High-strength and high-toughness hot-rolled magnet yoke steel with yield strength greater than or equal to 650 MPa and production method

A yield strength and high-strength technology, which is applied in the field of high-strength and high-toughness hot-rolled yoke steel with yield strength ≥ 650MPa and the production field to achieve a good matching effect

Active Publication Date: 2016-04-20
武汉钢铁有限公司
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this level of toughness steel can no longer adapt to and meet the current generator requirements of large-scale hydropower projects, so it is urgent to research and develop high-strength and high-toughness yoke steel

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
  • High-strength and high-toughness hot-rolled magnet yoke steel with yield strength greater than or equal to 650 MPa and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention is described in detail below:

[0031] Table 1 is the value list of the chemical composition of steel of the present invention and comparative example;

[0032] Table 2 is a list of main process parameter values ​​and performance testing of the steel of the present invention and comparative examples.

[0033] Each implementation of the present invention is produced according to the following steps:

[0034] 1) Casting into slabs after molten iron desulfurization, converter top-bottom composite blowing, and vacuum treatment;

[0035] 2) Heating the slab, the heating temperature is 1230-1280°C, and the soaking time is 80-100min;

[0036] 3) Carry out rough rolling, and control the end temperature of rough rolling not lower than 1050°C;

[0037] 4) Carry out finish rolling, and control the finish rolling temperature at 800-850°C;

[0038] 5) Carry out laminar flow cooling, and the final cooling temperature is 600-650°C;

[0039] 6) Carry out coil...

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
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to view more

Abstract

A high-strength and high-toughness hot-rolled magnet yoke steel with yield strength greater than or equal to 650 MPa comprises the following components in percentage by weight: 0.01-0.03% of C, less than or equal to 0.15% of Si, 1.45-1.75% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.04-0.08% of Ti, 0.01-0.02% of Nb, 0.02-0.10% of Als, and less than or equal to 0.010% of N. The production method comprises the following production steps: pouring after molten iron desulphurization, converter combined blowing and vacuum treatment; heating slabs; roughly rolling; precisely rolling; carrying out laminar cooling; and coiling. The yield strength of the magnet yoke steel is greater than or equal to 650 MPa, the tensile strength is greater than or equal to 750 MPa, the elongation is greater than or equal to 13%, the impact energy KV2 is greater than or equal to 80 J at the temperature of minus 20 DEG C, the magnetic induction performance B50 is greater than or equal to 1.50 T, and requirements of high-strength and high-magnetic-induction-performance steels for high-unit-capacity ultra-large hydro-generator rotor magnet yokes can be met.

Description

technical field [0001] The invention relates to a hydraulic generator rotor yoke steel and a production method thereof, in particular to a high-strength and high-toughness hot-rolled yoke steel with yield strength ≥ 650 MPa and a production method thereof. Background technique [0002] With the implementation of the "Western Development" strategy and the "West-to-East Electricity Transmission" strategy determined by our country, and in accordance with the national guideline of "vigorously developing hydropower", a large number of large-scale hydropower projects will start construction in the next few decades. With the development of the hydropower industry, the performance requirements for the yoke steel plate used in the key part of the rotor yoke of the hydro-generator have also increased from simple high strength to high toughness, especially in severe cold regions. The service environment of steel is harsh, and once the material breaks during the operation of the rotor, ...

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): C22C38/04C22C38/14C22C38/12C22C38/06C21D8/12
CPCC21D8/1222C22C38/04C22C38/06C22C38/12C22C38/14C21D2211/001C21D2211/005
Inventor 宋畅陶军晖杜明马玉喜高智平郭斌徐进桥刘昌明王俊霖
Owner 武汉钢铁有限公司
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