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Metal demolding agent

A release agent, metal technology, applied in the directions of additives, petroleum industry, lubricating compositions, etc., can solve the problems of poor heat resistance, poor release performance of metal release agents, unstable performance, etc., to improve heat resistance, Good chemical stability, the effect of solving the quality instability

Active Publication Date: 2018-07-06
HUBEI ZHUOXI FLUOROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a metal release agent and its preparation method, and solve the technical problems of poor release performance, poor heat resistance and unstable performance of the metal release agent in the prior art

Method used

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preparation example Construction

[0015] The present embodiment also provides the preparation method of above-mentioned metal release agent, comprises the following steps:

[0016] (1) Prepare materials according to the following parts by weight: 70 to 90 parts of graphite fluoride, 5 to 25 parts of graphite, 1 to 3 parts of dispersant, and 0.1 to 0.5 parts of fluorosurfactant;

[0017] (2) Preparation of release agent: add dispersant to fluorinated graphite, stir and mix uniformly, then add graphite and fluorosurfactant to the above mixture, and stir and mix uniformly to obtain metal release agent.

[0018] In use, after the metal powder is granulated, add 0.02 to 0.1 part by weight of the above metal release agent to 100 parts of the metal powder, stir and mix evenly, and then add it to a mold stamping machine for stamping. Preferably, 0.04-0.08 parts of metal release agent is added to 100 parts of metal powder.

Embodiment 1

[0021] The present embodiment provides a kind of metal release agent, and it is made up of the raw material of following parts by weight:

[0022] Graphite fluoride (F / C ratio 1.1, 10-20um): 80 parts

[0023] Graphite (5~10um): 18 parts of calcined petroleum coke

[0024] Dispersant: sodium hexametaphosphate 2 parts

[0025] Fluorosurfactant: Sodium perfluorooctanoate 0.5 parts

[0026] The preparation method of above-mentioned metal release agent, comprises the steps:

[0027] (1) Prepare materials according to the following parts by weight: 80 parts of fluorinated graphite, 17.5 parts of calcined petroleum coke, 2 parts of sodium hexametaphosphate, and 0.5 part of sodium perfluorooctanoate;

[0028] (2) Preparation of release agent: add sodium hexametaphosphate to fluorinated graphite, stir and mix evenly, then add calcined petroleum coke and sodium perfluorooctanoate to the above mixture, and stir and mix evenly to obtain metal release agent.

[0029] Application: After...

Embodiment 2

[0032] This embodiment provides a metal release agent, the preparation method of which is the same as in Example 1, consisting of the following raw materials in parts by weight:

[0033] Graphite fluoride (F / C ratio 1.1, 10-20um): 70 parts

[0034] Graphite (5~10um): 25 parts of flake graphite

[0035] Dispersant: 1.5 parts of sodium hexametaphosphate, 1.5 parts of sodium oleate

[0036] Fluorosurfactant: 0.1 part of sodium perfluorooctane sulfonate.

[0037] Application: After the iron powder is granulated, add 0.04 parts of metal release agent to every 100 parts of metal powder, directly mix the metal release agent with the granulated iron powder and stir evenly, then add it to the mold stamping machine for stamping.

[0038] After the casting is formed, the surface is smooth, and there are no stretch marks on the surface of the mold and the casting.

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Abstract

The invention discloses a metal demolding agent which comprises the following raw materials in parts by weight: 70-90 parts of fluoride graphite, 5-25 parts of graphite, 1-3 parts of a dispersing agent and 0.1-0.5 part of a fluorinated surfactant. The metal demolding agent disclosed by the invention has the main components of fluoride graphite and graphite, the two substances are high in melting point and high in lubrication property, then a dense lubricating membrane can be formed on the surface of a mold, the flowability of a metal in the mold can be improved, and the smoothness and the flatness of the surface of a cast part can be maintained; due to addition of the dispersing agent, not only is the aggregation phenomenon of a powder demolding agent solved, but also the demolding capability of a metal cast part can be improved; due to addition of the fluorinated surfactant, not only is the viscosity of the metal cast part reduced, but also effective spreading of the fluoride graphiteand the graphite can be ensured; through the coordinated use of the substances in a certain ratio, the thermal resistance of the demolding agent can be improved, high chemical stability and excellentlubricating properties can be maintained, and both the cast part and the mold are free of residue.

Description

technical field [0001] The invention relates to a release agent, in particular to a metal release agent. Background technique [0002] Casting is one of the basic processes of the modern device manufacturing industry. It is a process in which metals are smelted into liquids that meet certain requirements and poured into molds. After cooling and solidification, castings with predetermined shapes, sizes and properties are obtained. Casting demoulding is a relatively important step in the casting process, which is directly related to the quality of casting products. Therefore, the release agent is the most important auxiliary material in casting demoulding, and its performance directly affects the quality of casting products. [0003] A release agent is an interface coating applied to the surface of two objects that tend to stick to each other, which makes the surface of the object easy to release, smooth and clean. In the casting process, the role of the release agent is to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M141/04C10M141/08C10N40/36C10N30/06C10N30/02
CPCC10M141/04C10M141/08C10M2201/041C10M2201/042C10M2201/085C10M2207/126C10M2219/044C10N2030/02C10N2030/06C10N2040/36C10N2010/02
Inventor 谢学归张雨寒谢子卓于铉谢洁珊
Owner HUBEI ZHUOXI FLUOROCHEM
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