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Steel for rotary supporting ring of wind driven generator

A wind turbine and slewing bearing technology, applied in the field of iron and steel metallurgy, can solve the problems of low plasticity and hardenability, simple and rough heat treatment process, low quality stability, etc., and achieves high hardenability, improved strength and toughness, and improved the effect of strength

Inactive Publication Date: 2014-05-14
锡山区鹅湖慧盾机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of traditional wind power slewing bearing ring forgings are: due to the large range of material composition and physical and chemical indicators allowed, the heat treatment process is simple and rough, resulting in low toughness, plasticity and hardenability of the product, and low quality stability , it is still difficult to meet specific requirements such as strong wind force and +40~-40℃ ambient temperature, safe and stable load bearing, etc.
Although it has made some improvements to the existing technology, its performance still cannot meet the operating conditions in some extremely harsh environments, and there is still room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A steel for the slewing support ring of a wind power generator, the chemical composition of the steel is composed of the following components in weight percentage: C: 0.33, Si: 0.6, Mn: 1.4, P: ≤0.010, S: ≤0.010, Cr : 1.5, Ni: 0.8, Ti: 0.3, Al: 0.02, N: 0.05, [O]: ≤20ppm, [H]: ≤2.0ppm, the balance being Fe and unavoidable impurities.

Embodiment 2

[0015] A steel for the slewing support ring of a wind power generator, the chemical composition of the steel is composed of the following components in weight percentage: C: 0.37, Si: 0.4, Mn: 1.6, P: ≤0.010, S: ≤0.010, Cr : 1.3, Ni: 1.0, Ti: 0.1, Al: 0.04, N: 0.03, [O]: ≤20ppm, [H]: ≤2.0ppm, the balance being Fe and unavoidable impurities.

Embodiment 3

[0017] A steel for the slewing support ring of a wind power generator, the chemical composition of the steel is composed of the following components in weight percentage: C: 0.34, Si: 0.55, Mn: 1.45, P: ≤0.010, S: ≤0.010, Cr : 1.45, Ni: 0.85, Ti: 0.25, Al: 0.025, N: 0.045, [O]: ≤20ppm, [H]: ≤2.0ppm, the balance being Fe and unavoidable impurities.

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PUM

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Abstract

The invention discloses steel for a rotary supporting ring of a wind driven generator. The steel consists of the following chemical components in percentage by weight: 0.33-0.37% of C, 0.4-0.6% of Si, 1.4-1.6% of Mn, P being smaller than or equal to0.010%, S being smaller than or equal to 0.010%, 1.3-1.5% of Cr, 0.8-1.0% of Ni, 0.1-0.3% of Ti, 0.02-0.04% of Al, 0.03-0.05% of N, O being smaller than or equal to 20ppm, H being smaller than or equal to 2.0ppm, and the balance being Fe and inevitable impurities.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a steel for a wind power generator rotary support ring. Background technique [0002] As a clean and renewable energy, wind power is a new emerging industry. The slewing support ring on the pitch of the wind turbine used for wind power equipment and the yaw tower is the load-bearing and transmission part of the wind power equipment, which needs to be used under strong wind force and +40~-40℃ ambient temperature to meet the specific use of bearing load and so on. Requirements; and require that under relatively severe weather conditions, no quality problems can occur within 20 years. The currently used wind power slewing support rings are generally made of billet steel made of 42CrMo4V material in the European standard BS EN10083-1:2006 as the raw material for initial processing, and are made after forging, ring rolling and heat treatment. The disadvantages of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C22C38/58
Inventor 诸金平
Owner 锡山区鹅湖慧盾机械厂