Stainless Steel Casting The Needs Of The Market
Domestic stainless steel casting is widely used in valves, pumps, marine hardware, auto parts, pipe parts and other fields, machining with abrasive, geological drill and stone sawing tool manufacturing process level has been greatly improved. Products have formed a series, standardization, variety specifications complete, Stainless Steel Casting product quality and stability, some products in the international market has a certain competitiveness.
To meet the needs of domestic and foreign tool market, we must speed up the development of new products, improve product quality, increase varieties, Stainless Steel Casting increase production. In recent years, the demand for diamond tools has been increasing year by year in the fields of valves, pumps, marine hardware, auto parts and piping parts. At present, these products are still dependent on imports in China. Therefore, it is necessary to develop high quality series of tools as soon as possible To replace imports. To ensure the quality of its products, we must speed up the promotion of new technologies and new technologies such as vacuum welding technology, EDM sintering technology, diamond uniform technology, diamond plating iridium technology and metallization bonding technology, laser welding process.
When we use stainless steel castings, Stainless Steel Casting we often appear when the anodic oxide film stained with white spots. The reason for this situation is because the stainless steel castings loose, Stainless Steel Casting high porosity, containing a variety of metal and non-metallic impurities, so the quality of the oxide film is often more difficult to ensure that the way to avoid contamination of stainless steel casting:
1, high voltage and high current density impact method. That is, in the early stages of oxidation of stainless steel castings on the use of high-voltage shock, so that the part has been oxidized by electric shock and then connected into a 2, surface grinding method. This method is to fill the aluminum grinding has been filled with the part of the gap has been oxidized, so that the resulting gap together, as the role of the bridge.
3, surface shot peening method. This method is to use a round hammer beating the gap, by tapping to close, can be achieved into the film for the purpose. We have to choose according to the degree of contamination of stainless steel casting corresponding to the corresponding method. According to the relevant information, casting is not cleared before the pit filled with slag material. The lithofacies analysis shows that there are chemicals such as ferric silicate, manganese silicate and chromium silicate in the slag material at the defect. The results of electron diffraction show that the black pitting is composed of magnetite (Fe3O4) and iron chrome spinel (FeO · Cr2O3). As a result of the spectral analysis, the silicon content in the metal component at the defect is increased and the amount of manganese is very small. After the castings are shot blasting and blasted, the surface of the castings will have gray and black pits, Stainless Steel Casting which often appear in the local thick sections, corners and bore parts of the castings, and even the entire surface of the castings.
Stainless steel casting surface cleaning is divided into dry and wet two categories, dry cleaning method is mainly shot blasting, wet cleaning method is mainly a little solution of hydraulic sand, water sand,
Dry clean-up method is to blasting the main treatment of the surface of the stainless steel casting surface cleaning, shot blasting treatment is simply to use compressed air as the driving force, Stainless Steel Casting so that the projectile to a certain speed jet to the surface of stainless steel castings, remove the surface Of the sand and iron oxide skin, but this friction cleaning method due to low efficiency, clean up uneven, poor results and other reasons, has been used by the factory, has been almost eliminated.