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Laser solid forming method for high-entropy alloy member

A laser three-dimensional forming, high-entropy alloy technology, applied in the direction of improving energy efficiency, process efficiency, additive manufacturing, etc., can solve the problem of component segregation, reduce the performance of alloy components, restrict the application of high-entropy alloy components, poor machining and manufacturing performance, etc. problems, to achieve the effects of controllable performance, improved material utilization, and high forming efficiency

Active Publication Date: 2018-09-21
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, weak filling ability and poor machining performance have always been the problems restricting the preparation of high-entropy alloy components.
The combination of traditional casting and mechanical processing to prepare high-entropy alloy components is not only easy to introduce composition segregation, voids, and shrinkage cavities to reduce the performance of alloy components, but also has many manufacturing steps, complex processes, and a large amount of processing allowance. and other defects
Its material utilization rate is low, the manufacturing cost is high, and the preparation cycle is long, which seriously restricts the application of high-entropy alloy components in the field of advanced materials and defense industry

Method used

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  • Laser solid forming method for high-entropy alloy member
  • Laser solid forming method for high-entropy alloy member
  • Laser solid forming method for high-entropy alloy member

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] In this example, a high-entropy alloy round tube is prepared by a laser three-dimensional forming preparation method. The test piece belongs to a thin-walled rotating piece, and the process includes the following steps:

[0042] (1) Raw material preparation: FeCoNiMnCr spherical alloy powder with an average particle size of 100 μm, stainless steel base material;

[0043] (2) Raw material treatment: The FeCoNiMnCr spherical alloy powder was dried in a vacuum oven at 100 °C for 2 hours and then cooled naturally, and then loaded into the barrel of the powder feeder after cooling; Immerse the polished substrate in acetone in the beaker, and then place it in an ultrasonic cleaning apparatus for cleaning, and then repeat the polishing, immersion, and cleaning steps at least once, then dry the cleaned substrate, and then place into the forming chamber protected by inert gas, and fixedly clamped on the turntable for use.

[0044] (3) Determine the basic process parameters of h...

example 2

[0051] In this example, the high-entropy alloy blade is prepared by the laser three-dimensional forming preparation method. The process is the same as that of Example 1. The powder and laser additive manufacturing process is the same. The difference lies in the path planning and code generation: the three-dimensional model of the blade is divided into Layer slices, each layer can be stacked by a single linear scan, but the scanning direction of each layer is tilted at a certain angle around the C-axis of the turntable. image 3 The actual picture of the experimental piece of the blade prepared by the method of this example is shown.

[0052] Using the method of this example, three kinds of process parameters as shown in the following table 1 were selected to manufacture high-entropy alloy blades respectively, and the high-entropy alloy blades manufactured under different process conditions were analyzed by optical microscope, and the following results were obtained: Figure 4 ...

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Abstract

The invention discloses a laser solid forming method for a high-entropy alloy member. The method comprises the steps of (1) raw material preparation; (2) raw material treatment; (3)route planning forlaser layer-by-layer fusion stackinghigh-entropy alloy; (4)laser solid forming ofthe high-entropy alloy member. The method is that through anorthogonal experiment, a process optimization parameter range of high-entropy alloy preparation is determined based on a large number of experiments, the influence rule of process parameters of laser power, air supply volume, scanning speed, power feed rate,scanning distance, layer thickness and the like on laser solid formingsingle track shapes and sizes of the high-entropy alloy member, the process parameter range is further determined, and the laser solid forming of the high-entropy alloy member is completed. The prepared high-entropy alloy member has the advantages of high forming efficiency, low cost, controllable internal organizations, high automation, easy operation and the like.

Description

technical field [0001] The invention belongs to the field of material science and advanced manufacturing, and in particular relates to a laser three-dimensional forming method of a high-entropy alloy component. Background technique [0002] Due to its high strength, good wear resistance, high work hardening, high temperature softening resistance, high temperature oxidation resistance, corrosion resistance and radiation resistance, high-entropy alloys have important application prospects in nuclear power, anti-corrosion and military fields. . [0003] However, weak filling ability and poor machining performance have always been the difficult problems restricting the preparation of high-entropy alloy components. The traditional method of casting and machining to prepare high-entropy alloy components is not only easy to introduce component segregation, voids and shrinkage cavities to reduce the performance of the alloy components, but also has many manufacturing steps, complex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00B33Y50/02
CPCB22F3/003B33Y10/00B33Y50/02B22F10/00B22F10/12B22F10/366B22F10/28Y02P10/25B22F10/30
Inventor 李晋锋向硕乐国敏刘学白林瑞马斌斌
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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