A processing technology of zinc-nickel-nickel strip for shielding
A processing technology, zinc-nickel-nickel copper technology, applied in the direction of metal processing equipment, manufacturing tools, surface polishing machine tools, etc., can solve the problems of large fluctuations in mechanical properties, improper cleaning process settings, unsatisfactory results, etc., to reduce process costs, Reduce the probability of oxide layer, good grinding effect
Active Publication Date: 2020-10-23
JINTIAN COPPER GROUP CORP NINGBO
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Problems solved by technology
However, the mechanical properties of the material fluctuate greatly in different positions of the copper alloy strip, and in the subsequent use of zinc white copper, if the oxide layer after annealing is not removed, it is easy to oxidize, yellow and discolor and be scrapped
[0005] In addition, the high-temperature oxidation problem of zinc white copper can be solved by cleaning process after annealing, but the existing cleaning process has the problem of complex design or improper cleaning process setting, resulting in unsatisfactory results
Method used
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[0024] The present invention will be further described in detail below in conjunction with the embodiments.
[0025] Select 14 groups of zinc cupronickel (component C7701) to process according to the process of the present invention as an example.
[0026] The process flow of the 14 groups of zinc-nickel alloy embodiments: batching → casting → milling → rough rolling → intermediate annealing → thick shear → grinding and polishing → washing → intermediate rolling → bottom annealing → grinding and polishing → finished product rolling → degreasing and washing → straightening →Cutting→Packing and storing.
[0027] The process flow of comparative example C7701: batching → casting → milling → rough rolling → intermediate annealing → thick shear → grinding and polishing → washing → intermediate rolling → bottom annealing → grinding and polishing → finished rolling → finished annealing → degreasing and washing → straightening →Cutting→Packing and storing.
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Abstract
The invention relates to a processing technology of a zinc cupronickel strip for shielding. The processing technology comprises the following steps of casting, face milling, hot rolling, intermediateannealing, medium rolling, bottom reservation annealing and finished product rolling; the processing technology is characterized by performing grinding and polishing correspondingly after intermediateannealing and bottom reservation annealing; the grinding and polishing process comprises the following step of carrying out polishing and grinding by using 3-9 groups of grinding brushes, wherein thegrinding brushes are 400-3000 meshes, the radius of the grinding brushes is 200-400 mm, the rolling reduction is 5%-30%, and the rotating speed is 300-1000 r / min; in the case of the bottom reservation annealing process, the annealing temperature is 380-680 DEG C, and the heat preservation time is 6-12 h; and the rolling rate of a finished product is 5%-15%. The zinc cupronickel strip disclosed isexcellent in high-temperature oxidation resistance, low in processing cost and excellent and stable in mechanical property.
Description
Technical field [0001] The invention relates to a copper alloy processing technology, in particular to a processing technology of a zinc-nickel alloy strip for shielding. Background technique [0002] Zinc cupronickel alloy, because of its beautiful luster, excellent cold and hot workability, ductility, corrosion resistance and fatigue resistance, is widely used in mobile electronic communication equipment and precision devices. With the rapid development of electronic components, customers' requirements for zinc white copper strips are becoming increasingly strict. At present, during the use of the zinc-nickel alloy alloy, the surface of the zinc-nickel alloy strip is prone to yellowing and discoloration during high-temperature welding, which seriously affects the appearance and performance of the product and causes the delivery of the zinc-nickel alloy to fail. Moreover, for manufacturers, once high-temperature oxidation discoloration occurs, they can only be returned to the f...
Claims
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IPC IPC(8): C22F1/08C21D9/52B24B1/00B24B29/00
CPCB24B1/00B24B29/005C21D9/52C22F1/08
Inventor 华称文巢国辉傅杰种腾飞甄茂忠
Owner JINTIAN COPPER GROUP CORP NINGBO