Alloyed hot dip galvanizing sheet steel and process for production thereof
A technology of hot-dip galvanized steel sheet and manufacturing method, which is applied in the direction of hot-dip galvanizing process, metal material coating process, coating, etc., can solve the problems of uneven trace components, non-disclosure, uneven oxide film, etc., and achieve the appearance Good effect with excellent paintability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1～13、 and comparative example 1～11
[0055] Table 1 shows the composition of the annealed very low carbon steel sheets used in the tests. After pretreatment according to the conditions shown in Table 2, in the plating bath shown in Table 3 by electroplating (bath temperature 60 ° C, current density 30A / dm 2 ) for pre-plating Ni.
[0056] Then, at 3% H 2 +N 2 In the atmosphere, heat up to 450°C at a heating rate of 50°C / sec, immediately dip in a hot-dip galvanizing bath kept at 450°C, keep for 3 seconds and then wipe to adjust the weight per unit surface area of the coating, just after wiping Alloying is carried out at the specified heating rate, temperature, and soaking time. With regard to cooling, rapid cooling was performed at 20°C / sec after slow cooling at 2°C / sec for 10 seconds. Then, temper rolling was performed at a reduction ratio of 0.5%.
[0057] Samples were produced under various conditions (Ni pre-deposition amount, Al concentration in the plating bath, alloying conditions) shown in Table 4. ...
Embodiment 14～22 and comparative example 12、13
[0086] Table 7 shows the composition of the annealed very low carbon steel sheets used in the tests. After pretreatment using the conditions shown in Table 2, electroplating was carried out in the plating bath shown in Table 3 (bath temperature 60°C, current density 30A / dm 2 ) for pre-plating Ni.
[0087] Then, at 4% H 2 +N 2 Heated to 455°C at a heating rate of 50°C / sec in an atmosphere, immediately immersed in a hot-dip galvanizing bath kept at 450°C, kept for 2.5 seconds and then wiped to adjust the weight per unit surface area of the coating. Immediately after wiping, use After heating up at 50°C / sec and holding for 4 seconds, rapid cooling was performed at 50°C / sec. Thereafter, temper rolling was performed at a reduction ratio of 0.5%.
Embodiment 19～25 and comparative example 15～17
[0106] Using the cold-rolled and annealed original plate shown in Table 1, after performing the pretreatment shown in Table 2, it was electroplated in the plating bath shown in Table 3 (bath temperature 60°C, current density 30A / dm 2 ) for pre-plating Ni. Then, at 3% H 2 +N 2 Heating to 460°C at a heating rate of 50°C / sec in the atmosphere, immediately dipping in a hot-dip galvanizing bath kept at 455°C, keeping it for 3 seconds and then wiping to adjust the weight per unit surface area of the coating, the weight per unit surface area of the coating is 60g / m 2 . Then heat alloying treatment is performed under predetermined conditions. Cooling after heating was performed at 2°C / s for 10 seconds, followed by rapid cooling at 20°C / s. Then, temper rolling was performed at a reduction rate of 0.5%. In addition, the samples used for observing the interface alloy layer were dipped in a hot-dip galvanizing bath, held for 3 seconds, and then rapidly cooled.
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More