Low-temperature stress relieving and tension straightening process of copper alloy plate and strip foils

Abstract

The invention relates to a low-temperature stress relieving and tension straightening process of copper alloy plate and strip foils. The process comprises the steps of uncoiling, degreasing, scrubbingfor the first time, drying for the first time, performing low-temperature stress relief and tension straightening, pickling, scrubbing for the second time, passivating, drying for the second time andcoiling. According to the low-temperature stress relieving and tension straightening process, expanded stress relief annealing is adopted, so that partial residual internal stress of materials is eliminated, the deep processing requirements of copper alloy materials are satisfied, and especially, the requirements of etching and half etching of high-end frame materials are preferably satisfied; high-tension straightening is adopted at low temperature, so that the plate shapes of the copper plate and strip foils are improved, and slight bad plate shapes such as edge waves and the like before annealing are eliminated; the materials are still kept at an original state after stress relief annealing, and additionally, the plasticity and the electrical performance of the materials are improved;copper strip expanded through type annealing is adopted, so that the phenomenon of nonuniformity in annealing is avoided; and the requirement on the internal stress of deep processing of the domesticcopper alloy plate and strip foils is satisfied at present, and especially for the requirement of half etching of the high-end frame materials, copper plates after etching do not warp or distort.

Description

technical field [0001] The invention relates to the field of non-ferrous metal processing, in particular to a low-temperature stress-relieving tension straightening process for copper alloy strip foil. Background technique [0002] Copper strips and foils are widely used in electronics, rail transit, machinery, construction, metallurgy, electric power, hardware and other fields because of their good electrical and thermal conductivity and ductility; there are many deformation methods, such as rolling, shearing, forging etc., and the material will produce a certain amount of internal stress through processing and deformation. The existence of internal stress will cause different degrees of deformation of the material during the subsequent deep processing of copper alloy materials such as etching, stamping, and shearing, such as etching warpage. , distortion, inconsistent thickness of stamping extension, etc. Therefore, how to eliminate the internal stress of copper alloy thr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a low-temperature stress-relief tension straightening process for copper alloy strips and foils, which not only eliminates the internal stress of copper alloy strips and foils, but also improves the shape of the strips, solving the current problems. Internal stress requirements for deep processing of domestic copper alloy sheets, strips and foils, especially for high-end frame materials for half-etching, no warping and twisting of copper plates after etching

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