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Laser additive manufacturing technology of high-temperature alloy parts

A high-temperature alloy and laser additive technology, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve problems such as poor internal quality, deformation, cracking, etc., and achieve the effect of low cost, reduced manufacturing cost, and high efficiency

Inactive Publication Date: 2015-07-22
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the process of laser additive manufacturing of the above-mentioned high-temperature alloys, problems such as poor internal quality, deformation and cracking often occur

Method used

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  • Laser additive manufacturing technology of high-temperature alloy parts
  • Laser additive manufacturing technology of high-temperature alloy parts
  • Laser additive manufacturing technology of high-temperature alloy parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In Example 1, the whole impeller test piece of the steam turbine is manufactured by the laser additive manufacturing process. The test piece is a typical thin-walled rotary piece, and the process is as follows:

[0033] (1) Determine the basic process parameters of the superalloy: the laser additive manufacturing material used is: iron-based material of grade 43-X, and the specification is -100~+200 mesh. The process experiment of optimizing the basic process parameters of iron-based materials (grade 43-X) was carried out by using the orthogonal experiment method, and the effects of various process parameters including laser power, scanning speed, powder feeding rate, scanning distance, and layer thickness on the laser gain were obtained. The influence law of the shape and size of the forming layer of the material manufacturing, and then determine the specific process parameter range of the iron-based material (grade 43-X), as shown in Table 1.

[0034] Table 1

[0035...

Embodiment 2

[0046] This embodiment is an experimental piece of an engine blade manufactured by a laser additive manufacturing process, and adopts the same laser additive manufacturing process equipment as in Example 1 ( Figure 6 ),The difference is:

[0047] The superalloy powder is a nickel-based material (brand In625), and the determined range of process parameters is shown in Table 3.

[0048] Table 3 process parameter range

[0049] Experimental parameters

scope

laser power

2200W

scanning speed

8mm / s

Powder feeding rate

1g / min

layer thickness

0.9mm

scan pitch

1mm

[0050] Such as Figure 7 Shown is the actual picture of the experimental piece of the engine blade manufactured by the manufacturing process of this embodiment. With the relevant technical improvement measures of this embodiment, the processing quality, internal structure and related mechanical properties of the parts can all reach the industri...

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Abstract

The invention discloses a laser additive manufacturing technology of high-temperature alloy parts, and belongs to the technical field of laser additive manufacturing of metal powder. According to the invention, the technological parameter ranges of different high-temperature alloy materials are determined through basic technological experiments, and then additive manufacturing is carried out by adopting specific laser scanning paths and related internal defect control methods in the manufacturing process. The parts manufactured through the technology have the advantages that the forming efficiency is high, the cost is low, the internal quality is high, the automation degree is high and operation is easy. The high-temperature alloy parts capable of being applied industrially can be directly manufactured by adopting the technology, so that a new approach for manufacturing the high-temperature alloy parts is provided.

Description

technical field [0001] The invention relates to a high-temperature alloy powder laser additive manufacturing technology, in particular to a laser additive manufacturing process for high-temperature alloy parts. Background technique [0002] Additive manufacturing technology is to convert designed products into 3D data through CAD (computer-aided design) software, and then use specific molding equipment (ie additive manufacturing machines) to "manufacture" layer by layer with liquefied, powdered, and silky solid materials. "Out of the product. Additive manufacturing technology is also called "3D printing" or "rapid prototyping". The main molding methods of different additive manufacturing technologies according to the process include: stereolithography (SLA), layered solid manufacturing (LOM), laser selective sintering (SLS), fused deposition modeling (FDM) and metal near net shape. Different from traditional "removal" manufacturing, additive manufacturing technology can di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 赵宇辉赵吉宾王福雨来佑彬王志国
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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