At present, stainless steel seamless pipes are usually polished during production. Only a few products, such as water heater, drinking water machine liner, and so on, do not need polishing.
So this requires that the polishing performance of the raw material is very good. The factors that affect the polishing performance include the following points.
(1) surface defects of raw materials. Such as scratches, pits, pickling etc.
(2) stainless steel pipe material. Hardness is too low, polishing is not easy to shine (BQ is not good), and hardness is too low, when deep drawing, the surface is too low.
It is easy to appear the phenomenon of orange peel, which affects the BQ character. The BQ property with high hardness is relatively good.
(3) after deep drawing products, there will be small black spots and RIDGING on the surface of large deformation area, which will affect the BQ property.
The requirements of weldability stainless steel pipes are different for different welding performance. A kind of tableware usually does not require welding performance, and even includes
Part pot enterprises. But most products need raw material welding performance, such as two kinds of tableware, thermos cups, steel pipes, water heaters, water dispensers.
Most stainless steel seamless pipes require good corrosion resistance. Stainless steel pipes are like one or two kinds of tableware, kitchenware, water heater, water dispenser and so on.
Foreign businessmen also made corrosion resistance test for products: NACL water solution was heated to boil, and after a period of time, the solution was removed, washed, dried and weighed.
Loss is used to determine the degree of corrosion. (Note: when the product is polished, the Fe on the abrasive cloth or sandpaper will cause rust on the surface of the test.
Huzhou Zhongrui Precision Technology Co.,Ltd
Add: Huicheling Industrial Zone, Heping, Changxing, Huzhou, Zhejiang
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