A kind of cold-rolled steel plate and preparation method thereof
A cold-rolled steel plate and slab technology, applied in the field of cold-rolled steel plate and its preparation, can solve the problems of difficulty in obtaining strength and formability, and high cost of cold-rolled steel plate
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0024] The present invention provides a method for preparing cold-rolled steel plates, the method comprising: sequentially hot-rolling, coiling, cold-rolling, annealing, skin-passing and tension-leveling of the slab, wherein, after the hot-rolling and after the Before coiling, the intermediate slab obtained after hot rolling is cooled to 700-750 °C at a cooling rate of 70-90 °C / s, and then air-cooled to the coiling temperature; the coiling temperature is 580-630 °C; The reduction rate of the cold rolling is 65-80%; the annealing method is continuous annealing. During the annealing process, the intermediate slab obtained after cold rolling passes through a heating section, a soaking section, and a cooling section in sequence. section, low temperature maintenance section, overaging section and secondary cooling section, the intermediate slab obtained after the cold rolling is in the heating section, the soaking section, the primary cooling section, the low temperature maintenance...
Embodiment 1-3
[0053] This example is used to illustrate the cold-rolled steel sheet of the present invention and its preparation method.
[0054] The continuous casting slab (thickness: 200mm) of the present invention was obtained by smelting in converter, Ca treatment in LF furnace, RH decarburization and continuous casting, and its composition is shown in Table 1. The continuous casting slab is heated in the heating furnace to the rough rolling opening temperature and enters the reversible rough rolling unit. After rough rolling, the intermediate slab enters the hot coil box, and the strip head and tail are exchanged, and then the finish rolling is carried out. After finishing rolling, it is rapidly cooled to the final cooling temperature according to the specified cooling rate, and then after a period of online air cooling, coiling is carried out at the coiling temperature (the hot rolling process and the cooling process are carried out according to the conditions in Table 2). Carry out ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More