CN103103459A - Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process - Google Patents
Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process Download PDFInfo
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Abstract
The invention relates to a large-scale forging and manufacture process wind electricity slewing bearing forging and a manufacture process, the manufacture process comprises the following steps: selecting materials, blanking, heating, forging, performing thermal treatment after forging, front machining, rear machining, performing physical and chemical inspection, ultrasonic flaw detection, performing finish machining, cleaning and packaging. The first normalising temperature is higher than second normalising temperature, the second normalising can not destroy the first normalising effect, the structure refinement effect is more obvious; normalising adopts heating by segments, the second segment heating reduce the difference of temperature between surface and core on the basis of first segment heating, the thickness direction structure of the large-scale forging and manufacture process wind electricity slewing bearing forging is fine and uniform, the heat treatment employs heating by segments, and the normalising and tempering technical effect can be further guaranteed, and the requirements that elongation percentage is greater than or equal to 13 and the transverse plane shrinkage is greater and equal to 55 can be guaranteed.
Description
Technical field
The present invention relates to a kind of bearing forging and manufacturing process, specifically a kind of large-scale wind electricity rotating bearing forging and manufacturing process thereof.
Background technology
According to the planning of " 12 " renewable energy source, wind-powered electricity generation will be greatly developed as the important industry of renewable energy source, plan 5,000,000 kilowatts of China's offshore wind farm installations in 2015, be planned for 3,000 ten thousand kilowatts of the year two thousand twenty offshore wind farm installations.Wind power equipment is made fast-developing, and the large-scale wind power generating set of 5 megawatts and 6 megawatts is is in succession researched and developed and produced, and 6 megawatt large-scale wind electricity rotating bearings are also made in research and development thereupon.Large-size pivoting support need satisfy the large-scale wind electricity user to the requirement of heavy froging property indices.Tissue, grain fineness number and the depth of hardening zone of the rotating bearing forging of existing explained hereafter can't satisfy the large-size pivoting support requirement, distortion and the stressed condition of matrix after table is quenched has larger impact to following process, thereby the tensile strength of causing, yield strength, unit elongation, end face shrinking percentage and corrosion resistance are not high.
Summary of the invention
Technical problem to be solved by this invention is:
How to guarantee that large-scale wind electricity rotating bearing forging has outstanding corrosion resistance is arranged;
How to guarantee that large-scale wind electricity rotating bearing forging has high-tensile and high-yield strength;
How to guarantee that large-scale wind electricity rotating bearing forging 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 large-scale wind electricity rotating bearing forging, the mass percent of its chemical composition is: C:0.55-0.65%, Si:0.65-0.75%, Mn:0.55-0.65%, Ni:0.2-0.4%, Cr:2-4%, Nb:0.15-0.25%, Cu:0.05-0.08%, N:0.08-0.09%, Mo:0.15-0.18%, Al:0.1-0.3%, S:0.07-0.09%, Ti:0.01-0.03%, V:0.7-0.9%, B:0.008-0.009%, compound rare-earth: 1-3%, surplus is Fe.
A kind of manufacturing process of large-scale wind electricity rotating bearing forging is undertaken by following operation: selection-blanking-heating-forging-forging postheat treatment-front machining-thermal treatment-rear machining-physical and chemical inspection-UT (Ultrasonic Testing)-precision work-cleaning-packing;
Heating process adopts zone heating, and the first paragraph Heating temperature is 660-680 ℃ of heating, and to the rear insulation of temperature 11-13min, the second segment Heating temperature is 620-640 ℃ of heating, is incubated 15-17min after temperature, and then water-cooled is to room temperature;
Forge the postheat treatment operation and adopt double normalizing+one time tempering+cooling, normalizing temperature is greater than normalizing temperature for the second time for the first time;
Normalizing for the first time: adopt zone heating, the first paragraph Heating temperature is 900-930 ℃, and to the rear insulation of temperature 17-19min, the second segment Heating temperature is 800-830 ℃, is incubated 21-23min after temperature, then carries out normalizing for the second time after air cooling 5-7min;
Normalizing for the second time: adopt zone heating, the first paragraph Heating temperature is 720-750 ℃ of heating, and to the rear insulation of temperature 5-7min, the second segment Heating temperature is 630-650 ℃ of heating, is incubated 15-17min after temperature, and then water-cooled is to room temperature;
Tempering: tempering temperature 740-760 ℃, be incubated 16-18min after temperature, then carry out cooling;
The method that cooling employing water-cooled is combined with air cooling, first adopt water-cooled with the rate of cooling of 4-6 ℃/s with the steel plate water-cooled to 560-580 ℃, then air cooling is to 470-490 ℃, then adopt water-cooled with the rate of cooling of 1-3 ℃/s with the steel plate water-cooled to room temperature;
Zone heating is adopted in thermal treatment, and the first paragraph Heating temperature is 760-780 ℃ of heating, and to the rear insulation of temperature 15-17min, the second segment Heating temperature is 660-680 ℃ of heating, is incubated 5-7min after temperature, and then air cooling is to room temperature.
In above operation: selection, blanking, forging, front machining, rear machining, physical and chemical inspection, UT (Ultrasonic Testing), precision work, cleaning and packing are all used existing conventional process.
The technical scheme that the present invention further limits is:
Aforesaid large-scale wind electricity rotating bearing forging, the constituent mass per-cent of wherein said compound rare-earth is: lanthanum: 12-15%, cerium: 15-18%, scandium: 16-19%, yttrium: 9-11%, samarium: 7-9%, neodymium: 11-13%, gadolinium: 7-9%, praseodymium: 1-3%, dysprosium: 8-15%, all the other lanthanon: 1-3%, above each component sum is 100%.
Aforesaid large-scale wind electricity rotating bearing forging, the mass percent of its chemical composition is: C:0.55%, Si:0.65%, Mn:0.65%, Ni:0.4%, Cr:2%, Nb:0.15%, Cu:0.08%, N:0.08%, Mo:0.15%, Al:0.1%, S:0.07%, Ti:0.01%, V:0.7%, B:0.008%, compound rare-earth: 3%, surplus is Fe; The constituent mass per-cent of described compound rare-earth is: lanthanum: 12%, and cerium: 18%, scandium: 19%, yttrium: 9%, samarium: 7%, neodymium: 11%, gadolinium: 7%, praseodymium: 1%, dysprosium: 15%, all the other lanthanon: 1%.
Aforesaid large-scale wind electricity rotating bearing forging, the mass percent of its chemical composition is: C:0.65%, Si:0.75%, Mn:0.55%, Ni:0.3%, Cr:4%, Nb:0.25%, Cu:0.05%, N:0.09%, Mo:0.16%, Al:0.3%, S:0.09%, Ti:0.02%, V:0.8%, B:0.009%, compound rare-earth: 2%, surplus is Fe; The constituent mass per-cent of described compound rare-earth is: lanthanum: 15%, and cerium: 15%, scandium: 16%, yttrium: 11%, samarium: 8%, neodymium: 13%, gadolinium: 8%, praseodymium: 2%, dysprosium: 10%, all the other lanthanon: 2%.
Aforesaid large-scale wind electricity rotating bearing forging, the mass percent of its chemical composition is: C:0.6%, Si:0.7%, Mn:0.6%, Ni:0.2%, Cr:3%, Nb:0.2%, Cu:0.07%, N:0.08%, Mo:0.18%, Al:0.2%, S:0.08%, Ti:0.03%, V:0.09%, B:0.008%, compound rare-earth: 1%, surplus is Fe; The constituent mass per-cent of described compound rare-earth is: lanthanum: 13%, and cerium: 16%, scandium: 17%, yttrium: 10%, samarium: 9%, neodymium: 12%, gadolinium: 9%, praseodymium: 3%, dysprosium: 8%, all the other lanthanon: 3%.
Advantage of the present invention is:
The present invention is by the restriction of composition and processing parameter, particularly add appropriate lanthanide series rare-earth elements, and double normalizing+one time tempering+cooling heat treatment step, both avoided carbide separating out at intergranular, prevent again simultaneously carburizing and the nitriding of heat treatment process, guaranteed the corrosion resistance of material; Heating process of the present invention adopts zone heating, controls by temperature to make the distortion of matrix after table is quenched less, and stressed condition is better, guarantees that following process is less on the matrix impact; The defectives such as banded structure of large-scale wind electricity rotating bearing forging are alleviated obviously, and structure refinement is even; A tempering after normalizing is organized more uniform and stablely, and more refinement of crystal grain is greatly improved tensile strength, yield strength, toughness and the low temperature impact properties of large-scale wind electricity rotating bearing forging; Adopt special process for cooling after tempering, prevented carburizing and the nitriding of heat treatment process, guaranteed the corrosion resistance of material; Zone heating is also adopted in thermal treatment, has further guaranteed the technique effect of normalizing and tempering, has guaranteed unit elongation 〉=13, the requirement of end face shrinking percentage 〉=55.
The present invention's normalizing temperature for the first time higher than normalizing temperature for the second time, makes normalizing for the second time not destroy the effect of normalizing for the first time, makes tissue thinning effect more obvious; Zone heating is taked in normalizing, and second segment heating can reduce temperature poor of surface and heart section on the basis of first paragraph heating, make large-scale wind electricity rotating bearing forging thickness direction fine microstructures even; After normalizing, tempering further reduces temperature poor of surface and heart section, surperficially reaches unanimity to heart section performance thereby make; Cooling after tempering, the method of being combined with air cooling by water-cooled, first with speed of cooling water-cooled faster, then carry out air cooling, last again by slower cooling by water to room temperature, not only can improve the toughness of large-scale wind electricity rotating bearing forging and obtain comprehensive mechanical property (specifically can see below the mechanical property of invention advantage part) preferably, and make organize more uniform and stable, pore and trachoma seldom occur, guaranteed the corrosion resistance of material.
In a word, the present invention takes zone heating, can effectively shorten the time that adds of high temperature section, makes grain refinement effect more obvious, and the grain fineness number of organizing of thickness direction is reached unanimity; Adopt double normalizing, and normalizing temperature is higher for the first time, can crystal grain thinning, improve simultaneously intensity and toughness, can alleviate or eliminate the defectives such as banded structure, improve large-scale wind electricity rotating bearing forging integral body impact property; A tempering after normalizing is organized more uniform and stablely, and low temperature impact properties further improves, and surface to heart section performance reaches unanimity; Coolingly be combined with air cooling by water-cooled, and control by the speed of speed of cooling, and make and organize more uniform and stablely, pore and trachoma seldom occur, and obtain comprehensive mechanical property and corrosion resistance preferably.Large-scale wind electricity rotating bearing forging of the present invention is through NSS test and ASS test, and test-results all has comparatively excellent corrosion resistance nature.
The specific performance of large-scale wind electricity rotating bearing forging of the present invention is: tensile strength 900-1050MP, yield strength 〉=750MP, unit elongation 〉=13, the requirement of end face shrinking percentage 〉=55.
Specific performance of the present invention can see the following form:
Table 1 the present invention and the large-scale wind electricity rotating bearing forging performance index contrast of commonly using
Embodiment
Embodiment 1
The large-scale wind electricity rotating bearing forging of the present embodiment, the mass percent of its chemical composition is: C:0.55%, Si:0.65%, Mn:0.65%, Ni:0.4%, Cr:2%, Nb:0.15%, Cu:0.08%, N:0.08%, Mo:0.15%, Al:0.1%, S:0.07%, Ti:0.01%, V:0.7%, B:0.008%, compound rare-earth: 3%, surplus is Fe; The constituent mass per-cent of compound rare-earth is: lanthanum: 12%, and cerium: 18%, scandium: 19%, yttrium: 9%, samarium: 7%, neodymium: 11%, gadolinium: 7%, praseodymium: 1%, dysprosium: 15%, all the other lanthanon: 1%.
The manufacturing process of the present embodiment large-scale wind electricity rotating bearing forging is undertaken by following operation: selection-blanking-heating-forging-forging postheat treatment-front machining-thermal treatment-rear machining-physical and chemical inspection-UT (Ultrasonic Testing)-precision work-cleaning-packing; In above operation: selection, blanking, forging, front machining, rear machining, physical and chemical inspection, UT (Ultrasonic Testing), precision work, cleaning and packing are all used existing conventional process.
Heating process adopts zone heating, and the first paragraph Heating temperature is 660 ℃ of heating, and to the rear insulation of temperature 11min, the second segment Heating temperature is 620 ℃ of heating, is incubated 15min after temperature, and then water-cooled is to room temperature.
Forge the postheat treatment operation and adopt double normalizing+one time tempering+cooling, normalizing temperature is greater than normalizing temperature for the second time for the first time; Normalizing for the first time: adopt zone heating, the first paragraph Heating temperature is 900 ℃, and to the rear insulation of temperature 17min, the second segment Heating temperature is 800 ℃, is incubated 21min after temperature, then carries out normalizing for the second time after air cooling 5min; Normalizing for the second time: adopt zone heating, the first paragraph Heating temperature is 720 ℃ of heating, and to the rear insulation of temperature 5min, the second segment Heating temperature is 630 ℃ of heating, is incubated 15min after temperature, and then water-cooled is to room temperature; Tempering: 740 ℃ of tempering temperatures, be incubated 16min after temperature, then carry out cooling; The method that cooling employing water-cooled is combined with air cooling, first adopt water-cooled with the rate of cooling of 4 ℃/s with steel plate water-cooled to 560 ℃, air cooling to 470 ℃ then, then adopt water-cooled with the rate of cooling of 1 ℃/s with the steel plate water-cooled to room temperature.
Zone heating is adopted in thermal treatment, and the first paragraph Heating temperature is 760 ℃ of heating, and to the rear insulation of temperature 15min, the second segment Heating temperature is 660 ℃ of heating, is incubated 5min after temperature, and then air cooling is to room temperature.
Embodiment 2
The large-scale wind electricity rotating bearing forging of the present embodiment, the mass percent of its chemical composition is: C:0.65%, Si:0.75%, Mn:0.55%, Ni:0.3%, Cr:4%, Nb:0.25%, Cu:0.05%, N:0.09%, Mo:0.16%, Al:0.3%, S:0.09%, Ti:0.02%, V:0.8%, B:0.009%, compound rare-earth: 2%, surplus is Fe; The constituent mass per-cent of compound rare-earth is: lanthanum: 15%, and cerium: 15%, scandium: 16%, yttrium: 11%, samarium: 8%, neodymium: 13%, gadolinium: 8%, praseodymium: 2%, dysprosium: 10%, all the other lanthanon: 2%.
The manufacturing process of the present embodiment large-scale wind electricity rotating bearing forging is undertaken by following operation: selection-blanking-heating-forging-forging postheat treatment-front machining-thermal treatment-rear machining-physical and chemical inspection-UT (Ultrasonic Testing)-precision work-cleaning-packing; In above operation: selection, blanking, forging, front machining, rear machining, physical and chemical inspection, UT (Ultrasonic Testing), precision work, cleaning and packing are all used existing conventional process.
Heating process adopts zone heating, and the first paragraph Heating temperature is 670 ℃ of heating, and to the rear insulation of temperature 12min, the second segment Heating temperature is 630 ℃ of heating, is incubated 16min after temperature, and then water-cooled is to room temperature.
Forge the postheat treatment operation and adopt double normalizing+one time tempering+cooling, normalizing temperature is greater than normalizing temperature for the second time for the first time; Normalizing for the first time: adopt zone heating, the first paragraph Heating temperature is 920 ℃, and to the rear insulation of temperature 18min, the second segment Heating temperature is 820 ℃, is incubated 22min after temperature, then carries out normalizing for the second time after air cooling 6min; Normalizing for the second time: adopt zone heating, the first paragraph Heating temperature is 730 ℃ of heating, and to the rear insulation of temperature 6min, the second segment Heating temperature is 640 ℃ of heating, is incubated 16min after temperature, and then water-cooled is to room temperature; Tempering: 750 ℃ of tempering temperatures, be incubated 17min after temperature, then carry out cooling; The method that cooling employing water-cooled is combined with air cooling, first adopt water-cooled with the rate of cooling of 5 ℃/s with steel plate water-cooled to 570 ℃, air cooling to 480 ℃ then, then adopt water-cooled with the rate of cooling of 2 ℃/s with the steel plate water-cooled to room temperature.
Zone heating is adopted in thermal treatment, and the first paragraph Heating temperature is 770 ℃ of heating, and to the rear insulation of temperature 16min, the second segment Heating temperature is 670 ℃ of heating, is incubated 6min after temperature, and then air cooling is to room temperature.
Embodiment 3
The large-scale wind electricity rotating bearing forging of the present embodiment, the mass percent of its chemical composition is: C:0.6%, Si:0.7%, Mn:0.6%, Ni:0.2%, Cr:3%, Nb:0.2%, Cu:0.07%, N:0.08%, Mo:0.18%, Al:0.2%, S:0.08%, Ti:0.03%, V:0.09%, B:0.008%, compound rare-earth: 1%, surplus is Fe; The constituent mass per-cent of compound rare-earth is: lanthanum: 13%, and cerium: 16%, scandium: 17%, yttrium: 10%, samarium: 9%, neodymium: 12%, gadolinium: 9%, praseodymium: 3%, dysprosium: 8%, all the other lanthanon: 3%.
The manufacturing process of the present embodiment large-scale wind electricity rotating bearing forging is undertaken by following operation: selection-blanking-heating-forging-forging postheat treatment-front machining-thermal treatment-rear machining-physical and chemical inspection-UT (Ultrasonic Testing)-precision work-cleaning-packing; In above operation: selection, blanking, forging, front machining, rear machining, physical and chemical inspection, UT (Ultrasonic Testing), precision work, cleaning and packing are all used existing conventional process.
Heating process adopts zone heating, and the first paragraph Heating temperature is 680 ℃ of heating, and to the rear insulation of temperature 13min, the second segment Heating temperature is 640 ℃ of heating, is incubated 17min after temperature, and then water-cooled is to room temperature.
Forge the postheat treatment operation and adopt double normalizing+one time tempering+cooling, normalizing temperature is greater than normalizing temperature for the second time for the first time; Normalizing for the first time: adopt zone heating, the first paragraph Heating temperature is 930 ℃, and to the rear insulation of temperature 19min, the second segment Heating temperature is 830 ℃, is incubated 23min after temperature, then carries out normalizing for the second time after air cooling 7min; Normalizing for the second time: adopt zone heating, the first paragraph Heating temperature is 750 ℃ of heating, and to the rear insulation of temperature 7min, the second segment Heating temperature is 650 ℃ of heating, is incubated 17min after temperature, and then water-cooled is to room temperature; Tempering: 760 ℃ of tempering temperatures, be incubated 18min after temperature, then carry out cooling; The method that cooling employing water-cooled is combined with air cooling, first adopt water-cooled with the rate of cooling of 6 ℃/s with steel plate water-cooled to 580 ℃, air cooling to 490 ℃ then, then adopt water-cooled with the rate of cooling of 3 ℃/s with the steel plate water-cooled to room temperature.
Zone heating is adopted in thermal treatment, and the first paragraph Heating temperature is 780 ℃ of heating, and to the rear insulation of temperature 17min, the second segment Heating temperature is 680 ℃ of heating, is incubated 7min after temperature, and then air cooling is to room temperature.
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 requirement of the present invention.
Claims (6)
1. large-scale wind electricity rotating bearing forging, it is characterized in that: the mass percent of its chemical composition is: C:0.55-0.65%, Si:0.65-0.75%, Mn:0.55-0.65%, Ni:0.2-0.4%, Cr:2-4%, Nb:0.15-0.25%, Cu:0.05-0.08%, N:0.08-0.09%, Mo:0.15-0.18%, Al:0.1-0.3%, S:0.07-0.09%, Ti:0.01-0.03%, V:0.7-0.9%, B:0.008-0.009%, compound rare-earth: 1-3%, surplus is Fe.
2. large-scale wind electricity rotating bearing forging as claimed in claim 1, it is characterized in that: the constituent mass per-cent of described compound rare-earth is: lanthanum: 12-15%, cerium: 15-18%, scandium: 16-19%, yttrium: 9-11%, samarium: 7-9%, neodymium: 11-13%, gadolinium: 7-9%, praseodymium: 1-3%, dysprosium: 8-15%, all the other lanthanon: 1-3%, above each component sum is 100%.
3. large-scale wind electricity rotating bearing forging as claimed in claim 1 or 2, it is characterized in that: the mass percent of its chemical composition is: C:0.55%, Si:0.65%, Mn:0.65%, Ni:0.4%, Cr:2%, Nb:0.15%, Cu:0.08%, N:0.08%, Mo:0.15%, Al:0.1%, S:0.07%, Ti:0.01%, V:0.7%, B:0.008%, compound rare-earth: 3%, surplus is Fe; The constituent mass per-cent of described compound rare-earth is: lanthanum: 12%, and cerium: 18%, scandium: 19%, yttrium: 9%, samarium: 7%, neodymium: 11%, gadolinium: 7%, praseodymium: 1%, dysprosium: 15%, all the other lanthanon: 1%.
4. large-scale wind electricity rotating bearing forging as claimed in claim 1 or 2, it is characterized in that: the mass percent of its chemical composition is: C:0.65%, Si:0.75%, Mn:0.55%, Ni:0.3%, Cr:4%, Nb:0.25%, Cu:0.05%, N:0.09%, Mo:0.16%, Al:0.3%, S:0.09%, Ti:0.02%, V:0.8%, B:0.009%, compound rare-earth: 2%, surplus is Fe; The constituent mass per-cent of described compound rare-earth is: lanthanum: 15%, and cerium: 15%, scandium: 16%, yttrium: 11%, samarium: 8%, neodymium: 13%, gadolinium: 8%, praseodymium: 2%, dysprosium: 10%, all the other lanthanon: 2%.
5. large-scale wind electricity rotating bearing forging as claimed in claim 1 or 2, it is characterized in that: the mass percent of its chemical composition is: C:0.6%, Si:0.7%, Mn:0.6%, Ni:0.2%, Cr:3%, Nb:0.2%, Cu:0.07%, N:0.08%, Mo:0.18%, Al:0.2%, S:0.08%, Ti:0.03%, V:0.09%, B:0.008%, compound rare-earth: 1%, surplus is Fe; The constituent mass per-cent of described compound rare-earth is: lanthanum: 13%, and cerium: 16%, scandium: 17%, yttrium: 10%, samarium: 9%, neodymium: 12%, gadolinium: 9%, praseodymium: 3%, dysprosium: 8%, all the other lanthanon: 3%.
6. the manufacturing process of the described large-scale wind electricity rotating bearing of claim 1 or 2 forging, undertaken by following operation: selection-blanking-heating-forging-forging postheat treatment-front machining-thermal treatment-rear machining-physical and chemical inspection-UT (Ultrasonic Testing)-precision work-cleaning-packing; It is characterized in that:
Described heating process adopts zone heating, and the first paragraph Heating temperature is 660-680 ℃ of heating, and to the rear insulation of temperature 11-13min, the second segment Heating temperature is 620-640 ℃ of heating, is incubated 15-17min after temperature, and then water-cooled is to room temperature;
Described forging postheat treatment operation adopts double normalizing+one time tempering+cooling, and normalizing temperature is greater than normalizing temperature for the second time for the first time;
Described normalizing for the first time: adopt zone heating, the first paragraph Heating temperature is 900-930 ℃, and to the rear insulation of temperature 17-19min, the second segment Heating temperature is 800-830 ℃, is incubated 21-23min after temperature, then carries out normalizing for the second time after air cooling 5-7min;
Described normalizing for the second time: adopt zone heating, the first paragraph Heating temperature is 720-750 ℃ of heating, and to the rear insulation of temperature 5-7min, the second segment Heating temperature is 630-650 ℃ of heating, is incubated 15-17min after temperature, and then water-cooled is to room temperature;
Described tempering: tempering temperature 740-760 ℃, be incubated 16-18min after temperature, then carry out cooling;
The method that described cooling employing water-cooled is combined with air cooling, first adopt water-cooled with the rate of cooling of 4-6 ℃/s with the steel plate water-cooled to 560-580 ℃, then air cooling is to 470-490 ℃, then adopt water-cooled with the rate of cooling of 1-3 ℃/s with the steel plate water-cooled to room temperature;
Zone heating is adopted in described thermal treatment, and the first paragraph Heating temperature is 760-780 ℃ of heating, and to the rear insulation of temperature 15-17min, the second segment Heating temperature is 660-680 ℃ of heating, is incubated 5-7min after temperature, and then air cooling is to room temperature.
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| CN201310052451.5A CN103103459B (en) | 2013-02-18 | 2013-02-18 | Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process |
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| CN105239021B (en) * | 2014-07-08 | 2017-07-25 | 南京赛达机械制造有限公司 | A kind of high pressure resistant turbine blade and its production technology |
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| CN104846299A (en) * | 2015-04-22 | 2015-08-19 | 苏州劲元油压机械有限公司 | Manufacturing process of high pressure-resistant overflow valve |
| CN104911509A (en) * | 2015-04-23 | 2015-09-16 | 苏州劲元油压机械有限公司 | Making technology of guiding overflow valve |
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| CN106369107A (en) * | 2016-08-31 | 2017-02-01 | 芜湖市和蓄机械股份有限公司 | Flywheel for automobile transmission, and manufacturing method and application of flywheel |
| CN106381454A (en) * | 2016-08-31 | 2017-02-08 | 南京惠德机械有限公司 | Piston rod of closed mold height measuring device and heat treatment technology of piston rod |
| CN106435976A (en) * | 2016-08-31 | 2017-02-22 | 苏州利德精工制造有限公司 | Projectile shuttle of projectile loom and heat treatment process of projectile shuttle |
| CN111604641A (en) * | 2020-04-26 | 2020-09-01 | 江苏科技大学 | Manufacturing method for obtaining C-shaped scraps through machining of slewing bearing for wind power |
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