mn: 0.54%, P: ≤0.012%, S: ≤ 0.003%, Ti: 0.04%, Al: ≤0.02%, N: ≤0.033%;

[0078] The method comprises the steps of:

[0079] (1) Carry out converter and LF furnace smelting according to the above composition;

[0080] (2) Continuous casting control: superheat at start-up casting is 20°C, superheat at continuous casting is 15°C, liquidus temperature is 1519°C, standard deviation of crystallizer liquid level fluctuation: ≤1.0mm; cross-sectional temperature difference of continuous casting slab: 30°C ;

[0081] (3) Rough rolling, R1 inlet temperature 30°C, R3 outlet temperature 985°C;

[0082] (4) Outlet temperature of induction heating furnace: 1130±10°C;

[0083] (5) Final rolling temperature and coiling temperature, final rolling temperature 860°C, coiling temperature 600±15°C;

[008...

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Abstract

The invention discloses a method of producing a high-yield pattern-free galvanized sheet with the yield strength of being 410MP or above. According to the method, on the basis of galvanized raw material components of the ESP (endless strip production) sheet billet full endless rolling technology and the rolling technology design, continuous acid-washing galvanization is conducted, induction furnace heating is conducted, the skin rolling technology is adopted, drawing straightening operation is conducted, and therefore production of the galvanized pattern-free product is achieved, specifically,the specification of the product ranges from 0.8mm to 4.0mm, and the yield strength of the product is larger than 410MPA. The product has the high dimensional accuracy and the good performance stability, the purpose that hot-rolled products partially replace cold-rolled products in the high-yield pattern-free galvanized products is achieved, compared with the cost of cold-rolling galvanization, the cost of hot-rolling galvanization can be reduced by 500-600 yuan per ton, the technological process is shortened, energy is saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of galvanized sheet production, in particular to a method for producing high-yield pattern-free galvanized sheets above 410MP based on an ESP production line and a pickling galvanizing production line. Background technique [0002] The thickness of traditional hot-based galvanized raw materials below 2.0mm is the limit thin specification for hot rolling, and the output is small, so it cannot be mass-produced, the plate shape is not easy to control, and the thickness is uneven; The process is complicated, the cost is high, and the thickness of the cold-based raw material is galvanized above 2.0mm. The process speed is slow, the thickness of the zinc layer is not uniform, and there are many quality defects; Low intensity. [0003] ESP (Endless Strip Production) production line is a new generation of thin slab continuous casting and rolling production line newly built by Arvedi. Because it can produce a whole ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/06C21D8/02C23C2/02C23C2/06C23C2/40
CPCC22C38/02C21D8/0226C22C38/04C22C38/06C22C38/14C23C2/02C23C2/06C23C2/40
Inventor 王野王学伦郑志刚陈统魏代斌
Owner RIZHAO BAOHUA NEW MATERIAL CO LTD
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