Hardening parts by chrome plating in manufacture and repair

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Astanin, V.K.^1 ; Pukhov, E.V.^1 ; Stekolnikov, Y.A.^2 ; Emtsev, V.V.^1 ; Golikova, O.A.^1

Voronezh State Agricultural University Named after Emperor Peter the Great, Mitchurina St., 1, Voronezh

394087, Russia^1

Elets State University Named after I. A. Bunin, Kommunarov St., 28, Elets

399770, Russia^2

关键词: Chromium deposition;    Electrocrystallization;    Engineering industries;    Environmental influences;    Manufacturing methods;    Practical recommendation;    Reliability and durabilities;    Temperature and pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/3/032008/pdf
DOI  :  10.1088/1757-899X/327/3/032008

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

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.