Hardening parts by chrome plating in manufacture and repair

In the engineering industry, galvanic coatings are widely used to prolong the service life of the machines, which contribute to the increase in the strength of the parts and their resistance to environmental influences, temperature and pressure drops, wear and fretting corrosion. Galvanic coatings h...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-03, Vol.327 (3), p.32008
Main Authors: Astanin, V K, Pukhov, E V, Stekolnikov, Y A, Emtsev, V V, Golikova, O A
Format: Article
Language:English
Subjects:
Agricultural aircraft
Agricultural engineering
Agricultural equipment
Avionics
Chromium plating
Coatings
Component reliability
Corrosion resistance
Corrosive wear
Deposition
Electrolytes
Fretting corrosion
Hardening
Machining
Microhardness
Pressure drop
Production methods
Reliability aspects
Repair
Service life
Thickness
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Summary:In the engineering industry, galvanic coatings are widely used to prolong the service life of the machines, which contribute to the increase in the strength of the parts and their resistance to environmental influences, temperature and pressure drops, wear and fretting corrosion. Galvanic coatings have been widely applied in engineering, including agriculture, aircraft building, mining, construction, and electronics. The article focuses on the manufacturing methods of new agricultural machinery parts and the repair techniques of worn parts by chrome plating. The main attention is paid to the unstable methods of chromium deposition (in pulsed and reversing modes) in low-concentration electrolytes, which makes it possible to increase the reliability and durability of the hardened parts operation by changing the conditions of electrocrystallization, that is, directed formation of the structure and texture, thickness, roughness and microhardness of chromium plating. The practical recommendations are given on the current and temperature regimes of chromium deposition and composition of baths used for the restoration and hardening of the machine parts. Moreover, the basic methods of machining allowances removal are analysed.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/327/3/032008