Household appliances used in the production of traditional steel, electro-galvanized steel mainly. In recent years, with galvanized steel mechanical properties and surface quality continues to improve, with electro-galvanized steel sheet compared to its low production costs, strong corrosion resistance and environmental pollution, etc. become increasingly prominent, and thus with its alternative plating zinc steel appliances at home and abroad has become a major trend in the manufacturing industry. However, from the use of electric appliances with galvanized sheet steel to hot galvanized plate is not a simple substitution process. Among them, how to choose the right materials, it is worth studying.
Appliances with a selection of hot dip galvanized steel mainly related to material grades, coating the surface structure and surface treatment and so on. Appliance parts with specific conditions of use and quality requirements for a reasonable selection, to ensure the quality of home appliances under the premise of reducing material costs, and increase overall competitiveness.
Steel appliances generally stamping with a soft steel, its mechanical properties in accordance with national standards, European standards, the Japanese standard, American standard, etc. to be divided, different standards corresponding to different grades of series. According to the material in the course of processing the degree of deformation, usually steel appliances by stamping level is divided into general use, stamping purposes, uses and ultra deep drawing ( special ) deep drawing uses. Overall, the appliance sheet metal parts stamping difficulty is not too large, but there is a big difference between different parts, so the parts should be based on the deformation mode, deformation characteristics and quality requirements of a reasonable selection of materials. Sheet metal parts stamping appliance that may arise in the main problem is cracking , wrinkling and springback. Because steel stamping defects but also with mold conditions related parts stamping process, a reasonable selection should also consider the user's own mold factors and process factors.
The need for plating appliance parts, use glossy plate, so as to achieve the effect of the light after plating. Appliances are mostly bare plate with ( interior parts ) and painted or foil used ( exterior parts ), you should use matte steel, coating and is conducive to enhancing the binding force between the plates. Meanwhile, the matte side of the beneficial effect of lubricating oil, in order to improve the ability of the material forming. Hot dip galvanized steel in accordance with zinc coating structure, zinc solution to add other elements can be divided into ordinary circumstances hot galvanized plate, zinc alloy of plates, zinc-aluminum alloy coated sheet, aluminum-zinc alloy coated sheet. Different kinds of steel sheets having different characteristics, such as zinc alloy plate weldability, zinc-aluminum alloy plate stamping performance, aluminum-zinc alloy sheet and strong corrosion resistance. At present, the major users of domestic appliances using ordinary galvanized steel (GI), small parts using galvanized (GL) and zinc alloy plate (GA). Ordinary hot- dip galvanized sheet surface state can be divided according to their normal spangle boards, finishing spangle boards, panels and small spangle spangle board, different states steel surface quality, corrosion resistance and paint different results. Zinc galvanized steel sheet thick layer of welded parts prone to injury electrodes, welding is not strong or welding wear phenomenon. Meanwhile, in order to ensure steel within a certain period does not produce red rust on the thickness of the zinc layer has certain requirements.
Galvanized sheet in order to prevent the transport and storage process produces white rust, galvanized sheet surface passivation generally require treatment or oiled. Chromate passivation previously widely used approach has better anti- white rust function, but can not meet the requirements of the EU directive RoHs. Currently, some domestic steel companies successfully developed passivation board can fully meet the EU requirements, to enhance the quality of home appliances to make a contribution. According to user needs, galvanized sheet surface can be thin organic coating, such as fingerprint resistant coating film, anti-fingerprint film helps prevent the production and transportation process residual fingerprints, perspiration and other issues affecting the appearance and surface quality. Plate in order to increase the lubricity of the stamping process, the steel sheet surface to reduce friction and damage the steel sheet can be self- lubricated.
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