Production method of Zn/Cu-Ag/Cu-Au composite coating steel band for photoelectric material

Abstract

A production method of a Zn / Cu-Ag / Cu-Au composite coating steel band for a photoelectric material comprises the following steps: using a 08Al cold-rolled steel sheet as a raw material and carrying out cold rolling; after conventional degreasing, carrying out uncoiling, splitting and deburring; hot-dipping Zn; thermally spraying Cu-Ag; carrying out primary annealing at a pure nitrogen protective atmosphere; thermally spraying Cu-Au; carrying out secondary annealing at a pure nitrogen protective atmosphere; and air-cooling to a room temperature and coiling. The tensile strength is 250-300MPa, and the elongation percent is 42-48%. One Zn / Cu-Ag / Cu-Au composite coating is generated on the surface. After the Zn / Cu-Ag / Cu-Au composite coating steel band is placed under an indoor conventional atmospheric condition for 960 days, the gloss loss rate of the coating is not larger than 0.3%, and the surface corroded area is not larger than 0.3%. The product has excellent electricity and heat conductivity. After the Zn / Cu-Ag / Cu-Au composite coating steel band is kept at 300-350 DEG C for 960 days, the surface oxidized area is not larger than 0.2%, and the hardness variation rate is not larger than 0.2%. The product also has excellent welding and machining performance.

Description

technical field [0001] The invention relates to a production method of a steel strip, in particular to a production method of a Zn / Cu-Ag / Cu-Au composite coated steel strip for photoelectric materials. Background technique [0002] In recent years, with the rapid development of electronic information technology and material processing technology, ultra-thin coated steel strips are increasingly used in the preparation of precision semiconductors, electronic chips, IC cards, potentiometers, resistance meters, ammeters, rectifiers and LED light source and other products. [0003] At present, the production of ultra-thin coated steel strips for photoelectric materials is mainly to continuously layer-plate single metals such as Cu, Ni, Ag or Au on the surface of cold-rolled steel strips to form Cu / Ni / Ag or Cu / Ni / Au composites. plating. It has the following disadvantages: one is that the coating is based on Cu, and because Cu is prone to oxidation, the stability of the coating is...

AI Technical Summary

Problems solved by technology

It has the following disadvantages: one is that the coating is based on Cu, and because Cu is prone to oxidation, the stability of the coating is poor.

Although the surface properties, electrical conductivity, and thermal conductivity of the product are good, because the Au-Sn binary alloy is composed of many brittle and hard intermediate phases, when preparing small-sized optoelectronic materials such as CPU chips and LED light sources, the processing and molding of the product Insufficient performance and welding performance

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