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Electron beam additive manufacturing method for nickel base alloy structural component

A nickel-based alloy, additive manufacturing technology, applied in the field of electron beam additive manufacturing, can solve the problems of wasting manpower and material costs, cumbersome processes, inability to select more suitable blank components, etc., to achieve high utilization rate and high energy density. Effect

Inactive Publication Date: 2017-09-05
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing method not only has a cumbersome process, but also needs to restart the production if any process goes wrong in the middle, wasting manpower and material costs
Moreover, the composition of the structural blank is fixed, and a more suitable blank composition cannot be selected according to actual needs.

Method used

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  • Electron beam additive manufacturing method for nickel base alloy structural component
  • Electron beam additive manufacturing method for nickel base alloy structural component
  • Electron beam additive manufacturing method for nickel base alloy structural component

Examples

Experimental program
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Embodiment

[0026] (1) Substrate pretreatment

[0027] The substrate of the sample is inconel617 alloy, and the size of the substrate is length × width × height = 100mm × 100mm × 10mm. The substrate is ground and polished with sandpaper to make the surface roughness of the material Ra<10μm, and then washed with 5% to 10% hydrochloric acid About 30 minutes, then wash with clean water, then put it into a drying oven at 100°C for more than 1 hour, take out the treated nickel-based alloy matrix material and cool it to room temperature naturally for use;

[0028] (2) Powder configuration

[0029] Ni powder, Nb powder, Mo powder, Cr powder, rare earth CeO were prepared by vacuum plasma rotating electrode atomization process 2 Five kinds of powders, each particle size is 0.02-0.15mm, and the optimal particle size is 0.07mm; the above-mentioned powders are as follows in terms of mass percentage: Ni powder: 60%, Nb powder: 10%, Mo powder: 10%, Cr powder: 15% %, rare earth CeO 2 Powder: 5% prepa...

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Abstract

The invention discloses an electron beam additive manufacturing method for a nickel base alloy structural component. The method comprises the steps that under the condition of a vacuum chamber, a nickel base alloy base body is placed in a working table in advance, and the pressure intensity inside the chamber is made to reach 4.8*10<2> Pa; a specially-made powder delivering device is utilized to spray Ni powder, Nb powder, Mo powder, Cr powder and rear earth CeO2 superfine metal powder which are uniformly mixed according to a certain mass compounding ratio into a molten pool through which electron beams are generated, so that an electron beam cladding layer metallurgically bonded with the base body; and then, layer-by-layer electron beam cladding is achieved through a numerical control processing procedure adopted for each layer, so that the three-dimensional metal component is obtained finally. By means of the electron beam additive manufacturing method, the nickel base alloy structural component which has the structural characteristic, namely rapid solidification and is high in performance, fully compact and complex in shape is manufactured. The manufacturing method is low in manufacturing cost, short in manufacturing cycle, high in material utilization rate and stable in performance, the complex component can be manufactured rapidly, and structural strength of the nickel base alloy structural component can be remarkably improved; and structural defects such as pores, cracks and residual stress inside an alloy are reduced.

Description

technical field [0001] The invention relates to the technical field of electron beam additive manufacturing, in particular to an electron beam additive manufacturing method for nickel-based alloy structural parts. Background technique [0002] As a typical process of additive manufacturing technology, electron beam deposition manufacturing technology is a kind of additive manufacturing technology. It uses alloy powder as raw material and is characterized by synchronous powder feeding. It is manufactured by layer-by-layer deposition through electron beam melting / rapid solidification. The "near-net-shape manufacturing" of fully dense, high-performance metal structural parts is completed in one step from the CAD model of the part. Because of its unique technical advantages, it is known as a "transformative" and "shape-controlling / controllable" integrated manufacturing technology, which has broad development prospects in the manufacture of major equipment such as aviation and ae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F7/08B33Y10/00B33Y70/00C22C19/05C22C32/00
CPCC22C19/056C22C32/0026B22F7/08B33Y10/00B33Y70/00B22F10/00B22F10/25B22F10/34B22F10/366B22F10/80Y02P10/25
Inventor 刘海浪张国培黄以平余志彪祁正伟王波
Owner GUILIN UNIV OF ELECTRONIC TECH
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