CN108555202B - A kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar - Google Patents
A kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar Download PDFInfo
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- CN108555202B CN108555202B CN201810315530.3A CN201810315530A CN108555202B CN 108555202 B CN108555202 B CN 108555202B CN 201810315530 A CN201810315530 A CN 201810315530A CN 108555202 B CN108555202 B CN 108555202B
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- forging
- cogging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
The present invention discloses a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar; vacuum induction+electroslag furnace under protective Ar gas is taken to smelt; bar stock, the secondary cogging of diameter forging machine, the technique for finally producing UNS N06690 alloy flat bar through five passages by diameter forging machine are opened by quick forging machine；Diameter forging machine is than traditional hammering speed block, the deflection forged in the same time is big, single hammer drafts is big, by designing drafts, the amount of feeding, the technological parameters such as striking frequency increase the flat bar internal strain uniformity to reduce the anisotropy of forging, to solve the problems such as differential big and 350 DEG C of tensile strength of grain size are unqualified.Beneficial effects of the present invention: by taking fast forging+diameter forging+diameter forging combined producing process, the good outer dimension for controlling UNS N06690 alloy flat bar, grain size tissue are differential, finally meet the tensile strength requirement of 350 DEG C of drawing by high temperature.
Description
Technical field
The invention belongs to metal material manufacturing fields, are related to a kind of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar
Manufacturing method, specifically for manufacture have higher intensity and antioxidant anticorrosive ability and use under 650 DEG C~1000 DEG C high temperature
UNS N06690 alloy flat bar is sold in insertion U-shaped in nuclear reactor heap.
Background technique
UNS N06690 alloy is a kind of austenitic nickel-based corrosion resistant alloy containing 30%Cr.It is not only molten in chloride
In liquid and sodium hydroxide solution, there is the stress corrosion dehiscence resistant ability more excellent than Inconel 600, Incoloy 800, also have
There are high intensity, good metallurgical stability and excellent processing characteristics.Especially in various types of high-temperature water, the alloy
Show low corrosion rate and excellent stress corrosion cracking drag.
UNS N06690 alloy is processed using forging, traditional hammer forging technique deformation is uneven, and the deformation of forging is by artificial
Operation is controlled, and the deflection of the drafts size and every forging one fire time that cause every hammer is extremely uneven, and is become by round billet
At the deformation fire time of flat bar due to small by single hammer drafts, inevitably there is transverse spreading institute in the long limitation of deformation time
The tensile stress corner crack of generation, the defects such as final forging temperature caused by hammering overlong time is low cause finished product flat bar and portion occur
The defects of subregion is unable to complete Dynamic Recrystallization and produces grain size anisotropic, grain size is differential big, Jin Erzao
The requirement greater than 550MPa is unable to reach at 350 DEG C of high temperature tensile strengths of the alloy.
Summary of the invention
The present invention discloses a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar, takes vacuum sense
+ electroslag furnace under protective Ar gas smelting is answered, bar stock is opened by quick forging machine, the secondary cogging of diameter forging machine is finally produced by diameter forging machine through five passages
The technique of UNS N06690 alloy flat bar；Purpose is the Major Difficulties for solving the production of UNS N06690 alloy flat bar: alloy obtains
Uniform tiny and very poor small dynamic recrystallized structure is difficult, and 350 DEG C of high temperature tensile properties are not easy qualification.
Technical solution of the present invention:
1. process route: vacuum induction furnace smelting+electroslag furnace under protective Ar gas furnace smelting → 3150t quick forging machine cogging → blank essence
Whole → 1800 tons of diameter forging machine forgings → blank finishing → 1800 ton diameter forging machine finished product production → solid solution+ageing treatment → physical and chemical inspection
→ packaging.
2. concrete technology measure:
1) it smelts
Alloy meets the regulation of table 1 using vacuum induction+electroslag furnace under protective Ar gas smelting process production, chemical composition.
Table 1
2) 3150t forges cogging fastly
To Φ 300mm round billet, quick forging machine hammer cogging takes 3 fire time forging large deformation raw in the process for alloy steel ingot cogging
It produces, single press control of hammering into shape 1140 DEG C of Forge Heating temperature, guarantees that the forging final forging temperature of alloy is not less than in 50mm~80mm
920℃。
3) blank finishing
After hammer cogging, alloy blank carries out surface finish processing, and the grinding wheel of granularity 30 is taken to carry out whole body polishing, necessary
When, surface can be taken to scrape processing, it is ensured that alloy bar stock surface quality meets subsequent forging requirement.
4) diameter forging forging round billet
1800 tons of diameter forging machine Forge Heating temperature controls guarantee to take in furnace flat at 1110 DEG C~1130 DEG C, in heating process
Flame burner nozzle heating guarantees that local burning does not occur for blank；Final forging temperature is controlled at 900 DEG C~970 DEG C.
5) blank finishing
After hammer cogging, alloy blank carries out surface finish processing, and the grinding wheel of granularity 30 is taken to carry out whole body polishing, necessary
When, surface vehicle light processing can be taken, it is ensured that alloy bar stock surface quality meets subsequent forging requirement.
6) 1800 tons of diameter forging machine forging finished products
1800 tons of diameter forging machines take the forging of 5 passages, and total deformation is controlled 38.9%；Consider the structural homogenity of finished product
And grain size requirement, take cooling to forge, heating temperature is 1100 DEG C~1120 DEG C；5 passages are taken, it is main to pass through second and the
Three passages carry out big pressure deformation, first and the 4th and the 5th passage be shaping passage；Specific diameter forging process such as table 2.
Table 2
7) solid solution+ageing treatment
Solid solution+ageing treatment of the alloy flat bar through 1070 DEG C~1090 DEG C × 1h+710 DEG C × 10h；Temperature uniformity ±
Within 5 DEG C.
Illustrate about innovative point of the present invention: diameter forging machine is than traditional hammering speed block, the deformation forged in the same time
Amount is big, and single drafts of hammering into shape is big, and by designing drafts, the technological parameters such as striking frequency increase the flat bar internal strain uniformity and come
The anisotropy of forging is reduced, to solve the problems such as differential big and 350 DEG C of tensile strength of grain size are unqualified.
Beneficial effects of the present invention: good to control UNS by taking fast forging+diameter forging+diameter forging combined producing process
The outer dimension of N06690 alloy flat bar, grain size tissue are differential, and the tensile strength for finally meeting 350 DEG C of drawing by high temperature is wanted
It asks.
Specific embodiment
The present invention is described in detail below by embodiment.
Embodiment 1
Flat bar trimmed size: 120mm × 160mm
Alloy smelts ingot through vaccum sensitive stove+electroslag furnace under protective Ar gas, and chemical component is shown in Table 3,
Table 3
After smelting ingot, alloy steel ingot exists through 3150t quick forging machine cogging to Φ 300mm bar stock, the control of cogging final forging temperature
950 DEG C~960 DEG C, cogging list hammer pressure 60mm, cogging surface is good；Bar stock after forging carries out the whole body through the grinding wheel of granularity 30
Polishing guarantees surface zero defect, carries out forging secondary cogging for 1800 tons of diameter forging machines, bar stock heating temperature is 1110 DEG C, finish-forging
Temperature is controlled at 940 DEG C, and average deflection per pass is forged in 10%~36% (computer setting numerical value)；Finished product is carried out after forging
Preceding reconditioning processing；The production of diameter forged piece is finally carried out, five passages production (as shown in table 2) is taken, mainly passes through second and the
Three passages carry out big pressure deformation, first and the 4th and the 5th passage be shaping passage；Finished product flat bar uses electric furnace solid solution+timeliness
After processing, mechanical property and metal lographic examination are carried out to the flat bar, all flat bar is packed and stored after qualification.Product inspection performance is complete
Portion is qualified, and see Table 4 for details.
Table 4
Embodiment 2
Flat bar trimmed size: 120mm × 160mm
Alloy smelts ingot through vaccum sensitive stove+electroslag furnace under protective Ar gas, and chemical component is shown in Table 5,
Table 5
After smelting ingot, alloy steel ingot exists through 3150t quick forging machine cogging to Φ 300mm bar stock, the control of cogging final forging temperature
960 DEG C~980 DEG C, cogging list hammer pressure 60mm, cogging surface is good；Bar stock after forging carries out the whole body through the grinding wheel of granularity 30
Polishing guarantees surface zero defect, carries out forging secondary cogging for 1800 tons of diameter forging machines, bar stock heating temperature is 1120 DEG C, finish-forging
Temperature is controlled at 900 DEG C, and average deformation amount controlling per pass is forged in 10%~36% (computer setting numerical value)；It is carried out after forging
Reconditioning is handled before finished product；The production of diameter forged piece is finally carried out, five passage productions (as shown in table 2) is taken, mainly passes through second
Big pressure is carried out with third passage to deform, first and the 4th and the 5th passage be shaping passage；Finished product flat bar using electric furnace solid solution+
Mechanical property and metal lographic examination are carried out to the flat bar after ageing treatment, all flat bar is packed and stored after qualification.
Product inspection performance is all qualified, and see Table 6 for details.
Table 6
Embodiment 3
Flat bar trimmed size: 120mm × 160mm
Alloy smelts ingot through vaccum sensitive stove+electroslag furnace under protective Ar gas, and chemical component is shown in Table 7,
Table 7
After smelting ingot, alloy steel ingot exists through 3150t quick forging machine cogging to Φ 300mm bar stock, the control of cogging final forging temperature
990 DEG C~1000 DEG C, cogging list hammer pressure 60mm (computer setting numerical value), cogging surface is good；Bar stock after forging is through granularity
30 grinding wheel carries out whole body polishing, guarantees surface zero defect, carries out forging secondary cogging, bar heating temperature for 1800 tons of diameter forging machines
Degree is 1110 DEG C~1120 DEG C, and final forging temperature is controlled at 970 DEG C, and average deformation amount controlling per pass is in 10%~36% (computer
Set numerical value) forging；Reconditioning is handled before carrying out finished product after forging；The production of diameter forged piece is finally carried out, five passage productions are taken
(as shown in table 2), it is main to carry out big pressure with third passage by second and deform, first and the 4th and the 5th passage be shaping road
It is secondary；Finished product flat bar has carried out mechanical property and metal lographic examination to the flat bar after using electric furnace solid solution+ageing treatment, all after qualification
Flat bar is packed and stored.
Product inspection performance is all qualified, and see Table 8 for details.
Table 8
Claims (5)
1. a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar, it is characterised in that: the manufacturer
Method takes vacuum induction+electroslag furnace under protective Ar gas to smelt, and alloy steel ingot opens bar stock by quick forging machine, the secondary cogging of diameter forging machine, finally by
Technique of the diameter forging machine through five passage production UNS N06690 alloy flat bars；
The quick forging machine opens bar stock, alloy steel ingot cogging to Φ 300mm round billet, by adopting during 3150t quick forging machine hammer cogging
3 fire time forging large deformation productions are taken, single press control of hammering into shape 1140 DEG C of Forge Heating temperature, guarantees alloy in 50mm~80mm
It forges final forging temperature and is not less than 920 DEG C；
Round billet is forged in the secondary cogging of diameter forging machine, is forged by 1800 tons of diameter forging machines, heating and temperature control is 1110 DEG C~1130
DEG C, final forging temperature is controlled at 900 DEG C~970 DEG C；Guarantee to take flat flame burner to heat in furnace in heating process, guarantees that blank is not sent out
Raw part burning；Average deformation amount controlling per pass is 10%~36%；
The diameter forging machine produces alloy flat bar, and the forging of 5 passages is taken by 1800 tons of diameter forging machines, and total deformation control exists
38.9%, it is main to carry out big pressure with third passage by second and deform, first and the 4th and the 5th passage be shaping passage；It examines
The structural homogenity and grain size requirement for considering finished product, take cooling to forge, heating temperature is 1100 DEG C~1120 DEG C.
2. a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar according to claim 1, special
Sign is: the forging for taking 5 passages, and specific diameter forging process is as follows:
1st passage opens forging size Φ 225mm, finish-forging specification 200mm × 205mm, deflection 3.1%, frequency 180；
2nd passage opens forging size 200mm × 205mm, finish-forging specification 170mm × 190mm, deflection 21.2%, frequency 180；
3rd passage opens forging size 170mm × 190mm, finish-forging specification 140mm × 181mm, deflection 21.5%, frequency 180；
4th passage opens forging size 140mm × 181mm, finish-forging specification 137mm × 181mm, deflection 2.1%, frequency 180；
5th passage opens forging size 137mm × 181mm, finish-forging specification 135mm × 180mm, deflection 2%, frequency 180；
5 passage total deformations 38.9%.
3. a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar according to claim 1, special
Sign is: the alloy steel ingot through 3150t quick forging machine cogging to Φ 300mm bar stock, the control of cogging final forging temperature 950 DEG C~
960 DEG C, cogging list hammer pressure 60mm；1800 tons of diameter forging machines carry out forging secondary cogging, and bar stock heating temperature is 1110 DEG C, finish-forging
Temperature is controlled at 940 DEG C.
4. a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar according to claim 1, special
Sign is: the alloy steel ingot through 3150t quick forging machine cogging to Φ 300mm bar stock, the control of cogging final forging temperature 960 DEG C~
980 DEG C, cogging list hammer pressure 60mm；1800 tons of diameter forging machines carry out forging secondary cogging, and bar stock heating temperature is 1120 DEG C, finish-forging
Temperature is controlled at 900 DEG C.
5. a kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar according to claim 1, special
Sign is: the alloy steel ingot through 3150t quick forging machine cogging to Φ 300mm bar stock, the control of cogging final forging temperature 990 DEG C~
1000 DEG C, cogging list hammer pressure 60mm；1800 tons of diameter forging machines forge secondary cogging, and bar stock heating temperature is 1110 DEG C~
1120 DEG C, final forging temperature is controlled at 970 DEG C.
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| CN109465602B (en) * | 2018-11-26 | 2020-08-25 | 抚顺特殊钢股份有限公司 | Manufacturing method of rolled material for positioning pin of U-shaped embedded part in nuclear-grade reactor |
| CN112916788B (en) * | 2021-01-19 | 2023-01-31 | 建龙北满特殊钢有限责任公司 | Production method for forging axle for railway vehicle by adopting continuous casting billet |
| CN114472770B (en) * | 2021-12-08 | 2023-04-21 | 抚顺特殊钢股份有限公司 | GH141 alloy large round bar forging process |
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| SU1003983A1 (en) * | 1981-09-18 | 1983-03-15 | Украинский Научно-Исследовательский Институт Специальных Сталей,Сплавов И Ферросплавов | Blank forging method |
| SU1620194A1 (en) * | 1986-09-22 | 1991-01-15 | Всесоюзный Проектно-Технологический Институт Энергетического Машиностроения | Method of radial forging of turbine blade blanks from high-temperature steels and alloys |
| CN102581187B (en) * | 2012-02-21 | 2014-01-22 | 山西太钢不锈钢股份有限公司 | Method for forging flat steel by using universal hammerhead |
| CN103934648B (en) * | 2012-08-20 | 2016-05-04 | 丹阳市龙鑫合金有限公司 | The preparation method of the end cap in the antivibration bar assembly of nuclear power generating sets steam generator |
| CN104139147B (en) * | 2014-07-07 | 2015-12-30 | 贵州航天新力铸锻有限责任公司 | The forging method of T-shaped ring-type forge piece blank reheating in SB564 UNS N06690 alloy large-size |
| CN104308054A (en) * | 2014-10-05 | 2015-01-28 | 山西太钢不锈钢股份有限公司 | Method for forging square-flat steel |
| CN106311942A (en) * | 2015-06-24 | 2017-01-11 | 宝钢特钢有限公司 | Forging method for producing N80A alloy by utilizing radial forging machine |
| CN105689613B (en) * | 2016-03-25 | 2017-11-07 | 大冶特殊钢股份有限公司 | A kind of extraordinary forging method suitable for super-duplex stainless steel bar |
| CN106868436B (en) * | 2017-01-18 | 2021-05-14 | 抚顺特殊钢股份有限公司 | Manufacturing method for producing high-temperature alloy GH4169 fine-grained bar through rapid-diameter forging combination |
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