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Stainless steel common character
Issuer:Huanyulongfei Issue time:2008-10-7 Read£º174 times
Stainless steel common character 1-1Beautiful surface and diverse applications High quality of rust prevention and aging-resistance High intensity, so increase the possibility of usage High endurance to high temperature make it resist to fire Normal temperature, namely easy to plastic working No need for superficial process , so easy to maintain High degree of pureness&smooth finish High welding performance 2-1Stainless steel quality character
2-2The properties of stainless steel quality requirements
¡ùDue to the different use of products, the processing techniques and quality also different. 2-3Quality Characteristics of stainless micro items (1)Material ¢ÙDDQ (deep drawing quality) material: Deep drawing is for (-) use of materials, that is, everyone said the soft material, such material is the extension of the main features of a higher rate (¨R 53%), a hardness Low (¨Q 170%), internal grain grading between 7.0 to 8.0, deep drawing an excellent performance. At present, many production vacuum flask, dishes enterprises, the processing of their products than (BLANKING SIZE / products in diameter) higher than normal, respectively, than their processing of 3.0,1.96,2.13,1.98. SUS304 DDQ wood is mainly used in processing these requests higher than the product, of course, the processing of products than the more than 2.0 are generally subject to several Road, the stretch to complete. If the area of raw materials has not been extended, in the deep-processing products at the product easy to pull a crack, pull through the phenomenon, affecting the rate of qualified products, of course, it has increased the cost of manufacturers of time ¢ÚApart from the material mainly used for general purposes, DDQ materials, such materials are characterized by relatively low elongation (¨R 45%), and the hardness of the relatively high (¨Q 180), in the hierarchy within the grain size of 8.0 to 9.0, DDQ and timber, its deep-performance relative weak, it mainly belongs to the products that no need for stretching, as a class of the spoon utensils, spoons, forks, electrical appliances, steel pipes, and other purposes. DDQ and it has an advantage compared to wood, is the BQ of relatively good, mainly because of its slightly higher because of the hardness. (2) Surface quality:
Stainless steel sheet is a very high price of materials, customers of its surface quality requirements are also very high. However, stainless steel plate in the production process will inevitably arise various defects such as scratches, Ma, creases, pollution, so as to the quality of its surface, such as scratches and creases defects such as whether senior or junior all wood Not allowed to appear, and Ma point this shortcoming in the spoon, spoon, fork, production is also not allowed to, because when polishing it difficult to discard. According to various defects in the surface of the extent and frequency, to determine its quality and grade table, to determine grade products. (3) Thickness of Tolerance:
In general the different stainless steel products, raw materials thickness tolerance requirements also vary, as the second category, such as food and insulation Cup, the thickness of tolerance generally require higher, at -3 ~ 5%, and a thickness of tolerance generally require utensils -- 5 percent, 10 percent of steel pipe demand category, hotel refrigerator with wood thickness tolerance requirements for 8 percent, dealers on the thickness of tolerance in the general requirements of 4 percent to 6 percent between. At the same time, export of various products will lead to customer demand for raw materials of different thickness tolerance. General export products, the thickness of higher tolerance, and the thickness of the domestic enterprises to relatively low tolerance requirements (mostly for cost considerations), and some even require customers to 15%. (4) Welding:
Use of different products on welding performance requirements is also different. A welding of the tableware in general not to request, even including some of the pot enterprises. But the vast majority of products will need a good performance of welding materials, as the second category cutlery, cups insulation, pipe, water heaters, drinking fountains, and so on. (5) Corrosion resistance:
The vast majority of stainless steel products require good corrosion resistance, as a second class tableware, kitchen utensils, water heaters, drinking fountains, and so on, some foreign businessmen to products also do corrosion resistance test: The NACL solution to the boiling temperature, for a period of time after the inverted Swap solution, wash drying, said weight loss, to determine the extent of corrosion (Note: polished product, because of emery cloth or sandpaper Fe contains the elements, would lead to a test surface rust) (6) Polished performance (BQ):
Currently in the production of stainless steel products generally have been polishing this process, only a few products such as water heaters, drinking fountains and other interior does not need polishing. This requires that the raw materials so polished performance very good. Polishing of the factors affecting mainly the following points:
¢Ù raw materials surface defects. Such as scratches, Ma, too, such as pickling.
¢Ú material issues of raw materials. Hardness is too low, when polishing hard-throwing (BQ of bad) and the hardness is too low, in deep stretch when a surface-orange peel, thereby affecting BQ of. Hardness of the relatively high BQ like.
¢Û Deep stretch after the products, deformation of the surface area will be great to small black spots and RIDGING, thus affecting the BQ . 3£®All the features and use stainless steel
