Committed to providing customers with one-stop surface treatment solutions
To become the excellent surface treatment supplier in the globe
+86-13600510559
Phone
+86-13584969897
PVD (Physical Vapor Deposition) and CVD (Chemical Vapor Deposition) are two major thin-film coating technologies. PVD vaporizes materials through physical means (e.g., heating or sputtering), resulting in strong adhesion but slower deposition rates. CVD forms coatings via chemical reactions, off
As a new polishing process, plasma polishing is a trend in stainless steel polishing. If we can make good use of plasma polishing will save us a lot of time and costs.
PVD and CVD are the most commonly used surface treatment methods for tools and moulds, CVD is based on chemical vapour deposition and PVD is based on physical vapour deposition, as they differ in principle, the final coating results are different and each has its own focus in application.
Electrolytic polishing has great advantages over traditional polishing, low cost, small footprint, can polish complex workpieces, has unmatched advantages over traditional polishing.
PVD stands for Physical Vapour Deposition. PVD coating refers to a thin film deposition technique whereby solid materials are sputtered or evaporated in a vacuum environment and deposited as pure materials or alloy components to form a coating on a substrate.
Views: 39 Author: Site Editor Publish Time: 2022-10-14 Origin: Site
In the process of industrial products to diversify, high-grade development, how to improve the quality of moulds directly affect the quality of products is an important task. In the mould manufacturing process, shape processing after the smooth processing and mirror processing is called parts surface grinding and polishing process, it is an important process to improve the quality of the mould. Mastering reasonable polishing methods can improve the quality and service life of moulds.
1. Over-polishing
The biggest problem encountered in the daily polishing process is "over-polishing", that is, the longer the polishing time, the poorer the quality of the mould surface. There are two phenomena of excessive polishing: namely "orange peel" and "pitting". Over-polishing mostly occurs in mechanical polishing.
2. The workpiece appears "orange peel" reason
Irregular rough surface is called "orange peel", produce "orange peel" has many reasons, the most common reason is due to overheating or carburisation of the mould surface caused by excessive polishing pressure and polishing time is too long to produce " orange peel" is the main reason. For example: polishing wheel polishing, the heat generated by the polishing wheel will easily cause "orange peel". The harder steel can withstand the polishing pressure will be larger.
3. Eliminate the workpiece "orange peel" measures
When the surface quality is found to be poorly polished, many people will increase the polishing pressure and extend the polishing time, this practice will often make the surface quality becomes worse. The following methods can be used to remedy this.
(1) Remove the defective surface, grind a slightly coarser grit than previously used and then grind with a lower polishing effort than previously used.
(2) Stress relieving at a temperature of 25 °C below the tempering temperature, grinding with the finest grit until a satisfactory finish is achieved, and finally polishing with a lighter intensity.
4. workpiece surface "pitting" formed by the reason
As some non-metallic impurities in the steel, usually hard and brittle oxide, in the polishing process from the steel surface is pulled out, the formation of micro-pits or pitting, resulting in "pitting" of the following main factors:.
(1) polishing pressure is too large, polishing time is too long.
(2) The purity of the steel is not enough, the content of hard impurities is high.
(3) Surface rusting of the mould.
5. Measures to eliminate pitting on workpieces
(1) Carefully regrind the surface with a slightly coarser grit size than previously used, using a soft and sharp oil stone for the final step of the polishing process.
(2) Avoid using the softest polishing tools when the grit size is less than 1 mm.
