Method for preparing K418 nickel-based high temperature alloy charging turbine based on selective laser melting forming technology

A laser selective melting, nickel-based superalloy technology, applied in turbines, mechanical equipment, additive manufacturing, etc., can solve problems such as high cost, long cycle, and many defects, achieve rapid development and verification, avoid parts defects, and guarantee products performance effect

Pending Publication Date: 2021-02-19
AEROSPACE HIWING HARBIN TITANIUM IND
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Problems solved by technology

[0004] Aiming at the problems of many defects, high cost and long period in the development stage of the supercharger in the traditional casting process, the present invention provides a method for preparing a K418 nickel-based superalloy supercharger based on the laser selective melting forming technology.

Method used

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  • Method for preparing K418 nickel-based high temperature alloy charging turbine based on selective laser melting forming technology
  • Method for preparing K418 nickel-based high temperature alloy charging turbine based on selective laser melting forming technology
  • Method for preparing K418 nickel-based high temperature alloy charging turbine based on selective laser melting forming technology

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Embodiment 1

[0027] 1. Select the spherical K418 nickel-based superalloy powder with good powder fluidity and chemical composition that meets the requirements of the national standard as the raw material for laser selective melting and forming. Its specific composition is C: 0.08~0.16wt%, Cr: 11.50~13.50wt%, Mo: 3.8~4.80wt%, Al: 5.50~6.40wt%, Ti: 0.50~1.00wt%, Fe≤1.00wt%, Nb: 1.80~2.50wt%, B: 0.008~0.020wt%, Zr: 0.060~0.150wt%, Mn≤0.50wt%, Si≤0.50wt%, P≤0.015wt%, S≤0.010wt% and the balance Ni; its particle size distribution is: D10 is 24.57μm, D50 is 36.27μm, D90 is 49.22μm, which meets the requirements of laser selective melting powder particle size distribution; its bulk density is 4.47g / cm 3 , the tap density is 5.12g / cm 3 .

[0028] 2. Construct the model of the K418 turbocharger, import the turbocharger STL parts to the Magics RP interface, check and repair various model errors in the STL file, establish the FS271M virtual printing platform, place the parts, and design the basic sup...

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Abstract

The invention discloses a method for preparing a K418 nickel-based high temperature alloy charging turbine based on a selective laser melting forming technology, and belongs to the technical field ofnickel-based high temperature alloy laser additive manufacturing. The method for preparing the K418 nickel-based high temperature alloy charging turbine based on the selective laser melting forming technology solves the problems of many defects, high cost, long period and the like of a traditional casting process in the development stage of the charging turbine. According to the method, firstly, ato-be-formed material is pretreated, then proper forming powder is selected, a model of the K418 charging turbine is constructed, a program file before forming and machining process parameter settingare prepared and imported into SML equipment, under the argon atmosphere, the SML equipment conducts selective melting on the forming powder material on a workbench according to a scanning path and process parameters in a program, and then according to the set layer thickness, the workbench is lowered by one layer thickness, then the powder is laid, the forming powder continues to be subjected toselective melting, the action is repeated, and the charging turbine is formed through step-by-step stacking. By means of the method, the buckling deformation risk of a charging turbine blade is reduced, and part defects caused by stress shrinkage are avoided.

Description

technical field [0001] The invention relates to a method for preparing a K418 nickel-based superalloy turbocharger based on laser selective melting and forming technology, and belongs to the technical field of laser additive manufacturing of nickel-based superalloys. Background technique [0002] Compared with traditional mechanical processing methods, laser selective melting technology (SLM) has a strong "design-forming" rapid response capability, low processing limitations of complex structures, and high material utilization. It has great advantages in processing cycle control and cost control, and is very suitable for the rapid development of small batches, complex structures, and difficult-to-process materials. [0003] The turbocharger is a core component of a high-performance engine. It has advantages in increasing engine power per liter, improving engine emissions, improving fuel economy, and reducing fuel consumption. The huge market demand makes the design unit face...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/47B22F10/64B22F10/66B22F5/04C22C19/05B33Y10/00B33Y80/00
CPCB22F5/04B22F3/24C22C19/056B33Y10/00B33Y80/00B22F2003/248B22F2003/247
Inventor 刘邦涛陈卓田操李浩张鑫浩
Owner AEROSPACE HIWING HARBIN TITANIUM IND
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