The application of stainless steel ball in the production of industrial machinery is very extensive, and plays an irreplaceable role. Stainless steel ball according to its own characteristics of the model style is different, the use is different. And also from the stainless steel ball itself raw material processing. And affected by various conditions, the hardness of stainless steel balls is also different.
(1) Material:
① DDQ (deep drawing quality) material: Refers to the material used for deep drawing (punching), that is, the soft material we say, the main characteristics of this material are high elongation (≧ 53%), low hardness (≦ 170%), internal grain grade between 7.0~8.0, excellent deep drawing performance. At present, many enterprises that produce thermos bottles and POTS, the processing ratio of their products (BLANKING SIZE/ product diameter) is generally relatively high, and their processing ratio is 3.0, 1.96, 2.13, and 1.98, respectively. SUS304 DDQ materials are mainly used for these products that require a higher processing ratio, of course, products with a processing ratio of more than 2.0 generally need to be completed after several stretches. If the extension of raw materials can not be reached, the phenomenon of cracking and pulling through is easy to occur in the processing of deep-drawn products, which affects the qualified rate of finished products, and of course increases the cost of manufacturers;
② General materials: Mainly used for materials other than DDQ purposes, this material is characterized by relatively low elongation (≧ 45%), relatively high hardness (≦180), internal grain size grade between 8.0 and 9.0, compared with DDQ materials, its deep drawing performance is relatively poor, it is mainly used for products that can be obtained without stretching. Like a type of tableware spoon, spoon, fork, electrical appliances, steel pipe use. However, it has an advantage compared with DDQ materials, that is, the BQ property is relatively good, mainly due to its slightly higher hardness.
Post time: Nov-10-2023
