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Ferro-nickel alloy electroplating process for copper plate working surface of continuously casting crystallizer

A continuous casting mold, continuous casting crystallization technology, applied in genetic engineering, chemical instruments and methods, sugar derivatives, etc., can solve the problems of high hardness of the coating, reduce the number of repairs, and the coating is prone to hot cracks, and achieve long life. , Improve high temperature mechanical properties, improve the effect of coating quality

Inactive Publication Date: 2004-06-16
XIXIA LONGCHENG SPECIAL MATERIALS CO LTD
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  • Description
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Problems solved by technology

[0004] However, there are still some defects in the current application status, which need to be further improved, that is, the coating has high hardness, but poor toughness, and the difference in thermal expansion coefficient between the coating and the base metal. Causes the base metal to produce deep fine cracks at the same time, resulting in a large amount of cutting when the base metal is repaired, thereby reducing the number of repairs, and the overall service life is not high; the high temperature toughness is poor, and the coating is brittle and easy to peel off and fall off due to long-term high temperature action , and the phenomenon of bagging affect the amount of steel; under the condition of higher pulling speed, the performance needs to be further improved

Method used

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Embodiment Construction

[0039] The process of the present invention is to strengthen the pre-plating treatment and enhance the bonding force of the coating, that is, acetone cleaning, sand blasting, electrolytic degreasing, nitric acid and hydrochloric acid spray activation; the electroplating adopts a conventional sulfate system to stabilize the plating solution and reduce the stress of the coating, and Adopted stabilizer and softener, stabilizer is made into 1 liter of aqueous solution with citric acid, glucose, ascorbic acid by the ratio of 15: 8: 100 grams; Softener is formulated with 1 liter of aqueous solution with formaldehyde and saccharin by 15: 60 grams; The anode material is adjusted to sulfur-containing active nickel buckle, the tooling and cathodic protection device for copper plate electroplating are stainless steel and non-metallic material assemblies.

[0040]The process conditions of the present invention are as follows: after machining, the base metal of the copper plate is firstly c...

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Abstract

The present invention discloses a ferro-nickel alloy electroplating process for copper plate working surface of continuously casting mould. The process is characterized by the intensive pre-electroplating treatment including chemical washing, sandblast to roughen, electrolytic deoiling, and nitric acid and hydrochloric acid spraying activation; and special electroplating fixture. In the process with common sulfate electrolyte system, improved anode material and additives L981 and L992 are used. The process can form coating with strong binding force with the matrix, high hardness, high high-temperature toughness, high abrasion resistance and thickness of upto 3 mm and the product is suitable for use in steel works.

Description

Technical field: [0001] The invention relates to a nickel-iron alloy electroplating process on the copper plate working surface of a slab, a bloom, and a special-shaped billet continuous casting crystallizer. Background technique: [0002] Electroplated nickel-iron alloy on the surface of mold copper plate is a relatively common coating material used by foreign steel mills, and it has also been developed and utilized in China in recent years; its characteristics are: the hardness of the coating can be adjusted within a wide range; the tensile strength and hardness are 2 times that of nickel coating more than 10 times, strong wear resistance, high steel passing capacity; strong bonding force between the coating and the base metal, not easy to peel off; thick coating can be plated; it is a single coating, and there will be no potential corrosion between coatings; therefore, in the current slab It is widely used with bloom continuous casting and has good effect. [0003] ...

Claims

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Application Information

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IPC IPC(8): C07H21/00C07K14/00C07K14/435C07K16/00C07K16/18C12N15/10C12N15/12C12N15/63C25D3/12
Inventor 黄祥云曹国超朱新文张立新朱书成陈元奎
Owner XIXIA LONGCHENG SPECIAL MATERIALS CO LTD
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