Hot-rolled strip steel for automobile structure and manufacturing method
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 for automobile structure and hot-rolled strip, applied in the field of metallurgy, can solve problems such as easy falling off
Active Publication Date: 2018-12-18
SHOUGANG CORPORATION
View PDF9 Cites 8 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
[0005] The embodiment of the present invention provides a hot-rolled steel strip for automobile structure and its manufacturing method, which is used to solve the problem that the influence of alloying elements on the scale on the surface of the steel strip has not been studied in the prior art, and the scale on the surface of the steel strip with high strength and thick specifications is easily The high ductility of the strip and the te
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
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] The embodiment of the present invention provides a kind of hot-rolled steel strip for automobile structure, please refer to figure 1 , the composition mass percentage of the steel strip is C: 0.030-0.080wt%, Si: 0.15-0.25wt%, Mn: 1.00-1.60wt%, P: ≤0.020wt%, S: ≤0.005wt%, Al: 0.02-0.05wt%, Nb: 0.020-0.060wt%, Ti: 0.01-0.03wt%, V: 0.02-0.06wt%, Cr: 0.10-0.30wt%, and the rest are Fe and unavoidable impurities.
[0029] Further, the mass percentage of a part of the steel strip is C: 0.35-0.07wt%, Mn: 1.0-1.5%wt%, Nb: 0.03-0.45wt%, Ti: 0.01-0.025wt%, V: 0.025wt% 0.04wt%, Cr: 0.15-0.25wt%.
[0030] Further, the mass percentage of a part of the steel strip is C: 0.04-0.07wt%, Mn: 1.1-1.5%wt%, Nb: 0.03-0.05wt%, Ti: 0.015-0.025wt%, V: 0.025wt% 0.045wt%, Cr: 0.15-0.25wt%.
[0031] Further, the mass percentage of a part of the steel strip is C: 0.03-0.07wt%, Mn: 1.0-1.4%wt%, Nb: 0.03-0.04wt%, Ti: 0.01-0.02wt%, V: 0.02-0.02wt%. 0.04wt%, Cr: 0.15-0.2wt%.
[0032] Specifically, ...
Embodiment 2
[0040] This embodiment provides a kind of manufacturing method of hot-rolled steel strip for automobile structure, please refer to Figure 2 to Figure 5 , the method includes:
[0041] Step 110: Continuous casting slabs are obtained by smelting molten steel; the composition mass percentages of the continuous casting slabs are C: 0.030-0.080 wt%, Si: 0.15-0.25 wt%, Mn: 1.00-1.60 wt%, P: ≤0.020wt%, S: ≤0.005wt%, Al: 0.02~0.05wt%, Nb: 0.020~0.060wt%, Ti: 0.01~0.03wt%, V: 0.02~0.06wt%, Cr: 0.10~0.30wt% %, the rest is Fe and unavoidable impurities.
[0042] Specifically, in the examples of the present application, the mass percentages of the component ranges smelted by smelting methods such as converters are C: 0.030-0.080wt%, Si: 0.15-0.25wt%, Mn: 1.00-1.60wt%, P: ≤ 0.020wt%, S: ≤0.005wt%, Al: 0.02~0.05wt%, Nb: 0.020~0.060wt%, Ti: 0.01~0.03wt%, V: 0.02~0.06wt%, Cr: 0.10~0.30wt% , and the rest are Fe and unavoidable impurities. The molten steel was smelted according to the set ...
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
Particle size
aaaaa
aaaaa
Particle size
aaaaa
aaaaa
Thickness
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses hot-rolled strip steel for an automobile structure and a manufacturing method of the hot-rolled strip steel. The strip steel comprises, by mass percent, 0.030wt%-0.080wt% of C,0.15wt%-0.25wt% of Si, 1.00wt%-1.60wt% of Mn, not larger than 0.020wt% of P, not larger than 0.005wt% of S, 0.02wt%-0.05wt% of Al, 0.020wt%-0.060wt% of Nb, 0.01wt%-0.03wt% of Ti, 0.02wt%-0.06wt% of V, 0.10wt%-0.30wt% of Cr and the balance Fe and inevitable impurities. The hot-rolled strip steel is used for solving the technical problems that in the prior art, the influence of alloy elements on scale on the surface of strip steel is not studied, the scale on the surface of the high-strength and thick-specification strip steel is prone to falling off, and the high ductility of the strip steel is contradictory to the high-surface-quality controlled rolling and controlled cooling process; and development of the green environment-friendly hot-rolled strip steel with the thick specification andhigh strength and ductility is achieved, and the technical effects that excellent cold formability is achieved so as to meet the requirement of forming of complex parts, and the scale on the surfaceis not prone to falling off so as to avoid mold surface damage are achieved.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a hot-rolled steel strip for automobile structure and a manufacturing method. Background technique [0002] With the advancement of iron and steel production technology, China's iron and steel industry has basically reached the international level in terms of equipment conditions, dimensional accuracy and performance quality of steel. However, for a long time, there has been a lack of systematic research on the surface quality of hot-rolled steel products with a large quantity and a wide area in China. Surface quality problems of hot-rolled strip steel frequently occur, such as scale is not easy to remove, scale falls off, red rust appears on the surface of the strip, and scale is pressed. Injection and pickling defects have seriously hindered the improvement of the grade of hot-rolled steel products. On the other hand, for some parts with more complex shapes, the conventiona...
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