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Flange for wind power drum and manufacturing technique thereof

A manufacturing process and technology of using flanges, applied in the direction of flange connection, pipe/pipe joint/pipe fitting, passing element, etc., can solve the problem of low tensile strength and high yield strength, not meeting the requirements of wind tower use, flange The problem of low corrosion resistance is to achieve the effect of improved toughness and low temperature impact performance, obvious reduction of defects and consistent performance

Active Publication Date: 2013-04-17
WUXI HUAERTAI MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Flange materials generally include: carbon steel, alloy steel and stainless steel; wind tower flanges require good corrosion resistance, high tensile strength and high yield strength, and small surface roughness; Due to the limitation of composition and heat treatment process, the corrosion resistance of the flange is not high, the tensile strength and high yield strength are not high, the surface roughness is high, and there are problems such as loose structure, pores, trachoma, etc., which do not meet the requirements of the wind tower. Use requirements, or short service life

Method used

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  • Flange for wind power drum and manufacturing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The flange for the wind power tower of the present embodiment, the mass percent of its chemical composition is: C: 0.15%, Si: 0.65%, Mn: 0.65%, Ni: 6%, Cr: 4%, Nb: 0.85%, Cu: 0.35%, N: 0.05%, Mo: 0.06%, Al: 0.7%, S: 0.02%, Ti: 0.09%, V: 0.01%, B: 0.002%, lanthanide rare earth: 1%, the balance is Fe; The mass percentages of lanthanide rare earth components are: lanthanum: 25%, cerium: 19%, samarium: 5%, neodymium: 13%, gadolinium: 11%, praseodymium: 10%, dysprosium: 9%, and other lanthanide elements: 8%.

[0025] The manufacturing process of the flange for wind power tower in this embodiment is carried out according to the following procedures: billet blanking-forging-forging size and surface inspection-heat treatment-mechanical rough machining-ultrasonic inspection-mechanical performance test-mechanical finishing to the required shape and size-clean coating; among them, billet blanking, forging, forging size and surface inspection, mechanical rough machining, ultrasoni...

Embodiment 2

[0032] The wind power tower flange of the present embodiment, the mass percent of its chemical composition is: C: 0.22%, Si: 0.60%, Mn: 0.75%, Ni: 5%, Cr: 5%, Nb: 0.65%, Cu: 0.25%, N: 0.07%, Mo: 0.05%, Al: 0.9%, S: 0.02%, Ti: 0.08%, V: 0.03%, B: 0.002%, lanthanide rare earth: 2%, the balance is Fe; The mass percentages of lanthanide rare earth components are: lanthanum: 35%, cerium: 16%, samarium: 10%, neodymium: 10%, gadolinium: 5%, praseodymium: 15%, dysprosium: 7%, and other lanthanide elements: 2%.

[0033] The manufacturing process of the flange for wind power tower in this embodiment is carried out according to the following procedures: billet blanking-forging-forging size and surface inspection-heat treatment-mechanical rough machining-ultrasonic inspection-mechanical performance test-mechanical finishing to the required shape and size-clean coating; among them, billet blanking, forging, forging size and surface inspection, mechanical rough machining, ultrasonic inspec...

Embodiment 3

[0040]The wind power tower flange of the present embodiment, the mass percent of its chemical composition is: C: 0.19%, Si: 0.55%, Mn: 0.70%, Ni: 8%, Cr: 6%, Nb: 0.75%, Cu: 0.45%, N: 0.06%, Mo: 0.07%, Al: 0.8%, S: 0.03%, Ti: 0.09%, V: 0.04%, B: 0.003%, lanthanide rare earth: 2%, the balance is Fe; The mass percentages of lanthanide rare earth components are: lanthanum: 26%, cerium: 18%, samarium: 9%, neodymium: 12%, gadolinium: 12%, praseodymium: 13%, dysprosium: 8%, and other lanthanide elements: 2%.

[0041] The manufacturing process of the flange for wind power tower in this embodiment is carried out according to the following procedures: billet blanking-forging-forging size and surface inspection-heat treatment-mechanical rough machining-ultrasonic inspection-mechanical performance test-mechanical finishing to the required shape and size-clean coating; among them, billet blanking, forging, forging size and surface inspection, mechanical rough machining, ultrasonic inspect...

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Abstract

The invention provides a flange for a wind power drum, and a manufacturing technique thereof. The flange comprises the chemical compositions in percentage by weight: 0.15-0.22 percent of C, 0.55-0.65 percent of Si, 0.65-0.75 percent of Mn, 5-8 percent of Ni, 4-6 percent of Cr, 0.65-0.85 percent of Nb, 0.25-0.45 percent of Cu, 0.05-0.07 percent of N, 0.05-0.07 percent of Mo, 0.7-0.9 percent of Al, 0.02-0.03 percent of S, 0.08-0.09 percent of Ti, 0.01-0.04 percent of V, 0.002-0.003 percent of B, 1-2 percent of rare earth lanthanide series and the balance of Fe. According to the invention, with the heating processing procedures of two-time normalization and two-time tempering, the excellent corrosion resistance of the flange is ensured, and meanwhile, high tensile strength and high yield strength are achieved; and the flange is ensured to have smaller surface roughness, more uniform and stable tissue, and less air holes and sand holes.

Description

technical field [0001] The invention relates to a flange and a manufacturing process, in particular to a flange for a wind tower and a manufacturing process. Background technique [0002] Flange is otherwise known as flange or flange. Flanges are parts that connect the pipes to each other and are connected to the pipe ends; they are also useful for flanges on equipment inlets and outlets, And can be used as connection between two equipments, example reducer flanges. Flange connection or flange joint refers to the detachable connection of flange, gasket and bolt as a group of combined sealing structure. Pipe flange refers to the flange used for piping in pipeline installations. Upper refers to the inlet and outlet flanges of the equipment. There are holes in the flange, and the bolts tightly connect the two flanges. The flanges are sealed with gaskets. Flanges are divided into threaded (screw connection) flanges, welding flanges and clip flanges. [0003] Flange material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54F16L23/00
Inventor 李忠云
Owner WUXI HUAERTAI MACHINERY MFG
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