A Refining Argon Blowing Method Applied to SPHC Steel
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of steel type and argon gas, which is applied in the field of iron and steel metallurgy and steelmaking, can solve the problems of silicon increase, easy carbon increase, etc., and achieve the effect of solving easy carbon increase, promoting floating, and reducing power consumption
Active Publication Date: 2016-06-15
SHANDONG IRON & STEEL CO LTD
View PDF2 Cites 2 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] The object of the present invention is to provide a refining argon blowing method applied to SPHC steel grades, which effectively solves the problems of easy carburization and silicon increase in the refining process, and reduces the power consumption and slag material in the LF refining process. Consumption and other smelting costs, the fluidity of molten steel is normal, fully meeting the quality requirements of users
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 more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] A refining argon blowing method applied to SPHC steel grades, said method comprising the following steps:
[0018] 1) Ferro-Al-Mn is used for deoxidation when tapping the converter, and after tapping, the temperature of the molten steel in the ladle is controlled at 1600°C;
[0019] 2) Stir the ladle into the station with argon gas for 2 minutes, the argon gas pressure is 1.2Mpa, then adjust the argon gas pressure to 0.4Mpa to measure the temperature and determine the oxygen, feed the aluminum wire alloy according to the measured aluminum content, and control the aluminum content at 0.04%;
[0020] 3) Stir with argon for 2 minutes after feeding the aluminum wire, the argon pressure is 1.2Mpa, after stirring, turn off the argon gas and sedate for 5.5 minutes. After the pressure is adjusted to 0.4Mpa, take samples and feed the calcium wire for soft blowing. The feeding amount of calcium wire is 230m / furnace, and the soft blowing time is 10 minutes;
[0021] 4) Continuous...
Embodiment 2
[0023] A refining argon blowing method applied to SPHC steel grades, said method comprising the following steps:
[0024] 1) Ferro-Al-Mn is used for deoxidation when tapping the converter. After tapping, the temperature of the molten steel in the ladle is controlled at 1620°C;
[0025] 2) Stir the ladle into the station with argon gas for 2.5 minutes, the argon gas pressure is 0.8Mpa, then adjust the argon gas pressure to 0.2Mpa to measure the temperature and determine the oxygen, feed the aluminum wire alloy according to the measured aluminum content, and control the aluminum content at 0.05%;
[0026] 3) Stir with argon gas for 3 minutes after feeding the aluminum wire, the argon gas pressure is 0.8Mpa, turn off the argon gas for sedation for 5 minutes after stirring, and stir for 1 minute under the condition of argon gas pressure of 0.8Mpa after sedation, and put the argon gas After the pressure is adjusted to 0.2Mpa, take samples and feed calcium wire for soft blowing. The...
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 discloses a refining argon blowing method applied to an SPHC steel grade. The method comprises the flowing steps that (1) ferro-manganese-aluminum is used for deoxidizing when steel is sent out from a converter, and after the steel is sent out, molten steel temperature of a steel ladle is controlled to range from 1600 DEG C to 1620 DEG C; (2) after the steel ladle enters a station, argon is pumped, stirring is conducted for 2-2.5 min, the pressure of the argon ranges from 0.8 MPa to 1.2 MPa, then the pressure of the argon is adjusted to range from 0.2 MPa to 0.4 MPa to measure temperature and determine oxygen, feeding aluminum wire alloying is conducted according to measured aluminum content, and the aluminum content is controlled to range from 0.04% to 0.05%; (3) after the feeding aluminum wire alloying is finished, argon stirring is conducted for 2-3 min, and the pressure of the argon ranges from 0.8 MPa to 1.2 MPa; after stirring, the argon is closed, and the steel ladle stands for 5-5.5 min; after the steel ladle stands, the argon is stirred for 1-2 min under the condition that the pressure of the argon ranges from 0.8 MPa to 1.2 MPa, then the pressure of the argon is adjusted to range from 0.2 MPa to 0.4 MPa, sampling is conducted, and feeding calcium wire soft blow is conducted; (4) after soft blow, continuous casting is conducted. By means of the refining argon blowing method applied to the SPHC steel grade, the problem that recarburization, silicon increasing and the like are likely to happen in the process of refining is effectively solved, the smelting cost such as power consumption and slag charge consumption of the LF refining process is lowered, the fluidity of the molten steel is normal, and quality requirements of users are completely met.
Description
technical field [0001] The invention belongs to the technical field of iron and steel metallurgy and steelmaking. Specifically, the invention relates to a refining argon blowing method applied to SPHC steel grades. Background technique [0002] SPHC steel belongs to low-carbon, low-silicon, aluminum-killed steel. The market demand has always been great. Many steel mills at home and abroad are producing it. It is used as deep-processing materials such as stamping and panel forming, such as housings for home appliances and instruments. Therefore, SPHC steel grades are required to have higher stamping performance, and stricter requirements on surface quality and composition. Most of the SPHC steel production enterprises in my country adopt the LF refining process, but this process has problems such as easy increase of carbon and silicon during the refining process, and the cost is high. Therefore, the method of SPHC blowing argon straight up is developed to solve such problems....
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more