CN106077415B - A kind of forging technology of nuclear island spindle - Google Patents
A kind of forging technology of nuclear island spindle Download PDFInfo
- Publication number
- CN106077415B CN106077415B CN201610706819.9A CN201610706819A CN106077415B CN 106077415 B CN106077415 B CN 106077415B CN 201610706819 A CN201610706819 A CN 201610706819A CN 106077415 B CN106077415 B CN 106077415B
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- China
- Prior art keywords
- forging
- circular arc
- temperature
- ratio
- swage block
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/06—Hammers tups; Anvils; Anvil blocks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of forging technologies of nuclear island spindle, comprising the following steps: (1) preheats.(2) 1250 ~ 1280 DEG C are heated slowly to, heat preservation 5 ~ 6 is small；(3) it forges.(4) it heats for second.(5) forging and forming.(6) it anneals immediately after finish-forging: being slowly warming up to 950 ~ 980 DEG C and keep the temperature 5 ~ 8 hours, cooled to after 650 DEG C with furnace and be raised again to 860 DEG C, forging is then air-cooled to room temperature.For the forging technology of nuclear island spindle of the invention by jumping-up, pulling on the convex recessed swage block of circular arc dentation, internal modification is uniform, can reach relevant ultrasonic examination requirement and grain size requirement, guarantee the security reliability of nuclear island spindle.
Description
Technical field
The invention belongs to technical field of forging more particularly to a kind of forging technologies of nuclear island spindle.
Background technique
With the rapid development of nuclear power industry, the manufacturing process of each key equipment in nuclear island is actively being studied in China.
Nuclear island spindle is most important as important composition component, safety in nuclear power station.How the intensity, toughness of nuclear island spindle is improved
It is that China core staff must solve the problems, such as with corrosion resistance.
Summary of the invention
It is an object of the present invention to solution above-mentioned technical problems, provide a kind of forging technology of nuclear island spindle, and feature exists
In: including following process:
1) blank steel ingot is put into the heating furnace that furnace temperature is 600 DEG C, preheats 3h；
2) the first fire: being heated slowly to 1250~1280 DEG C, keeps the temperature 5~6 hours；
3) it forges, upsetting pull twice is carried out to the steel ingot after heating on 8MN hydraulic press, guarantee first time upsetting pull ratio are as follows: 1.3
≤ upset ratio≤1.5,1.1≤pulling ratio≤1.3, second of upsetting pull ratio are as follows: 1.0≤upset ratio≤1.2,0.8≤pulling ratio≤
1.0；
4) the second fire, heating temperature keep the temperature 2~3 hours to 1050~1100 DEG C；
5) by steel ingot obtained in step (4) on the convex recessed swage block of circular arc dentation jumping-up, be drawn into and meet size
Forging；
6) it anneals immediately after finish-forging: being slowly warming up to 950~980 DEG C and keep the temperature 5~8 hours, cooled to after 650 DEG C again with furnace
860 DEG C are raised to, forging is then air-cooled to room temperature；
The convex recessed swage block of circular arc dentation, including upper swage block and lower swage block, upper swage block are two sides conical surface protrusion in
Between be arranged to protrusion more than two equal radiis arc convex surface, and by the smooth mistake of circular arc camber between adjacent circular arc convex surface
It crosses, lower swage block is the arc convex surface that the V-type conical surface is recessed to the intermediate more than two equal radiis for being arranged to protrusion, adjacent circular arc
It is smoothly transitted between convex surface by circular arc camber, is also smoothly transitted by circular arc camber between the arc convex surface and the V-type conical surface, it is described
Two sides conical surface angle and V-type conical surface angle it is equal be all α, α can change within the scope of 135 °~155 °.
Compared with prior art, the invention has the advantages that having internal modification uniform, relevant ultrasonic wave can be reached and visited
Wound requires and grain size requirement, and the intensity, toughness and corrosion resistance of forging greatly improved.
Specific embodiment
Embodiment one
A kind of forging technology of nuclear island spindle, it is characterised in that: including following process:
1) blank steel ingot is put into the heating furnace that furnace temperature is 600 DEG C, preheats 3h；
2) the first fire: being heated slowly to 1250 DEG C, keeps the temperature 5 hours；
3) it forges, upsetting pull twice is carried out to the steel ingot after heating on 8MN hydraulic press, guarantee first time upsetting pull ratio are as follows: upsetting
Thick ratio 1.35, pulls out ratio 1, second of upsetting pull ratio are as follows: and 1.0, pull out ratio 0.8；
4) the second fire, heating temperature keep the temperature 2 hours to 1050 DEG C；
5) by steel ingot obtained in step (4) on the convex recessed swage block of circular arc dentation jumping-up, be drawn into and meet size
Forging；
6) it anneals immediately after finish-forging: being slowly warming up to 950 DEG C and keep the temperature 5 hours, be raised again to 860 after cooling to 650 DEG C with furnace
DEG C, forging is then air-cooled to room temperature；
The convex recessed swage block of circular arc dentation, including upper swage block and lower swage block, upper swage block are two sides conical surface protrusion in
Between be arranged to protrusion more than two equal radiis arc convex surface, and by the smooth mistake of circular arc camber between adjacent circular arc convex surface
It crosses, lower swage block is the arc convex surface that the V-type conical surface is recessed to the intermediate more than two equal radiis for being arranged to protrusion, adjacent circular arc
It is smoothly transitted between convex surface by circular arc camber, is also smoothly transitted by circular arc camber between the arc convex surface and the V-type conical surface, it is described
Two sides conical surface angle and V-type conical surface angle it is equal all be α, α be 135 °.
Embodiment two
A kind of forging technology of nuclear island spindle, it is characterised in that: including following process:
1) blank steel ingot is put into the heating furnace that furnace temperature is 600 DEG C, preheats 3h；
2) the first fire: being heated slowly to 1260 DEG C, keeps the temperature 5.5 hours；
3) it forges, upsetting pull twice is carried out to the steel ingot after heating on 8MN hydraulic press, guarantee first time upsetting pull ratio are as follows: upsetting
Thick ratio≤1.4, pull out ratio 1.2, second of upsetting pull ratio are as follows: upset ratio 1.1 pulls out ratio 0.9；
4) the second fire, heating temperature keep the temperature 2.5 hours to 10909 DEG C；
5) by steel ingot obtained in step (4) on the convex recessed swage block of circular arc dentation jumping-up, be drawn into and meet size
Forging；
6) it anneals immediately after finish-forging: being slowly warming up to 960 DEG C and keep the temperature 7 hours, be raised again to 860 after cooling to 650 DEG C with furnace
DEG C, forging is then air-cooled to room temperature；
The convex recessed swage block of circular arc dentation, including upper swage block and lower swage block, upper swage block are two sides conical surface protrusion in
Between be arranged to protrusion more than two equal radiis arc convex surface, and by the smooth mistake of circular arc camber between adjacent circular arc convex surface
It crosses, lower swage block is the arc convex surface that the V-type conical surface is recessed to the intermediate more than two equal radiis for being arranged to protrusion, adjacent circular arc
It is smoothly transitted between convex surface by circular arc camber, is also smoothly transitted by circular arc camber between the arc convex surface and the V-type conical surface, it is described
Two sides conical surface angle and V-type conical surface angle it is equal all be α, α be 145 °.
Embodiment three
A kind of forging technology of nuclear island spindle, it is characterised in that: including following process:
1) blank steel ingot is put into the heating furnace that furnace temperature is 600 DEG C, preheats 3h；
2) the first fire: being heated slowly to 1280 DEG C, keeps the temperature 6 hours；
3) it forges, upsetting pull twice is carried out to the steel ingot after heating on 8MN hydraulic press, guarantee first time upsetting pull ratio are as follows: upsetting
Thick ratio 1.5, pulls out ratio 1.3, second of upsetting pull ratio are as follows: upset ratio 1.2 pulls out ratio 1.0；
4) the second fire, heating temperature keep the temperature 3 hours to 1100 DEG C；
5) by steel ingot obtained in step (4) on the convex recessed swage block of circular arc dentation jumping-up, be drawn into and meet size
Forging；
6) it anneals immediately after finish-forging: being slowly warming up to 980 DEG C and keep the temperature 8 hours, be raised again to 860 after cooling to 650 DEG C with furnace
DEG C, forging is then air-cooled to room temperature；
The convex recessed swage block of circular arc dentation, including upper swage block and lower swage block, upper swage block are two sides conical surface protrusion in
Between be arranged to protrusion more than two equal radiis arc convex surface, and by the smooth mistake of circular arc camber between adjacent circular arc convex surface
It crosses, lower swage block is the arc convex surface that the V-type conical surface is recessed to the intermediate more than two equal radiis for being arranged to protrusion, adjacent circular arc
It is smoothly transitted between convex surface by circular arc camber, is also smoothly transitted by circular arc camber between the arc convex surface and the V-type conical surface, it is described
Two sides conical surface angle and V-type conical surface angle it is equal all be α, α be 155 °.
Claims (1)
1. a kind of forging technology of nuclear island spindle, it is characterised in that: including following process:
1) blank steel ingot is put into the heating furnace that furnace temperature is 600 DEG C, preheats 3h；
2) the first fire: being heated slowly to 1250~1280 DEG C, keeps the temperature 5~6 hours；
3) it forges, upsetting pull twice is carried out to the steel ingot after heating on 8MN hydraulic press, guarantee first time upsetting pull ratio are as follows: 1.3≤upsetting
Thick ratio≤1.5,1.1≤pulling ratio≤1.3, second of upsetting pull ratio are as follows: 1.0≤upset ratio≤1.2,0.8≤pulling ratio≤1.0；
4 } the second fire, heating temperature keep the temperature 2~3 hours to 1050~1100 DEG C；
5 } by steel ingot obtained in step (4) on the convex recessed swage block of circular arc dentation jumping-up, be drawn into the forging for meeting size；
6 } it anneals immediately after finish-forging: being slowly warming up to 950~980 DEG C and keep the temperature 5~8 hours, be raised again to after cooling to 650 DEG C with furnace
860 DEG C, forging is then air-cooled to room temperature；
The convex recessed swage block of circular arc dentation, including upper swage block and lower swage block, upper swage block are that conical surface protrusion in two sides is set to centre
It is set to the arc convex surface of more than two equal radiis of protrusion, and is smoothly transitted between adjacent circular arc convex surface by circular arc camber, under
Swage block is the arc convex surface that the V-type conical surface is recessed to the intermediate more than two equal radiis for being arranged to protrusion, adjacent arc convex surface
Between smoothly transitted by circular arc camber, also smoothly transitted by circular arc camber between the arc convex surface and the V-type conical surface, the two sides
Conical surface angle and V-type conical surface angle it is equal be all α, α can change within the scope of 135 °~155 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610706819.9A CN106077415B (en) | 2016-08-24 | 2016-08-24 | A kind of forging technology of nuclear island spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610706819.9A CN106077415B (en) | 2016-08-24 | 2016-08-24 | A kind of forging technology of nuclear island spindle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106077415A CN106077415A (en) | 2016-11-09 |
| CN106077415B true CN106077415B (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610706819.9A Active CN106077415B (en) | 2016-08-24 | 2016-08-24 | A kind of forging technology of nuclear island spindle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154961B (en) * | 2019-12-31 | 2021-11-02 | 无锡宝露重工有限公司 | Method for manufacturing shaft forging and shaft forging manufactured by same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513664A (en) * | 2009-04-01 | 2009-08-26 | 燕山大学 | Efficient forging method using curved-surface swage blocks |
| DE102008036226A1 (en) * | 2008-08-02 | 2010-02-04 | Volkswagen Ag | Hollow shaft i.e. transmission shaft, manufacturing method for motor vehicle, involves transforming reform into hollow intermediate form and performing rotary swaging of hollow intermediate form |
| CN102728771A (en) * | 2012-06-26 | 2012-10-17 | 江苏金源锻造股份有限公司 | Method for forging nuclear island spindle |
| CN103894792A (en) * | 2014-02-26 | 2014-07-02 | 陕西华威锻压有限公司 | Method for machining forge piece of large-scale single-flange anti-explosion motor main shaft of all-fiber texture |
| CN104175063A (en) * | 2013-05-28 | 2014-12-03 | 陕西华威锻压有限公司 | All-fiber-texture large-size one-piece flange fan main shaft forging method |
-
2016
- 2016-08-24 CN CN201610706819.9A patent/CN106077415B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008036226A1 (en) * | 2008-08-02 | 2010-02-04 | Volkswagen Ag | Hollow shaft i.e. transmission shaft, manufacturing method for motor vehicle, involves transforming reform into hollow intermediate form and performing rotary swaging of hollow intermediate form |
| CN101513664A (en) * | 2009-04-01 | 2009-08-26 | 燕山大学 | Efficient forging method using curved-surface swage blocks |
| CN102728771A (en) * | 2012-06-26 | 2012-10-17 | 江苏金源锻造股份有限公司 | Method for forging nuclear island spindle |
| CN104175063A (en) * | 2013-05-28 | 2014-12-03 | 陕西华威锻压有限公司 | All-fiber-texture large-size one-piece flange fan main shaft forging method |
| CN103894792A (en) * | 2014-02-26 | 2014-07-02 | 陕西华威锻压有限公司 | Method for machining forge piece of large-scale single-flange anti-explosion motor main shaft of all-fiber texture |
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| Publication number | Publication date |
|---|---|
| CN106077415A (en) | 2016-11-09 |
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