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Selective laser melting material additive manufacturing IN718 component, system, and heat treatment method and device

A laser selective melting, IN718 technology, applied in the field of metal additive manufacturing, can solve the problems of unstable organizational state, different organizational structure, low component strength and residual stress of components, and achieve the effect of eliminating residual stress and improving corrosion resistance.

Active Publication Date: 2016-12-07
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

Usually, the forming temperature of selective laser melting forming IN718 is above 2000°C, while the ambient substrate temperature is often below 200°C, the liquid phase is instantaneously solidified under high supercooling, the solidification process is non-equilibrium, and the matrix γ is in a supersaturated state. Moreover, the grain size and structure of the edge of the molten pool and the core are different, and the overall structure state is very unstable, resulting in low strength of the IN718 component and a large residual stress inside the component, and the subsequent heat treatment process must be used to improve its structure and performance.

Method used

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  • Selective laser melting material additive manufacturing IN718 component, system, and heat treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The manufacturing system for manufacturing IN718 alloy components in the embodiment of the present invention forms the IN718 alloy components, and the IN718 alloy selective laser melting process parameters are as follows: the laser power is 275W, the spot diameter is 0.10mm, and the scanning speed is 800mm / s. The layer thickness is 0.04mm.

[0042] The manufactured IN718 components are heat treated.

[0043] First place the IN718 component in a vacuum heat treatment furnace, and evacuate the heat treatment furnace to 10 -3 Pa, then raise the temperature to about 600°C at a speed of 10°C / min and keep it for 20 minutes, then continue to raise the temperature to about 950°C at the above speed for 2 hours, then cool the IN718 component to room temperature with the furnace, and the heat treatment process is completed. Then the furnace is evacuated to atmospheric pressure and the workpiece is taken out.

[0044] For the IN718 alloy components treated by the above process, t...

Embodiment 2

[0046] The manufacturing system for manufacturing IN718 alloy components in the embodiment of the present invention forms the IN718 alloy components, and the IN718 alloy selective laser melting process parameters are as follows: the laser power is 800W, the spot diameter is 0.2mm, and the scanning speed is 1400mm / s. The layer thickness is 0.08mm.

[0047] The manufactured IN718 components are heat treated.

[0048] First place the IN718 component in a vacuum heat treatment furnace, and evacuate the heat treatment furnace to 10 -4 Pa, then raise the temperature to about 700°C at a rate of 5°C / min and keep it for 40 minutes, then continue to raise the temperature to about 1050°C and keep it for 4 hours, then cool the IN718 component to room temperature with the furnace, and the heat treatment process is completed. Then the furnace is evacuated to atmospheric pressure and the workpiece is taken out.

[0049] For the IN718 alloy components treated by the above process, the therm...

Embodiment 3

[0051] The manufacturing system for manufacturing IN718 alloy components in the embodiment of the present invention forms the IN718 alloy components, and the IN718 alloy selective laser melting process parameters are as follows: the laser power is 540W, the spot diameter is 0.15mm, and the scanning speed is 1200mm / s. The layer thickness is 0.06 mm.

[0052] The manufactured IN718 components are heat treated.

[0053] First place the IN718 component in a vacuum heat treatment furnace, and evacuate the heat treatment furnace to 5x10 -4 Pa, then raise the temperature to about 650°C at a speed of 7.5°C / min and keep it for 30 minutes, then continue to raise the temperature to about 1000°C and keep it for 3 hours, then cool the IN718 component to room temperature with the furnace, and the heat treatment process is completed. Then the furnace is evacuated to atmospheric pressure and the workpiece is taken out.

[0054] For the IN718 alloy components treated by the above process, th...

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Abstract

The invention relates to a selective laser melting material additive manufacturing IN718 component, a system, and a heat treatment method and device. According to the IN718 component, during selective laser melting molding, the laser power ranges from 275 W to 800 W, the spot diameter ranges from 0.1 mm to 0.2 mm, the scanning speed ranges from 900 mm / s to 1400 mm / s, and the thickness of a powder laying layer ranges from 0.04 mm to 0.08 mm; the heat treatment method comprises the steps that the molded IN718 component is placed in a vacuum heat treatment furnace to be subject to vacuum annealing heat treatment. The heat treatment device comprises the vacuum heat treatment furnace. The system for the selective laser melting material additive manufacturing IN718 component comprises a 3D printer and further comprises the vacuum heat treatment furnace arranged behind the working procedure of the 3D printer. According to the system and the heat treatment method and device, residual stress generated in the printing process of the IN718 alloy component can be removed, a structure is obviously homogenized, corrosion resistance, toughness and the like are well improved, and the requirement of aerospace products for the IN718 alloy structural component can be met.

Description

technical field [0001] The present invention mainly relates to the field of metal additive manufacturing, and in particular to an IN718 component, system, heat treatment method and device for laser selective melting additive manufacturing. Background technique [0002] Nickel-based superalloys have excellent oxidation resistance, corrosion resistance and high temperature resistance, and can be widely used in aero-engine turbine blades, petrochemical industries and ships that require corrosion-resistant key components. In718 nickel-based superalloy is an aging-strengthened nickel-based superalloy, with nickel as the matrix (the content is generally greater than 50%), and has high strength, plasticity and good oxidation resistance in the range of -253°C-650°C , corrosion resistance, welding ability, so it is widely used in aerospace, nuclear energy, petroleum and other fields, and has the reputation of "universal alloy". [0003] The main strengthening element of In718 supera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24C22F1/10B33Y10/00B33Y30/00
CPCC22F1/10B22F3/003B22F3/24B33Y10/00B33Y30/00B22F2003/248B22F2999/00B22F2998/10B22F10/00B22F12/67B22F10/28B22F10/64B22F10/36B22F10/366B22F2201/20Y02P10/25
Inventor 楚瑞坤吴鑫华梅俊发计霞周德敬李龙
Owner 飞而康快速制造科技有限责任公司
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