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High-strength low-alloy steel HX420 LAD+Z heat-based spangle-free zinc-plated plate

A low-alloy steel, high-strength technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of large performance and dimensional deviation, coating bonding force inspection, etc., to achieve stable performance and dimensional deviation , good surface quality, considerable social and economic benefits

Inactive Publication Date: 2019-05-17
RIZHAO STEEL HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing high-strength low-alloy steel products have large performance and size deviations, and the bonding strength of the coating is poor, which cannot meet the needs of the market.

Method used

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  • High-strength low-alloy steel HX420 LAD+Z heat-based spangle-free zinc-plated plate
  • High-strength low-alloy steel HX420 LAD+Z heat-based spangle-free zinc-plated plate
  • High-strength low-alloy steel HX420 LAD+Z heat-based spangle-free zinc-plated plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet, including the following raw materials in mass percentages, C: 0.040-0.050%, Si: 0.15-0.20%, Mn: 1.1-1.20%, P: ≤0.012%, S: ≤0.003, Nb: 0.020-0.030, Ti: 0.010-0.015%, O: ≤0.004%, N: ≤0.0045%, the rest are iron and unavoidable impurities;

[0019] The method of high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet, the preparation steps are as follows: the galvanized raw material is pickled, leveled, heated, galvanized, skin-finished, and passivated using the PGL pickling and galvanizing continuous production line , coiled into hot-dip galvanized coils;

[0020] Preferably, the pickling process requirements of the PGL acid plating continuous production line: the HCL content in the acid tank is 60g / L, the total acid plating is 180-215g / L, and the pickling temperature is 82°C;

[0021] Preferably, the rinsing process requirements of the PGL acid plating continuou...

Embodiment 2

[0032] A high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet, including the following raw materials in mass percentages, C: 0.040-0.050%, Si: 0.15-0.20%, Mn: 1.1-1.20%, P: ≤0.012%, S: ≤0.003, Nb: 0.020-0.030, Ti: 0.010-0.015%, O: ≤0.004%, N: ≤0.0045%, the rest are iron and unavoidable impurities;

[0033] A production method of high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet. The preparation steps are as follows: the galvanized raw material is pickled, leveled, heated, galvanized, and skin-finished using a PGL pickling and galvanizing continuous production line. , passivation, and coiled into hot-dip galvanized coils;

[0034] Preferably, the pickling process requirements of the PGL acid plating continuous production line: the HCL content in the acid tank is 65g / L, the total acid plating is 180-215g / L, and the pickling temperature is 85°C;

[0035] Preferably, the rinsing process requirements of the PGL acid plat...

Embodiment 3

[0045] A high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet, including the following raw materials in mass percentages, C: 0.040-0.050%, Si: 0.15-0.20%, Mn: 1.1-1.20%, P: ≤0.012%, S: ≤0.003, Nb: 0.020-0.030, Ti: 0.010-0.015%, O: ≤0.004%, N: ≤0.0045%, the rest are iron and unavoidable impurities;

[0046] A production method of high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet. The preparation steps are as follows: the galvanized raw material is pickled, leveled, heated, galvanized, and skin-finished using a PGL pickling and galvanizing continuous production line. , passivation, and coiled into hot-dip galvanized coils;

[0047] Preferably, the pickling process requirements of the PGL acid plating continuous production line: the HCL content in the acid tank is 70g / L, the total acid plating is 180-215g / L, and the pickling temperature is 85°C;

[0048]Preferably, the rinsing process requirements of the PGL acid plati...

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Abstract

The invention belongs to the technical field of steel and iron, and relates to a method for producing a high-strength low-alloy steel HX420 LAD+Z heat-based spangle-free zinc-plated plate. The zinc-plated plate comprises the following raw materials of, by mass, 0.040-0.050% of C, 0.15-0.20% of Si, 1.1-1.20% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.020-0.030% of Nb, 0.010-0.015% of Ti, less than or equal to 0.004% of O, less than or equal to 0.0045% of N and the balance iron and inevitable impurities.

Description

technical field [0001] The invention belongs to the technical field of iron and steel, and relates to a method for producing a high-strength low-alloy steel HX420LAD+Z heat-based spangle-free galvanized sheet. Background technique [0002] High-strength low-alloy galvanized steel sheet, as the steel sheet with the largest amount of automobile body, has good comprehensive properties such as high strength, good toughness, and excellent welding performance, which perfectly meets the requirements of automobiles for weight reduction, safety, energy saving, environmental protection, and corrosion resistance. At the same time, it is applied in the fields of pipelines, drilling equipment, bridges, shipbuilding, general offshore equipment, construction, containers and pressure vessels, and has a broad market space. [0003] However, the existing high-strength low-alloy steel products have large performance and size deviations, and the bonding strength of the coating is poor, which ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14B21C37/02C23C2/06C23C2/40
Inventor 魏代斌鲍振振郑万任郑志刚汲广桥李斌郎天祥晏武杨晓李光跃
Owner RIZHAO STEEL HLDG GROUP
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