Abrasive particle abrasion pretreatment method for preparing compact passivation film on stainless steel surface

A technology of abrasive wear and stainless steel, applied in the direction of surface polishing machine tools, abrasives, manufacturing tools, etc., can solve problems affecting the integrity of the surface passivation film, secondary scratches, surface wear, etc., to achieve good processing sharpness, Prevents scratches and improves corrosion resistance

Active Publication Date: 2016-05-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For softer metals such as stainless steel, the side effects of high-hardness abrasives are a large amount of wear and secondary scratches on the surface. At the same time, high-hardness abrasives will be randomly embedded on the surface of stainless steel, affecting the integrity of the surface passivation film.

Method used

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  • Abrasive particle abrasion pretreatment method for preparing compact passivation film on stainless steel surface
  • Abrasive particle abrasion pretreatment method for preparing compact passivation film on stainless steel surface
  • Abrasive particle abrasion pretreatment method for preparing compact passivation film on stainless steel surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: AlCuFe Quasicrystalline Abrasive Wear Pretreatment

[0019] Step 1. Preparation of Alloy

[0020] According to Al 62 Cu 25.5 Fe 12.5 The atomic percentage is used for batching, and the raw materials are placed in a water-cooled copper mold for repeated melting by a non-consumable arc to prepare an alloy ingot with a uniform composition;

[0021] Step 2, preparation of quasicrystals with a purity greater than 50%

[0022] The alloy ingot in step 1 was annealed in vacuum at 800°C for 8 hours, and then air-cooled to obtain a high-purity icosahedral quasicrystalline single-phase alloy. The quasicrystalline characteristic peak and its quasicrystalline phase content were determined to be greater than 75% by X-ray diffraction testing technology;

[0023] Step 3. Flour making

[0024] Put the high-purity quasi-crystalline ingot in step 2 into a planetary ball mill, under the protection of argon, set the speed at 250r / min, ball mill for 8 hours, and then sieve wi...

Embodiment 2

[0036] Example 2: AlCuCo Quasicrystalline Abrasive Wear Pretreatment

[0037] Step 1. Preparation of Alloy

[0038] According to Al 65 Cu 20 co 15The atomic percentage is used for batching, and the raw materials are placed in a water-cooled copper mold for repeated melting by a non-consumable arc to prepare an alloy ingot with a uniform composition;

[0039] Step 2, preparation of quasicrystals with a purity greater than 50%

[0040] The alloy ingot in step 1 was annealed in vacuum at 850°C for 12 hours, and then air-cooled to obtain a high-purity icosahedral quasicrystalline single-phase alloy. The quasicrystalline characteristic peak and its quasicrystalline phase content were determined to be greater than 90% by X-ray diffraction testing technology;

[0041] Step 3. Flour making

[0042] Put the high-purity quasi-crystalline ingot in step 2 into a planetary ball mill, under the protection of argon, set the speed at 350r / min, ball mill for 18 hours, and then sieve with ...

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Abstract

The invention discloses an abrasive particle abrasion pretreatment method for preparing a compact passivation film on a stainless steel surface, and belongs to the technical field of stainless steel surface treatment. The abrasive particles used by the pretreatment method comprise quasicrystal and a similar phase (the content is greater than 50%); the Vickers hardness of the abrasive particles is greater than or equal to 5GPa; and the hardness-elasticity ratio is 0.04-0.1. Finishing pretreatment is carried out on the stainless steel surface by an abrasive; stainless steel finishing and fine machining and surface activation can be simultaneously achieved; and quasicrystal abrasive particles have high hardness-elasticity ratio, self-sharpening property and non-sticky performance, have good processing sharpness on the stainless steel surface and can effectively avoid a lot of scratches on a workpiece surface, and are not easily adhered to or embedded into the workpiece surface. The compact and intact passivation film can be obtained by the pretreatment method combined with an existing passivation film preparation technology; the anti-corrosion capability of the stainless steel is improved; the technology is simple; the effect is obvious; resources are saved; and the abrasive particle abrasion pretreatment method can be widely applied.

Description

technical field [0001] The invention relates to an abrasive wear pretreatment method for preparing a dense passivation film on the surface of stainless steel, belonging to the technical field of stainless steel surface treatment. technical background [0002] Stainless steel is an important industrial material with excellent mechanical strength and good mechanical properties. With the continuous development of the industrial field, the use environment of stainless steel parts is becoming more and more harsh. For example, the use of stainless steel materials under harsh service conditions such as high-temperature and high-pressure nuclear power environments and seawater desalination environments with high concentrations of chloride ions requires high corrosion resistance. The main factors affecting the corrosion resistance of stainless steel include surface roughness, cleanliness, and the quality of the passive film. At present, chemical treatment or electrochemical treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/78B24C11/00B24B29/00
CPCB24B29/00B24C11/00C23C22/78
Inventor 陈永君董闯羌建兵
Owner DALIAN UNIV OF TECH
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