Steel plate with 115 MPa grade yield strength and manufacturing method thereof

A technology of yield strength and manufacturing method, which is applied in the field of steel plate and its manufacturing, can solve the problems of reducing the impact performance of steel plate, long production cycle, and growth of carbonitride, so as to improve low-temperature impact toughness and refine austenite grains , the effect of good low temperature toughness

Inactive Publication Date: 2012-08-01
BAOSHAN IRON & STEEL CO LTD
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heating quenching+tempering and controlled rolling controlled cooling+tempering process adopt the usual heat treatment furnace, the heating speed is slow, and the carbonitri...

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
  • Steel plate with 115 MPa grade yield strength and manufacturing method thereof
  • Steel plate with 115 MPa grade yield strength and manufacturing method thereof
  • Steel plate with 115 MPa grade yield strength and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0063] The specific steps of manufacturing the 1150MPa grade steel plate with yield strength described in the present invention are as follows (see Table 1 for the chemical composition of each grade of steel in this case embodiment 1-6):

[0064] (1) Smelting: Vacuum induction furnace, converter or electric furnace is used for smelting, and after smelting, it is refined and degassed. It should be noted that smelting includes but is not limited to the above-mentioned smelting methods and processing procedures. In the embodiment of this case, a vacuum induction furnace is used for smelting, and chemical spectroscopy is used to determine the final composition;

[0065] (2) Casting: adopt vertical continuous casting, vertical bending continuous casting, arc continuous casting, die casting, directional solidification or electroslag remelting and other methods. It should be noted that casting includes but is not limited to the above-mentioned casting methods. The embodiment of this ...

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 steel plate with the 115 MPa grade yield strength. The steel plate comprises the following chemical compositions in percentage by weight: 0.14-0.17wt% of C, 0.10-0.30wt% of Si, 0.80-1.20wt% of Mn, less than or equal to 0.015wt% of P, less than or equal to 0.003wt% of S, 0.30-0.50wt% of Cr, 0.40-0.70wt% of Mo, 1.1-2.2wt% of Ni, 0.01-0.06wt% of Nb, 0.04-0.06wt% of V, 0.003-0.02wt% of Ti, 0.03-0.07wt% of Al, 0.0006-0.0020wt% of B, the rest of Fe and other inevitable impurities. The steel plate with the 115 MPa grade yield strength also meets the following conditions: C+Mn/2 is greater than or equal to 0.23Ni+0.32Mo+0.49Si+0.17Cr-153.21B and is less than or equal to 0.49Ni+0.64Mo+0.76Si+0.53Cr-132.61B, and Qm is greater than or equal to 2.77 and is less than or equal 4.92. The steel plate has the advantages that the yield strength is greater than or equal to 1150MPa, the tensile strength is greater than or equal to 1200MPa, the charpy impact energy (Akv) (minuse 40 DEG C) is greater than or equal to 60 J, and the carbon equivalent (CEV) is less than or equal to 0.60%, and the steel plate has excellent welding performance.

Description

technical field [0001] The invention relates to an alloy and a manufacturing method thereof, in particular to a steel plate and a manufacturing method thereof. Background technique [0002] High-strength steel plates with good low-temperature toughness are widely used in the manufacture of structural parts of large-scale machinery and equipment, such as tie rods of large-tonnage crawler cranes, push rods of coal mine hydraulic supports with high working resistance, and booms of concrete pump trucks with arm lengths exceeding 47m etc., which all use high-strength steel plates with a yield strength of 900 / 960MPa and above. Large mechanical structural parts are usually connected by welding, so there are high requirements for the strength, toughness and welding performance of the steel plate. With the increasing size of mechanical structures, high-strength steel plates with a yield strength of 1150 MPa and a lower carbon equivalent can meet the needs of large-scale mechanical e...

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): C22C38/54C21D8/02C21D1/18
Inventor 赵四新焦四海姚连登
Owner BAOSHAN IRON & STEEL CO LTD
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap