Aluminized steel and preparation method thereof

A technique of aluminizing steel and aluminizing, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of easy pollution of dissolved iron, high concentration of acid solution, final bending performance, toughness and stamping performance Damage and other problems, to reduce the incidence of leakage, accelerate pickling speed, improve the effect of surface quality
CN103320745BInactive Publication Date: 2014-01-08HUBEI PROVINCIAL COMM INVESTMENT FOUR ADVANTAGE STEEL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI PROVINCIAL COMM INVESTMENT FOUR ADVANTAGE STEEL TECH
Publication Date
2014-01-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses aluminized steel comprising a steel workpiece, wherein a eutectic aluminized alloy layer and an aluminum layer are sequentially arranged on the surface layer of the steel workpiece from inside to outside, and the thickness of the aluminized alloy layer is 14-29 microns. A preparation method of the aluminized steel comprises the following steps: co-firing the steel workpiece to remove oil; pickling to remove rust; washing; carrying out surface activating; carrying out auxiliary infiltrating; drying; carrying out rapid induction aluminizing; immediately immersing the dried steel workpiece in molten aluminum heated to 680-700 DEG C in an induction manner, wherein the infiltration time is 2-3 minutes; and the aluminized steel is obtained by the steps. The aluminized steel disclosed by the invention has superior corrosion resistance, heat resistance, wear resistance and photo-thermal reflectivity, and meanwhile, the bending property of the aluminized steel can be improved, the surface brittleness of diffusion aluminized layers is eliminated and the thermal shock resistance and thermal fatigue resistance can be improved. The preparation method disclosed by the invention can be used for effectively controlling the thickness of the aluminized layer, shortening the technique preparation period, improving the efficiency and increasing the yield.
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Description

technical field

[0001] The invention relates to the field of infiltrated steel in metal heat treatment, in particular to aluminized steel, and further includes a preparation method of aluminized steel. Background technique

[0002] Aluminizing is one of the effective measures for steel protection, which can significantly improve the corrosion resistance, heat resistance and overall wear resistance of steel in strong corrosive media and oxidizing media. If the aluminum content in the steel is greater than 8%, dense Al can be formed on the surface of the steel. 2 O 3 The oxide film makes it have excellent corrosion resistance and oxidation resistance. But such high amounts of aluminum would make the steel brittle, difficult to hot and cold work and weld, and unable to withstand shock and vibration loads. The method of coating aluminum on the surface can not only increase the aluminum content of the surface layer of the steel workpiece, but also maintain the good plasticity ...

Claims

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