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Manufacturing method and device for corrosion-resistant hot stamping parts

A manufacturing method and hot stamping technology, applied in the field of hot stamping, can solve the problems of melting of zinc-zinc-iron coating, inability to obtain anti-corrosion protection at welds, and reducing the strength of hot-formed steel, so as to achieve unaffected corrosion resistance. Effect

Active Publication Date: 2021-12-21
SUZHOU PRESSLER ADVANCED FORMING TECHNOLOGIES CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] However, due to the low melting point of the zinc coating (about 780°C), the steel sheet will undergo evaporation of zinc and melting of the zinc-iron coating during hot forming, which will lead to liquid-induced brittleness and reduce the strength of the hot-formed steel
[0009] In addition, if it is necessary to weld the hot stamping formed parts obtained by the above processing method, it is necessary to remove the zinc or zinc alloy layer of the parts to be welded in advance, and after the welding is completed, the weld seam will not be protected against corrosion

Method used

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Embodiment Construction

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] The invention provides a method and a device for manufacturing a high-strength, corrosion-resistant hot stamping part using a non-coated hot-rolled steel sheet or a cold-rolled steel sheet.

[0042] The manufacturing method of this hot stamping part will be described below:

[0043] Firstly, a bare steel plate without coating (such as 22MnB5 bare steel plate) is blanked into a preformed blank. Specifically, the blanking method may include mold blanking or laser cutting.

[0044] Next, the blank is heated to AC3 or higher to ...

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PUM

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Abstract

The invention discloses a method and device for manufacturing a corrosion-resistant hot stamping part. The manufacturing method includes the following steps: blanking a bare steel plate without a coating layer into a preformed blank; heating the blank to AC3 or higher , austenitizing the blank; transferring the austenitized blank to a mold for hot stamping to obtain a formed member, wherein the shape of the formed member is similar to the part of the final product; removing scale on the surface of the formed member ; Electroplating the formed component after removing the scale, so that the surface of the formed component has a zinc coating or a zinc alloy coating. The hot stamping formed component obtained by the invention has a good corrosion-resistant coating, so that the formed component has excellent corrosion resistance during its service period.

Description

technical field [0001] The invention relates to the field of hot stamping forming, in particular to a method and device for manufacturing a corrosion-resistant hot stamping part. Background technique [0002] For some components with high structural strength requirements (for example, roof beams in automobiles, B-pillar reinforcements, bumpers, door anti-collision beams, etc.), in order to obtain longer service life and service environment adaptability, these Parts should also have good corrosion resistance. [0003] Therefore, parts coated with zinc on the surface have advantages over other structures. For example, parts coated with aluminum-silicon coating do not have electrochemical protection, and their resistance to electrochemical corrosion is poor. [0004] In the prior art, compared with other preparation methods such as forging and cold stamping, there is no doubt that the processing method of hot stamping can obtain parts with higher strength. [0005] Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02C25D3/56C25D3/22C23G1/08B23P15/00
CPCB21D22/022C25D3/565C25D3/22C23G1/08B23P15/00
Inventor 安健陈汉杰王波李浩谭锦虎
Owner SUZHOU PRESSLER ADVANCED FORMING TECHNOLOGIES CO LTD
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