Unlock instant, AI-driven research and patent intelligence for your innovation.

Ultra-high-intensity automobile structural steel and production method thereof

An automotive structural steel and ultra-high-strength technology, applied in the field of high-strength steel production in the metallurgical industry, can solve problems such as low strength, increased vehicle weight, and material waste, and achieve the effect of improving strength and reducing self-weight.

Active Publication Date: 2011-05-25
HEBEI IRON AND STEEL
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low strength, the supporting force can only be increased by increasing the thickness of the steel plate, resulting in waste of materials and increasing the weight of the car

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
  • Ultra-high-intensity automobile structural steel and production method thereof
  • Ultra-high-intensity automobile structural steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Production of 8.0mm thick steel, the chemical composition is as follows: C%: 0.10; Mn%: 1.86; Si%: 0.48; Nb%: 0.057; Ti%: 0.11; Mo%: 0.34; Als%: 0.020; . The starting temperature of the slab is 1190°C, and it enters the rough rolling mill for rough rolling; the intermediate billet is 40mm thick, and enters the hot coil box for uniform temperature; The temperature is 840°C; the coiling temperature is 520°C.

Embodiment 2

[0025] Production of 6.0mm thick steel, the chemical composition is as follows: C%: 0.07; Mn%: 1.80; Si%: 0.42; Nb%: 0.043; Ti%: 0.098; Mo%: 0.29; Als%: 0.028; the rest is iron . The heating temperature of the slab is 1160°C, and it enters the rough rolling mill for rough rolling; the intermediate billet is 35mm thick, and the intermediate billet after rough rolling enters the hot coil box for uniform temperature; 1020°C, the final rolling temperature is 850°C; the coiling temperature is 550°C.

Embodiment 3

[0027] Rolled steel with a thickness of 3.0mm, the chemical composition is as follows: C%: 0.0.05; Mn%: 1.62; Si%: 0.34; Nb%: 0.023; Ti%: 0.073; Mo%: 0.18; Als%: 0.018; The rest is iron. The heating temperature of the slab is 1170°C, and it enters the rough rolling mill for rough rolling; the intermediate billet is 35mm thick, and the intermediate billet after rough rolling enters the hot coil box for uniform temperature; 1050°C, the final rolling temperature is 870°C; the coiling temperature is 580°C.

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

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to ultra-high-intensity automobile structural steel and a production method thereof, which are applicable to middle thin slab production lines and belong to the technical field of high-intensity steel production in metallurgical industry. The invention has the technical scheme that the ultra-high-intensity automobile structural steel comprises the following chemical ingredients in percentage by mass: at most 0.11 percent of C, 1.6 to 2.0 percent of Mn, 0.3 to 0.5 percent of Si, 0.02 to 0.06 percent of Nb, 0.07 to 0.12 percent of Ti, 0.15 to 0.40 percent of Mo, 0.015 to 0.030 percent of Als and the balance Fe. The ultra-high-intensity automobile structural steel is used for manufacturing steel plates of automobile structural elements, the tensile strength is higher than or equal to 800Mpa, the yield strength is higher than or equal to 700, the elongation rate is higher than or equal to 14 percent, and the zero DEG C impact is higher than or equal to 60J. Through optimizing the ingredient design and improving process parameters of each work procedure in the production, the produced steel plate used for manufacturing automobile structural elements can meet various mechanical property indexes of the steel for the automobile, the steel grade can completely meet the performance requirement for manufacturing the ultra-high-intensity automobile structural elementthrough a production method of controlling the coarse milling, the fine milling, the rolling temperature and the like in the thin slab milling process, the intensity of the automobile structural steel is improved, the dead weight of an automobile is greatly reduced, and the design is favorable for energy saving and emission reduction.

Description

technical field [0001] The invention relates to an ultra-high-strength automotive structural steel and a production method thereof, which is suitable for a medium-thin slab production line and belongs to the technical field of high-strength steel production in the metallurgical industry. Background technique [0002] With the development of metallurgical technology, the control precision of various elements in steel is getting higher and higher, and the removal of impurity elements has reached a higher level. These technological advances have made it possible to smelt ultra-high-strength steels; at the same time, the improvement of rolling technology has provided a guarantee for the rolling production of ultra-high-strength steels. At present, the steel plates used in automotive structural parts are mainly Q345B grades, and Q345B is solid solution strengthened by C—Mn, and its chemical composition is: C: 0.16-0.20%, Mn: 1.00-1.55%, Si: 0.20- 0.50%, Als: ≥0.015%, the rest is...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C22C33/06C21D8/02
Inventor 王云阁刘宝喜杨晓江李致清张大勇齐长发尹绍江杨杰杜明山崔宝民禇春光郑兴跃秦坤李月林杜秀珍王占国赵建平
Owner HEBEI IRON AND STEEL