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Casting welding die and oxidation passivation method thereof

A casting and welding mold and mold technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of difficult separation of lead parts of casting and welding molds, easy to form adhesion, lack of effect, etc. Die effect

Inactive Publication Date: 2012-10-17
ZHAOQING LEOCH BATTERY TECH
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Problems solved by technology

[0003] Taking the production of batteries as an example, the iron and steel materials used for battery lead casting and welding molds are in contact with liquid lead alloys. After cooling, it is easy to form adhesions, and it is difficult to separate the casting and welding molds from the cast lead parts.
The current treatment method is to use calcium carbide flame to passivate the casting and welding mold, but it is time-consuming and laborious, and the effect is lacking.

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  • Casting welding die and oxidation passivation method thereof

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] see figure 1 as shown, figure 1 A method for oxidation passivation of cast welding molds provided in an embodiment of the present invention comprises the following steps:

[0018] Step 101: Fill the cavity of the mold with oxidant powder, and then place it in a high-temperature environment to perform oxidation treatment for a predetermined time.

[0019] In this embodiment, the oxidizing agent powder is preferably lead dioxide powder with a lead dioxide mass ratio of more than 80% through a 200-mesh sieve. Lead dioxide has a strong oxidizing property. Under high temperature conditions, the surface of the casting and welding mold is oxidized into a layer of dense ferric oxide, which isolates the contact between the casting liquid and the ca...

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Abstract

The invention discloses an oxidation passivation method for a casting welding die, which comprises the following steps of: filling oxidant powder in a cavity of the casting welding die; oxidizing at high temperature for set time; naturally cooling the oxidized die; and cleaning oxidation residue in the cavity of the die. Compared with the prior art, the casting welding die and the oxidation passivation method thereof have the advantages that: the surface of the casting welding die is passivated by an oxidation method, and the demoulding effect of the casting welding die is improved.

Description

technical field [0001] The invention belongs to the technical field of casting and welding molds, and in particular relates to a casting and welding mold and an oxidation passivation method thereof. Background technique [0002] Due to processing defects, the cavity of the casting and welding mold inevitably has different degrees of concave and non-smooth defects. This defect is easy to cause the casting and welding mold and the casting to stick together, the demoulding effect is not good, and the quality of the cast casting is not high. Therefore, the casting and welding mold needs passivation treatment to make the inner surface of the cavity smooth, so that the casting is not only easy to demould from the casting and welding mold, but also the quality of the cast casting is relatively high. How to passivate casting and welding molds and improve casting quality has always been a problem that plagues the industry. [0003] Taking the production of batteries as an example, t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/60C23C12/00
Inventor 熊正林白福生
Owner ZHAOQING LEOCH BATTERY TECH