CN105112625B - A kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging - Google Patents
A kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging Download PDFInfo
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- CN105112625B CN105112625B CN201510630417.0A CN201510630417A CN105112625B CN 105112625 B CN105112625 B CN 105112625B CN 201510630417 A CN201510630417 A CN 201510630417A CN 105112625 B CN105112625 B CN 105112625B
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- 238000005242 forging Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000010792 warming Methods 0.000 claims abstract description 18
- 238000005496 tempering Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 8
- 238000002271 resection Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- 230000001427 coherent effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 229910001566 austenite Inorganic materials 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- 238000010791 quenching Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation 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 discloses a kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging, it is characterised in that the manufacture method comprises the following steps：Steel ingot of the forging with enough resection forms forging；Quenching property heat treatment is carried out to the forging, the forging is warming up to 1052 DEG C, 19 DEG C are air-cooled to after being incubated 6.5 h；Tempering property heat treatment is carried out to the forging afterwards, the forging is warming up to 680 DEG C, 23 DEG C is air-cooled to after being incubated 16h, is warming up to 597 DEG C~600 DEG C again and is incubated 16h, be finally air-cooled to 20 DEG C.It is an advantage of the invention that substituting casting with forging, compared with casting, forging eliminates internal flaw, generates coherent consistent tissue, and by suitably forging and heat-treatment technology method, ensure that the excellent combination property of forging；In the serious place of stress and crystal internal corrosion problem, forging can ensure longer service life and Non-Defected Service.
Description
Technical field
The invention belongs to forge and machining technique field, and in particular to a kind of pressurized-water reactor nuclear power plant shields impeller of pump forging
Manufacture method.
Background technology
AP1000 reactor coolant main pumps are designed exclusively for AP1000 heap-type, its major function be for reactor it is cold
But agent provides drive ram, ensures that heat caused by reactor by reactor core, is delivered to steam hair by enough forced circulation flows
Raw device, produce the steam of pushing turbine acting.
Impeller forging is one of critical component in main pump, very difficult, the technological difficulties being primarily present of manufacturing technology
It is as follows：
（1）In addition to requiring the cooperation of preferable intensity and plasticity and toughness, corrosion resistance, solderability and processability are also required
Can be good；
（2）Forging blank size is Φ 860*620, and sectional dimension and thickness are larger, and requires the property of forging Internal and external cycle
It can simultaneously meet to require, so needing to ensure that forging is fully forged, meet Non-Destructive Testing and the requirement of performance uniformity；Secondly,
Forging ratio of height to diameter is little, and it is more complicated that the metal inside forging flows to situation, and forging examines tangential performance, it is necessary to pass through forging
Method solves the problems, such as the tangential performance of forging；
（3）According to the requirement of input file, need to carry out prolonged tempering, and sample is another twice after forging quenching
It is outer to carry out prolonged Simulated post-weld heat treatment, it need to ensure that the performance of quenched and tempered state and Analog heat-treating state meets to require simultaneously；
According to conventional experience, the material anti-tempered performance is bad, and the strength of materials will drastically decline after long-time is tempered, so will
It is set to meet to require by certain heat treatment method.
The content of the invention
According to the deficiencies of the prior art described above, It is an object of the present invention to provide a kind of pressurized-water reactor nuclear power plant canned motor pump leaf
The manufacture method of forging is taken turns, the manufacture method to steel ingot by carrying out the forging that fire time small deformation amounts and aximal deformation value are combined more
Make, and the property heat treatment for being quenched and being tempered to forging, obtain the forging of excellent combination property.
The object of the invention is realized and completed by following technical scheme：
A kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging, it is characterised in that the manufacture method is included such as
Lower step：Steel ingot of the forging with enough resection forms forging；Quenching property heat treatment is carried out to the forging, by the forging
Part is warming up to 1052 DEG C, and 19 DEG C are air-cooled to after being incubated 6.5 h；Tempering property heat treatment is carried out to the forging afterwards, by described in
Forging is warming up to 680 DEG C, is air-cooled to 23 DEG C after being incubated 16h, is warming up to 597 DEG C~600 DEG C again and is incubated 16h, last air cooling
To 20 DEG C.
During carrying out quenching property heat treatment to the forging, after the forging is warming up into 600 DEG C, described in control
Forging from 600 DEG C be warming up to 1052 DEG C during heating rate≤100 DEG C/h.
To in the steel ingot forging process, the first fire pats the surface of steel ingot, drafts≤2mm, the fire time institute are often hammered into shape
State steel ingot total deformation≤5%；Second fire is gradually increased the dynamics for hammering the steel ingot, often hammers 3~5mm of drafts, the fire time institute into shape
State steel ingot total deformation≤15%；3rd fiery weight impacts the steel ingot, often hammers drafts >=15mm into shape, and the fire time steel ingot is total
Deflection >=100%.
It is an advantage of the invention that substituting casting with forging, compared with casting, forging eliminates internal flaw, the company of generating
Pass through consistent tissue, and by suitably forging and heat-treatment technology method, ensure that the excellent combination property of forging；In stress
Serious place, forging can ensure longer service life and Non-Defected Service with crystal internal corrosion problem.
Brief description of the drawings
Fig. 1 is forge piece manufacturing process flow chart in the present invention.
Embodiment
The feature of the present invention and other correlated characteristics are described in further detail by embodiment below in conjunction with accompanying drawing, with
It is easy to the understanding of technical staff of the same trade：
Embodiment：As shown in figure 1, manufacturer of the present embodiment more particularly to a kind of pressurized-water reactor nuclear power plant shielding impeller forging
Method, specifically comprise the following steps：
（1）Raw material
Outsourcing uses the steel ingot smelted by EAF-VODC-VCD-LF-VD-VOH vacuum metlings+electroslag remelting technique, it is ensured that
The clarity and uniformity of steel ingot；
（2）Forging
Before forging, S41500 steel ingots should have enough resection, to ensure forging without shrinkage cavity and reduce segregation, and
Overall forging is carried out using appropriate forging ratio on 5000T hydraulic presses, it is ensured that forging whole cross section obtains fully forging saturating and forging
Part obtains suitably forging microscopic structure；And the forging technology that fire time small deformation amounts and aximal deformation value are combined more is used, ensure
The grain size of forging, metal flows to and inherent quality, the forging that more fire time small deformation amounts and aximal deformation value are combined in the present embodiment
Making technique is specially：
The more fire of small deformation amount：Steel ingot sectional dimension is larger (Φ 1000*960), and surface of steel ingot and core structure are uneven,
Internal stress is very big, easily ftractures during forging, therefore the forging side of more fire time small deformation amounts is used in the starting stage of forging
Method, i.e. the first fire pats surface of steel ingot, to discharge steel ingot internal stress, often hammers drafts≤2mm, total change of the fire time steel ingot into shape
Shape amount≤5%；Second fire is gradually increased hammer force degree, makes ingot structure gradually uniform and refines, often hammers 3~5mm of drafts into shape, should
Total deformation≤15% of fiery steel ingot；3rd fiery weight impact steel ingot, does forging ratio, further uniform formation, refinement crystalline substance
Grain, often hammer drafts >=15mm, total deformation >=100% of the fire time steel ingot into shape；
Aximal deformation value：Forging force is as far as possible big, in order to prevents coarse grains, improves mechanical performance, it is ensured that forging one
Fiery completion pulling, upset round as a ball shaping；
（3）Property heat treatment and physicochemical property processing
Before property heat treatment, forging endoporus is processed, to improve heat treatment condition, and carries out the lossless inspection of ultrasonic wave
Survey；Property heat treatment is carried out to forging afterwards, including quenches and is tempered, its step is：
（3.1）Quenching：
Workpiece is warming up to 1052 DEG C（It is slowly heated after being warming up to 600 DEG C, heating rate≤100 DEG C/h is controlled, to subtract
It is small due to thermal stress caused by forging internal-external temperature difference), be incubated 6.5h afterwards (according to workpiece interface Size calculation, per 100mm at least
It is incubated 1h), 19 DEG C (it is required that being cooled to less than 26 DEG C) are then air-cooled to, to ensure that material martensite transfor mation is abundant, are obtained with plate
Microscopic structure based on bar martensite, guarantee is provided for the high intensity and high tenacity of material；
（3.2）Tempering
Double tempering employs the special tempering furnace for carrying internal circulation system, and precision reaches ± 3 DEG C, can meet forging
The uniformity of each spot temperature；
The main function of first of tempering is adjustment tissue, and suitable martensite and inverse is obtained by the tempering of proper temperature
Become the ratio of austenite, organization foundation is provided for the final tempering for determining material property；680 DEG C of tempering are warming up to first（
In this temperature-rise period, heating rate≤100 DEG C/h is controlled until reaching 680 DEG C after being warming up to more than 400 DEG C）, afterwards
16h is incubated according to every 25.4mm/h requirement, is come out of the stove after insulation to be done and is air-cooled to 23 DEG C (it is required that being cooled to less than 26 DEG C), obtained
To the ratio of suitable martensite and reversed austenite；
Second tempering purpose is to obtain to stablize suitable structural state, ensures that final performance meets to require；First will
Temperature is accurately controlled in 597 DEG C~600 DEG C this narrow temperature ranges（In this temperature-rise period, when being warming up to
Control heating rate≤100 DEG C/h is until reach 597 DEG C~600 DEG C after more than 400 DEG C）, afterwards according to every 25.4mm/h's
It is required that insulation 16h, is finally air-cooled to 20 DEG C；
By above-mentioned quenching and drawing process, material has finally given the group being made up of tempered sorbite and reversed austenite
Knit, the reversed austenite of wherein needle-like is interspersed between tempered sorbite, ensure that material has good low-temperature flexibility；Tempering temperature
The control planning of degree ensure that the reasonably combined of the strength of materials, plasticity and toughness to the final structural state of material；By performance
Forging sample mechanical property after heat treatment and physicochemical property processing is as shown in the table, it can be found that quenched and tempered state sample and simulation
The mechanical property of post weld heat treatment state sample is far above the value of defined in index；
（4）Machining
It is processed in finished product process using vertical lathe, boring machine, it is ensured that size, finish meet to require；
（5）Carry out Ultrasonic Nondestructive, saw sample, sample processing, physics and chemistry examination successively by step as shown in fig. 1 afterwards
Test, finished product processing, visual examination, PT check.
Claims (2)
1. a kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging, it is characterised in that the manufacture method includes as follows
Step：Steel ingot of the forging with enough resection forms forging；Quenching property heat treatment is carried out to the forging, by the forging
1052 DEG C are warming up to, 19 DEG C are air-cooled to after being incubated 6.5 h；Tempering property heat treatment is carried out to the forging afterwards, by the forging
Part is warming up to 680 DEG C, is air-cooled to 23 DEG C after being incubated 16h, is warming up to 597 DEG C~600 DEG C again and is incubated 16h, be finally air-cooled to
20℃；To in the steel ingot forging process, the first fire pats the surface of steel ingot, drafts≤2mm, the fire time steel are often hammered into shape
Ingot total deformation≤5%；Second fire is gradually increased the dynamics for hammering the steel ingot, often hammers 3~5mm of drafts, the fire time steel into shape
Ingot total deformation≤15%；3rd fiery weight impacts the steel ingot, often hammers drafts >=15mm, the fire time steel ingot total deformation into shape
Amount >=100%.
2. the manufacture method of a kind of pressurized-water reactor nuclear power plant shielding impeller forging according to claim 1, it is characterised in that right
During the forging carries out quenching property heat treatment, after the forging is warming up into 600 DEG C, the forging is controlled from 600
Heating rate≤100 DEG C/h during DEG C being warming up to 1052 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510630417.0A CN105112625B (en) | 2015-09-29 | 2015-09-29 | A kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510630417.0A CN105112625B (en) | 2015-09-29 | 2015-09-29 | A kind of manufacture method of pressurized-water reactor nuclear power plant shielding impeller of pump forging |
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| CN105112625A CN105112625A (en) | 2015-12-02 |
| CN105112625B true CN105112625B (en) | 2018-01-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106670363B (en) * | 2016-12-20 | 2018-08-28 | 上海新闵重型锻造有限公司 | A kind of manufacturing method of high-strength stainless steel forgings |
| CN108588373A (en) * | 2018-05-22 | 2018-09-28 | 大连透平机械技术发展有限公司 | A kind of heat treatment method of X3CrNiMo134 materials |
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| JPH08337853A (en) * | 1995-06-09 | 1996-12-24 | Hitachi Ltd | High corrosion resistant and high strength austenitic sintered steel, its production and use thereof |
| CN101169150B (en) * | 2007-11-29 | 2010-12-08 | 贵州航天新力铸锻有限责任公司 | Million - kilowatts class nuclear power station reactor main bolt production process |
| CN103320718B (en) * | 2013-05-27 | 2015-12-09 | 浙江大隆合金钢有限公司 | The production method of 316LN nuclear power austenitic stainless steel |
| CN104338880A (en) * | 2013-07-31 | 2015-02-11 | 上海重型机器厂有限公司 | Method for forging 1Mn18Cr18N steel guard ring for large power station |
| CN104404356B (en) * | 2014-12-10 | 2016-08-17 | 沈阳科金特种材料有限公司 | A kind of return material method of smelting of impeller martensitic stain less steel |
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Address after: 201109 Shanghai city Minhang District humin Road No. 3082 Patentee after: Shanghai Xinmin New Energy Technology Co.,Ltd. Address before: 201109 Shanghai city Minhang District humin Road No. 3082 Patentee before: SHANGHAI XINMIN HEAVY FORGING CO.,LTD. |