Properties of hot-dip galvanized sheets after heating
|11.3.2019||Posted by juniperqq under Advertising & Marketing|
The hot dip galvanized steel coil supplier has done a lot of research on the relationship between the stamping formability of hot dip galvanized sheet and the microstructure of the coating. The results show that the key to good adhesion of the coating is the phase structure and iron content of the coating. In the hot-dip galvanized strip, the hot-dip galvanized sheet was developed by post-plating thermal diffusion treatment, and the corrosion resistance was more than doubled compared with the conventional hot-dip galvanized sheet. The zincation on the surface of the coating can be eliminated by this alloying treatment. At the same time, the evaporation of zinc during spot welding is reduced, and the degree of contamination of the copper electrode of the spot welder by zinc vapor is reduced, thereby improving the life of the electrode.
Under the condition of small deformation in the leveling process, how to further strengthen the shape control ability and control effect of the ordinary four-roll leveling machine. One possible conventional approach is to use a complex leveler model and a luxurious system configuration. For example, in the continuous retreat unit, the HC6, CVC series six-roller leveling machine or VC four-roller leveling machine is usually used in the system. The system configuration uses a flatness instrument for plate-shaped closed-loop control and a laser speedometer for speed and flat extension. Rate closed-loop control, etc. The practice has proved that this will inevitably lead to a substantial increase in construction investment and operation and maintenance costs, and even so, it may not be able to completely solve the shape problem of some products such as high-strength steel.