Preparation method for coating for aluminium alloy squeeze casting

A technology of squeeze casting and aluminum alloy, which is applied in casting molding equipment, metal processing equipment, coating, etc., can solve problems affecting the service life of castings, material heat preservation, gas-generating thixotropic defects, etc., and achieve data Accurate and detailed, strong adhesion, reasonable material ratio effect

Inactive Publication Date: 2015-10-21
ZHONGBEI UNIV
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  • Abstract
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Problems solved by technology

[0004] At present, the coatings used in extrusion casting of non-ferrous metal aluminum alloys are water-based colloidal graphite coatings and oil-based colloidal graphite coatings. These coatings have certain lubricity and can meet the requirements for mold release performance in casting, but in There are defects in the thermal insulation, gas generation and thixotropy of the material; the temperature of the mold during the extrusion process will directly affect the performance of the casting and the service life of the mold, which requires the coating to have Good strength and bonding performance, but also requires the thermal insulation performance of the coating to control the cooling rate of the molten metal; currently used coatings are difficult to meet these technical requirements

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  • Preparation method for coating for aluminium alloy squeeze casting
  • Preparation method for coating for aluminium alloy squeeze casting

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with accompanying drawing:

[0053] figure 1 As shown in the figure, it is the rolling state diagram of the coating for aluminum extrusion casting. The position of each part must be correct, the proportion should be proportioned, and the operation should be done in sequence.

[0054] Quantities of the chemical substances used in the preparation are determined according to a preset range, with grams and milliliters as measurement units.

[0055] The rolling of the coating slurry for extrusion casting of aluminum alloy is carried out on the rolling machine, which is completed in the process of rolling and adding water;

[0056] The rolling machine is vertical, the bottom of the rolling machine is a console 1, the upper part of the console 1 is a lower disc 6, the upper part of the lower disc 6 is an upper disc 7, and the upper part of the upper disc 7 is connected to a rolling motor 8. The top of rolli...

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Abstract

The invention relates to a preparation method for a coating for aluminium alloy squeeze casting. According to the preparation method, talcum powder and diatomite are taken as refractory aggregate, aluminium phosphate is taken as a binding agent, xanthan gum and bentonite are taken as suspending agents, deionized water is taken as a carrier liquid solvent, and the coating for aluminium alloy squeeze casting is prepared through solution preparation, slurry mixing, stirring, rolling compaction and aging. The coating is viscous liquid, has high binding power, a high uniformity degree and a high fixation degree, and reaches the gas-forming property of 6.12mL/g, the heat conduction coefficient of 0.4,096W*m<-1>*K<-1> and the suspension rate of 99%. The preparation method is technologically advanced, has a short technological process, is high in speed, full and accurate in data and reasonable in material matching, and is an ideal preparation method for the coating for aluminium alloy squeeze casting.

Description

technical field [0001] The invention relates to a method for preparing a coating for aluminum alloy squeeze casting, which belongs to the technical field of preparation and application of nonferrous metal casting auxiliary materials. Background technique [0002] Squeeze casting is an advanced casting process, especially the squeeze casting of non-ferrous metal aluminum alloys is the most widely used. Squeeze casting is mostly used in the molding of special-shaped parts in machinery manufacturing, automobile industry, and aerospace industry. [0003] In the extrusion casting of non-ferrous aluminum alloys, coatings must be used for the metal molds to ensure smooth demoulding after die-casting during the extrusion process, so as to better ensure the shape, metal uniformity and product quality of the castings. [0004] At present, the coatings used in extrusion casting of non-ferrous metal aluminum alloys are water-based colloidal graphite coatings and oil-based colloidal grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22D18/02
Inventor 赵宇宏靳玉春侯华刘占凯王萍萍
Owner ZHONGBEI UNIV
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