Steel for automobile rim having tensile strength equal to or greater than 380MPa and production method of steel
A tensile strength, 380mpa technology, applied in the steel and production fields of automobile rims with a tensile strength of ≥380MPa, can solve problems such as poor formability and achieve the effect of good formability
Active Publication Date: 2015-01-21
武汉钢铁有限公司
View PDF12 Cites 15 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0011] The main purpose of the present invention is to overcome the existing technology that cannot meet the requirements of the development of the automobile industry, that is, the poor formability, and only the elongation rate is used to reflect the pros and cons of the formability of the steel plate, and to provide a
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
[0035] The present invention is described in detail below:
[0036] Table 1 is the composition value list of each embodiment of the present invention and comparative example;
[0037] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;
[0038] Table 3 is a list of performance testing conditions of each embodiment of the present invention and comparative examples.
[0039] Each embodiment of the present invention is produced according to the following steps:
[0040] 1) Converter smelting;
[0041]2) Treat in LF furnace, and add Si—Ca wire according to 0.65~0.75Kg / ton of steel, and the adding speed is 250~300m / min;
[0042] 3) Continuous casting and heating of the billet, and control: the temperature of the preheating section is 350~450°C, the temperature of the first heating section is 950~1050°C, the temperature of the second heating section is 1190~1250°C, and the temperature of the soaking section is at 1180~1...
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 relates to steel for an automobile rim having tensile strength equal to or greater than 380MPa. The steel comprises the following chemical components in percentage by weight: 0.045-0.075% of C, less than or equal to 0.05% of Si, 0.45-0.75% of Mn, less than or equal to 0.010% of P, less than or equal to 0.008% of S, 0.015-0.050% of Als and less than or equal to 0.005% of N. The production method comprises the following steps: smelting in a converter; treating in an LF (Ladle Furnace); carrying out continuous casting to obtain a casting billet and heating the casting billet; carrying out hot rolling; rapidly cooling; coiling; finishing and carrying out subsequent steps. According to the steel, under the condition of simple components, the yield strength equal to or greater than 240MPa can be ensured, the tensile strength is not less than 380MPa and the elongation A is improved from the existing 30% to not less than 40%; the hole expansion rate is improved from the existing not more than 150% to equal to or greater than 165% and the steel is more conducive to achieving good formability.
Description
technical field [0001] The invention relates to steel for automobiles and a production method thereof, in particular to steel for rims of automobiles with a tensile strength greater than or equal to 380 MPa and a production method thereof. Background technique [0002] With the rapid development of my country's automobile industry, the design and manufacturing level of wheels, one of the main components of automobiles, has also been continuously upgraded. Modern automobile wheels not only require durability and beautiful appearance, but also for the consideration of energy saving and consumption reduction, more and more complex designs are adopted. The processing process is long and the steel deformation passes many times. Therefore, the steel used for manufacturing wheels is required to have Good forming performance can meet the complex deformation requirements of the rim during the rolling forming deformation process. In the manufacturing process of the rim, after the rou...
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 IPC IPC(8): C22C38/06C21D8/00
Inventor 赵江涛刘斌王立新刘永前周祖安彭涛刘登文杨海林
Owner 武汉钢铁有限公司