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Solution and method for chemical machining of ei768 stainless steel workpiece

A technology for chemical processing and stainless steel, which is applied in the field of chemical processing solutions for эи768 stainless steel, which can solve the problems of difficult processing and easy generation of cutting stress.

Active Publication Date: 2012-12-05
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the difficulty of machining in the prior art, and for parts with thin walls and complex shapes, cutting stress is easily generated, the present invention proposes a solution and method for chemical machining of эи768 stainless steel workpieces

Method used

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  • Solution and method for chemical machining of ei768 stainless steel workpiece
  • Solution and method for chemical machining of ei768 stainless steel workpiece
  • Solution and method for chemical machining of ei768 stainless steel workpiece

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Embodiment 1

[0033] This embodiment is a solution for chemical processing of эи768 stainless steel workpieces. The solution includes hydrochloric acid, nitric acid, ferric chloride and water, wherein: hydrochloric acid is industrial pure grade, specific gravity d=1.18; nitric acid is industrial pure grade, specific gravity d=1.41; ferric chloride is industrial pure powder . The volume ratio of hydrochloric acid is 132ml / L, the volume ratio of nitric acid is 115ml / L, the weight volume ratio of ferric trichloride is 445g / L, all the other are water.

[0034] Present embodiment also proposes a kind of method utilizing the solution processing of described эи768 stainless steel workpiece chemical processing эи768 stainless steel plate-shaped workpiece, and its specific process is:

[0035] Step 1, prepare the solution. Prepare one liter of solution in proportion: wherein hydrochloric acid 132ml / L, nitric acid 115ml / L, iron trichloride 445g / L, balance is water. A prepared solution is obtained....

Embodiment 2

[0047] This embodiment is a solution for chemical processing of эи768 stainless steel workpieces. The solution includes hydrochloric acid, nitric acid, ferric chloride and water, wherein: hydrochloric acid is industrial pure grade, specific gravity d=1.18; nitric acid is industrial pure grade, specific gravity d=1.41; ferric chloride is industrial pure powder . The volume ratio of hydrochloric acid is 135ml / L, the volume ratio of nitric acid is 118ml / L, the weight-volume ratio of ferric chloride is 448g / L, and all the other are water.

[0048] Present embodiment also proposes a kind of method that utilizes the solution processing of described эи768 stainless steel workpiece chemical processing эи768 stainless steel annular workpiece, and its specific process is:

[0049] Step 1, prepare the solution. Prepare one liter of solution in proportion: wherein hydrochloric acid 135ml / L, nitric acid 118ml / L, iron trichloride 448g / L, and balance is water. A prepared solution is obtai...

Embodiment 3

[0061] This embodiment is a solution for chemical processing of эи768 stainless steel workpieces. The solution includes hydrochloric acid, nitric acid, ferric chloride and water, wherein: hydrochloric acid is industrial pure grade, specific gravity d=1.18; nitric acid is industrial pure grade, specific gravity d=1.41; ferric chloride is industrial pure powder . The volume ratio of hydrochloric acid is 138ml / L, the volume ratio of nitric acid is 121ml / L, the weight-volume ratio of ferric chloride is 450g / L, and all the other are water.

[0062] This embodiment also proposes a method for processing the эи768 stainless steel stage 1 compressor blade using the solution of the эи768 stainless steel workpiece chemically processed, and its specific process is:

[0063] Step 1, prepare the solution. Prepare one liter of solution in proportion: wherein hydrochloric acid 138ml / L, nitric acid 121ml / L, ferric chloride 450g / L, and the balance is water. A prepared solution is obtained. ...

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Abstract

The invention discloses a solution and a method for the chemical machining of a ei768 stainless steel workpiece. The solution comprises hydrochloric acid with a volume ratio of 132 ml / L to 142 ml / L, nitric acid with a volume ratio of 115 ml / L to 125 ml / L, ferric trichloride with a weight-to-volume ratio of 445 g / L to 453 g / L, and the balance of water. In a machining process, a corrosion machining speed on the surface of the workpiece within a unit time is first determined through a sample, and the chemical machining time of the workpiece is determined according to the obtained chemical machining speed of the sample and the surface removal amount of the workpiece to be machined. The dimensional accuracy and the surface roughness of the workpiece machined through the solution and the method both can reach an ideal level; moreover, cutting stress cannot be generated; and the deformation does not exist. Through metallographic inspection, the solution and the method cannot cause intercrystalline corrosion to ei768 stainless steel, and the abnormality of a material tissue is not discovered.

Description

technical field [0001] The invention relates to the field of chemical processing of materials, in particular to a chemical processing solution and method for эи768 stainless steel. Background technique [0002] эи768 stainless steel is a high-corrosion-resistant martensitic heat-strength stainless steel, which belongs to the low-carbon high-chromium type and has good corrosion resistance. It can be used for compressor blades working under marine climate conditions below 550°C. Since the steel contains a certain amount of cobalt element, most of the cobalt element is dissolved in austenite and ferrite to strengthen the matrix of the steel, so that the thermal strength of the steel is significantly improved. In order to remove the size of the material for precision forging compressor blades, it is necessary to carry out full-scale chemical machining after precision forging to meet the design requirements. After retrieving patent documents at home and abroad, no chemical proce...

Claims

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Application Information

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IPC IPC(8): C23F1/28C23F1/04
Inventor 陈晓彦胡婷婷
Owner AECC AVIATION POWER CO LTD
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