Chemical milling liquid for beryllium material surface chemical milling treatment, and chemical milling treatment method

A processing method and a technology of chemical milling fluid, which are applied in the field of chemical milling fluid for surface chemical milling treatment of beryllium materials and the milling treatment method in the field of surface chemical milling treatment of beryllium materials, which can solve the problems that the corrosion process is difficult to control, the surface is not bright enough, and the size of the workpiece is difficult to control. , to achieve the effect of no corrosion pits, bright and beautiful surface

Inactive Publication Date: 2015-04-08
西北稀有金属材料研究院宁夏有限公司
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  • Abstract
  • Description
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Problems solved by technology

However, in this method, the corrosion pits on the surface of the beryllium material are obvious after the corrosion, the surface...

Method used

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Embodiment Construction

[0014] There is a piece of powder metallurgical beryllium workpiece produced by the hot pressing process. Its final size is required to be (50±0.1)×(10±0.1)×(8+0.1)mm. It is required to remove the surface machining damage layer, and the surface is bright and non-corrosive Potholes. The two faces of the 10×50 workpiece are processed by a milling machine, and the surface finish is Ra0.8, with obvious knife marks. There are no special requirements for the other 4 faces. After research, it was found that after processing by a milling machine, a machined layer of about 0.1 mm was produced.

[0015] The chemical milling method for the above workpiece is as follows:

[0016] Sample cleaning: wipe the surface of the sample with alcohol and gauze to remove oil and other pollution on the surface.

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Abstract

The invention relates to a chemical milling liquid for beryllium material surface chemical milling treatment. The chemical milling liquid is characterized by being composed of a class-A chemical milling liquid and a class-B chemical milling liquid, wherein the class-A chemical milling liquid is composed of the following ingredients: 200ml of purified water, 3.6g of sodium nitrate, 12g of ammonia bifluoride and 21.6g of chromium trioxide, and the ratio is the use amount of a single sample per surface area of 13cm<2>; the class-B chemical milling liquid is composed of the following ingredients: 1084ml of phosphoric acid, 100g of chromium trioxide and 60ml of sulphuric acid. According to the chemical milling liquid disclosed by the invention, the surface defects of beryllium materials can be greatly and quantitatively removed and the surfaces are enabled to be bright, beautiful and free from any etch pits by using the prepared chemical milling liquids A and B, and chemically milling according to a certain temperature and etching time. The chemical milling liquid disclosed by the invention is especially suitable for being applied to removal of surface damage layers after machining and brightening treatment of product surfaces, of the beryllium materials produced by a powder metallurgy process.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal production, and in particular relates to a chemical milling liquid for beryllium material surface chemical milling treatment and a milling treatment method for beryllium material surface chemical milling treatment method. Background technique [0002] Beryllium is usually used in the instrument industry or atomic energy industry that requires high precision. This requires that the beryllium material has a high surface quality and cannot have obvious processing damage, such as microcracks, twin layers, processing knife lines, damage caused by wire cutting electric sparks, etc. If these defects exist, it will reduce it. Mechanical properties, welding stability or other properties. Therefore, it is usually necessary to remove the damaged layer on the surface of the beryllium material before it is officially used; or to avoid the occurrence of processing damage through very precise processin...

Claims

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Application Information

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IPC IPC(8): C23F1/30C23F1/14
Inventor 张健康贾丽王文伟王东新吕一格李美岁
Owner 西北稀有金属材料研究院宁夏有限公司
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