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Aluminum-silicon-zinc-rare earth-ferrum-chromium-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, etc., can solve the problems of easy loss of protective effect, aggravate part failure, loss of anti-corrosion effect, etc., to improve contact corrosion resistance Ability, improvement of contact corrosion resistance, improvement of 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-ferrum-chromium-containing hot dip coating alloy and method for preparing same
  • Aluminum-silicon-zinc-rare earth-ferrum-chromium-containing hot dip coating alloy and method for preparing same
  • Aluminum-silicon-zinc-rare earth-ferrum-chromium-containing hot dip coating alloy and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The hot-dip alloy is composed of aluminum, silicon, zinc, iron, chromium, rare earth elements and TiO 2 It is composed of nano-oxide particle reinforcing agent, the percentage of each component in the total mass is: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, iron content: 0.05-1 %, chromium content: 0.5~2.0%, TiO 2 The content: 1 to 2%, the balance is aluminum, see Table 1 below for details:

[0043] Table 1: The mass percentage content (%) of each component in the total weight and related index parameters

[0044]

Embodiment 2

[0046] The hot-dip plating alloy is composed of aluminum, silicon, zinc, iron, chromium, rare earth elements and CeO 2 It is composed of nano-oxide particle reinforcing agent, the percentage of each component in the total mass is: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, iron content: 0.05-1 %, chromium content: 0.5~2.0%, CeO 2 The content: 1~2%, the balance is aluminum, see Table 2 below for details:

[0047] Table 2: The mass percentage content (%) of each component in the total weight and related index parameters

[0048]

Embodiment 3

[0050] The hot-dip plating alloy is composed of aluminum, silicon, zinc, iron, chromium, rare earth elements and nano-oxide particle enhancers, wherein the nano-oxide particles are TiO 2 And CeO 2 , And TiO 2 And CeO 2 The ratio is 1: (1~3), the percentages of each component in the total mass are: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, iron content: 0.05 ~1%, chromium content: 0.5~2.0%, TiO 2 And CeO 2 The total content: 1 to 2%, the balance is aluminum, see Table 3 below for details: Table 3: The mass percentage content (%) of each component in the total weight and related index parameters

[0051]

[0052] In embodiment 1-3, preferably, the components in the total mass percentage are: silicon content: 12-20%, zinc content: 1.5-2.5%, rare earth element content: 0.1-0.3%, iron content: 0.2 ~0.8%, chromium content: 0.8~2.0%, total content of nano oxide particle reinforcing agent: 1.2~1.8%

[0053] More preferably, wherein the silicon c...

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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, ferrum, chromium 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, 0.05 to 1 percent of ferrum, 0.5 to 2.0 percent of chromium, 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-dip plating alloy containing aluminum-silicon-zinc-rare earth-iron-chromium 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 and has become an important aviation material. The use of titanium alloys is of great significance for reducing aircraft weight and improving aircraft performance. 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, contact corrosion is prone to cause 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 dissolution rate of metals with lower potentials is accelerated, resulting in local corrosion at the contact. Th...

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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