Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rare earth microalloyed anti-seismic and hot-rolled H-shaped steel and preparation method of H-shaped steel

A technology of micro-alloying and H-beam, applied in the field of metallurgical materials, to prevent the formation and expansion of intergranular cracks, refine the size of grains and precipitates, and have a small fluctuation range

Inactive Publication Date: 2017-11-28
INNER MONGOLIA BAOTOU STEEL UNION
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, ordinary Q235 and Q345 grade hot-rolled H-shaped steel can no longer meet the development needs of steel structure buildings. Therefore, it is necessary to develop H-shaped steel for construction with high strength and high earthquake resistance.

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
  • Rare earth microalloyed anti-seismic and hot-rolled H-shaped steel and preparation method of H-shaped steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The technical solutions of the present invention will be described in detail below with reference to exemplary implementations. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

[0023] The preparation method of rare earth microalloyed shock-resistant hot-rolled H-shaped steel generally includes: molten iron pretreatment→converter smelting→LF refining→VD vacuum refining→continuous casting slab→rolling. Specifically include the following steps:

[0024] 1. Converter smelting;

[0025] Control the w[S]≤0.009% of the molten iron in the converter, increase the tapping temperature of the converter to about 1600°C, and control the amount of slag dropped by the converter.

[0026] 2. LF refining;

[0027] Prolo...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a rare earth microalloyed shock-resistant hot-rolled H-shaped steel, which includes: during the smelting process of the converter, controlling the w[S] of the molten iron in the converter to be ≤ 0.009%, increasing the tapping temperature of the converter to about 1600°C, Control the amount of slag in the converter; extend the refining time of the LF furnace during the LF refining process; during the VD vacuum refining process, the argon blowing time of the VD furnace should not be less than 10 minutes; the casting speed range of the continuous casting machine is 0.80m / min~0.9m / min, The superheat degree of the steel type is less than 25°C; in the rolling process, the heating temperature is 1210-1250°C, the starting rolling temperature is ≤1200°C, and the final rolling temperature is 870-890°C to obtain H-shaped steel. The invention also discloses a rare earth micro-alloyed shock-resistant hot-rolled H-shaped steel. The invention adopts the narrow component design, and the obtained H-shaped steel can meet the requirements of the yield strength and tensile strength of the shock-resistant hot-rolled H-shaped steel.

Description

technical field [0001] The invention relates to a metallurgical material technology, in particular to a rare-earth micro-alloyed shock-resistant hot-rolled H-shaped steel and a preparation method thereof. Background technique [0002] The State Council held an executive meeting of the State Council on November 4, 2015, and clearly proposed to carry out pilot projects of steel structure buildings in shed renovation and earthquake-resistant housing projects, and to expand the use of green building materials. On February 6, 2016, the State Council's "Several Opinions on Further Strengthening the Management of Urban Planning and Construction" proposed that in the development of new construction methods, policy support should be increased, and efforts should be made to make prefabricated buildings account for new construction in about 10 years. The proportion of construction reaches 30%. On March 5, 2016, at the Fourth Session of the Twelfth National People's Congress, the Gover...

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): C22C38/04C22C38/02C22C38/12C22C33/04C21D8/00
CPCC22C38/04C21D8/005C22C33/04C22C38/005C22C38/02C22C38/12
Inventor 宋振东
Owner INNER MONGOLIA BAOTOU STEEL UNION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products