CN101745785B - Method for manufacturing neutron flux-measured sleeve crossed stiffened plate by forging - Google Patents
Method for manufacturing neutron flux-measured sleeve crossed stiffened plate by forging Download PDFInfo
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- CN101745785B CN101745785B CN2009102479274A CN200910247927A CN101745785B CN 101745785 B CN101745785 B CN 101745785B CN 2009102479274 A CN2009102479274 A CN 2009102479274A CN 200910247927 A CN200910247927 A CN 200910247927A CN 101745785 B CN101745785 B CN 101745785B
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- 238000005242 forging Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000012937 correction Methods 0.000 claims abstract description 6
- 230000004907 flux Effects 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 238000003754 machining Methods 0.000 abstract 2
- 230000007547 defect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to the technical field of forging, in particular to a method for manufacturing a neutron flux-measured sleeve crossed stiffened plate by forging, which comprises the following steps: selecting an appropriate steel ingot, repeatedly upsetting-drawing the steel ingot at the temperature ranging from 1,150 to 900 DEG C, then bringing the steel ingot into rounding, straightening, reaming and size correction to result in the forging ratio which is not less than 4, and afterwards, implementing rough machining prior to heat treatment, performance heat treatment and machining subsequent to heat treatment sequentially on the steel ingot to obtain the neutron flux-measured sleeve crossed stiffened plate; and the method has the advantage that: various performance indexes of the neutron flux-measured sleeve crossed stiffened plate manufactured according to the method of the invention accord with RCC-M and ASTM standards, so the method guarantees the use requirement of the neutron flux-measured sleeve crossed stiffened plate at nuclear power plant, greatly improves the safety and reliability of the stiffened plate and meets the technical demands of such products.
Description
Technical field
The present invention relates to technical field of forging, especially relate to a kind of by forging the method for making the neutron flux measurement sleeve crossed stiffened plate.
Background technology
In recent years, power shortages have become the bottleneck that the restriction China's economic grows continuously and fast, and as energy savings and the important behave of readjusting the energy structure, nuclear power has been included State Grid's development plan in.The history in year surplus the development of China's nuclear power cause existing 30 always based on research of nuclear power equipment and trial-production on a small scale, forms ripe manufacturing technology and produces equipment capability.Therefore, the nuclear power developing of China just develops towards high-power direction.
At present, the employed forge piece of million kilowatt nuclear power construction project, as be used for the neutron flux measurement sleeve crossed stiffened plate of nuclear power station, because its special Service Environment is very high to the performance requirement of forging, general heat treatment method is handled can not reach standard.And present above-mentioned nuclear power can't be realized production domesticization with the neutron flux measurement sleeve crossed stiffened plate, multidirectionally abroad orders.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, provide a kind of by forge making the method for neutron flux measurement sleeve crossed stiffened plate, this method satisfies the neutron flux measurement sleeve crossed stiffened plate of nuclear power station user demand by accurate setting forging and heat treatment period, temperature manufacturing.
In order to solve the problems of the technologies described above, the object of the invention realizes being finished by following technical scheme:
A kind of by forging the method for making the neutron flux measurement sleeve crossed stiffened plate, it is characterized in that having following steps:
A) selection has the steel ingot of following percentage by weight: trace≤C≤0.35%, trace≤Si≤1.00%, trace≤Mn≤2.00%, trace≤P≤0.030%, trace≤S≤0.015%, 18.50%≤Cr≤20.00%, trace≤B≤0.0018%, 9.00%≤Ni≤10.00%, trace≤N≤0.080%, trace≤Co≤0.06%, trace≤Cu≤1.00%, surplus is Fe and unavoidable impurities;
B) described steel ingot is heated to 600 ℃, insulation 2h; Heat 4h afterwards and make its temperature reach 800 ℃, insulation 2h; Heat 2.5h afterwards and make its temperature reach 1150 ℃, insulation 1.5h also pulls out ejection;
C) in 1180 ℃-900 ℃ temperature range, forge the base substrate that is used for described neutron flux measurement sleeve crossed stiffened plate;
D) the described base substrate that generates in the step c) is carried out roughing;
E) the described base substrate that generates in the step d) is forged by the die forging dimensional drawing;
F) the described base substrate that generates in the step e) is heated to 1055-1075 ℃ and be incubated 1-1.5h, water-cooled is to not being higher than 70 ℃ afterwards;
G) base substrate that generates in the step f) is carried out machined to make described neutron flux measurement sleeve crossed stiffened plate.
The concrete steps of step c) are: the workpiece that step b) generated is heated to 1180 ℃ as initial forging temperature, and jumping-up-pulling repeatedly, button circle, alignment, reaming, correction size make forging ratio be not less than 4 afterwards, be used for the base substrate of described neutron flux measurement sleeve crossed stiffened plate with forging, its final forging temperature is not less than 900 ℃.
Described crossed stiffened plate at room temperature, its hot strength is 572-584Mpa, its yield strength Rp0.2 is not less than 257Mpa, its percentage elongation δ is not less than 68%, its contraction percentage of area Ψ is not less than 71%.
The invention has the beneficial effects as follows: the every performance indications of neutron flux measurement sleeve crossed stiffened plate of employing manufacturing of the present invention all satisfy the standard-required of RCC-M, guaranteed to be used for the instructions for use of nuclear power station neutron flux measurement sleeve crossed stiffened plate, its security, reliability are greatly promoted, satisfied the technical need of this series products.
Description of drawings
Fig. 1 is the embodiment of the invention 1 a neutron flux measurement sleeve crossed stiffened plate front view;
Fig. 2 is the embodiment of the invention 1 a neutron flux measurement sleeve crossed stiffened plate side view.
The specific embodiment
The present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:
The neutron flux measurement sleeve crossed stiffened plate of manufacturing of the present invention is a structure shown in Fig. 1-2, and its length is 325mm, highly is 155mm, and the thickness is 41mm, and thinnest part is 20mm.
Its forging steel ingot selects 12 " square ingot, the chemical composition of its material should satisfy following requirement: trace≤C≤0.35%, trace≤Si≤1.00%; trace≤Mn≤2.00%; trace≤P≤0.030%, trace≤S≤0.015%, 18.50%≤Cr≤20.00%; trace≤B≤0.0018%; 9.00%≤Ni≤10.00%, trace≤N≤0.080%, trace≤Co≤0.06%; trace≤Cu≤1.00%, surplus is Fe and unavoidable impurities.
Because size, the weight of forging and the material of selecting for use thereof are determining the selection of each parameter of Forging Technology, so at above-mentioned neutron flux measurement sleeve crossed stiffened plate, following examples are described in detail for the manufacturing process of this Venturi tube.
Embodiment 1: the requirement of manufacturing process is in the present embodiment:
1. forge:
The head of ingot, ingot tail excision percentage: butt ingot 17%, back-end crop 8%.
A) described steel ingot is heated to 600 ℃, insulation 2h; Heat 4h afterwards and make its temperature reach 800 ℃, insulation 2h; Heat 2.5h afterwards and make its temperature reach 1150 ℃, insulation 1.5h also pulls out ejection;
B) workpiece is heated to 1180 ℃ as initial forging temperature, and jumping-up-pulling repeatedly, button circle, alignment afterwards, reaming, correction size make forging ratio be not less than 4, are used for the base substrate of described neutron flux measurement sleeve crossed stiffened plate with forging, and its final forging temperature is not less than 900 ℃.
2. roughing before the heat treatment: base substrate before heat treatment on request size carry out roughing.
3. property heat treatment: described base substrate is heated to 1055 ℃ and be incubated 1h, and water-cooled is to not being higher than 70 ℃ afterwards;
Key points for operation: described billet surface temperature dropped to 427 ℃ in 3 minutes, and water-cooled is 60 minutes afterwards.
4. machined after the heat treatment: base substrate carries out machined to make the neutron flux measurement sleeve crossed stiffened plate, for the removal of defect area, allows or not to carry out any soldering with polishing method removal of defects under the requirement that does not influence the forging mechanical property.
Embodiment 2: the requirement of manufacturing process is in the present embodiment:
1. forge:
The head of ingot, ingot tail excision percentage: butt ingot 17%, back-end crop 8%.
A) described steel ingot is heated to 600 ℃, insulation 2h; Heat 4h afterwards and make its temperature reach 800 ℃, insulation 2h; Heat 2.5h afterwards and make its temperature reach 1150 ℃, insulation 1.5h also pulls out ejection;
B) workpiece is heated to 1180 ℃ as initial forging temperature, and jumping-up-pulling repeatedly, button circle, alignment afterwards, reaming, correction size make forging ratio be not less than 4, are used for the base substrate of described neutron flux measurement sleeve crossed stiffened plate with forging, and its final forging temperature is not less than 900 ℃.
2. roughing before the heat treatment: base substrate before heat treatment on request size carry out roughing.
3. property heat treatment: described base substrate is heated to 1065 ℃ and be incubated 1.25h, and water-cooled is to not being higher than 70 ℃ afterwards;
Key points for operation: described billet surface temperature dropped to 427 ℃ in 3 minutes, and water-cooled is 60 minutes afterwards.
4. machined after the heat treatment: base substrate carries out machined to make the neutron flux measurement sleeve crossed stiffened plate, for the removal of defect area, allows or not to carry out any soldering with polishing method removal of defects under the requirement that does not influence the forging mechanical property.
Embodiment 3: the requirement of manufacturing process is in the present embodiment:
1. forge:
The head of ingot, ingot tail excision percentage: butt ingot 17%, back-end crop 8%.
A) described steel ingot is heated to 600 ℃, insulation 2h; Heat 4h afterwards and make its temperature reach 800 ℃, insulation 2h; Heat 2.5h afterwards and make its temperature reach 1150 ℃, insulation 1.5h also pulls out ejection;
B) workpiece is heated to 1180 ℃ as initial forging temperature, and jumping-up-pulling repeatedly, button circle, alignment afterwards, reaming, correction size make forging ratio be not less than 4, are used for the base substrate of described neutron flux measurement sleeve crossed stiffened plate with forging, and its final forging temperature is not less than 900 ℃.
2. roughing before the heat treatment: base substrate before heat treatment on request size carry out roughing.
3. property heat treatment: described base substrate is heated to 1075 ℃ and be incubated 1.5h, and water-cooled is to not being higher than 70 ℃ afterwards;
Key points for operation: described billet surface temperature dropped to 427 ℃ in 3 minutes, and water-cooled is 60 minutes afterwards.
4. machined after the heat treatment: base substrate carries out machined to make the neutron flux measurement sleeve crossed stiffened plate, for the removal of defect area, allows or not to carry out any soldering with polishing method removal of defects under the requirement that does not influence the forging mechanical property.
After adopting technical scheme among above-mentioned 3 embodiment to complete, test to obtain data shown in the following table for forging:
Mechanical performance
As implied above, the every performance indications of neutron flux measurement sleeve crossed stiffened plate of employing manufacturing of the present invention all satisfy the standard-required of RCC-M, guaranteed to be used for the instructions for use that primary side of steam generator of nuclear power plant is taken over safe end and witness spare thereof, its security, reliability are greatly promoted, satisfied the technical need of this series products.
Claims (3)
1. one kind is passed through to forge the method for making the neutron flux measurement sleeve crossed stiffened plate, it is characterized in that having following steps:
A) selection has the steel ingot of following percentage by weight: trace≤C≤0.35%, trace≤Si≤1.00%, trace≤Mn≤2.00%, trace≤P≤0.030%, trace≤S≤0.015%, 18.50%≤Cr≤20.00%, trace≤B≤0.0018%, 9.00%≤Ni≤10.00%, trace≤N≤0.080%, trace≤Co≤0.06%, trace≤Cu≤1.00%, surplus is Fe and unavoidable impurities;
B) described steel ingot is heated to 600 ℃, insulation 2h; Heat 4h afterwards and make its temperature reach 800 ℃, insulation 2h; Heat 2.5h afterwards and make its temperature reach 1150 ℃, insulation 1.5h also pulls out ejection;
C) in 1180 ℃-900 ℃ temperature range, forge the base substrate that is used for described neutron flux measurement sleeve crossed stiffened plate;
D) the described base substrate that generates in the step c) is carried out roughing;
E) the described base substrate that generates in the step d) is forged by the die forging dimensional drawing;
F) the described base substrate that generates in the step e) is heated to 1055-1075 ℃ and be incubated 1-1.5h, water-cooled is to not being higher than 70 ℃ afterwards;
G) base substrate that generates in the step f) is carried out machined to make described neutron flux measurement sleeve crossed stiffened plate.
2. according to claim 1 a kind of by forging the method for making the neutron flux measurement sleeve crossed stiffened plate, the concrete steps that it is characterized in that step c) are: the workpiece that step b) generated is heated to 1180 ℃ as initial forging temperature, and jumping-up-pulling repeatedly, button circle, alignment, reaming, correction size make forging ratio be not less than 4 afterwards, be used for the base substrate of described neutron flux measurement sleeve crossed stiffened plate with forging, its final forging temperature is not less than 900 ℃.
3. according to claim 1 a kind of by forging the method for making the neutron flux measurement sleeve crossed stiffened plate, it is characterized in that described crossed stiffened plate at room temperature, its hot strength is 572-584Mpa, its yield strength Rp0.2 is not less than 257Mpa, its percentage elongation δ is not less than 68%, and its contraction percentage of area Ψ is not less than 71%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102479274A CN101745785B (en) | 2009-12-31 | 2009-12-31 | Method for manufacturing neutron flux-measured sleeve crossed stiffened plate by forging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102479274A CN101745785B (en) | 2009-12-31 | 2009-12-31 | Method for manufacturing neutron flux-measured sleeve crossed stiffened plate by forging |
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| CN101745785A CN101745785A (en) | 2010-06-23 |
| CN101745785B true CN101745785B (en) | 2011-06-08 |
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Effective date of registration: 20220831 Address after: 224200 east of Jingba road and north of Dongqu Second Road, Dongtai Economic Development Zone, Yancheng City, Jiangsu Province (in Dongtai Huimin urbanization construction and Development Co., Ltd.) Patentee after: Jiangsu Chuangqi Testing Technology Co.,Ltd. Address before: 224200 No.8, Weijiu Road, Dongtai Economic Development Zone, Yancheng City, Jiangsu Province Patentee before: SHANGHAI XINMIN (DONGTAI) HEAVY FORGING Co.,Ltd. |
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Application publication date: 20100623 Assignee: DONGTAI GAOKE TECHNOLOGY INNOVATION PARK Co.,Ltd. Assignor: Jiangsu Chuangqi Testing Technology Co.,Ltd. Contract record no.: X2023980048819 Denomination of invention: Method for manufacturing neutron flux measurement casing cross rib plates through forging Granted publication date: 20110608 License type: Common License Record date: 20231202 |
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