CN103045960B - Flange for wind power drum and manufacturing technique thereof - Google Patents
Flange for wind power drum and manufacturing technique thereof Download PDFInfo
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- CN103045960B CN103045960B CN201210561223.6A CN201210561223A CN103045960B CN 103045960 B CN103045960 B CN 103045960B CN 201210561223 A CN201210561223 A CN 201210561223A CN 103045960 B CN103045960 B CN 103045960B
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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
The present invention relates to a kind of flange and manufacturing process, specifically a kind of wind power tower cylinder flange and manufacturing process.
Background technology
Flange (Flange), is again ring flange or flange.Flange makes pipe and the interconnective part of pipe, is connected to pipe end; Also the flange that the equipment that is used in is imported and exported is had, for the connection between two equipment, as step-down gear flange.Flange joint or flanged coupling, refer to and be interconnected releasable connection as one group of combined sealing structure by flange, pad and bolt three, pipe flange means the flange of pipe arrangement in plumbing installation, is used in import and export flange equipment meaning equipment.Perforation on flange, bolt makes two flanges be close to.Liner containment is used between flange.Flange divides be threaded (screwed connection) flange and welding flange and clip flange.
The material of flange generally has: carbon steel, steel alloy and stainless steel; Wind power tower cylinder flange requires that corrosion resistance is good, and tensile strength and high-yield strength require higher, and surfaceness is little; And in high prior art, due to the restriction of composition and thermal treatment process, thus cause flange corrosion resistance not high, tensile strength and high-yield strength are not high, surfaceness is higher, and there is the problems such as tissue looseness, pore, trachoma, do not meet the service requirements of wind power tower cylinder, or work-ing life is shorter.
Summary of the invention
Technical problem to be solved by this invention is:
How to ensure that flange has high-tensile and high-yield strength while having outstanding corrosion resistance;
How to ensure that flange has less surfaceness, organize more uniform and stable, few pore and trachoma.
The technical scheme that the present invention solves above technical problem is:
A kind of wind power tower cylinder flange, the mass percent of its chemical composition is: C:0.15-0.22%, Si:0.55-0.65%, Mn:0.65-0.75%, Ni:5-8%, Cr:4-6%, Nb:0.65-0.85%, Cu:0.25-0.45%, N:0.05-0.07%, Mo:0.05-0.07%, Al:0.7-0.9%, S:0.02-0.03%, Ti:0.08-0.09%, V:0.01-0.04%, B:0.002-0.003%, lanthanide rare: 1-2%, surplus is Fe.
The manufacturing process of wind power tower cylinder flange, is undertaken by following operation: steel billet blanking-forging-forging size and surface inspection-thermal treatment-mechanical roughing-ultrasonic testing-mechanicl test-machine finshing are to desired shape and size-end treatment; Heat treatment step adopts double normalizing and double tempering, and normalizing temperature is greater than second time normalizing temperature for the first time, and tempering temperature is greater than second time tempering temperature for the first time;
First time normalizing: adopt zone heating, first paragraph Heating temperature is 700-750 DEG C, is incubated 10-15min after temperature, and second segment Heating temperature is 850-880 DEG C, is incubated 35-40min after temperature, then carries out second time normalizing after air cooling 10-15min;
Second time normalizing: adopt zone heating, first paragraph Heating temperature is 600-650 DEG C of heating, is incubated 15-18min after temperature, and second segment Heating temperature is 660-690 DEG C of heating, and be incubated 20-30min after temperature, then water-cooled is to room temperature;
First time tempering: tempering temperature 550-640 DEG C, is incubated 10-15min, then carries out second time tempering after air cooling 10-15min after temperature;
Second time tempering: tempering temperature 500-540 DEG C, after temperature, be incubated 15-20min, then water-cooled is to room temperature.
In above operation: steel billet blanking, forging, forging size and surface inspection, mechanical roughing, ultrasonic testing, mechanicl test, machine finshing all use existing conventional process to desired shape and size and end treatment.
The technical scheme that the present invention limits further is:
Aforesaid wind power tower cylinder flange, the constituent mass per-cent of lanthanide rare is: lanthanum: 25-35%, cerium: 16-19%, samarium: 5-10%, neodymium: 10-13%, gadolinium: 5-12%, praseodymium: 10-15%, dysprosium: 7-9%, all the other lanthanon: 2-8%, above each component sum is 100%.
Advantage of the present invention is:
The present invention passes through the restriction of composition and processing parameter, particularly add appropriate lanthanide series rare-earth elements, and the heat treatment step of double normalizing+double tempering, both the precipitation of carbide at intergranular had been avoided, prevent again carburizing and the nitriding of heat treatment process simultaneously, ensure that the corrosion resistance of material; The present invention adopts double normalizing+double tempering technique, and make the defects such as the banded structure of flange alleviate obviously after double normalizing, structure refinement is even; Double tempering after normalizing, organizes more uniform and stable, and crystal grain more refinement, the tensile strength of flange, yield strength, toughness and low temperature impact properties are greatly improved.First time, normalizing temperature was higher than second time normalizing temperature, made second time normalizing not destroy the effect of first time normalizing, made tissue thinning effect more obvious; Zone heating is taked in normalizing, and second segment heating can reduce the difference of the temperature in surface and heart portion on the basis of first paragraph heating, makes thickness of flange direction fine microstructures even; First time, tempering temperature was higher than second time tempering temperature, make second time tempering not destroy the effect of first time tempering, make the more refinement of thickness of flange direction crystal grain, reduce the difference of the temperature in surface and heart portion further, thus reached unanimity to heart portion performance in surface, seldom there is pore and trachoma.
In a word, the present invention takes zone heating, and that effectively can shorten high temperature section adds the time, makes grain refinement effect more obvious, and the grain fineness number of organizing of thickness direction is reached unanimity; Adopt double normalizing, and first time normalizing temperature higher, can crystal grain thinning, improve intensity and toughness simultaneously, can alleviate or eliminate the defects such as banded structure, improve flange entirety impact property; Double tempering after normalizing, and tempering temperature is higher for the first time, organize more uniform and stable, low temperature impact properties improves further, and reaching unanimity to heart portion performance in surface, seldom occurs pore and trachoma.
Specific performance of the present invention can see the following form:
Table 1 the present invention contrasts with conventional flange performance index
Embodiment
embodiment 1
The wind power tower cylinder flange 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: 1%, surplus is Fe; The constituent mass per-cent of lanthanide rare is: lanthanum: 25%, cerium: 19%, samarium: 5%, neodymium: 13%, gadolinium: 11%, praseodymium: 10%, dysprosium: 9%, all the other lanthanon: 8%.
The manufacturing process of the wind power tower cylinder flange of the present embodiment, is undertaken by following operation: steel billet blanking-forging-forging size and surface inspection-thermal treatment-mechanical roughing-ultrasonic testing-mechanicl test-machine finshing are to desired shape and size-end treatment; Wherein, steel billet blanking, forging, forging size and surface inspection, mechanical roughing, ultrasonic testing, mechanicl test, machine finshing all use existing conventional process to desired shape and size and end treatment; Wherein heat treatment step adopts double normalizing and double tempering, and normalizing temperature is greater than second time normalizing temperature for the first time, and tempering temperature is greater than second time tempering temperature for the first time;
First time normalizing: adopt zone heating, first paragraph Heating temperature is 700 DEG C, is incubated 15min after temperature, and second segment Heating temperature is 850 DEG C, is incubated 40min after temperature, then carries out second time normalizing after air cooling 10min;
Second time normalizing: adopt zone heating, first paragraph Heating temperature is 600 DEG C of heating, is incubated 18min after temperature, and second segment Heating temperature is 660 DEG C of heating, and be incubated 30min after temperature, then water-cooled is to room temperature;
First time tempering: tempering temperature 550 DEG C, is incubated 15min after temperature, then carries out second time tempering after air cooling 10min;
Second time tempering: tempering temperature 500 DEG C, be incubated 15min after temperature, then water-cooled is to room temperature.
The present embodiment flange after testing, reaches performance index listed by table 1.
embodiment 2
The wind power tower cylinder 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: 2%, surplus is Fe; The constituent mass per-cent of lanthanide rare is: lanthanum: 35%, cerium: 16%, samarium: 10%, neodymium: 10%, gadolinium: 5%, praseodymium: 15%, dysprosium: 7%, all the other lanthanon: 2%.
The manufacturing process of the wind power tower cylinder flange of the present embodiment, is undertaken by following operation: steel billet blanking-forging-forging size and surface inspection-thermal treatment-mechanical roughing-ultrasonic testing-mechanicl test-machine finshing are to desired shape and size-end treatment; Wherein, steel billet blanking, forging, forging size and surface inspection, mechanical roughing, ultrasonic testing, mechanicl test, machine finshing all use existing conventional process to desired shape and size and end treatment; Wherein heat treatment step adopts double normalizing and double tempering, and normalizing temperature is greater than second time normalizing temperature for the first time, and tempering temperature is greater than second time tempering temperature for the first time;
First time normalizing: adopt zone heating, first paragraph Heating temperature is 720 DEG C, is incubated 12min after temperature, and second segment Heating temperature is 860 DEG C, is incubated 36min after temperature, then carries out second time normalizing after air cooling 12min;
Second time normalizing: adopt zone heating, first paragraph Heating temperature is 630 DEG C of heating, is incubated 16min after temperature, and second segment Heating temperature is 670 DEG C of heating, and be incubated 25min after temperature, then water-cooled is to room temperature;
First time tempering: tempering temperature 600 DEG C, is incubated 13min after temperature, then carries out second time tempering after air cooling 12min;
Second time tempering: tempering temperature 530 DEG C, be incubated 17min after temperature, then water-cooled is to room temperature.
The present embodiment flange after testing, reaches performance index listed by table 1.
embodiment 3
The wind power tower cylinder 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: 2%, surplus is Fe; The constituent mass per-cent of lanthanide rare is: lanthanum: 26%, cerium: 18%, samarium: 9%, neodymium: 12%, gadolinium: 12%, praseodymium: 13%, dysprosium: 8%, all the other lanthanon: 2%.
The manufacturing process of the wind power tower cylinder flange of the present embodiment, is undertaken by following operation: steel billet blanking-forging-forging size and surface inspection-thermal treatment-mechanical roughing-ultrasonic testing-mechanicl test-machine finshing are to desired shape and size-end treatment; Wherein, steel billet blanking, forging, forging size and surface inspection, mechanical roughing, ultrasonic testing, mechanicl test, machine finshing all use existing conventional process to desired shape and size and end treatment; Wherein heat treatment step adopts double normalizing and double tempering, and normalizing temperature is greater than second time normalizing temperature for the first time, and tempering temperature is greater than second time tempering temperature for the first time;
First time normalizing: adopt zone heating, first paragraph Heating temperature is 750 DEG C, is incubated 10min after temperature, and second segment Heating temperature is 880 DEG C, is incubated 35min after temperature, then carries out second time normalizing after air cooling 15min;
Second time normalizing: adopt zone heating, first paragraph Heating temperature is 650 DEG C of heating, is incubated 1min after temperature, and second segment Heating temperature is 690 DEG C of heating, and be incubated 20min after temperature, then water-cooled is to room temperature;
First time tempering: tempering temperature 640 DEG C, is incubated 10min after temperature, then carries out second time tempering after air cooling 15min;
Second time tempering: tempering temperature 540 DEG C, be incubated 15min after temperature, then water-cooled is to room temperature.
The present embodiment flange after testing, reaches performance index listed by table 1.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. a wind power tower cylinder flange, is characterized in that: the mass percent of its chemical composition is: C:0.15-0.22%, Si:0.55-0.65%, Mn:0.65-0.75%, Ni:5-8%, Cr:4-6%, Nb:0.65-0.85%, Cu:0.25-0.45%, N:0.05-0.07%, Mo:0.05-0.07%, Al:0.7-0.9%, S:0.02-0.03%, Ti:0.08-0.09%, V:0.01-0.04%, B:0.002-0.003%, lanthanide rare: 1-2%, surplus is Fe.
2. wind power tower cylinder flange as claimed in claim 1, it is characterized in that: the constituent mass per-cent of described lanthanide rare is: lanthanum: 25-35%, cerium: 16-19%, samarium: 5-10%, neodymium: 10-13%, gadolinium: 5-12%, praseodymium: 10-15%, dysprosium: 7-9%, all the other lanthanon: 2-8%, above each component sum is 100%.
3. wind power tower cylinder flange as claimed in claim 1 or 2, is characterized in that: 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: 1%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 25%, cerium: 19%, samarium: 5%, neodymium: 13%, gadolinium: 11%, praseodymium: 10%, dysprosium: 9%, all the other lanthanon: 8%.
4. wind power tower cylinder flange as claimed in claim 1 or 2, is characterized in that: 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: 2%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 35%, cerium: 16%, samarium: 10%, neodymium: 10%, gadolinium: 5%, praseodymium: 15%, dysprosium: 7%, all the other lanthanon: 2%.
5. wind power tower cylinder flange as claimed in claim 1 or 2, is characterized in that: 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: 2%, surplus is Fe; The constituent mass per-cent of described lanthanide rare is: lanthanum: 26%, cerium: 18%, samarium: 9%, neodymium: 12%, gadolinium: 12%, praseodymium: 13%, dysprosium: 8%, all the other lanthanon: 2%.
6. the manufacturing process of wind power tower cylinder flange described in claim 1 or 2, is undertaken by following operation: steel billet blanking-forging-forging size and surface inspection-thermal treatment-mechanical roughing-ultrasonic testing-mechanicl test-machine finshing are to desired shape and size-end treatment; It is characterized in that:
Described heat treatment step adopts double normalizing and double tempering, and normalizing temperature is greater than second time normalizing temperature for the first time, and tempering temperature is greater than second time tempering temperature for the first time;
Described first time normalizing: adopt zone heating, first paragraph Heating temperature is 700-750 DEG C, is incubated 10-15min after temperature, and second segment Heating temperature is 850-880 DEG C, is incubated 35-40min after temperature, then carries out second time normalizing after air cooling 10-15min;
Described second time normalizing: adopt zone heating, first paragraph Heating temperature is 600-650 DEG C, is incubated 15-18min after temperature, and second segment Heating temperature is 660-690 DEG C, and be incubated 20-30min after temperature, then water-cooled is to room temperature;
Described first time tempering: tempering temperature 550-640 DEG C, is incubated 10-15min after temperature, then carries out second time tempering after air cooling 10-15min;
Described second time tempering: tempering temperature 500-540 DEG C, after temperature, be incubated 15-20min, then water-cooled is to room temperature.
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| CN201210561223.6A CN103045960B (en) | 2012-12-21 | 2012-12-21 | Flange for wind power drum and manufacturing technique thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004971B (en) * | 2014-05-09 | 2016-02-03 | 无锡市华尔泰机械制造有限公司 | A kind of alloy material flange and forging process thereof |
| CN104250711A (en) * | 2014-09-04 | 2014-12-31 | 卢岳 | Casting method for flange alloy material |
| CN106636970A (en) * | 2015-08-14 | 2017-05-10 | 山东瑞烨法兰有限公司 | An alloy material flange and a machining process |
| CN107723611A (en) * | 2017-11-15 | 2018-02-23 | 曹安飞 | A kind of processing technology of valve Anti-corrosion flange |
| CN107893193A (en) * | 2017-11-15 | 2018-04-10 | 曹安飞 | A kind of processing technology of valve fire resisting flange |
| CN108754345B (en) * | 2018-07-12 | 2019-11-19 | 广西盛畅物流有限公司 | A kind of and β "-Al2O3Ceramic tube has the corrosion-resistant low-nickel low chrome of approximate thermal expansion coefficient |
| CN109881103B (en) * | 2019-03-19 | 2020-04-21 | 潍坊工程职业学院 | Flange material for wind power tower cylinder and preparation method thereof |
| CN110756734A (en) * | 2019-11-21 | 2020-02-07 | 安徽亚太锚链制造有限公司 | Automatic die forging production process for marine anchor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0219194A1 (en) * | 1985-07-31 | 1987-04-22 | Daido Tokushuko Kabushiki Kaisha | Austenitic free cutting stainless steels |
| WO2005093766A1 (en) * | 2004-03-26 | 2005-10-06 | Tdk Corporation | Rare earth magnet, method for producing same and method for producing multilayer body |
| CN101415851A (en) * | 2006-04-04 | 2009-04-22 | 新日本制铁株式会社 | Very thin hard steel sheet and method for producing the same |
-
2012
- 2012-12-21 CN CN201210561223.6A patent/CN103045960B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0219194A1 (en) * | 1985-07-31 | 1987-04-22 | Daido Tokushuko Kabushiki Kaisha | Austenitic free cutting stainless steels |
| WO2005093766A1 (en) * | 2004-03-26 | 2005-10-06 | Tdk Corporation | Rare earth magnet, method for producing same and method for producing multilayer body |
| CN101415851A (en) * | 2006-04-04 | 2009-04-22 | 新日本制铁株式会社 | Very thin hard steel sheet and method for producing the same |
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