CN102554084A - Forging method for water chamber head of steam generator of third-generation nuclear power station - Google Patents
Forging method for water chamber head of steam generator of third-generation nuclear power station Download PDFInfo
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- CN102554084A CN102554084A CN2010105828481A CN201010582848A CN102554084A CN 102554084 A CN102554084 A CN 102554084A CN 2010105828481 A CN2010105828481 A CN 2010105828481A CN 201010582848 A CN201010582848 A CN 201010582848A CN 102554084 A CN102554084 A CN 102554084A
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Abstract
The invention discloses a forging method for a water chamber head of a steam generator of a third-generation nuclear power station, which is used for forging the water chamber head of the steam generator of the third-generation nuclear power station. The internal spherical radius of the water chamber head is no less than 1500mm, the water chamber head comprises a bent section, a straight section and a nozzle, and double vacuum steel ingots are used as raw materials. The forging process includes the steps: firstly, cogging; secondly, combined forging; and thirdly, rotating extrusion. A megaton free forging press is used for forging the double vacuum steel ingots into cylindrical billets, and then the internal shape of a forging is forged by means of rotating extrusion through a mould. The forging manufactured by the forging method can meet the technical requirement of the water chamber head, water chamber head forging materials are compact, reasonable in metal flow line distribution and not easy to crack, difficulty in machining is reduced, metal cutting output is less, and machining difficulty and cost can be reduced.
Description
Technical field
The present invention relates to a kind of forging method of nuclear power generating equipment, be specifically related to a kind of forging method of third generation nuclear power station steam generator water chamber head.
Background technology
In recent years, power shortages have become the bottleneck that restriction various countries economy 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.And global nuclear power has got into a high-speed developing period, and in order to improve energy resource structure, each industrially developed country and developing country are all in the development of actively being devoted to nuclear power.
At present, nuclear power technology just develops towards the maximization direction, and the manufacturing of third generation nuclear power station key equipment all need be used the ultra-large type forging.Reactor steam generator (SG) water chamber head forging in the nuclear power heap type AP1000 of a new generation project, because diameter is big, complex-shaped (straight section+circular arc+ozzle) adopts traditional forging method can't produce the forging near shape like this.
Summary of the invention
Technical problem to be solved by this invention provides a kind of forging method of third generation nuclear power station steam generator water chamber head, and it can forge the water chamber head of the third generation nuclear power station steam generator that meets instructions for use.
For solving the problems of the technologies described above, the technical solution of the forging method of third generation nuclear power station steam generator water chamber head of the present invention is:
Be used to forge the water chamber head of third generation nuclear power station steam generator, the inner sphere radius of this water chamber head is not less than 1500mm, comprises curved section, straight section and ozzle on it; With two vacuum steel ingots is raw material, adopts ton flat-die forging press, and forging process is divided into following steps:
The first step, cogging; With two vacuum steel ingot excision rising heads, rising head excision amount >=18%; The excision bottom, Bottoming amount >=7%;
In second step, combined type forges; The forging temperature that to pass through excision is heated to 1220 ± 20 ℃, and the combination forging method through jumping-up+pulling+differential temperature forges makes combination forging ratio >=3, and forging process for fuel is become cylinder blank;
In the differential temperature forging process, the forging surface is forged by being cooled to 780 ± 50 ℃ more than 850 ℃, cooldown rate is >=100 ℃/h.
Reduce to below 850 ℃ like the forging temperature in jumping-up and the pulling process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
The 3rd step, rotation extrusion; The temperature of forging is heated to 1220 ± 20 ℃, adopts mould that forging is rotated extruding, each anvil drafts≤200mm, the anglec of rotation≤30 °.
Reduce to below 850 ℃ like the forging temperature in the rotation extrusion process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
The technique effect that the present invention can reach is:
The present invention adopts ton flat-die forging press, and two vacuum steel ingots are forged becomes cylinder blank earlier, then through the mould rotation extrusion; Forge the interior shape of forging; Adopt the forging of method manufacturing of the present invention can satisfy the specification requirement of water chamber head, guarantee that water chamber head forging material is fine and close, metal streamline distributes rationally, be difficult for cracking the mach difficulty of reduction; The metal cutting amount is few, and can reduce processing and manufacturing difficulty and cost.
The present invention adopts the combined type forging method, forge with the rotation extrusion process in the strict temperature of controlling, the forging temperature is remained in 850～1240 ℃ the scope; And the drafts in the rotation extrusion process is controlled at is not more than 200mm, the anglec of rotation is controlled at and is not more than 30 °, and final forging ratio is controlled at and is not less than 3; Can guarantee that the forging geomery connects near the part exterior feature; And can guarantee that forging is difficult for producing phenomenons such as folding, wrinkling in forging process, the forging material is fine and close, and composition is even; Metal streamline distributes rationally, stable performance.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 is the sketch map of the water chamber head of third generation nuclear power station steam generator;
Fig. 2 is the sketch map of the two vacuum steel ingots of raw material of the present invention;
Fig. 3 carries out the shape sketch map behind the jumping-up with forging;
Fig. 4 is the shape sketch map after forging is pulled out;
Fig. 5 carries out the shape sketch map after differential temperature forges with forging;
Fig. 6 is rotated the shape sketch map after the extruding with forging;
Fig. 7 is the flow chart of the forging method of third generation nuclear power station steam generator water chamber head of the present invention.
The specific embodiment
As shown in Figure 7; The forging method of third generation nuclear power station steam generator water chamber head of the present invention is used to forge the water chamber head of third generation nuclear power station steam generator, and the structure of this water chamber head is as shown in Figure 1; Inner sphere radius is 1989mm; The end socket wall thickness is 254mm, and height is 1658mm, comprises curved section, straight section and ozzle on it; The present invention adopts ton flat-die forging press, is raw material with two vacuum steel ingots as shown in Figure 2, and forging process is divided into following steps:
The first step, cogging; With two vacuum steel ingot excision rising heads as shown in Figure 2, rising head excision amount >=18%; The excision bottom, Bottoming amount >=7%; To guarantee that two vacuum steel ingots have enough excision amounts;
In second step, combined type forges; The forging temperature that to pass through excision is heated to 1220 ± 20 ℃, and the combination forging method through jumping-up+pulling+differential temperature forges makes combination forging ratio >=3, and forging process for fuel is become cylinder blank;
Promptly earlier forging is carried out jumping-up, become shape as shown in Figure 3; Then forging is pulled out, become shape as shown in Figure 4, again forging is carried out differential temperature and forge, be about to the forging surface and forge by being quickly cooled to 780 ± 50 ℃ more than 850 ℃, cooldown rate is >=100 ℃/h, becomes shape as shown in Figure 5;
Reduce to below 850 ℃ like the forging temperature in jumping-up and the pulling process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
The 3rd step, rotation extrusion; The temperature of forging is heated to 1220 ± 20 ℃, adopts mould forging to be rotated extruding, each anvil drafts≤200mm; The anglec of rotation≤30 °; Make the parts profile of the shape of forging near water chamber head, as shown in Figure 6, the size of forging satisfies processing request;
Reduce to below 850 ℃ like the forging temperature in the rotation extrusion process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
Claims (6)
1. the forging method of a third generation nuclear power station steam generator water chamber head is used to forge the water chamber head of third generation nuclear power station steam generator, and the inner sphere radius of this water chamber head is not less than 1500mm, comprises curved section, straight section and ozzle on it; It is characterized in that: with two vacuum steel ingots is raw material, adopts ton flat-die forging press, and forging process is divided into following steps:
The first step, cogging; With two vacuum steel ingot excision rising heads, excision bottom;
In second step, combined type forges; The forging temperature that to pass through excision is heated to 1220 ± 20 ℃, and the combination forging method through jumping-up+pulling+differential temperature forges makes combination forging ratio >=3, and forging process for fuel is become cylinder blank;
The 3rd step, rotation extrusion; The temperature of forging is heated to 1220 ± 20 ℃, adopts mould that forging is rotated extruding, each anvil drafts≤200mm, the anglec of rotation≤30 °.
2. the forging method of third generation nuclear power station steam generator water chamber head according to claim 1 is characterized in that: rising head excision amount >=18% of the said first step.
3. the forging method of third generation nuclear power station steam generator water chamber head according to claim 1 and 2 is characterized in that: Bottoming amount >=7% of the said first step.
4. the forging method of third generation nuclear power station steam generator water chamber head according to claim 1; It is characterized in that: in the differential temperature forging process in said second step; The forging surface is forged by being cooled to 780 ± 50 ℃ more than 850 ℃, and cooldown rate is >=100 ℃/h.
5. the forging method of third generation nuclear power station steam generator water chamber head according to claim 1; It is characterized in that: reduce to below 850 ℃ like the forging temperature in the jumping-up in said second step and the pulling process; Forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
6. the forging method of third generation nuclear power station steam generator water chamber head according to claim 1; It is characterized in that: reduce to below 850 ℃ like the forging temperature in the rotation extrusion process in said the 3rd step; Forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
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| CN2010105828481A CN102554084A (en) | 2010-12-10 | 2010-12-10 | Forging method for water chamber head of steam generator of third-generation nuclear power station |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974731A (en) * | 2012-12-24 | 2013-03-20 | 中国第一重型机械股份公司 | Forging method for integral sealing head for nuclear power |
| CN103143659A (en) * | 2013-03-21 | 2013-06-12 | 通裕重工股份有限公司 | Hollow forging method of nuclear power main pipeline |
| CN103567339A (en) * | 2012-08-07 | 2014-02-12 | 上海重型机器厂有限公司 | Forging method for elliptical seal head of CAP1400 steam generator |
| CN104368724A (en) * | 2014-11-24 | 2015-02-25 | 二重集团（德阳）重型装备股份有限公司 | Forging forming process for large thick-wall end socket with bearing and nozzle |
| CN104550589A (en) * | 2013-10-15 | 2015-04-29 | 上海重型机器厂有限公司 | Forging forming method of lower head forge piece for CAP1400 nuclear power pressurizer |
| CN104550624A (en) * | 2013-10-22 | 2015-04-29 | 中国第一重型机械股份公司 | Near-net forming forging method of integrated bottom head of nuclear reactor pressure vessel |
| CN105728607A (en) * | 2016-04-19 | 2016-07-06 | 贵州航天新力铸锻有限责任公司 | Billet for forming large-sized double-lug U-shaped forged piece |
| CN109513866A (en) * | 2018-11-13 | 2019-03-26 | 上海电气上重铸锻有限公司 | The extrusion forming method of nuclear power water chamber head |
| CN109759530A (en) * | 2019-01-22 | 2019-05-17 | 宋鑫 | A kind of production technology of the pump head body for oil-gas mining |
| CN109822027A (en) * | 2019-02-28 | 2019-05-31 | 二重（德阳）重型装备有限公司 | The forging and molding mold and forging method of the integrated end socket of nuclear power |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567339A (en) * | 2012-08-07 | 2014-02-12 | 上海重型机器厂有限公司 | Forging method for elliptical seal head of CAP1400 steam generator |
| CN103567339B (en) * | 2012-08-07 | 2016-08-03 | 上海重型机器厂有限公司 | The forging forming method of CAP1400 steam generator ellipsoidal head |
| CN102974731A (en) * | 2012-12-24 | 2013-03-20 | 中国第一重型机械股份公司 | Forging method for integral sealing head for nuclear power |
| CN103143659A (en) * | 2013-03-21 | 2013-06-12 | 通裕重工股份有限公司 | Hollow forging method of nuclear power main pipeline |
| CN104550589B (en) * | 2013-10-15 | 2017-06-06 | 上海电气上重铸锻有限公司 | The forging forming method of CAP1400 nuclear power voltage-stablizer lower end socket forge pieces |
| CN104550589A (en) * | 2013-10-15 | 2015-04-29 | 上海重型机器厂有限公司 | Forging forming method of lower head forge piece for CAP1400 nuclear power pressurizer |
| CN104550624B (en) * | 2013-10-22 | 2016-04-27 | 中国第一重型机械股份公司 | The near-net-shape forging method of nuclear reactor pressure container integration bottom (head) |
| CN104550624A (en) * | 2013-10-22 | 2015-04-29 | 中国第一重型机械股份公司 | Near-net forming forging method of integrated bottom head of nuclear reactor pressure vessel |
| CN104368724B (en) * | 2014-11-24 | 2016-05-25 | 二重集团（德阳）重型装备股份有限公司 | The large thick-wall end socket forging and forming technology of band supporting and ozzle |
| CN104368724A (en) * | 2014-11-24 | 2015-02-25 | 二重集团（德阳）重型装备股份有限公司 | Forging forming process for large thick-wall end socket with bearing and nozzle |
| CN105728607A (en) * | 2016-04-19 | 2016-07-06 | 贵州航天新力铸锻有限责任公司 | Billet for forming large-sized double-lug U-shaped forged piece |
| CN109513866A (en) * | 2018-11-13 | 2019-03-26 | 上海电气上重铸锻有限公司 | The extrusion forming method of nuclear power water chamber head |
| CN109759530A (en) * | 2019-01-22 | 2019-05-17 | 宋鑫 | A kind of production technology of the pump head body for oil-gas mining |
| CN109822027A (en) * | 2019-02-28 | 2019-05-31 | 二重（德阳）重型装备有限公司 | The forging and molding mold and forging method of the integrated end socket of nuclear power |
| CN109822027B (en) * | 2019-02-28 | 2020-03-31 | 二重（德阳）重型装备有限公司 | Forging forming die and forging method of integrated seal head for nuclear power |
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Application publication date: 20120711 |