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Die casting material and hole patching method thereof, die casting material surface electroplating method and die casting outer part

An electroplating treatment and hole filling technology, which is applied in the surface electroplating treatment of die-casting materials and the field of die-casting appearance parts, can solve the problems of organic matter loosening and falling off, differences in physical and chemical properties, and polluting the plating solution, and achieve the effect of reducing porosity and porosity

Inactive Publication Date: 2017-03-01
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of the method of sealing holes with organic matter are: organic matter will pollute the plating solution, and it is not suitable for electroplating after the organic matter is sealed. On products with coating or sealing as the outer surface, so it is not widely applicable
When the sealing hole is used as the outer surface, due to the difference in physical and chemical properties between the organic matter and the metal material, the organic matter is easy to loosen and fall off in the hole in a complex environment, resulting in a reduced sealing effect

Method used

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  • Die casting material and hole patching method thereof, die casting material surface electroplating method and die casting outer part

Examples

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Effect test

Embodiment 1

[0041] This example is used to illustrate the method for repairing holes of the present invention and the die-casting material and the method for surface electroplating treatment of the die-casting material and the die-casting appearance part produced therefrom.

[0042] (1) Degreasing treatment: Prepare a degreasing solution; heat the prepared degreasing solution to 50°C and keep it warm for 25 minutes; put the die-casting aluminum alloy plate (Japanese aluminum alloy plate with brand ADC12) in the degreasing solution and perform ultrasonication at 50°C Degrease for 10 minutes; then wash the die-casting aluminum alloy plate with water, wherein the composition of the degreasing solution is: 20g / L sodium phosphate, 15g / L sodium carbonate, 5g / L sodium tripolyphosphate, 10g / L sodium silicate, 1g sodium metasilicate / L, sodium hydroxide 5g / L, OP-101g / L, the solvent is water.

[0043] (2) Pickling treatment: prepare 15% nitric acid aqueous solution; then soak the degreased die-cast...

Embodiment 2

[0050] This example is used to illustrate the method for repairing holes of the present invention and the die-casting material and the method for surface electroplating treatment of the die-casting material and the die-casting appearance part produced therefrom.

[0051] According to the steps (1), (2), (3) and (4) of Example 1, the degreasing treatment, pickling treatment, polishing treatment and galvanizing treatment of the die-casting aluminum alloy plate are carried out respectively;

[0052] (5) Tin plating: configure the plating solution; adjust the pH value of the plating solution to 0.6; heat to 80°C and keep it warm for 30 minutes; then place the zinc-dipped die-cast aluminum alloy plate in the plating solution and dip and deposit at 80°C for 5 hours , to obtain a coating thickness of 20 μm. Among them, the composition of the plating solution is: stannous chloride 45g / L, tartaric acid 32g / L, thiourea 20g / L, citric acid 27g / L, sodium hypophosphite 23g / L, hydroquinone 2...

Embodiment 3

[0056] This example is used to illustrate the method for repairing holes of the present invention and the die-casting material and the method for surface electroplating treatment of the die-casting material and the die-casting appearance part produced therefrom.

[0057] According to the steps (1), (2), (3) and (4) of Example 1, the degreasing treatment, pickling treatment, polishing treatment and galvanizing treatment of the die-casting aluminum alloy plate are carried out respectively;

[0058] (5) Tin plating: configure the plating solution; adjust the pH value of the plating solution to 1.2; heat to 85°C and keep it warm for 30 minutes; h, the thickness of the obtained coating is 15 μm. Among them, the composition of the plating solution is: stannous chloride 50g / L, tartaric acid 35g / L, thiourea 25g / L, citric acid 30g / L, sodium hypophosphite 28g / L, hydroquinone 3g / L, polyethylene glycol Diol 60025mL / L, hydrochloric acid 100mL / L, solvent is water.

[0059] (6) Hole fillin...

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Abstract

The invention relates to a die casting material with a plating layer, and a hole patching method of the die casting material. The method comprises the following steps: the die casting material with the metal plating layer is insulated and cooled; metal for forming the metal plating layer is tin and / or lead; and the insulation temperature is higher than the melting point of the metal plating layer, and is lower than the melting point of the die casting material. The invention further relates to the die casting material manufactured by the method, a die casting material surface electroplating method and a die casting outer part electroplated by the method. The die casting material obtained by the hole patching method prominently reduces the porosity, and forms a compact, complete, uniform and continuous layer on the surface; and the hole-patched die casting material is electroplated, so that the porosity of the outer part with the plating layer can be further reduced, the problem of a die casting material with defects in the prior art unsuitable for serving as an outer part is solved, and the application range of the die casting material to outer products is widened.

Description

technical field [0001] The invention relates to a method for repairing holes of die-casting materials, a die-casting material prepared by the method, and a method for surface electroplating treatment of the die-casting material, and a die-casting appearance part obtained by the method. Background technique [0002] The characteristic of die-casting materials is that the material is not dense enough, and contains a large number of defects in its interior and near the surface. Such defects are generally pores and pinholes. These defects are generally formed by the entrainment of gas when the material is rapidly filling the mold during the die-casting process. The defects are generally irregular circular holes with a diameter of several microns to hundreds of microns and a depth of several microns to hundreds of microns. The defects are irregularly distributed. In the material, therefore, no matter how thick the surface layer of the material is removed, new defects appear on ea...

Claims

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Application Information

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IPC IPC(8): B22D45/00
Inventor 熊贻婧连俊兰林宏业
Owner BYD CO LTD
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