Laser selective melting forming method of copper-chromium alloy part

A technology of laser selective melting and copper-chromium alloy, which is applied in the direction of process efficiency improvement, energy efficiency improvement, additive processing, etc., can solve the problems such as the production efficiency of complex parts that cannot be directly formed, achieve the application value of mass production, and shorten the production cycle , The effect of improving the forming efficiency

Inactive Publication Date: 2019-05-17
XIAN BRIGHT ADDTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a laser selective melting forming method for copper-chromium alloy parts, which solves the problem that complex parts cannot be directly formed and the production efficiency is low during the forming process of existing copper-chromium alloy materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A laser selective melting and forming method of a copper-chromium alloy part of the present invention is specifically implemented according to the following steps:

[0040] Step 1, pretreating the Cu-Cr alloy powder;

[0041] Cu-Cr alloy powder is composed of the following components according to the mass fraction: Cr accounts for 5% of the mass fraction, Cu is the balance, and the sum of the percentages of the above components is 100%;

[0042] The pretreatment is as follows: dry the Cu-Cr alloy powder in a vacuum environment oven with a temperature of 100°C and an atmospheric pressure not greater than -0.05MPa for 2 hours, then take it out after vacuum cooling for 2 hours, and then sieve the powder with a 200-mesh sieve to obtain ;

[0043] Among them, the particle size of Cu-Cr alloy powder is between 10-53um;

[0044] Step 2, preparation of program files and SLM equipment before forming;

[0045] Step 2.1, preparation of program files;

[0046] First use the 3D ...

Embodiment 2

[0053] A laser selective melting and forming method of a copper-chromium alloy part of the present invention is specifically implemented according to the following steps:

[0054] Step 1, pretreating the Cu-Cr alloy powder;

[0055] Cu-Cr alloy powder is composed of the following components according to the mass fraction: Cr accounts for 10% of the mass fraction, Cu is the balance, and the sum of the percentages of the above components is 100%;

[0056] The pretreatment is as follows: dry the Cu-Cr alloy powder in a vacuum environment oven with a temperature of 130°C and an atmospheric pressure not greater than -0.05MPa for 4 hours, then take it out after vacuum cooling for 2 hours, and then sieve the powder with a 240-mesh sieve to obtain ;

[0057] Among them, the particle size of Cu-Cr alloy powder is between 10-53um;

[0058] Step 2, preparation of program files and SLM equipment before forming;

[0059] Step 2.1, preparation of program files;

[0060] First use the 3D...

Embodiment 3

[0067] A laser selective melting and forming method of a copper-chromium alloy part of the present invention is specifically implemented according to the following steps:

[0068] Step 1, pretreating the Cu-Cr alloy powder;

[0069] Cu-Cr alloy powder is composed of the following components according to the mass fraction: Cr accounts for 20% of the mass fraction, Cu is the balance, and the sum of the percentages of the above components is 100%;

[0070] The pretreatment is as follows: dry the Cu-Cr alloy powder in a vacuum environment oven with a temperature of 100-150°C and an atmospheric pressure not greater than -0.05MPa for 2-5 hours, then take it out after vacuum cooling for 2 hours, and then use a 220-mesh screen to sieve powder, that is;

[0071] Among them, the particle size of Cu-Cr alloy powder is between 10-53um;

[0072] Step 2, preparation of program files and SLM equipment before forming;

[0073] Step 2.1, preparation of program files;

[0074] First use the...

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Abstract

The invention discloses a laser selective melting forming method of a copper-chromium alloy part. The laser selective melting forming method specifically comprises the following steps of preprocessingCu-Cr alloy powder, preparing a program file and a SLM device, finally melting the selective laser to form a copper-chromium alloy part. The laser selective melting technology can directly form complex parts, shorten the production period and improve the forming efficiency, and the method has a great production application value; in addition, the cooling rate can reach 106 orders of magnitude, asmaller molten pool range and a molten pool can be rapidly cooled, and the liquid phase layering phenomenon in the traditional process is overcome.

Description

technical field [0001] The invention belongs to the technical field of laser selective melting technology rapid prototyping methods, and in particular relates to a laser selective melting forming method for copper-chromium alloy parts. Background technique [0002] Cu-Cr alloy refers to a series of alloys formed by adding Cr and other trace alloy elements with Cu as the matrix. Because of its high strength and hardness after heat treatment, good electrical and thermal conductivity and corrosion resistance, at present, it is mainly used It is used in the preparation of resistance welding electrodes, contact materials, integrated circuit lead frames, overhead wires of trams and electric trains, steering gears of electric tools, rotor wires of large high-speed turbine generator rotors, electrical plugs, switches, motor collector rings, etc. High-conductivity and high-strength products, Cu-Cr alloys are also used in heat exchange environments that are not directly related to con...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00B33Y50/02
CPCY02P10/25
Inventor 张宝宁赵晓明赵伟王雷
Owner XIAN BRIGHT ADDTIVE TECH CO LTD
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