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Composite alloy casting used for automobile engine pipe fittings and preparation technology thereof

A technology of automobile engine and composite alloy, which is applied in the direction of metal material coating technology, coating, solid diffusion coating, etc., can solve the problem of poor comprehensive performance of high temperature resistance, wear resistance and corrosion resistance, affecting service life and short repair cycle and other issues, to achieve the effect of improving wear resistance, prolonging service life, and improving overall quality

Inactive Publication Date: 2017-08-29
HANSHAN ZHAOXIA CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the car is in the process of forming, when the fuel passes through the fuel pipe, it will cause pulses, so that the fuel pipe and the pipe clamp will continue to collide and rub, and the fuel will also form a high-temperature environment, which will cause great damage to the automobile pipe. affected the service life
Existing automotive pipe fittings have poor comprehensive properties such as high temperature resistance, wear resistance, and corrosion resistance, and the repair cycle is short and economic benefits are low. Therefore, it is necessary to develop a high-quality pipe fitting that is resistant to high temperature, corrosion, and wear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A composite alloy casting for automobile engine pipe fittings, comprising an alloy pipe base and a coating, the alloy tube base is made of an aluminum alloy material, the coating is an N-Sc-W-Al multi-component composite coating, and the thickness of the coating is 12.4 μm.

[0020] The percentage content of each component in the coating is as follows: N 18%, Sc 10.8%, W 14%, Al balance; the aluminum alloy substrate includes the following percentage composition: Si 0.17%, Cr 0.9%, Mn 0.24%, Ti 0.16 %, Cu 3.88%, Fe0.45%, B 0.25%, Nb 0.16%, the balance is Al and unavoidable impurities, and also includes 0.1% of rare earth, the rare earth is the composition of Sc and La or Ce, Sc and The molar ratio of La or Ce is 1:0.8.

[0021] Composite alloy castings for automobile engine pipe fittings, the preparation process is as follows:

[0022] 1) Melt each alloy element in a medium-frequency induction furnace according to the proportion, adjust the temperature to 740±2°C after ...

Embodiment 2

[0026] A composite alloy casting for automobile engine pipe fittings, comprising an alloy pipe base and a coating, the alloy tube base is made of an aluminum alloy material, and the coating is an N-Sc-W-Al multi-component composite coating with a thickness of 11.1 μm.

[0027] The percentage content of each component in the coating is as follows: N 23%, Sc 11.2%, W 16%, Al balance; the aluminum alloy substrate includes the following percentage composition: Si 0.2%, Cr 1.4%, Mn 0.25%, Ti 0.17 %, Cu 3.92%, Fe 0.58%, B 0.18%, Nb 0.15%, the balance is Al and unavoidable impurities, and also includes 0.15% of rare earth, the rare earth is the composition of Sc and La or Ce, Sc and La Or the molar ratio of Ce is 1:1.

[0028] Composite alloy castings for automobile engine pipe fittings, the preparation process is as follows:

[0029] 1) Melt each alloy element in a medium-frequency induction furnace according to the proportion, adjust the temperature to 740±2°C after sampling and a...

Embodiment 3

[0033] A composite alloy casting for automobile engine pipe fittings, comprising an alloy pipe base and a coating, the alloy tube base is made of aluminum alloy, the coating is an N-Sc-W-Al multi-component composite coating, and the thickness of the coating is 10.6 μm.

[0034] The percentage content of each component in the coating is as follows: N 20%, Sc 10%, W 18%, Al balance; the aluminum alloy substrate includes the following percentage composition: Si 0.22%, Cr 2.2%, Mn 0.22%, Ti 0.15 %, Cu 3.9%, Fe 0.6%, B0.22%, Nb 0.12%, the balance is Al and unavoidable impurities, and also includes 0.2% of rare earth, the rare earth is the composition of Sc and La or Ce, Sc and The molar ratio of La or Ce is 1:1.2.

[0035] Composite alloy castings for automobile engine pipe fittings, the preparation process is as follows:

[0036] 1) Melt each alloy element in a medium-frequency induction furnace according to the proportion, adjust the temperature to 740±2°C after sampling and ana...

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Abstract

The invention provides a composite alloy casting used for automobile engine pipe fittings and a preparation technology thereof. The composite alloy casting used for the automobile engine pipe fittings comprises an alloy pipe base body and a clad layer. The alloy pipe base body is made of aluminum alloy materials. An N-Sc-W-Al multi-component composite coating is used as the clad layer. The thickness of the clad layer is 8.5-13 microns. The composite alloy casting is prepared through the steps of smelting, pretreatment, diffusion coating and the like. The prepared composite alloy casting has excellent high-temperature resistance and abrasion resistance, the mechanical property is good, the surface hardness reaches 2300HV or above, the binding force of the clad layer and the base body can reach 70N, the service life of products is greatly prolonged, and the comprehensive quality is improved obviously.

Description

technical field [0001] The invention relates to the technical field of auto parts preparation, in particular to a composite alloy casting for automobile engine pipe fittings and a preparation process thereof. Background technique [0002] With the rapid development of modern industry, people have higher and higher requirements for the reliability of pipe fittings, and at the same time, the requirements for the comprehensive performance and special performance of alloys are constantly increasing. As a pillar industry in the modern industry, automobiles have continuously improved the quality requirements of the pipe fittings used. For example, when the car is in the process of forming, when the fuel passes through the fuel pipe, it will cause pulses, so that the fuel pipe and the pipe clamp will continue to collide and rub, and the fuel will also form a high temperature environment, which will cause great damage to the automobile pipe. affected the service life. Existing pip...

Claims

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Application Information

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IPC IPC(8): C22C21/14C23C8/36C23C8/24
CPCC22C21/14C23C8/24C23C8/36
Inventor 黄远霞
Owner HANSHAN ZHAOXIA CASTING
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