Sheet metal processing efficiency of stainless steel surface treatment
by：QY Precision 2020-03-07
Sheet metal processing efficiency of stainless steel surface treatment _ stainless steel sheet metal is relatively popular in modern sheet metal processing industry. Doing a good job in sheet metal surface treatment can not only effectively strengthen the working efficiency of sheet metal processing, it is also a leading field in sheet metal processing technology.
First of all, we need to do a good job of pretreatment of stainless steel surface.
In the process of stainless steel sheet metal processing, in order to produce high-quality sheet metal parts, it is necessary to effectively pre-process the stainless steel surface; The details are as follows: 1. Deburring and removing welding scars;
Using a portable grinding machine, the grinding piece has a glass fiber reinforced plastic fiber matrix resin type and sandpaper type; 2, to oil, dust, soil, fingerprints;
Wash with alkali or pickling or organic solution, sand blasting, polishing and other methods.
Followed by an effective stainless steel surface treatment method.
Common Effective stainless steel surface treatment methods are as follows: 1. Surface whitening treatment stainless steel in the process of processing, after winding, tying, welding and other temperature surface fire treatment, A layer of black oxide scale will be produced on the surface.
This hard gray-black oxide scale is mainly composed of NiCr2O4 and NIF.
It is very effective to remove the strong corrosion method by using hydrofluoric acid and nitric acid, but the cost of using this method is too high, it will also pollute the environment and be harmful to human body.
The corrosion on the surface of stainless steel is large and gradually eliminated by us.
2, stainless steel surface mirror bright treatment method sometimes we need to make the stainless steel surface very bright, looks like a mirror.
Below I will introduce the advantages and disadvantages of these three methods, for our reference only: the characteristics of chemical polishing: less investment, complex parts can also be thrown, high efficiency, applied to the surface polishing of complex goods.
This method can be used to treat the commercial surface with low polishing brightness on the stainless steel surface. The small batch processing with fast processing speed is cost-effective, and there is gas overflow during the treatment process, which requires wind-friendly equipment.
Mechanical polishing features: The surface has good light leveling, high light labor intensity, high cost and serious pollution, complicated parts are difficult to process, and the gloss of the whole product is difficult to reach together, gloss persistence time is not long, only used in the processing of small and medium-sized parts.
Electrochemical throwing features: high mirror gloss and long-term adherence, easy operation, technical stability, less pollution, low cost, good pollution prevention.
It is suitable for requesting long-term adherence to mirror gloss and various objects and can be widely used.
3. Spherical stamping treatment stainless steel spherical stamping treatment is a physical treatment method.
The environmentally friendly stainless steel water tank produced is a process method adopted.
The stainless steel plate pressed by the spherical punching machine has higher strength, corrosion resistance and wear resistance.
It is suitable for the surface of large public buildings or facilities, has a more beautiful appearance, is streamlined, is easy to coordinate with the surrounding environment, and is suitable for collective places or places with beautiful environment.
4. Pickling method usually immerse the parts in aqueous solution such as sulfuric acid to remove thin films such as oxides on the metal surface.
The method of removing oxide scale and rust on steel surface with acid solution is called pickling. Oxide of iron such as oxide scale and Rust (
Colorimetry, Fe2O3, FeO, etc)
Chemical reaction with acid solution, resulting in salt dissolved in acid solution and removed.
Acid used for pickling includes sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, chromium acid, hydrofluoric acid and mixed acid. Most commonly used are sulfuric acid and hydrochloric acid.
Pickling technology mainly includes immersion pickling method, spray pickling method and acid paste derusting method.
In order to eliminate surface adsorption of diatomite carrier and reduce chromatographic peak tailing, the carrier needs pickling or alkali washing before use.
Pickling is to soak the carrier with 6mol/L hydrochloric acid for 2h or concentrated hydrochloric acid for 30 min, filter, wash with water to neutral, and dry.
Pickling can remove iron, aluminum, calcium, magnesium and other impurities on the surface, but can not remove Silicon alcohol base; Pickling carrier is suitable for analyzing acidic samples.