Selective laser melting forming process for GH4099 nickel-based alloy element

A laser selective melting and forming process technology, applied in the direction of additive processing, additive manufacturing, etc., can solve the problems of long process cycle, low processing efficiency, high degree of alloying, etc., to improve comprehensive mechanical properties, ensure forming quality, and expand applications range effect

Active Publication Date: 2021-04-02
BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP +1
View PDF10 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The chemical composition elements of GH4099 nickel-based alloy include tungsten, molybdenum, rhenium, titanium, niobium, tantalum, manganese, aluminum, vanadium and many other refractory metals, with high degree of alloying, poor formability and low processing efficiency in traditional processing methods
The casting performance of GH4099 high-temperature alloy is extremely poor, and the hot deformation method of forging and rolling is generally used, which has a long process cycle and high cost; in machining, due to the high strength and hardness, the tool wear is serious and the processing efficiency is low.
The limitation of the forming process has hindered the production and application of complex shape structural parts in model products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Selective laser melting forming process for GH4099 nickel-based alloy element
  • Selective laser melting forming process for GH4099 nickel-based alloy element
  • Selective laser melting forming process for GH4099 nickel-based alloy element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A GH4099 superalloy laser selective melting forming method, the steps of the method comprising:

[0056] (1) Using GH4099 superalloy rods for gas atomization powder making to obtain metal powders with particle sizes ranging from 15 μm to 53 μm;

[0057] (2) using the powder obtained in step (1) to carry out selective laser melting and forming to obtain a GH4099 nickel-based alloy member whose shape meets the requirements;

[0058] (3) Perform solution aging treatment on the GH4099 nickel-based alloy member whose shape meets the requirements obtained in step (2), to obtain the GH4099 nickel-based alloy member whose shape and mechanical properties meet the requirements.

[0059] In the step (1), the GH4099 superalloy rod is used as the raw material, and the gas atomization pulverization method is adopted, the atomization gas is argon, the pressure is 4.5MPa, the superheat of the molten metal is 200°C, and the flow rate of the molten metal is 18Kg per minute , to obtain a...

Embodiment 2

[0064] A GH4099 superalloy laser selective melting forming method. The GH4099 superalloy rod is used for gas atomization powder making, and the metal powder with a particle size range of 15 μm to 53 μm is obtained; the obtained metal powder is used as the raw material, and the process parameters are laser power 305W, spot diameter 0.09mm, scanning speed 1050mm / s, scan lap 0.03mm, powder layer thickness 0.04mm to prepare GH4099 nickel-based alloy components, then place them in an air furnace at 1350°C for 2 hours, cool to room temperature, then place them in an air furnace at 900°C for 10 hours, and then Air cool to room temperature.

[0065] The obtained GH4099 nickel-based alloy components were tested for mechanical properties using the same batch of samples, such as Figure 4 It is a schematic diagram of the metallographic structure (deposited state) of the member prepared by the embodiment 2 of the process of the present invention, Figure 4 a is horizontal organization; ...

Embodiment 3

[0067] A GH4099 superalloy laser selective melting forming method. The GH4099 superalloy rod is used for gas atomization powder making, and the metal powder with a particle size range of 15 μm to 53 μm is obtained; the obtained metal powder is used as the raw material, and the process parameters are laser power 285W, spot diameter 0.09mm, and scanning speed. 960mm / s, lap width 0.3mm, powder layer thickness 0.03mm to prepare GH4099 nickel-based alloy components, then place them in an air furnace at 1400°C for 1.5h, cool to room temperature, and then place them in an air furnace at 800°C for 12h. Then air cool to room temperature.

[0068] The obtained GH4099 nickel-based alloy components are tested for mechanical properties using the same batch of samples. The test methods are GB / T228.1 and GB / T228.2. The test results show that the tensile strength at room temperature reaches 1187MPa-1224MPa, and the yield strength reaches 989MPa ~997MPa, elongation reaches 36.0%~39.7%; 900℃ t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of metal additive manufacturing and high-temperature alloys, and particularly relates to a selective laser melting forming process of a GH4099 nickel-basedalloy element. The preparation method includes the steps that GH4099 nickel-based alloy is prepared into alloy powder, drying treatment is conducted, and powder is obtained; the powder is subjected to selective laser melting forming, and an alloy element is obtained; and the alloy element is subjected to heat treatment, and the GH4099 nickel-based alloy element with the shape and the mechanical property meeting requirements is obtained. According to the selective laser melting forming process of the GH4099 nickel-based alloy element, the raw material powder is molten layer by layer through high-energy laser beams, so that element manufacturing with higher precision and higher complexity is achieved, and rapid manufacturing and direct manufacturing of precise elements are achieved. The forming quality of printed components can be guaranteed, a structure is uniform, and the defects of pores, cracks, unmelted particles and the like are avoided. The comprehensive mechanical property of the high-temperature alloy printed component reaches a forging level, so that the comprehensive mechanical property of the high-temperature alloy element is improved, and the application range is expanded.

Description

technical field [0001] The invention belongs to the technical field of metal additive manufacturing and high-temperature alloys, and in particular relates to a laser selective melting forming process for GH4099 nickel-based alloy components. Background technique [0002] Nickel-based superalloys have excellent oxidation resistance, corrosion resistance, and high temperature resistance, and are widely used in aerospace, shipbuilding, nuclear energy, and chemical industries. They are important materials for manufacturing hot-end components of aerospace power plants. GH4099 nickel-based alloy is a typical precipitation-hardening nickel-based deformed superalloy with high thermal strength. It can be used for a long time at 900°C, and the short-term use temperature can reach 1000°C. The alloy has a stable structure, good cold and hot forming and welding process performance, and is suitable for manufacturing high-temperature plate load-bearing welded structural parts such as aero-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B33Y10/00B33Y70/00C22C19/05
CPCB33Y10/00B33Y70/00C22C19/055
Inventor 许旭鹏钱远宏李志勇
Owner BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap