A method for preparing a transparent wear-resistant film suitable for watch parts

Abstract

The invention discloses a preparation method for a transparent abrasion-resistant film suitable for a clock part. Niobium pentoxide and zirconium dioxide composite plating transparent film technology under the high vacuum condition is adopted, the plating target material is a niobium pentoxide and zirconium dioxide composite, wherein the content of the niobium pentoxide is 85%-95%, and the content of the zirconium dioxide is 5%-15%. An intermediate frequency constant-voltage coating power source is adopted, the voltage is 400 V, the frequency is 5 KHz-15 KHz, a power anode is connected with a workpiece, and a cathode is connected with the target material. Argon serves as protective gas and is used for adjusting the in-furnace vacuum degree, and the in-furnace vacuum degree is 5.0-6.0x10-3 Pa, the temperature is 200 DEG C-300 DEG C, and the coating time is 10-30 minutes. The composite film prepared through the preparation method is transparent, the original appearance impression of the clock is not lowered, abrasion resistance is good, corrosion prevention performance is high, the film layer brittleness is small, the film layer falling phenomenon is avoided, and constancy of the original bottom color can be ensured.

Description

technical field [0001] The invention relates to a preparation method of a transparent film, in particular to a preparation method of a transparent wear-resistant film suitable for watch parts. Background technique [0002] Watch parts such as watch bases and straps are generally made of austenitic stainless steel, but the hardness of austenitic stainless steel is not high, and it is prone to defects such as scratches and scratches. Generally, chemical heat treatment is required to improve its hardness, but chemical heat treatment After the structure of the base material changes, the anti-corrosion performance will be significantly reduced; in addition, due to the needs of decoration, some parts of the clock and watch parts need to be coated with various colored coatings (films) after chemical treatment, such as the rose gold layer (main component It is gold), these coating (film) layers are not wear-resistant, and are prone to scratches, scratches, discoloration, and fading....

AI Technical Summary

Problems solved by technology

[0002] Watch parts such as watch bases and straps are generally made of austenitic stainless steel, but the hardness of austenitic stainless steel is not high, and it is prone to defects such as scratches and scratches. Generally, chemical heat treatment is required to improve its hardness, but chemical heat treatment After the structure of the base material changes, the anti-corrosion performance will be significantly reduced; in addition, due to the needs of decoration, some parts of the clock and watch parts need to be coated with various colored coatings (films) after chemical treatment, such as the rose gold layer (main component is gold), these coating (film) layers are not wear-resistant, and are prone to scratches, scratches, discoloration, fading, etc.

The quality requirements for watch parts are: (1) good anti-corrosion performance, and the standard salt spray resistance time is not less than 72 hours; (2) good wear resistance, high surface hardness, which requires more than 700Hv; (3) constant color, no Discoloration is allowed; (4) The coating (film) layer has a certain degree of ductility, and the bonding force with the substrate is better, and can pass the bonding force detection of watch parts; the existing technology cannot meet the above requirements

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