Surface treatment solution and surface treatment device for SLM (selective laser melting) modeled stainless steel parts

A surface treatment liquid, stainless steel technology, applied in the direction of process efficiency improvement, additive manufacturing, energy efficiency improvement, etc., can solve the problems of inability to process parts, high labor intensity, high cost, and achieve easy assembly, simple configuration, and bright surface. Effect

Active Publication Date: 2019-01-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of high labor intensity, low efficiency, high cost and inability to process complex parts in the polishing method, and to provide a stainless steel for SLM forming that can efficiently polish the surface of the sample and improve the surface cleanliness and brightness of the sample. Surface treatment liquid and surface treatment device for parts

Method used

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  • Surface treatment solution and surface treatment device for SLM (selective laser melting) modeled stainless steel parts
  • Surface treatment solution and surface treatment device for SLM (selective laser melting) modeled stainless steel parts
  • Surface treatment solution and surface treatment device for SLM (selective laser melting) modeled stainless steel parts

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Experimental program
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Effect test

Embodiment 1

[0060] A surface treatment solution for SLM formed stainless steel parts, including alkaline solution, pickling solution and chemical polishing solution:

[0061] The mass-number ratio of potassium hydroxide, oxidizing agent and sodium chloride in the alkaline solution is 14:12:1.

[0062] The oxidizing agent is composed of sodium nitrate and potassium permanganate, and the mass-number ratio of sodium nitrate and potassium permanganate is 0.8:1.

[0063] The pickling liquid is composed of sodium chloride, hydrochloric acid and sulfuric acid, and the mass-number ratio of sodium chloride, hydrochloric acid and sulfuric acid is 12:4:1.

[0064] Chemical polishing liquid is made up of colloidal silicon dioxide, zirconia, 68wt% nitric acid, 36wt% hydrochloric acid, 85%wt phosphoric acid, 98%wt sulfuric acid, viscosity regulator, corrosion inhibitor, brightener, fog suppressant and water; The mass parts ratio of silicon oxide, zirconia, 68wt% nitric acid, 36wt% hydrochloric acid, 8...

Embodiment 2

[0088] Embodiment 2 comprises the solution preparation step of embodiment 1, surface treatment device and experimental process, and the surface treatment liquid of embodiment 2 comprises alkali boiling liquid, pickling liquid and chemical polishing liquid:

[0089] The mass-number ratio of potassium hydroxide, oxidizing agent and sodium chloride in the alkaline solution is 16:15:1.

[0090]The oxidizing agent is composed of sodium nitrate and potassium permanganate, and the mass-number ratio of sodium nitrate and potassium permanganate is 0.7:1.

[0091] The pickling liquid is made up of sodium chloride, hydrochloric acid and sulfuric acid, and the mass-number ratio of sodium chloride, hydrochloric acid, sulfuric acid is 5: 4: 1;

[0092] The mass parts ratio of colloidal silicon dioxide, zirconia, 68wt% nitric acid, 36wt% hydrochloric acid, 85%wt phosphoric acid, 98%wt sulfuric acid, viscosity regulator, corrosion inhibitor, brightener, fog suppressant and water is as follows...

Embodiment 3

[0104] Embodiment 3 comprises the solution preparation step of embodiment 1, surface treatment device and experimental process, and the surface treatment liquid of embodiment 3 comprises alkali boiling liquid, pickling liquid and chemical polishing liquid:

[0105] The mass-number ratio of potassium hydroxide, oxidizing agent and sodium chloride in the alkaline solution is 18:10:1.

[0106] The oxidizing agent is composed of sodium nitrate and potassium permanganate, and the mass-number ratio of sodium nitrate and potassium permanganate is 0.5:1.

[0107] The mass-number ratio of sodium chloride, hydrochloric acid, and sulfuric acid in the pickling solution is 12:5:1;

[0108] Mass parts of colloidal silicon dioxide, zirconia, 68wt% nitric acid, 36wt% hydrochloric acid, 85%wt phosphoric acid, 98%wt sulfuric acid, viscosity modifier, corrosion inhibitor, brightener, fog suppressor and water in chemical polishing liquid For example: 2:8:4.5:5:3.5:2:1:0.25:0.15:0.005:15.

[010...

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Abstract

The invention discloses a surface treatment solution and a surface treatment device for SLM (selective laser melting) molded stainless steel parts. The surface treatment solution comprises an alkali boiling solution, a pickling solution and a chemical polishing solution; the alkali boiling solution comprises potassium hydroxide, oxidizing agents and sodium chloride; the pickling solution comprisessodium chloride, hydrochloric acid and sulfuric acid; the chemical polishing solution comprises colloidal silicon dioxide, zirconium oxide, 68wt% of nitric acid, 36wt% of hydrochloric acid, 85wt% ofphosphoric acid, 98wt% of sulfuric acid, a viscosity modifier, an inhibiter, a brightener, a fog inhibitor and a water; the surface treatment solution has the advantages of reducing surface roughnessof the SLM molded stainless steel parts and improving surface finish degree and luminance greatly.

Description

technical field [0001] The invention belongs to the field of SLM forming (selective laser melting forming) in metal 3D printing technology, and in particular relates to a surface treatment liquid for SLM forming stainless steel parts that can efficiently polish the surface of a sample and improve the surface finish and brightness of the sample and surface treatment devices. Background technique [0002] Metal 3D printing technology, that is, additive manufacturing technology, was developed in response to the application needs of aerospace, nuclear energy and medical fields in recent years. At present, SLM forming (selected area laser melting forming) is one of the most important forming methods in metal 3D printing technology. [0003] The principle of SLM forming is to rapidly melt the metal powder through the laser beam, and then rapidly cool it, so that the tiny metal molten pools are fused with each other and solidified into a line or surface metal layer, so that the la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/06C23G1/08C23G1/19B22F3/105B22F3/24B33Y40/00
CPCC23F3/06C23G1/081C23G1/19B22F3/24B33Y40/00B22F10/00B22F10/28Y02P10/25B22F10/20
Inventor 张林吕莎莎周成双
Owner ZHEJIANG UNIV OF TECH
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