SU870510A1 - Method of galvanoplastic making of articles - Google Patents

Description

one

The invention relates to electroplating, namely, to electroforming of forming elements, and can be applied in instrument engineering, mechanical engineering and other industries.

Methods of galvanoplastic fabrication of forming elements by electrodeposition of nickel or nickel-cobalt alloy from various fl electrolytes are known. However, forming elements with a nickel working surface are much more worn than nickel-cobalt alloy.

Closest to the invention is a galvanoplastic process involving the electroplating of a nickel-alloy. cobalt from sulphamate electrolyte with soluble anodes from an alloy of nickel and cobalt.

The lack of galvanoplastic manufacture of products from electrolytes based on nickel-cobalt alloy with a solution

The colmia nickel-cobalt anodes make it possible that the cobalt content remains constant throughout the entire metal layer formed from Ni-Co alloy, which leads to cracked products.

The aim of the invention is to reduce the cracking of products by providing a gradual decrease in the content of kx) balt in the alloy through the thickness of the deposited metal.

Delivered by the fact that in electroplating the manufacture of men, mainly forming elements, the process of electroplating a Ni-Co alloy from sulphamate electrolyte with soluble anodes with a predominant ratio of nickel and cobalt salts from 8 to 14 is carried out at a ratio of electrolyte volume (in dm) to the surface to be coated (in dm) is from 1.7 to 2 and using only soluble nickel anodes. This process method ensures the deposition of a primary layer of a certain

composition, followed by its depletion of cobalt. In practice, the composition of the alloy is stable in thickness to 0.2 mm, which is quite sufficient for the formative elements. Due to the smooth reduction of the Co content in the alloy, the plasticity of the galvanic deposit is gradually improved, which, in turn, prevents its cracking under the influence of internal loads.

Example 1. An electrophore process: movasha of a Ni-Co alloy is carried out in a sulfate electrolyte of the following composition, g / l:

Sulfamic acid nickel 49O Cobalt sulfamic acid 42 Nickel dichloride5

Bourne acid 35

Sodium lauryl sulfate Oh 5

Working surface of model O, 8 dm. Five models are hung on the swing barbell. The electrolysis is carried out at a temperature of 30 + 2 ° C and E-4.5. The raft ") is the current at a load of 4 A / dm. The volume of electrolyte is 7.5 dm, which corresponds to a ratio of 1.7. Nickel anodes. At the same time, 9 witnesses are loaded into the bath with a working surface of 0.05 dm each, 8 witnesses are used to periodically determine the hardness of the alloy, one witness, or the determination of the alloy composition.

PRI mme R 2. The electrolyte volume is 8.2 dm, which corresponds to a ratio of 1.85. The electro-deposition process is carried out analogously to example 1.

Example The electrolyte volume is 8.9 dm, which corresponds to the ratio

2. The electroforming procedure is carried out analogously to example 1.

After deposition of the alloy layer, copper is increased to 5 mm, then the extended elements are separated from the models and mechanically processed. The properties of the obtained coatings are shown in the table.

As can be seen from the table data, in carrying out the invention the maximum hardness of the working layer is ensured.

alloy. During the deposition of O, 1 mm alloy, its composition is depleted in Co only by 2%. As the alloy thickness increases, the cobalt content in it gradually decreases smoothly.

Manufactured parts had no cracks and the yield of parts was 1OO%. The yield of products obtained by the known method with the content of cobalt in the alloy Cf 35% is 60-7 O%

cracking surface forming elements

Due to the fact that according to the I9-invention, the consumption of cobalt is much less when it is used in industrial economic effect with only 1 kg of inserts being 21 rubles, with 3frcM simplifying the process technology will give an additional reduction in labor costs by 1-15%.

Claims (2)

The invention The method of galvanoppastic pags of products, mainly form-building elements, is deposited on a matrix of a nickel-cobalt sulphamate electrolyte alloy with soluble anodes with a predominant ratio of nickel and cobalt salts from 8 to 14, which is going to be going to be in a 22-year-old pattern, with a predominant ratio of nickel and cobalt salts of 8 to 14, with a predominant ratio of nickel and cobalt salts from 8 to 14, with a predominant ratio of nickel and cobalt salts of 8 to 14, with a predominant ratio of nickel and cobalt salts of 8 to 14, with a predominant ratio of nickel and cobalt salts of 8 to 14, with a predominant ratio of the concentration of nickel and cobalt salts of 8 to 14. cobalt nickel alloy is carried out with soluble nickel anodes with cooi 87 0 carrying the volume of electrolyte to the surface to be coated from 1.7 to 2. Source nicknames of information taken into account in the examination 1. Shulpin G. P., and others. Production of flat, three-dimensional and long-length parts by electroforming. Reviews on electronic engineering, 1978, p. 25-27. 2. Schwate H.O., Nicke6 und NickeE / / Kobatt -Qatvaho ormun QUS / em Rowletitiierten Suetamat-teectroevbew, tud-Aiur-I 1973, 95, No. 34, 7O3-7O6 (prototype).