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Rod Movable Parts Parts Plating Process Improvement And Alternatives

Posted on:2016-03-04Degree:MasterType:Thesis
Country:ChinaCandidate:X PengFull Text:PDF
GTID:2271330461471381Subject:Materials engineering
Abstract/Summary:PDF Full Text Request
Chromium plating is military production in a common, critical surface plating technology, because of its special properties of the coatings have been applied, the key parts in the military (rod), the conditions of use extremely harsh, harsh. But the existence of current efficiency of deposition of low chromium electroplating, plating of shortcoming, and the factory single product by plating area (about 1dm2/pieces), the unit price to be plated long distance (about 300mm, the longest 630mm), subject to the combined effects of electroplating process shortcomings and product characteristics, chromium electroplating factory products qualified rate is low, the labor intensity and the degree of environmental pollution, is not in accord with the environmental requirements of modern society. But because of the characteristics of the product demand, currently only on the technology and method of processing optimization, adjustment, the factory plans through measures to change the product plating pretreatment method machine geometry size before electroplating, change and optimization of plating process parameters, to reduce the impact of these factors on chromium plating process. Through the implementation of these measures, the comprehensive qualified rate of chromium plating rod-shaped activity components from the past 50% or so sharply, at present has been stable at 80% to 85%, because of its low qualification rate leads to reduce repeated electroplating chromium, reduce production time, directly reduce factory production costs, reduced with the increase of chromium plating waste water cleaning, to reduce the risk and disposal costs of pollution environment.Research shows that both at home and abroad, QPQ, coating technology, electroless nickel plating technology, because of its close to the physical properties, chemical properties and chromium plating layer, coating high size precision, production condition is easy to control, its mechanical properties of products without damage (small), in the eighty or ninety’s of last century, has been widely applied in all kinds of product requirements the same process characteristics of demand and conditions of use; the factory after groping research for about three years and is now in trial production of small quantities, part of a single hair of high-end products on the application, and the product design, archiving, up to the complete abolition of the purpose of the study of chromium electrodeposition in these high-tech products. At the same time, but also enrich the selection process of new product design in the future, the military products completely abolished chromium electroplating process become reality in the future.
Keywords/Search Tags:Chromium plating, rod-shaped activity components, comprehensive qualified rate, Quench-Polish-Quench, coating technology
PDF Full Text Request
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