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Coating for magnesium alloy metal mold casting as well as preparation method and applications thereof

A metal mold casting, magnesium alloy technology, applied in casting molding equipment, metal processing equipment, coating and other directions, can solve the problems affecting the quality of castings, waste of magnesium alloy raw materials, etc., to save raw materials and energy consumption, easy operation, surface smooth effect

Active Publication Date: 2015-07-08
福建镁孚科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the characteristics of strong activity of magnesium alloy, easy oxidation and combustion, reactive slag pores are easily generated on the mold contact surface during metal mold casting, which not only affects the quality of castings but also leads to waste of magnesium alloy raw materials

Method used

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  • Coating for magnesium alloy metal mold casting as well as preparation method and applications thereof
  • Coating for magnesium alloy metal mold casting as well as preparation method and applications thereof
  • Coating for magnesium alloy metal mold casting as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. The proportion of paint is as follows:

[0043]

[0044] 2. Use of paint:

[0045] Mix the paint evenly according to its ratio, and then spray the prepared paint on the preheated metal mold. The process specification is as follows:

[0046] Preheat the metal mold at 260°C and keep it warm for 2.5h;

[0047] Spray the paint, raise the temperature to 330°C, and keep it warm for 3 hours;

[0048] Ready to use.

[0049] The castings produced by this coating have no reactive slag pores, the surface of the castings is smooth, and the precision is high, while the castings produced by ordinary coatings have more serious defects. The specific surface appearance is as follows Figure 1-2 shown. The produced hubs have high precision and good quality, such as Figure 3-4 shown.

Embodiment 2

[0051] 1. The proportion of paint is as follows:

[0052]

[0053] 2. Use of paint:

[0054] Mix the paint evenly according to its ratio, and then spray the prepared paint on the preheated metal mold. The process specification is as follows:

[0055] Preheat the metal mold at 250°C and keep it warm for 4 hours;

[0056] Spray the paint, raise the temperature to 350°C, and keep it warm for 2 hours;

[0057] Ready to use.

[0058] The castings produced by this coating have no reactive slag pores, the surface of the castings is smooth, the precision is high, and the surface appearance is as follows: figure 2 As shown; and the produced hub has high precision and good quality.

Embodiment 3

[0060] 1. The proportion of paint is as follows:

[0061]

[0062]

[0063] 2. Use of paint:

[0064] Mix the paint evenly according to its ratio, and then spray the prepared paint on the preheated metal mold. The process specification is as follows:

[0065] Preheat the metal mold at 280°C and keep it warm for 2 hours;

[0066] Spray the paint, heat up to 300°C, and keep it warm for 3 hours;

[0067] Ready to use.

[0068] The castings produced by this coating have no reactive slag pores, the surface of the castings is smooth, the precision is high, and the surface appearance is as follows: figure 2 As shown; and the produced hub has high precision and good quality.

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Abstract

The invention relates to the field of metallurgy, and specifically relates to a coating for magnesium alloy metal mold casting as well as a preparation method and applications thereof. The coating for magnesium alloy metal mold casting disclosed by the invention comprises the following compositions in percentage by mass: 10-45% of CaCO3, 5-25% of graphite powder, 1-15% of weak acid, 0.1-10% of suspending agent, and the balance of water. The coating disclosed by the invention can be used for effectively solving the problem that magnesium alloys are easily oxidated and burned; in the process of casting, the coating not only can ensure the forming of castings, but also can form a protective atmosphere, thereby ensuring that magnesium alloys do not produce reactive slag blowholes in the processes of mold filling and solidification; the coating can be specially used for magnesium alloy metal mold casting, and the quality of produced magnesium alloy castings is far higher than that of common coatings; and the coating is low in cost and extremely has a market value.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a magnesium alloy metal mold casting coating and its preparation and application. Background technique [0002] Magnesium alloy is the lightest metal structure material (density is 1.65~1.73g / cm 3 ), has high specific strength, good rigidity, excellent impact resistance and shock absorption performance, and is widely used in aerospace and defense industry, automobile and electronic industry and other fields. [0003] At present, 90% of magnesium alloy castings are formed by die casting, and a few of them are formed by gravity sand casting. Due to the large investment, high technical requirements, poor market adaptability and inability to be used as high-strength force-bearing parts, die-casting restricts its vigorous development; and the castings obtained by sand casting have poor surface quality and low forming precision. its development. [0004] In order to meet the needs of produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
Inventor 张俊奇石秉钧苏其灿石惠娜石文渊
Owner 福建镁孚科技有限公司
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