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

ESP-based high-strength hot-forming steel and method

A hot forming, high-strength technology, used in metal rolling and other directions, can solve the problems of poor product surface quality, high production energy consumption, long process flow, etc., and achieve the effects of good surface quality, improved toughness, and high dimensional accuracy.

Active Publication Date: 2022-02-18
TANGSHAN IRON & STEEL GROUP +1
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the present invention provides a high-strength hot-forming steel and method based on ESP to solve the problems of long process flow, poor product surface quality, and large production energy consumption in the traditional hot rolling process.

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
  • ESP-based high-strength hot-forming steel and method
  • ESP-based high-strength hot-forming steel and method
  • ESP-based high-strength hot-forming steel and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0021] The chemical composition and mass percentage of the high-strength hot-forming steel produced based on ESP in the present invention are C: 0.20-0.34%, Mn: 1.20-1.50%, Si: 0.22-0.32%, P≤0.02%, S≤0.006 %, Als: 0.02-0.08%, Mo≤0.2%, Cr: 0.20-0.30%, Nb: 0.03-0.10%, N≤0.005%, and the rest are Fe and unavoidable residual elements.

[0022] The method of the present invention is based on the high-strength hot-forming steel produced by ESP, including molten iron desulfurization, electric furnace or converter smelting, refining, ESP continuous casting and rolling process; ESP continuous casting and rolling process includes continuous casting, rough rolling, induction heating, Finish rolling, laminar cooling, high-speed flying shear, coiling steps. In the ESP continuous casting and rolling process, the casting speed is 3-7m / min, the thickness of the continuous casting slab is 70-110mm; the exit temperature of rough rolling is ≥900℃, and the thickness of the intermediate slab is 8-1...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

A high-strength hot-forming steel and method based on ESP production, the chemical composition and weight percentage of the hot-forming steel are: C: 0.20-0.34%, Mn: 1.20-1.50%, Si: 0.22-0.32% , P≤0.02%, S≤0.006%, Als: 0.02~0.08%, Mo≤0.2%, Cr: 0.20~0.30%, Nb: 0.03~0.10%, N≤0.005%, the rest is Fe and unavoidable residues element. The method includes molten iron desulfurization, smelting, refining, and ESP continuous casting and rolling processes; the ESP continuous casting and rolling process sequentially includes the steps of continuous casting, rough rolling, induction heating, finish rolling, laminar cooling, high-speed flying shear, and coiling. The invention has short technological process, good product surface quality, uniform structure and stable performance, and can stably produce 0.8mm ultra-thin strip steel.

Description

technical field [0001] The invention belongs to the technical field of metal material processing and forming, and in particular relates to a high-strength hot-forming steel produced based on ESP and a method thereof. Background technique [0002] At present, hot stamping steel is widely used in the production of automobile A-pillar, B-pillar, bumper, roof frame, underbody frame and door anti-collision bar. Its forming process is to heat the sheet to a fully austenitized state, quickly transfer it to a mold with a uniform cooling system, and perform high-speed stamping for forming, and at the same time perform cooling and quenching treatment to obtain ultra-high-strength steel parts with uniform martensitic structure. . Its advantage is that the formability of high-temperature state steel is good, and complex components can be punched and formed, while the effect of springback is eliminated, and the parts have high precision and good quality. The alloy concept for hot-forme...

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 Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/22C22C38/26B21B1/46C21D8/02C21D1/18
CPCC22C38/04C22C38/02C22C38/06C22C38/22C22C38/26B21B1/463C21D8/0226C21D8/0247C21D1/18C21D2211/005C21D2211/009
Inventor 冯晓勇邝霜李建设刘靖宝王朝刘丽萍李梦龙石晓伟毛文文
Owner TANGSHAN IRON & STEEL GROUP