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Aluminum mold of auto engine and preparation method thereof

A technology for automobile engines and aluminum molds, which is applied in the direction of engine components, mechanical equipment, manufacturing tools, etc., and can solve problems such as poor quality of anti-corrosion treatment, complicated treatment process, and low treatment efficiency

Inactive Publication Date: 2020-10-27
张宗洲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing metal mold surface anti-corrosion treatment mainly has defects such as complicated treatment process, low treatment efficiency, and poor anti-corrosion treatment quality.

Method used

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  • Aluminum mold of auto engine and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A preparation method for an automobile engine aluminum mold, comprising the steps of:

[0046] (1) Preparation of polytetrafluoroethylene coating:

[0047] The specific implementation measures are

[0048] (1) Pretreat the aluminum mold, hang the parts to be plated, degrease and degrease, wash with water, and pickle and activate in sequence;

[0049] (2) The surface is polished to a roughness Ra of 0.3 μm, and deionized water is cleaned in ultrasonic waves;

[0050] (3) Put the parts to be plated into the pre-plating solution and soak for 30 minutes, nickel powder in the pre-plating solution: polytetrafluoroethylene = 2:1;

[0051] (4) Soak in hydrochloric acid solution with a volume concentration of 250mL / L for 12h;

[0052] (5) Configure the electroplating solution: include 2% short fiber, 15% nickel chloride, 5% sodium citrate, 35% nickel sulfate, 20% polytetrafluoroethylene particles, 2.5% vinyl fluoride, 5% of perfluoroalkyl compound, 5% of propylene copolymer,...

Embodiment 2

[0070] The preparation method of embodiment 2 is the same as that of embodiment 1, and the difference is that in embodiment 2, no zirconia anti-corrosion layer is coated, and only a buffer layer and a graphene wear-resistant layer are coated on the surface of the aluminum mold body.

[0071] Wherein, the buffer layer has a thickness of 120 μm, the graphene wear-resistant layer has a thickness of 80 μm, and the zirconia anticorrosion layer has a thickness of 170 μm.

Embodiment 3

[0073] The preparation method of embodiment 3 is the same as that of embodiment 1, and the difference is that in the embodiment, the graphene wear-resistant layer and the zirconia anti-corrosion layer are not coated, and only the buffer layer is coated on the surface of the aluminum mold body.

[0074] Carry out anti-corrosion performance contrast test with the aluminum mold of embodiment 1~Example 3, carry out anti-corrosion test in 5wt% Nacl solution, experimental result is as follows figure 1 shown. Experiments have shown that the aluminum mold sample coated with both graphene layer and anti-corrosion layer can effectively inhibit the corrosion of salt solution, and then achieve the purpose of anti-corrosion.

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Abstract

The invention provides an aluminum mold of an auto engine and a preparation method thereof. The aluminum mold is successively provided with an aluminum mold body, a buffer layer, a graphene wear-resistant layer and a zirconium oxide corrosion-resistant layer from inside to outside, wherein the buffer layer is a nickel-polytetrafluoroethylene coating and covers the outer surface of the aluminum mold body, and the graphene wear-resistant layer is arranged between the buffer layer and the zirconium oxide corrosion-resistant layer. By coating the surface of the aluminum mold in multiple layers, the aluminum mold has excellent chemical stability and corrosion resistance and good ageing resistance.

Description

technical field [0001] The invention relates to the technical field of moulds, in particular to a wear-resistant and anti-corrosion aluminum mold suitable for automobile engines and a preparation method thereof. Background technique [0002] The mold industry is the core of the development of the entire processing manufacturing industry and the main equipment for parts production. The production of workpieces with molds has the characteristics of high precision, high productivity and low power consumption, which is unmatched by other manufacturing processes. Therefore, the mold industry has become one of the important symbols of a country's machinery manufacturing level. [0003] Automobile molds are the main basic process equipment in the automobile manufacturing industry. More than 90% of an auto part is formed by die stamping, and the production of parts is highly dependent on the die process. In developed countries, more than 40% of auto molds serve the auto industry, ...

Claims

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Application Information

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IPC IPC(8): C23F17/00C25D7/00C25D15/00C23C26/00C23F11/02B21D37/01B21D37/10B21D53/84
CPCB21D37/01B21D37/10B21D53/84C23C26/00C23F11/02C23F17/00C25D7/00C25D15/00
Inventor 张宗洲
Owner 张宗洲
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