Method for producing a steel component which is provided with a corrosion-resistant metal coating, and steel component
A technology for anti-corrosion protection and steel components, applied in the direction of metal layered products, metal material coating technology, manufacturing tools, etc., can solve the problems that cannot meet the high requirements of the paint surface
Active Publication Date: 2017-05-31
THYSSENKRUPP STEEL EURO AG +1
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Problems solved by technology
[0005] However, on steel strips of the "galvanized" type, in practice it is common to find visible cracks and holes in the corrosion protection layer of the metal, which are still visible even after the sheet metal has been painted and are therefore not Does not meet high demands on painted surfaces
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[0034] exist image 3 The results of the macroscopic crack evaluation are shown in the Figure 4 The results of the microcrack evaluation shown in are based on small discs N made of zinc-coated annealed sheets with an alloyed Zn-Fe layer (GA) on the one hand and clad on the other hand. The thin sheets with the iron-based alloy (Fe-based) according to the invention are each produced by hot deep drawing.
[0035] The base material of the sheet metal used consists in each case of hardenable steel, for example 22MnB5 steel. The alloyed Zn-Fe layer of the zinc-coated annealed sheet contains about 11 wt. % Fe, about 0.3 wt. base) contains about 51% by weight of Fe, about 22% by weight of Mg and about 27% by weight of Zn.
[0036] The individual panel blanks were heated prior to hot deep drawing, ie to about 880° C., 900° C. or 920° C., and held at the above respective temperatures for a duration of 3 min, 5 min or 10 min. The correspondingly heated sheet metal parts are formed i...
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Abstract
The invention relates to a method for producing a steel component which is provided with a corrosion-resistant metal coating and which exhibits very good mechanical properties, in which an iron-based alloy containing 50-80 wt% Fe, preferably 50-65 wt% Fe, 0-30 wt% Mg, 0-5 wt% Al, 0-5 wt% Ti, 0-10 wt% Si, 0-10 wt% Li, 0-10 wt% Ca, 0-30 wt% Mn, the remainder being Zn and unavoidable impurities, is applied directly to a steel substrate, and in which the steel substrate coated with the iron-based alloy is subjected to hot forming in order to obtain the steel component. By virtue of the method according to the invention, it is possible to achieve a corrosion-resistant metal coating specifically for steel components to be produced by the process of hot forming.
Description
technical field [0001] The invention relates to a method for producing a steel component provided with a metallic anti-corrosion protective coating and having very high mechanical properties, as well as to such a steel component. Background technique [0002] A method known and mentioned for many years for protecting steel substrates against corrosion is the hot-dip coating of sheet metal, in particular strip-shaped sheet steel, in molten baths containing zinc or zinc alloys. The layer thickness of the zinc coating is usually adjusted here by means of a stripping nozzle which is arranged above the molten bath and is aimed at the part of the steel strip which is drawn out of the molten bath substantially perpendicularly. This coating method is also called fire galvanizing. [0003] A variant of hot-galvanized sheet metal that has also been known for many years is the so-called "galvannealed". This modification is produced by heat-treating the steel strip in a furnace after ...
Claims
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IPC IPC(8): C23F13/14C22C38/06C22C38/14C22C38/02C22C38/04C23C30/00
CPCB32B15/011C21D1/673C21D8/0405C21D8/0421C21D8/0447C21D8/0478C21D2251/02C22C38/002C22C38/02C22C38/04C22C38/06C22C38/14C23C14/16C23C14/30C23C14/562C23C14/5806C25D5/10C25D5/36C25D5/623C21D1/18C23C14/02C25D3/562C25D5/50
Inventor 贝恩德·舒马赫尔克里斯蒂安·施韦尔特阿克塞尔·施罗滕拉尔夫·鲍谢
Owner THYSSENKRUPP STEEL EURO AG