Austenite low-permeability steel with lower yield strength not less than 810MPa and production method
A technology with yield strength and low magnetic permeability, which is applied to austenitic low magnetic permeability steel with lower yield strength ≥ 810MPa and the production field, which can solve the problems of many alloy elements, low mechanical properties, complex process, etc., and achieve simple chemical composition , Small size, easy process parameters
Inactive Publication Date: 2013-12-25
武汉钢铁有限公司
View PDF3 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The present invention aims at the deficiencies in the prior art that there are many alloying elements, high cost, low mechanical properties, and relatively complicated process, and provides a steel plate with less alloying elements, simple process, low cost, lower yield strength ReL≥810MPa, relatively magnetic Austenitic low magnetic permeability steel with conductivity not greater than 1.005 and production method
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
[0028] The present invention is described in detail below:
[0029] Table 1 is the value list of each embodiment of the present invention and comparative example;
[0030] Table 2 is the main process parameters and performance list of each embodiment of the present invention and comparative examples.
[0031] Each embodiment of the present invention is produced according to the following steps:
[0032] Its steps:
[0033] 1) Electric furnace smelting, ladle refining and vacuum treatment;
[0034] 2) Carry out bottom casting to form a billet;
[0035]3) Heating the die-casting slab, the heating temperature is 1250-1350 ℃, and keep it warm at this temperature for 4-6 hours;
[0036] 4) Rolling: control the starting rolling temperature at 1180-1220°C, and control the final rolling temperature at 1050-1130°C;
[0037] 5) Rapid cooling to room temperature at a cooling rate of 30-100°C / min;
[0038] 6) Perform tempering treatment, the tempering temperature is 600-680° C., and...
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
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides austenite low-permeability steel with lower yield strength not less than 810MPa. The steel comprises the following components by weight percent: 0.11-0.13% of C, 0.35-0.49% of Si, 18.50-21.50% of Mn, less than 0.020% of P, not more than 0.015% of S and 1.15-2.55% of Ti. A production method of the steel comprises the following steps of carrying out electric furnace smelting, ladle refining and vacuum treatment; carrying out bottom pouring and die casting to form blanks; heating the die casting blanks; rolling the die casting blanks; quickly cooling the die casting blanks to the room temperature; carrying out tempering treatment. The steel has simple chemical components and easily controlled technological parameters, is low in cost, is suitable for scale production, has low magnetism and high strength, namely lower yield strength ReL of steel plates being not less than 810MPa and has relative permeability not more than 1.005. Electrical equipment produced with the steel, such as transformers and generators has small volume and high efficiency.
Description
technical field [0001] The invention relates to a high-strength low-magnetic steel and a production method, in particular to an austenitic low-magnetic-permeability steel with a lower yield strength ≥ 810 MPa and a production method suitable for manufacturing projects such as transformers, generators, and nuclear power plants. Background technique [0002] Gas turbine generator retaining rings, transformer pull plates, and nuclear power retaining rings are all made of low magnetic steel. Low magnetic steel is also a must for superconducting energy storage equipment, magnetic fluid power generation equipment, superconducting generators, superconducting power transmission, and electromagnetic propulsion ships. Indispensable structural material. With the progress of society and the continuous development of economy, the demand for low magnetic steel is increasing. Currently widely used low magnetic high manganese steel series such as 20Mn23AlV, etc., although the magnetic perm...
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 Applications(China)
IPC IPC(8): C22C38/14C21D8/02
CPCY02P10/20
Inventor 陈颜堂宋畅郭斌
Owner 武汉钢铁有限公司