Method for producing a steel component having a metal coating protecting it against corrosion, and steel component

A technology for anti-corrosion protection and steel components, applied in metal layered products, metal material coating processes, manufacturing tools, etc., can solve problems such as cost, reduce hydrogen absorption, and improve performance.

Active Publication Date: 2016-04-27
THYSSENKRUPP STEEL EURO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Energy losses associated with dew point control lead to additional costs during component manufacturing

Method used

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  • Method for producing a steel component having a metal coating protecting it against corrosion, and steel component
  • Method for producing a steel component having a metal coating protecting it against corrosion, and steel component
  • Method for producing a steel component having a metal coating protecting it against corrosion, and steel component

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0051] The cold-rolled strip after annealing is subjected to alkaline injection degreasing and electrolyte degreasing, the cold-rolled strip is made of steel containing 0.3-3% by weight of manganese, the steel has a yield limit of 150-1100MPa and a yield limit of 300- 1200MPa tensile strength. The degreasing basin contains a concentration of about 15g / L of a commercially available cleaner with greater than 25% sodium hydroxide, 1-5% fatty alcohol ether and 5-10% ethoxylated, acrylic acid Oxylated and methylated C12-18 alcohols. The cell temperature was approximately 65°C. The duration of jet degreasing is about 5 s. Followed by scrubbing. In the following process, the strip is hot-dipped (fire-coated). The metal melt is formed from an aluminum-zinc alloy comprising: 35-70% by weight of aluminum, 35-60% by weight of zinc, 0.1-10% by weight of magnesium, 0.1 to not more than 10% by weight of Si and Not higher than 5% by weight of Fe. In addition, the aluminum-zinc alloy pr...

example 2

[0053] Hot-rolled strip (pickling) of steel grade 22MnB5 (1.5528) is degreased by alkaline injection and electrolyte. The strip is additionally brushed during alkaline jet degreasing. The degreasing basin contains a commercially available detergent having 5-10% sodium hydroxide and 10-20% potassium hydroxide at a concentration of approximately 20 g / L. The cell temperature was approximately 75°C. In the following process, the strip is hot-dipped (fire-coated). The metal melt is formed from an aluminum-zinc alloy containing: 35-70% by weight of aluminum, 35-60% by weight of zinc, 0.1-10% by weight of magnesium, 0.1 to 10% by weight of Si and not more than 5% by weight Fe. In addition, the aluminum-zinc alloy preferably also contains manganese and / or nickel in a total content of up to 15% by weight, wherein the manganese content can be up to 0.02% by weight. The overall layer thickness of the metal layer is adjusted by means of a grinding device (eg compressed air nozzle or i...

example 3

[0055] Similar to example 1 or 2, but with the difference that a so-called master alloy process is carried out after coating and before forming (press hardening). For this purpose, the flat steel product or slab is heated to a temperature in the range between 300° C. and 650° C., preferably between 350° C. and 600° C., so that iron enrichment occurs in the corrosion protection layer by diffusion processes.

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Abstract

The invention relates to a method which allows production of a steel component that has a well-adhering metal coating protecting it against corrosion. For this purpose, a flat steel product produced from a steel material which has a yield point of 150 - 1100 MPa and a tensile strength of 300 - 1200 MPa is coated with an anti-corrosion coating that is produced from an alloy which contains 35 - 70 wt.-% aluminum, 35 - 60 wt.-% zinc, 0.1 - 10 wt.-% magnesium, up to 10 wt.-% Si and up to 5 wt.-% Fe. A billet is obtained from the flat steel product, is directly heated to at least 800 DEG C and is then molded into the steel component or is first molded into the steel component and then heated to at least 800 DEG C. The steel component obtained is subsequently heat-treated by cooling it sufficiently quickly from a sufficiently high temperature.

Description

technical field [0001] The invention relates to a method for producing a steel component provided with a metallic corrosion protection layer by forming a flat steel product made of manganese steel, which was provided with an aluminum-zinc alloy layer prior to the forming of the steel component. Background technique [0002] When "flat steel products" are mentioned here, this means steel strips, steel sheets or slabs derived therefrom or the like. [0003] In order to provide the combination of low weight, maximum strength and protection required in modern body construction, thermoformed components from high-strength steels are currently used in areas of these bodies which may be exposed to particularly high loads in the event of a crash. [0004] In the process of hot press hardening (also known as hot forming), steel slabs obtained by splitting cold-rolled or hot-rolled strip are heated to a forming temperature usually above the austenitizing temperature of the various stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/00C22C21/00
CPCC22C18/00C22C18/04C22C21/00C22C21/10C23C2/06C23C2/12C23C2/26C23C2/28B32B15/012B32B15/013C22C30/06C22C38/002C22C38/14C22C38/18Y10T428/263Y10T428/24967Y10T428/12951Y10T428/265Y10T428/264Y10T428/12944Y10T428/12757Y10T428/24975Y10T428/12799Y10T428/12937Y10T428/12979Y10T428/12958Y10T428/12972C21D1/18C21D6/002C21D6/005C21D6/008C21D8/005C21D9/0068C22C38/02C22C38/04C22C38/06C23C2/29C23C28/021C23C30/005B32B15/043C23C28/321C23C28/025C23C28/02B32B15/04C23C30/00B32B15/18B32B15/20C22C38/28C22C38/32C22C38/38C23C2/40
Inventor 马里亚·科耶尔萨沙·西科拉曼努埃拉·鲁滕贝里扬科·巴尼克珍妮弗·舒尔茨
Owner THYSSENKRUPP STEEL EURO AG
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