Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

La-containing high-strength steel plate and heat treatment technology thereof

A high-strength steel plate and rare earth technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problem of less than 20 kinds of industrial production

Inactive Publication Date: 2013-01-23
INNER MONGOLIA BAOTOU STEEL UNION
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are more than 80 types of rare earth steels, but less than 20 types are actually produced industrially.

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
  • La-containing high-strength steel plate and heat treatment technology thereof
  • La-containing high-strength steel plate and heat treatment technology thereof
  • La-containing high-strength steel plate and heat treatment technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The thickness of the steel plate is 8mm, and its heat treatment process system is: austenitizing temperature 910 ℃, water quenching after holding time for 44 minutes. Sampling test, its mechanical property test value is shown in Table 1:

[0013] Table 1 Mechanical property detection value

[0014]

Embodiment 2

[0016] The thickness of the steel plate is 8mm, and the heat treatment process system is as follows: austenitization temperature 920°C, water quenching after holding time for 44 minutes, low temperature tempering at 200°C, holding time for 5 hours, and air cooling. Sampling and testing, the mechanical properties test values ​​are shown in Table 2. Observed with a metallographic microscope, the metallographic structure is as follows figure 1 As shown, a large number of thin-scale martensitic strengthening phases can be observed. The solid solution rare earth La in steel can significantly reduce lath martensite bundles and improve the hardenability of steel.

[0017] Table 2 Mechanical property detection value

[0018]

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
Login to View More

Abstract

The invention discloses a La-containing high-strength steel plate and a heat treatment technology thereof, and belongs to the technical field of heat treatment of steel materials. The La-containing high-strength steel plate comprises the following chemical components in percentage by weight: 0.14 to 0.30 percent of C, 1.5 to 2.0 percent of Mn, 0.6 to 1.0 percent of Si, less than or equal to 0.015 percent of P, less than or equal to 0.002 percent of S, 0.01 to 0.06 percent of Ti, 0.0005 to 0.0040 percent of B, 0.001 to 0.1 percent of La and the balance of Fe and inevitable impurities. According to the heat treatment technology, the austenitizing temperature is between 900 and 950 DEG C, heat preservation is performed for 0.5 to 3 hours and then water quenching is performed, the tempering temperature is between 190 and 250 DEG C, and the heat preservation time is 1 to 30 hours. The steel plate produced by the heat treatment technology has high mechanical properties, the tensile strength of 1,500 to 1,700 MPa, the yield strength of 1,100 to 1,300 MPa and the elongation of 7 to 15 percent; and moreover, the production cost is low, and steel plates with the thickness of 5 to 25mm can be produced in batches.

Description

technical field [0001] The invention discloses a high-strength steel plate containing rare earth La and a heat treatment process thereof, belonging to the technical field of heat treatment of iron and steel materials. Background technique [0002] At present, there are more than 80 types of rare earth steels, but less than 20 types are actually produced industrially. The activity of the rare earth element lanthanum is second only to alkali metals and alkaline earth metals. Adding lanthanum to pure steel can change the microstructure of steel, change the quality of inclusions and improve the shape of inclusions, and improve the performance of pure steel. Adding appropriate lanthanum element can make the cooling transformation structure of pure steel change significantly. When quenching in ice brine, La makes the γ→α polymorphic transformation proceed in the form of block phase transformation, and the ferrite grain boundary presents irregular morphology. The ferrite grains ar...

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
IPC IPC(8): C22C38/14C21D9/46C21D1/18
Inventor 高志国冯岩青程德富李培德康利明
Owner INNER MONGOLIA BAOTOU STEEL UNION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com