Special-shaped copper alloy strip and production method thereof

Abstract

The invention relates to a special-shaped copper alloy strip and a production method thereof. The special-shaped copper alloy strip contains, by weight, 0.075%-0.14% of iron, and 0.025%-0.04% of phosphorus, has higher hardness and conductivity, and can meet the ever-increasing requirement of the performance of the lead wire frame. The production method for the special-shaped copper alloy strip is also disclosed, the production method includes the following steps of preparation of a mother belt, high speed forging, continuous annealing, surface washing and lapping, surface oil washing, roller type rolling, on-line detection and interleaving paper coiling, specifically, after the mother belt is forged at high speed and is preliminarily formed, and continuous annealing is used for fully releasing the internal stress of the forged strip material, accordingly the annealing quality is improved, and cracks generated at the thick-thin junction of the strip material are prevented; the strip is ground and polished while surface washing is conducted, accordingly the flatness of the belt surface is greatly improved, and the strip surface can evenly make contact with roiling oil when the surface is washed with oil, and accordingly the antioxidant treatment effect is guaranteed and the machining quality of the copper alloy strip is improved.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal processing, in particular to a special-shaped copper alloy strip and a production method thereof. Background technique [0002] The improvement in the degree of integration of electronic components has greatly increased the performance requirements for the conductivity, hardness and flatness of the lead frame. In addition to conventional flat strips, special-shaped copper alloy strips with cross-sections "T" and "U" are widely used as lead frames in the market. The main processing methods of special-shaped copper alloy strips include continuous roll rolling method, upward continuous casting-rolling method, forging-rolling method and milling method. Among them, the continuous roll rolling method and the upward continuous casting-rolling method lack the corresponding surface treatment process, resulting in poor surface quality and low precision of the produced special-shaped copper alloy s...

AI Technical Summary

Problems solved by technology

Among them, the continuous roll rolling method and the upward continuous casting-rolling method lack the corresponding surface treatment process, resulting in poor surface quality and low precision of the produced special-shaped copper alloy strip, and are also prone to deflection, wavy edges, and side bending. and other quality defects; the milling production process will strip a large amount of material, and the yield is low

[0003] Most factories in China use the upward continuous casting-rolling method, and the surface quality of the special-shaped copper strips produced by them is poor, which cannot be used in the high-end electronic market; a few factories use the forging-rolling method, due to backward technology and production equipment, The special-shaped copper strip produced by it has low precision, is easy to oxidize, and is prone to longitudinal cracks, so it cannot be stably supplied to the high-end market