Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for removing powder particles in inner cavity of 06Cr19Ni10 additive manufacturing thin-wall sandwich structure

A 06cr19ni10, 1.06cr19ni10 technology, applied in the field of 06Cr19Ni10 additive manufacturing thin-walled sandwich structure cavity powder particle removal field, can solve the problem of difficult to remove powder particles from thin-walled sandwich structure cavity, difficult to completely remove powder particles, grinding The problem of difficult particles, etc., achieves the effect of stable process, good reproducibility, low cost and easy control.

Active Publication Date: 2021-06-11
XIAN SPACE ENGINE CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for complex structures such as thin-walled interlayers and narrow flow channels, it is difficult for the abrasive flow to completely remove the powder particles remaining in the dead corners of the inner cavity, and the grinding particles are easy to accumulate in the dead corners, which cannot be completely eliminated, and there is a risk of introducing redundant substances
At the same time, if the pressure of the abrasive flow is too small, it is difficult for the grinding particles to pass through the complex inner cavity and narrow flow channel smoothly, but if the pressure is too high, it may cause local deformation of thin-walled parts
[0004] After reviewing a large amount of data and consulting with many companies, using simulation parts to carry out verification tests, it is difficult to completely remove the powder particles in the cavity of the thin-walled sandwich structure by existing conventional mechanical methods

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
  • Method for removing powder particles in inner cavity of 06Cr19Ni10 additive manufacturing thin-wall sandwich structure
  • Method for removing powder particles in inner cavity of 06Cr19Ni10 additive manufacturing thin-wall sandwich structure
  • Method for removing powder particles in inner cavity of 06Cr19Ni10 additive manufacturing thin-wall sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] After degreasing and activating the additively manufactured 06Cr19Ni10 body, the HCl content is 35g / L, HNO 3 The content is 140g / L, FeCl 3 The content is 150g / L, Fe(NO3) 3 The content is 220g / L, the content of hexamethylenetetramine is 2g / L, the temperature of the solution is 40°C, and the inner cavity powder particles are chemically treated for 2 minutes under the pressure of 0.1MPa. After the chemical treatment, the inner cavity of the part is rinsed with a water gun.

[0030] After the above-mentioned additive manufacturing of 06Cr19Ni10 body, an endoscope is used to inspect the inner cavity of the interlayer. There are no adhered metal powder particles on the inner surface. In addition, there is no processing stress in the chemical reaction, and the working pressure during the processing is much lower than In the actual working condition of the product, the thin-wall interlayer has no deformation through CT inspection, and the method of the present invention is rel...

Embodiment 2

[0032] After degreasing and activating the additively manufactured 06Cr19Ni10 body, the HCl content is 45g / L, HNO 3 The content is 170g / L, FeCl 3 The content is 200g / L, Fe(NO3) 3 The content is 260g / L, the content of hexamethylenetetramine is 5g / L, the temperature of the solution is 50°C, and the inner cavity powder particles are chemically treated for 4 minutes under the pressure of 0.3MPa. After the chemical treatment, the inner cavity of the part is rinsed with a water gun.

[0033] After the above-mentioned additive manufacturing of 06Cr19Ni10 body, an endoscope is used to inspect the inner cavity of the interlayer. There are no adhered metal powder particles on the inner surface. In addition, there is no processing stress in the chemical reaction, and the working pressure during the processing is much lower than In the actual working condition of the product, the thin-wall interlayer has no deformation through CT inspection, and the method of the present invention is rel...

Embodiment 3

[0035] After degreasing and activating the additively manufactured 06Cr19Ni10 body, the HCl content is 35g / L, HNO 3 The content is 170g / L, FeCl 3 The content is 150g / L, Fe(NO3) 3 The content is 220g / L, the content of hexamethylenetetramine is 2g / L, the temperature of the solution is 40°C, and the inner cavity powder particles are chemically treated for 2 minutes under the pressure of 0.1MPa. After the chemical treatment, the inner cavity of the part is rinsed with a water gun.

[0036] After the above-mentioned additive manufacturing of 06Cr19Ni10 body, an endoscope is used to inspect the inner cavity of the interlayer. There are no adhered metal powder particles on the inner surface. In addition, there is no processing stress in the chemical reaction, and the working pressure during the processing is much lower than In the actual working condition of the product, the thin-wall interlayer has no deformation through CT inspection, and the method of the present invention is rel...

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

No PUM Login to View More

Abstract

The invention provides a method for removing semi-molten powder particles on the surface of an additive manufacturing product. The removing method belongs to a chemical treatment method, bonded metal powder particles are dissolved or stripped by means of a chemical reaction, meanwhile, an acidic solution is injected into an inner cavity of a sandwich layer under certain pressure by utilizing the fluid mechanics principle, the product structure limitation is overcome, the solution can infiltrate the inner cavity of a part without dead angles in the whole process, the powder particles bonded in the inner cavity of the thin-wall sandwich layer can be thoroughly removed without dead angles, the risk that the powder particles fall off to form redundant substances is eliminated, and meanwhile, new redundant substances cannot be introduced. In addition, no machining stress exists in chemical treatment, and the defects of deformation and the like of the thin-wall sandwich part cannot be caused.

Description

technical field [0001] The invention belongs to the technical field of post-processing of additive manufacturing, and specifically relates to a process method for removing semi-melted metal powder particles on the inner cavity surface of a thin-walled sandwich structure by additive manufacturing of 06Cr19Ni10 material. Under working conditions, the risk of powder particles falling off to form redundant substances, while significantly reducing surface roughness, improving product process performance. Background technique [0002] In order to meet the requirements of small batches, light weight and integration of liquid rocket engines, additive manufacturing technology is playing an increasingly important role in the development of aerospace liquid power models. However, the problems of "spheroidization effect" and "powder adhesion" unique to metal additive manufacturing technology lead to excessively high surface roughness, which significantly affects the performance of hydra...

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): C23G1/19B22F3/24B33Y40/20C23F1/28C23F3/06
CPCC23G1/19C23F1/28C23F3/06B22F3/24B33Y40/20B22F2003/241Y02P10/25
Inventor 叶晖许维超薛露平王云权琳琳卢勋超樊少忠
Owner XIAN SPACE ENGINE CO LTD