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Aluminum-silicon-zinc-rare earth-containing hot dip coating alloy and method for preparing same

A hot-dip plating and alloying technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problems of easy loss of protective effect, aggravate parts failure, loss of anti-corrosion effect, etc., to improve the resistance to contact corrosion. ability, improved contact corrosion resistance, improved erosion resistance

Active Publication Date: 2010-06-16
JIANGSU LINLONG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although some achievements have been made in the prevention of contact corrosion of titanium alloys at home and abroad, there are certain problems in the current methods, mainly because the coating layer used is easy to lose the protective effect under the synergistic effect of environment and stress. Conventional methods on the surface of titanium alloys The plating coating is easy to peel off under the contact load, and it is easy to lose the anti-corrosion effect. The peeled off fragments cause abrasive wear between the contact parts and aggravate the failure of the parts. Therefore, a large number of titanium alloy fasteners in the aircraft are urgently needed. Need to address failures due to contact corrosion

Method used

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  • Aluminum-silicon-zinc-rare earth-containing hot dip coating alloy and method for preparing same
  • Aluminum-silicon-zinc-rare earth-containing hot dip coating alloy and method for preparing same
  • Aluminum-silicon-zinc-rare earth-containing hot dip coating alloy and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The hot-dip alloy is made of aluminum, silicon, zinc, rare earth elements and TiO 2 Composed of nano-oxide particle reinforcement, the percentage of each component to the total mass is: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, TiO 2 Content: 1 to 2%, the balance is aluminum, see the following table 1 for details:

[0042] Table 1: The mass percentage content (%) and related index parameters of each component in the total weight

[0043]

Embodiment 2

[0045] The hot-dip alloy is made of aluminum, silicon, zinc, rare earth elements and CeO 2 Composed of nano-oxide particle reinforcement, the percentage of each component to the total mass is: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, CeO 2 Content: 1 to 2%, the balance is aluminum, see the following table 2 for details:

[0046] Table 2: The mass percentage content (%) and related index parameters of each component in the total weight

[0047]

Embodiment 3

[0049] The hot-dip alloy is composed of aluminum, silicon, zinc, rare earth elements and nano-oxide particle reinforcing agent, wherein the nano-oxide particle is TiO 2 and CeO 2 , and TiO 2 and CeO 2 The ratio is 1: (1~3), and the percentages of each component to the total mass are: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, TiO 2 and CeO 2 The total content of aluminum alloy: 1~2%, the balance is aluminum, see the following table 3 for details:

[0050] Table 3: The mass percentage content (%) and related index parameters of each component accounting for the total weight

[0051]

[0052] In embodiment 1-3, preferably, wherein each component accounts for the total mass percentage as follows: silicon content: 12-20%, zinc content: 1.5-2.5%, rare earth element content: 0.1-0.3%, nano oxide particles The total content of enhancer: 1.2~1.8%

[0053] More preferably, the silicon content is preferably 15-20%, more preferably 19%...

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Abstract

The invention relates to hot dip coating alloy specially used for surface coatings of titanium alloy parts. The hot dip coating alloy consists of aluminum, silicon, zinc, rare earth elements and reinforcing agent of particles of nano oxides, and based on the total weight of the alloy, the alloy comprises 8 to 24 percent of silicon, 1.2 to 3.1 percent of zinc, 0.02 to 0.5 percent of rare earth elements, 1 to 2 percent of reinforcing agent of particles of nano oxides, and the balance of aluminum and inevitable impurities, wherein the reinforcing agent of the particles of the nano oxides may be one or two of TiO2 and CeO2. The hot dip coating alloy produced by the method can form a coating with good corrosion resistance and wearing resistance and good metallurgical bonding property with a matrix on the surface of the titanium alloy.

Description

technical field [0001] The invention relates to a hot-dipping alloy containing aluminum-silicon-zinc-rare earth for surface coating of titanium alloy parts and a preparation method thereof. Background technique [0002] Titanium alloy has the advantages of high strength and strong corrosion resistance, so it has become an important aerospace material. The use of titanium alloy is of great significance to reduce the weight of the aircraft and improve the performance of the aircraft. However, titanium alloy itself has good corrosion resistance. However, when it is in contact with aluminum alloy and alloy steel, under the synergistic effect of stress and environment, it is prone to contact corrosion and lead to failure. [0003] Contact corrosion is a kind of galvanic corrosion, that is, dissimilar metals are in contact in the same medium. Due to the different metal potentials, the metal with a lower potential dissolves faster, resulting in localized corrosion at the contact....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C22C21/02C22C1/02
Inventor 冯立新张敏燕张平则
Owner JIANGSU LINLONG NEW MATERIALS
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