There is a color difference on the surface of the stainless steel heat exchange tube, which means that the white spot is the difference in the surface color of the stainless steel heat exchange tube. From a visual observation, some have high brightness, while others have a dull color.
Do you know why?
In fact, this phenomenon is related to many factors, and Mingxin Stainless Steel will introduce it to you below.
Zhejiang Mingxin Stainless Steel Co., Ltd. is a modern stainless steel pipeline system manufacturing enterprise integrating scientific research, production and sales. The company adopts advanced, efficient and mature production management mode. Leading materials for the production of high-quality stainless steel, to provide reliable and safe stainless steel pipes and pipe fittings for global users.
1. Related to raw materials
1. Raw material quality
Good raw materials can produce high-quality products. The element content of good steel strips is relatively stable, and the surface color of the stainless steel heat exchange tubes produced is high; the quality of stainless steel heat exchange tubes produced by poor raw materials is slightly worse, and the element content of the steel strips Unstable, so the surface color of the stainless steel heat exchange tube will be relatively dull.
2. Raw materials
First of all, the commonly used materials for stainless steel heat exchange tubes are 304 and 304L. In terms of material selection, if the hardness of the selected material is too low, it will not be easy to polish during polishing, and it is easy to appear orange peel phenomenon on the surface during deep drawing, which will affect the surface color of the stainless steel heat exchange tube; however, the hardness is relatively high. The stainless steel material will have a better effect when polished, and the glossiness of the surface of the pipe will be better. In addition, it should be noted that the polishing effect of stainless steel heat exchange tubes with a thickness of 0.52-1.1mm will be better. Too thin or too thick will lead to poor control of the force. If the wall thickness is too thick and the strength is insufficient, the polishing strength will not be in place.
3. Defects in raw materials
There are some defects on the surface of raw materials, such as scratches, pitting, scratches, sand holes, etc. These defects will directly affect the production of stainless steel heat exchange tubes, which will lead to defects in the production of stainless steel heat exchange tubes, and the surface is also dark.
Second, related to the manufacturing process
In the production process of stainless steel heat exchange tubes, the polishing process has the most direct impact on the surface color of stainless steel heat exchange tubes. When polishing, if it is affected by external factors (temperature, humidity, etc.), there will be problems in the polishing process of stainless steel heat exchange tubes. If there is a problem with polishing, it will directly cause color difference on the surface of stainless steel heat exchange tubes.
The above is Mingxin’s explanation for the difference in the surface color of stainless steel heat exchange tubes.