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Selective laser melting forming method for nickel-based superalloy

A nickel-based superalloy, laser selective melting technology, applied in the field of additive manufacturing, can solve the problems of long preparation cycle and complex process, achieve the effect of improving comprehensive mechanical properties, reducing production cycle, and improving industrial application prospects

Pending Publication Date: 2021-06-04
飞而康快速制造科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The laser process parameters used in this process are not suitable for K438 superalloy, and the process uses Stellite6 superalloy for stacking and arrangement, and the process is more complicated
[0005] CN108274001A discloses a TC4 titanium alloy laser additive manufacturing process, which uses laser to melt and solidify each layer of TC4 titanium alloy powder, and then immediately conducts low-temperature inert gas treatment, the preparation cycle is long, and the laser process it adopts Parameters not applicable to K438 superalloy

Method used

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  • Selective laser melting forming method for nickel-based superalloy
  • Selective laser melting forming method for nickel-based superalloy
  • Selective laser melting forming method for nickel-based superalloy

Examples

Experimental program
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Effect test

Embodiment 1

[0084] This embodiment provides a method and device for laser selective melting and forming of a nickel-based superalloy. The structural schematic diagram of the device is as follows figure 1 shown.

[0085] The device includes a powder supply cabin 1, a scraper system 2, a laser system 4, a laser galvanometer system 5, a forming cabin 8 and a powder recovery cabin 7;

[0086] The powder supply cabin 1, the forming cabin 8 and the powder recovery cabin 7 are sequentially connected; the scraper system 2 can move in parallel from the powder supply cabin 1 to the powder recovery cabin 7; the laser system 4 and the laser galvanometer system 5 are suspended Above the powder supply cabin 1 and the forming cabin 8;

[0087] The powder supply cabin 1 , the forming cabin 8 and the powder recovery cabin 7 are all provided with a liftable platform 9 .

[0088] The method for performing laser selective melting and forming of nickel-base superalloy by using the above-mentioned device com...

Embodiment 2

[0095] This embodiment provides a method for laser selective melting of a nickel-based superalloy, and the device used in the method refers to the device in Embodiment 1.

[0096] The method comprises the steps of:

[0097] (1) The average particle size is 28μm, the Hall flow rate is 20s, and the bulk density is 4.4g / cm 3 , the K438 nickel-based superalloy powder with a spherical rate of 88% is spread on a platform substrate at 200 ° C, and the thickness of each layer of powder is 35 μm. Scanning and contour laser scanning, the scanning methods include strip scanning and rotary scanning, the strip width of strip scanning is 12mm and there is no gap between each strip, during the scanning process, the strip between adjacent two layers rotates clockwise 31°;

[0098] The process parameters of the physical laser scanning include: laser spot diameter of 110 μm, laser power of 220 W, laser scanning speed of 950 mm / s, adjacent laser scanning lines in opposite directions with a spa...

Embodiment 3

[0102] This embodiment provides a method for laser selective melting of a nickel-based superalloy, and the device used in the method refers to the device in Embodiment 1.

[0103] The method comprises the steps of:

[0104] (1) The average particle size is 30μm, the Hall flow rate is 15s, and the bulk density is 4.5g / cm 3, the K438 nickel-based superalloy powder with a spherical rate of 87% is spread on a platform substrate at 150 ° C, and the thickness of each layer of powder is 32 μm. Scanning and profile laser scanning, the scanning methods include strip scanning and rotary scanning, the strip width of strip scanning is 12 is 9mm and there is no gap between each strip, during the scanning process, the strip between adjacent two layers rotates clockwise 57°;

[0105] The process parameters of the physical laser scanning include: laser spot diameter of 100 μm, laser power of 215 W, laser scanning speed of 900 mm / s, adjacent laser scanning lines in opposite directions with a...

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Abstract

The invention provides a selective laser melting forming method for nickel-based superalloy. The method comprises the following steps that nickel-based superalloy powder is laid on a platform substrate, and solid laser scanning and contour laser scanning are sequentially carried out on each layer of powder under a protective atmosphere to obtain a semi-finished product of a nickel-based superalloy part; and two-stage vacuum heat treatment is carried out on the obtained semi-finished product of the nickel-based superalloy part to obtain the nickel-based superalloy part. According to the method, a selective laser melting forming process is adopted according to the characteristics of a nickel-based superalloy material, the comprehensive mechanical performance of the nickel-based superalloy is improved through two-stage vacuum heat treatment, and the nickel-based superalloy has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for laser selective melting and forming of a nickel-based superalloy. Background technique [0002] K438 is one of the nickel-based superalloys with medium high-temperature strength and good structural stability. It is widely used in turbine blades and guide vanes of gas turbines and turbine parts of aero-engines. The traditional manufacturing method of K438 superalloy is to cast the blank and finally reduce the material into the workpiece. This method not only wastes raw materials, but also for the processing and manufacturing of some complex parts, the processing process is complicated and time-consuming, and even some more Complex structural parts are difficult to complete by traditional manufacturing methods; moreover, some loose shrinkage and shrinkage cavities are unavoidable in the process of casting master alloys, and hot isostatic pres...

Claims

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Application Information

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IPC IPC(8): B22F10/28B22F10/64B22F10/366B33Y10/00B33Y80/00B33Y70/00B33Y40/20C22F1/10C22F1/02C22C19/05
CPCB33Y10/00B33Y80/00B33Y70/00B33Y40/20C22F1/10C22F1/02C22C19/056Y02P10/25
Inventor 汪承杰刘慧渊计霞沈于蓝陈志茹周耀高桦余佩鸿许停停
Owner 飞而康快速制造科技有限责任公司
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