CN101987344A - Method for forging nuclear power equipment pressure vessel large end sealing plate blank - Google Patents
Method for forging nuclear power equipment pressure vessel large end sealing plate blank Download PDFInfo
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- CN101987344A CN101987344A CN 200910057729 CN200910057729A CN101987344A CN 101987344 A CN101987344 A CN 101987344A CN 200910057729 CN200910057729 CN 200910057729 CN 200910057729 A CN200910057729 A CN 200910057729A CN 101987344 A CN101987344 A CN 101987344A
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Abstract
The invention discloses a method for forging nuclear power equipment pressure vessel large end sealing plate blank. A 16500t hydraulic press is utilized, double vacuum steel ingot with the material of Grade3Class1 in SA-508 and the weight of 190t is forged into a plate blank with the diameter not less than 7000mm; the forging process includes the following steps: step one, drawing; step two, oxygen-acetylene cutting; step three, upsetting. The invention strictly controls the temperature in forging process, so that the temperature of forge piece is ensured to be in the range of 850-1240 DEG C, and forging ratio of each step is ensured, thus plate blank forge piece moulded by forging is difficult to crack, wall thickness is uniform, and material of forge piece is compact, component is uniform, metal stream line distribution is reasonable, and performance is stable.
Description
Technical field
The present invention relates to a kind of forging method, be specifically related to the forging method of the big end socket slab of a kind of nuclear power generating equipment pressure vessel.
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 entered 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 nuclear power generating equipment key equipment all needs to use the ultra-large type forging.The slab diameter of the big end socket forging of reactor pressure vessel (RPV) in a new generation's nuclear power heap type high temperature gas-cooled reactor project even surpass 7000mm adopts existing forging method can't produce large-sized slab like this.
Summary of the invention
Technical problem to be solved by this invention provides the forging method of the big end socket slab of a kind of nuclear power generating equipment pressure vessel, and it can produce the slab that diameter surpasses 7000mm.
For solving the problems of the technologies described above, the technical solution of the forging method of the big end socket slab of nuclear power generating equipment pressure vessel of the present invention is:
Using 16500 tons of hydraulic presses, is Grade3Class1 among the SA-508 with material, and weight is that two vacuum steel ingots of 190 tons forge and become the slab that diameter is not less than 7000mm, and forging process is divided into following steps:
The first step, pulling; Two vacuum steel ingots are heated to 1220 ℃, and pulling becomes 5090mm with the length of 3435mm, makes forging ratio reach 1.48; Reduce to below 850 ℃ as the forging temperature in the pulling process, forging is reheated, the temperature of forging is remained in 850～1220 ℃ the scope;
Second step, oxygen-acetylene cutting; The forging bottom is removed one section, make the height of 5090mm become 4400mm, guarantee the fully excision of two vacuum steel ingots bottom;
The 3rd step, jumping-up; Temperature is heated to 1240 ℃, through jumping-up, the height of 4400mm is become 300 ± 30mm, diameter increases to 7320 ± 50mm by 2100mm, makes forging ratio reach 14.6; In the upsetting process, make 16500 tons of hydraulic presses open a grade 7.5m, and adopt the special-purpose frock 7m broadening anvil that forges; Reduce to below 850 ℃ as the forging temperature in the upsetting 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 is strict control temperature in forging process, the forging temperature is remained in 850～1240 ℃ the scope, and guarantee the forging ratio in each step, therefore the slab forging of forging molding is difficult for cracking, wall thickness is even, and the densification of forging material, and composition is even, metal streamline distributes rationally, stable performance.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the schematic diagram of 190 tons of two vacuum steel ingots;
Fig. 2 is the size schematic diagram through the forging of pulling:
Fig. 3 is the size schematic diagram through the forging of jumping-up;
Fig. 4 is the flow chart of the forging method of the big end socket slab of nuclear power generating equipment pressure vessel of the present invention.
The specific embodiment
As shown in Figure 4, the forging method of the big end socket slab of nuclear power generating equipment pressure vessel of the present invention, use 16500 tons of hydraulic presses, with material is Grade3Class1 among the SA-508, and weight is 190 tons, and an ingot mouthful diameter on one's body is 2878mm, ingot body lower port diameter is 2465mm, be 215mm for the two vacuum steel ingots forgings of 3435mm become minimum wall thickness (MINI W.) highly, diameter is the slab of 7170mm, and forging method is divided into following steps:
The first step, pulling; Two vacuum steel ingots as shown in Figure 1 are heated to 1220 ℃, and pulling becomes 5090mm with the length of 3435mm, as shown in Figure 2, makes forging ratio reach 1.48; Reduce to below 850 ℃ as the forging temperature in the pulling process, forging is reheated, the temperature of forging is remained in 850～1220 ℃ the scope;
Second step, oxygen-acetylene cutting; The forging bottom is removed one section, make the height of 5090mm become 4400mm, guarantee the fully excision of two vacuum steel ingots bottom;
The 3rd step, jumping-up; Temperature is heated to 1240 ℃, through jumping-up, the height of 4400mm is become 300 ± 30mm, as shown in Figure 3, make forging ratio reach 14.6; Reduce to below 850 ℃ as the forging temperature in the upsetting process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
This step will be depressed into height 4400mm highly has only 300 ± 30mm, and diameter increases to diameter 7320 ± 50mm by original 2100mm, for fear of forging perk all around occurring, the center draws the phenomenon of thin even drawing crack to take place, make 16500 tons of hydraulic presses open a grade 7.5m, and adopt the special-purpose frock 7m broadening anvil that forges.
Forge by above step, calculate according to the RCC-M standard, total forging ratio reaches 5.6.
It is big to the invention solves the big end socket slab of pressure vessel diameter, and slab is thin, and diameter compares up to 33.3 with thickness, perk around forging very easily occurs during forging, and the high problem of the problem of thin even drawing crack is drawn at the center.
The present invention is used to make the slab of the big end socket of pressure vessel of the high temperature gas-cooled reactor project in Shidao Bay.
Claims (3)
1. the forging method of the big end socket slab of nuclear power generating equipment pressure vessel, it is characterized in that, use 16500 tons of hydraulic presses, is Grade3Class1 among the SA-508 with material, weight is that two vacuum steel ingots forgings of 190 tons become the slab that diameter is not less than 7000mm, and forging process is divided into following steps:
The first step, pulling; Two vacuum steel ingots are heated to 1220 ℃, and pulling becomes 5090mm with the length of 3435mm, makes forging ratio reach 1.48; Reduce to below 850 ℃ as the forging temperature in the pulling process, forging is reheated, the temperature of forging is remained in 850～1220 ℃ the scope;
Second step, oxygen-acetylene cutting; The forging bottom is removed one section, make the height of 5090mm become 4400mm, guarantee the fully excision of two vacuum steel ingots bottom;
The 3rd step, jumping-up; Temperature is heated to 1240 ℃, through jumping-up, the height of 4400mm is become 300 ± 30mm, diameter increases to 7320 ± 50mm by 2100mm, makes forging ratio reach 14.6; Reduce to below 850 ℃ as the forging temperature in the upsetting process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope.
2. the forging method of the big end socket slab of nuclear power generating equipment pressure vessel according to claim 1 is characterized in that: in described the 3rd step upsetting process, make 16500 tons of hydraulic presses open a grade 7.5m.
3. the forging method of the big end socket slab of nuclear power generating equipment pressure vessel according to claim 1 and 2 is characterized in that: in described the 3rd step upsetting process, adopt the special-purpose frock 7m broadening anvil that forges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910057729 CN101987344B (en) | 2009-08-07 | 2009-08-07 | Method for forging nuclear power equipment pressure vessel large end sealing plate blank |
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| CN 200910057729 CN101987344B (en) | 2009-08-07 | 2009-08-07 | Method for forging nuclear power equipment pressure vessel large end sealing plate blank |
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| CN101987344A true CN101987344A (en) | 2011-03-23 |
| CN101987344B CN101987344B (en) | 2013-03-13 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441631A (en) * | 2011-11-16 | 2012-05-09 | 东北特殊钢集团有限责任公司 | Method for forging wider flat blank from alloy steel ingot with smaller diameter and larger height-diameter ratio |
| CN102825192A (en) * | 2011-06-17 | 2012-12-19 | 上海重型机器厂有限公司 | Method for forging upper shell of nuclear power equipment with outer bench |
| CN104259362A (en) * | 2014-10-21 | 2015-01-07 | 中国第一重型机械股份公司 | Nuclear reactor integrating lower end socket integrity profiling and forging method |
| CN105921655A (en) * | 2016-06-03 | 2016-09-07 | 上海新闵（东台）重型锻造有限公司 | Integrated seal head slab of pressure vessel for nuclear power and forge molding method thereof |
| CN107252866A (en) * | 2017-06-08 | 2017-10-17 | 四川理工学院 | The multiple protrusion ozzle large-sized end enclosure forging integral forging and forming methods of nuclear reactor band |
| 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 |
| CN110434262A (en) * | 2019-08-12 | 2019-11-12 | 中国第一重型机械股份公司 | End sealing plate blank forging forging method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166469C (en) * | 2000-11-27 | 2004-09-15 | 中国第二重型机械集团公司 | Technoloyg for manufacturing thick-wall closure head with integral bearing apnn stand |
| CN101264506B (en) * | 2007-03-12 | 2012-02-15 | 无锡宏达重型锻压有限公司 | Method for processing pressure container forgeable piece |
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2009
- 2009-08-07 CN CN 200910057729 patent/CN101987344B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825192A (en) * | 2011-06-17 | 2012-12-19 | 上海重型机器厂有限公司 | Method for forging upper shell of nuclear power equipment with outer bench |
| CN102825192B (en) * | 2011-06-17 | 2015-08-19 | 上海重型机器厂有限公司 | The forging method of the nuclear power generating equipment upper shell with outer step |
| CN102441631A (en) * | 2011-11-16 | 2012-05-09 | 东北特殊钢集团有限责任公司 | Method for forging wider flat blank from alloy steel ingot with smaller diameter and larger height-diameter ratio |
| CN104259362A (en) * | 2014-10-21 | 2015-01-07 | 中国第一重型机械股份公司 | Nuclear reactor integrating lower end socket integrity profiling and forging method |
| CN104259362B (en) * | 2014-10-21 | 2016-01-13 | 中国第一重型机械股份公司 | Nuclear reactor integration low head integrated profiling forging method |
| CN105921655A (en) * | 2016-06-03 | 2016-09-07 | 上海新闵（东台）重型锻造有限公司 | Integrated seal head slab of pressure vessel for nuclear power and forge molding method thereof |
| CN107252866A (en) * | 2017-06-08 | 2017-10-17 | 四川理工学院 | The multiple protrusion ozzle large-sized end enclosure forging integral forging and forming methods of nuclear reactor band |
| 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 |
| CN110434262A (en) * | 2019-08-12 | 2019-11-12 | 中国第一重型机械股份公司 | End sealing plate blank forging forging method |
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| Publication number | Publication date |
|---|---|
| CN101987344B (en) | 2013-03-13 |
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Effective date of registration: 20161201 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy Machines Plant Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy Machines Plant Co., Ltd. |