? Wuxi Duorunde Steel Tube Co., Ltd (I'll answer); ? The roughness of shock absorber fine-drawn tubes and fine-drawn precision steel tubes depends on a number of factors during manufacturing and processing, including material composition, heat treatment, machining process, surface treatment and so on. Generally speaking, the roughness of shock absorber fine-drawn tubes can reach Ra 0.8~1.6, while the roughness of fine-drawn precision steel tubes can be higher, reaching Ra 0.4~0.8.?
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The manufacturing and processing of shock absorber fine-drawn tubes requires several processes, such as smelting, continuous casting, drawing and heat treatment. Each of these processes will have an impact on the surface quality and roughness of the steel pipe. In order to ensure that the surface quality and roughness of shock absorber fine-drawn tubes meet the requirements, it is necessary to carry out strict quality control and technical requirements in the manufacturing and processing process.
Specifically, the roughness of the shock absorber fine-drawn tube is mainly affected by the following factors:
1. Smelting and continuous casting: smelting and continuous casting is the basic link in the manufacture of steel pipe, and it is necessary to control the quality and composition of the raw material to ensure that it meets the standard requirements. At the same time, smelting and continuous casting process temperature, time, cooling rate and other parameters will also have an impact on the surface quality and roughness of steel pipe.
2. Drawing: drawing is one of the important links in the manufacturing process of shock absorber fine-drawn tube, you need to control the amount of deformation, speed, temperature and other factors in the drawing process, in order to avoid scratches, cracks and other problems on the surface of the steel pipe. At the same time, the lubricant in the drawing process will also have an impact on the surface quality and roughness of the steel pipe.
3. Heat treatment: heat treatment is another important link in the manufacturing process of shock absorber fine-drawn tubes, and it is necessary to control the temperature, time and other factors in the heating and cooling process to avoid oxidation, decarburization and other problems on the surface of the steel tube. At the same time, the cooling rate in the heat treatment process will also have an impact on the surface quality and roughness of the steel pipe.
4. Surface treatment: shock absorber fine-drawn tube needs surface treatment after manufacturing, such as grinding, polishing, plating and so on. These treatments will directly affect the surface quality and roughness of the steel pipe. The roughness of shock absorber fine-drawn tubes and fine-drawn precision steel tubes depends on the combined effect of several factors. In order to ensure that their surface quality and roughness meet the requirements, it is necessary to carry out strict quality control and technical requirements in the manufacturing and processing process, as well as appropriate surface treatment. At the same time, in order to ensure that its performance and quality meet the relevant standards and customer requirements, strict testing and inspection is required.