Supercharge Your Innovation With Domain-Expert AI Agents!

Steel with high strength, low-temperature impact resistance and weatherability for wind-powered pivoting support and production process thereof

A technology of slewing bearing and production process, applied in the field of alloy structural steel, to achieve excellent performance, low yield ratio, and improve the effect of low temperature impact energy

Active Publication Date: 2013-03-20
JIANGSU SHAGANG GROUP HUAIGANG SPECIAL STEEL CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-strength, low-temperature shock-resistant, and weather-resistant steel for wind power slewing bearings, and at the same time provide the production process of this steel, which not only solves the problem that the 42CrMo alloy structural steel in GB / T3077 cannot meet the - The problem of Akv≥27j at 40°C, and compared with the existing technology, it has low cost, high strength of steel, good plasticity, weather resistance, and low temperature impact performance

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 with high strength, low-temperature impact resistance and weatherability for wind-powered pivoting support and production process thereof
  • Steel with high strength, low-temperature impact resistance and weatherability for wind-powered pivoting support and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepared by the following production process:

[0033] (1) Converter smelting, smelting in a top-bottom double-blowing converter of more than 60 tons, adding molten iron and scrap steel, the converter realizes pre-de-P, retaining slag and leaving slag to prevent re-P, tapping for pre-deoxidation alloying and composition initial tune;

[0034] (2) LF refining, making high-basic slag desulphurization and deoxygenation in an LF furnace of more than 60 tons, sufficient soft blowing time and argon blowing intensity to ensure the effect of removing inclusions;

[0035] (3) RH, after LF refining, can also be used before LF refining, use more than 60 tons of RH, keep it under high vacuum for more than 25 minutes, realize vacuum degassing and remove inclusions, and ensure that [H]≤0.00015%, [O]≤0.0015% to obtain higher cleanliness of molten steel;

[0036] (4) Continuous casting, using the R14m 6-machine 6-strand continuous casting machine produced by Danieli in Italy. During ...

Embodiment 2

[0042] C 0.42%, Si 0.26%, Mn 0.68%, Cr 1.02%, Ni0.01%, Mo 0.23%, V 0.005%, Nb 0.002%, Al 0.036%, S 0.001%, P 0.011%, B 0.0003%, Cu 0.01%, Sb 0.0003%, Sn 0.0012%, As 0.003%, [O] 0.0010%, [N] 0.0048%, [H] 0.00010%, the rest is Fe.

[0043] After the φ500m round billet is forged and processed, the V-notch impact energy AKv=6J at -40°C.

[0044] All the other implementations are as in Example 1.

Embodiment 3

[0046] C 0.43%, Si 0.27%, Mn 0.69%, Cr 1.01%, Ni 0.02%, Mo 0.24%, V 0.004%, Nb 0.002%, Al 0.034%, S 0.001%, P 0.011%, B 0.0003%, Cu 0.01 %, Sb 0.0003%, Sn 0.0012%, As 0.003%, [O] 0.0011%, [N] 0.0043%, [H] 0.00012%, and the rest is Fe.

[0047] After the φ500mm round billet is forged and processed, the V-notch impact energy AKv=56J at -40°C.

[0048] All the other implementations are as in Example 1.

[0049] The Ni, V, and Nb elements in the above three embodiments are brought in by steel scrap. The present invention limits the Ni, V, and Nb brought in by steel scrap, wherein Ni≤0.30%, V≤0.10%, and ≤0.05%.

[0050] For the steels obtained in the above three examples, after the round billets are forged and processed, the low-temperature impact energy measured is the performance index of the actual products used by Xuzhou Rothe Erde Slewing Bearing Co., Ltd.

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 steel with high strength, low-temperature impact resistance and weatherability for a wind-powered pivoting support, which comprises the following chemical components in percentage by weight: 0.41-0.44 percent of C, 0.17-0.37 percent of Si, 0.60-0.80 percent of Mn, 0.90-1.20 percent of Cr, 0.20-0.30 percent of Mo, not more than 0.020 percent of P, not more than 0.015 percent of S, 0.015-0.045 percent of Al, not more than 0.20 percent of Cu, not more than 0.003 percent of Sb, not more than 0.002 percent of Sn, not more than 0.010 percent of As, not more than 0.0010 percent of B, not more than 15 ppm of O, not more than 1.5 ppm of H, not more than 70 ppm of N and the balance of Fe. The production process of the steel comprises the following steps of: smelting in a conventional converter, refining in a refining device, microalloying barium at a later refining period and finally deoxidizing, wherein RH (Rhodium) is adopted for degassing and removing impurities before refining or after refining. The invention has reasonable component design and advanced process, and enables the materials to have not only the characteristics of high strength, low-temperature impact resistance, excellent weatherability, and the like, but also the advantages of noble resource saving and low cost.

Description

Technical field: [0001] The invention relates to alloy structural steel in the iron and steel industry, in particular to the design and production process of 42CrMo4 steel for wind power slewing bearings with high strength, low temperature impact resistance and weather resistance. Background technique: [0002] Since wind turbines are mostly located in the northern and coastal areas of China, wind power slewing ring bearings are generally installed on wind turbines with a height of more than 100 meters. When the wind turbine starts to yaw, the yaw acceleration will generate a shock moment. The higher the yaw speed, the greater the acceleration, because the moment of inertia is very large, which doubles the already large impact moment. In addition to the impact moment, if the wind turbine deflects during the movement, the yaw slewing bearing will also bear a considerable gyro moment, which will easily cause the fatigue failure of the yaw bearing. In addition, since the wind...

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): C22C38/60
Inventor 王忠英张银生仝太钦包石磊尹修刚张庆武吴朝兵石可伟
Owner JIANGSU SHAGANG GROUP HUAIGANG SPECIAL STEEL CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com