The manufacturing method of the continuous annealing spcc steel strip and the continuous annealing spcc steel strip with performance close to the cover annealing product
A manufacturing method and steel strip technology, applied in the field of metallurgy, can solve problems such as high yield strength of products, achieve the effects of optimizing product structure and precipitation, shortening the steelmaking process, and reducing costs
Active Publication Date: 2022-03-08
LIUZHOU IRON & STEEL +1
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The invention provides a manufacturing method of continuous annealing of SPCC steel strips and continuous annealing of SPCC steel strips, that is, a method for manufacturing continuous annealing of SPCC steel strips and continuous annealing of SPCC steel strips with performance close to that of covered products, so as to solve the problem of existing SPCC steel strips. The problem that the continuous annealing process makes the product yield strength higher
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.
[0028] Invention principle:
[0029] The applicant compared the metallographic structure of the continuously returned product and the masked returned product. The metallographic structure of the continuous return product and the cover return product are as follows: Figure 1a and shown in b. Compared with the annealed product, the continuous annealed product has a smaller grain size, less carbide precipitation in the steel, and the carbon element mainly exists in the form of solid solution carbon in the steel. The applicant believes that the smaller grain size and higher solid solution carbon content are the main reasons for the high yield strength and easy yield plateau of continuously annealed products.
[0030] The existing continuous annealing process for SPCC s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for manufacturing a continuously annealed SPCC steel strip whose performance is close to that of a cover-retired product and a continuously-annealed SPCC steel strip. Continuous annealing; continuous annealing process parameters are: heating section outlet temperature 810±2℃, soaking section outlet 810±2℃, slow cooling section outlet 720±2℃, fast cooling section outlet 400±2℃, overaging section outlet 400±2℃, final cooling outlet temperature 170±2℃. Continuously retreating SPCC steel strip, the chemical composition weight percentage of the steel strip is C: 0.05%-0.07%, Si≤0.02%, Mn: 0.1%-0.2%, P≤0.02%, S≤0.015%, N≤0.005 %, Al: 0.03% to 0.05%. The invention shortens the steelmaking process flow and annealing process flow, improves production efficiency, reduces cost, and optimizes product structure and precipitation.
Description
technical field [0001] The invention relates to the field of metallurgy, in particular to a continuous annealing process for low yield strength SPCC steel strips, in particular to a continuous annealing SPCC steel strip manufacturing method and a continuous annealing SPCC steel strip whose performance is close to that of an annealed product. Background technique [0002] Common cold-rolled steel plate SPCC (Steel plate cold-rolled common) is a low-carbon aluminum-killed steel widely used in the automobile manufacturing industry, home appliance industry, galvanized tin-plated substrate, etc., and occupies a dominant position in the current cold-rolled product market . There are two main ways to produce SPCC products: bell annealing (referred to as hood annealing) and continuous annealing (referred to as continuous annealing). Compared with the two production processes, SPCC products produced by the continuous annealing process have good surface quality, stable and uniform per...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/56C21D11/00C21D1/26C21D6/00C22C38/02C22C38/04C22C38/06
CPCC21D9/561C21D11/00C21D1/26C21D6/008C21D6/005C22C38/02C22C38/04C22C38/06
Inventor 周博文樊雷叶姜钱学海蒋才灵杨跃标阮志勇邓深董苑华张应强庞通陆茂森
Owner LIUZHOU IRON & STEEL