CN102825192A - Method for forging upper shell of nuclear power equipment with outer bench - Google Patents
Method for forging upper shell of nuclear power equipment with outer bench Download PDFInfo
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- CN102825192A CN102825192A CN2011101650963A CN201110165096A CN102825192A CN 102825192 A CN102825192 A CN 102825192A CN 2011101650963 A CN2011101650963 A CN 2011101650963A CN 201110165096 A CN201110165096 A CN 201110165096A CN 102825192 A CN102825192 A CN 102825192A
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Abstract
The invention discloses a method for forging an upper shell of nuclear power equipment with an outer bench. The method comprises the following steps of: forging an electroslag ingot into an upper shell with the outer bench by a 16500-ton hydraulic press, wherein material of the electroslag ingot is Grade 3 Class 2 of SA-508 and weight of the electroslag ingot is 300-340 ton; the forging method is as follows in details: step 1, drawing out the electroslag ingot; step 2, carrying out oxygen-acetylene cutting and blanking the electroslag ingot; step 3, upsetting the electroslag ingot; step 4, forging a centre hole; step 5, drawing out and segregating the electroslag ingot; and step 6, carrying out chambering. According to the method disclosed by the invention, temperature in a forging process is strictly controlled to keep the temperature of forging pieces to be 850-1240 DEG C constantly; a forging ratio of the electroslag ingot in each step is guaranteed; the outer bench of the upper shell is forged and formed directly, so that forging allowance and machining allowance are reduced; and in addition, the forged and formed forge pieces are not easily to be cracked, and the forge pieces are uniform in wall thick, dense in material, uniform in composition, reasonable in metal flow line distribution and stable in property.
Description
Technical field
The present invention relates to a kind of forging method, be specifically related to a kind of forging method of the nuclear power generating equipment upper shell with outer step.
Background technology
At present, the nuclear power industry in the whole world has got into the period of a high speed development, 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.The U.S. will enlarge the important component part of nuclear energy as national energy policy, and present more than 100 nuclear power station in use has considerable part to update; Russia has formulated fairly large nuclear power plan, and existing 5 base groups are in construction; Japanese government plans newly-built 13 nuclear power stations before 2010, builds 7 nuclear power stations after 2011 again; The Asia also has 11 countries to propose respectively to develop nuclear power except that China, Japan and Korea.Before the year two thousand twenty, the whole world needs more than 20 cover nuclear power forging every year at least, and the market prospects of nuclear power forging are boundless.
But because high to the quality requirements of forging in the nuclear power projects, and forge weight is bigger, and the surplus that adopts the method for the straight tube of existing forging to forge is very big, and the weight of steel ingot is also very big, has increased mach surplus simultaneously, has prolonged life cycle of the product.
Summary of the invention
The technical problem that the present invention will solve provides a kind of forging method of the nuclear power generating equipment upper shell with outer step, and directly forging molding goes out the upper shell of the outer step of band.
For solving the problems of the technologies described above, the technical solution of the forging method of the nuclear power generating equipment upper shell of the outer step of band of the present invention is:
Using 16500 tons of hydraulic presses, is the Grade3Class1 among the SA-508 with material, and weight is that 300～340 tons ESR ingot forges the upper shell that becomes the outer step of band, and concrete grammar is divided into following steps:
The first step, pulling; ESR ingot is heated to 1220 ℃, and pulling becomes 5840～6620mm with the length of 3970～4500mm, makes forging ratio reach 1.47; The temperature of forging is remained in 850～1220 ℃ the scope;
Second step, oxygen-acetylene cutting; Cutting length 5420～6200mm, rising head tip cut-off 220mm, bottom end excision 200mm;
The 3rd step, jumping-up; Temperature is heated to 1240 ℃, through jumping-up, the height of 5420～6200mm is become 2460～2820mm, make forging ratio reach 2.2; The temperature of forging is remained in 850～1240 ℃ the scope;
In the 4th step, forge centre bore; Temperature is heated to 1200 ℃,, on forging, forges the center hole of diameter 1650mm, guarantee inside and outside concentric circles through forging centre bore; Forging the temperature that makes forging in the centre bore process remains in 850～1200 ℃ the scope;
The 5th step, the pulling sub-material; Temperature is heated to 1220 ℃, through the pulling sub-material, blank is divided into three steps, the difference in height of adjacent step is controlled at 50～200mm; The temperature of forging is remained in 850～1220 ℃ the scope;
The 6th step, reaming; Temperature is heated to 1200 ℃,,, makes forging ratio reach 1.9 by the completion of forging requirement size through reaming; Three steps replace reaming and two steps to expanding; The temperature of forging is remained in 850～1200 ℃ the scope.
The forging method of the nuclear power generating equipment upper shell of the outer step of band of the present invention, strict control temperature in forging process remains in 850～1240 ℃ the scope forging temperature; And guarantee the forging ratio in each step, directly forging molding goes out the outer step of upper shell, has reduced forging surplus and machining allowance; And the forging behind the forging molding is difficult for cracking, and wall thickness is even, and material is fine and close; Composition is even, and 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 300～340 tons of ESR ingots;
Fig. 2 is the size sketch map through the forging of pulling;
Fig. 3 is the size sketch map through the forging of jumping-up;
Fig. 4 is the size sketch map through the forging of forging centre bore;
Fig. 5 is the size sketch map through the forging of pulling sub-material;
Fig. 6 is the size sketch map through the forging of reaming;
Fig. 7 is the flow chart of the forging method of the nuclear power generating equipment upper shell of step outside the band of the present invention.
The specific embodiment
The forging method of the nuclear power generating equipment upper shell of the outer step of band of the present invention, as shown in Figure 7, use 16500 tons of hydraulic presses; With material is the Grade3Class1 among the SA-508, and weight is 300～340 tons, and diameter is Φ 3500mm, highly is that the ESR ingot of 3970～4500mm forges that to become external diameter be Φ 4770～Φ 5170mm/ Φ 4420～Φ 4820mm; Internal diameter is Φ 3490～Φ 3890mm; Highly be 4180～4580mm, the upper shell of the outer step of band, forging method is divided into following steps:
The first step, pulling; ESR ingot as shown in Figure 1 is heated to 1220 ℃, and pulling becomes 5840～6620mm with the length of 3970～4500mm, and is as shown in Figure 2, makes forging ratio reach 1.47; Reduce to below 850 ℃ like 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; Cutting length 5420～6200mm, rising head tip cut-off 220mm, bottom end excision 200mm guarantees the blank quality;
The 3rd step, jumping-up; Temperature is heated to 1240 ℃, through jumping-up, the height of 5420～6200mm is become 2460～2820mm, as shown in Figure 3, make forging ratio reach 2.2; Reduce to below 850 ℃ like the forging temperature in the upsetting process, forging is reheated, the temperature of forging is remained in 850～1240 ℃ the scope;
In the 4th step, forge centre bore; Temperature is heated to 1200 ℃; Through forging centre bore, on forging, forge the center hole of diameter 1650mm, guarantee inside and outside concentric circles; As shown in Figure 4; Forge in the centre bore process and reduce to below 850 ℃, forging is reheated, the temperature of forging is remained in 850～1200 ℃ the scope like the forging temperature;
The 5th step, the pulling sub-material; Temperature is heated to 1220 ℃,, blank is divided into three steps through the pulling sub-material; Make forging ratio reach 1.2; The difference in height of adjacent step is controlled at 50～200mm, and is as shown in Figure 5, reduces to below 850 ℃ like the forging temperature in the pulling sub-material process; Forging is reheated, the temperature of forging is remained in 850～1220 ℃ the scope;
The 6th step, reaming; Temperature is heated to 1200 ℃, and three steps replace reaming, bellmouth orifice occurs in the middle of avoiding, and finally expand two steps, by the completion of forging requirement size, make forging ratio reach 1.9, and are as shown in Figure 6; Reduce to below 850 ℃ like the forging temperature in the reaming process, forging is reheated, the temperature of forging is remained in 850～1200 ℃ the scope.
Forge by above step, calculate according to the ASME standard, total forging ratio reaches 6.7.
The forging method of the nuclear power generating equipment upper shell of the outer step of band of the present invention, directly forging molding goes out the upper shell of the outer step of band, has reduced forging surplus and machining allowance, has shortened the production cycle of product.
Claims (3)
1. the forging method of the nuclear power generating equipment upper shell of the outer step of a band; It is characterized in that, use 16500 tons of hydraulic presses, is the Grade3Class1 among the SA-508 with material; Weight is that 300～340 tons ESR ingot forges the upper shell that becomes the outer step of band, and concrete grammar is divided into following steps:
The first step, pulling; ESR ingot is heated to 1220 ℃, and pulling becomes 5840～6620mm with the length of 3970～4500mm, makes forging ratio reach 1.47; The temperature of forging is remained in 850～1220 ℃ the scope;
Second step, oxygen-acetylene cutting; Cutting length 5420～6200mm, rising head tip cut-off 220mm, bottom end excision 200mm;
The 3rd step, jumping-up; Temperature is heated to 1240 ℃, through jumping-up, the height of 5420～6200mm is become 2460～2820mm, make forging ratio reach 2.2; The temperature of forging is remained in 850～1240 ℃ the scope;
In the 4th step, forge centre bore; Temperature is heated to 1200 ℃,, on forging, forges the center hole of diameter 1650mm, guarantee inside and outside concentric circles through forging centre bore; Forging the temperature that makes forging in the centre bore process remains in 850～1200 ℃ the scope;
The 5th step, the pulling sub-material; Temperature is heated to 1220 ℃,, blank is divided into three steps through the pulling sub-material; The temperature of forging is remained in 850～1220 ℃ the scope;
The 6th step, reaming; Temperature is heated to 1200 ℃,,, makes forging ratio reach 1.9 by the completion of forging requirement size through reaming; The temperature of forging is remained in 850～1200 ℃ the scope.
2. the forging method of the nuclear power generating equipment upper shell of the outer step of band according to claim 1 is characterized in that: in said the 5th step pulling sub-material, blank is divided into three steps, the difference in height of adjacent step is controlled at 50～200mm.
3. the forging method of the nuclear power generating equipment upper shell of the outer step of band according to claim 1 and 2 is characterized in that: in said the 6th step reaming, three steps replace reaming and two steps to expanding.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104338882A (en) * | 2013-08-07 | 2015-02-11 | 上海重型机器厂有限公司 | Forming method of motor enclosure forging of third-generation nuclear power coolant pump |
| CN107225208A (en) * | 2017-07-13 | 2017-10-03 | 江阴南工锻造有限公司 | A kind of little gear forging technology |
| CN107282837A (en) * | 2017-07-13 | 2017-10-24 | 江阴南工锻造有限公司 | A kind of open socket forging method |
| CN112264568A (en) * | 2020-09-30 | 2021-01-26 | 宝鸡石油机械有限责任公司 | Forging method for air bag shell forming die of drilling pump for circulating system of petroleum drilling machine |
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| JPS5641024A (en) * | 1979-09-13 | 1981-04-17 | Nippon Kokan Raito Steel Kk | Roll for bending |
| CN101987344A (en) * | 2009-08-07 | 2011-03-23 | 上海重型机器厂有限公司 | Method for forging nuclear power equipment pressure vessel large end sealing plate blank |
| CN101987343A (en) * | 2009-08-07 | 2011-03-23 | 上海重型机器厂有限公司 | Forging method of conical cylinder body of nuclear power equipment |
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2011
- 2011-06-17 CN CN201110165096.3A patent/CN102825192B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641024A (en) * | 1979-09-13 | 1981-04-17 | Nippon Kokan Raito Steel Kk | Roll for bending |
| CN101987344A (en) * | 2009-08-07 | 2011-03-23 | 上海重型机器厂有限公司 | Method for forging nuclear power equipment pressure vessel large end sealing plate blank |
| CN101987343A (en) * | 2009-08-07 | 2011-03-23 | 上海重型机器厂有限公司 | Forging method of conical cylinder body of nuclear power equipment |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104338882A (en) * | 2013-08-07 | 2015-02-11 | 上海重型机器厂有限公司 | Forming method of motor enclosure forging of third-generation nuclear power coolant pump |
| CN104338882B (en) * | 2013-08-07 | 2016-08-10 | 上海重型机器厂有限公司 | The forming method of generation Ⅲ nuclear power cooling medium pump motor casing forging |
| CN107225208A (en) * | 2017-07-13 | 2017-10-03 | 江阴南工锻造有限公司 | A kind of little gear forging technology |
| CN107282837A (en) * | 2017-07-13 | 2017-10-24 | 江阴南工锻造有限公司 | A kind of open socket forging method |
| CN107282837B (en) * | 2017-07-13 | 2019-01-29 | 江阴南工锻造有限公司 | A kind of open socket forging method |
| CN107225208B (en) * | 2017-07-13 | 2019-01-29 | 江阴南工锻造有限公司 | A kind of pinion gear forging technology |
| CN112264568A (en) * | 2020-09-30 | 2021-01-26 | 宝鸡石油机械有限责任公司 | Forging method for air bag shell forming die of drilling pump for circulating system of petroleum drilling machine |
| CN112264568B (en) * | 2020-09-30 | 2023-05-12 | 宝鸡石油机械有限责任公司 | Forging method of casing jig of air bag of drilling pump for petroleum drilling machine circulation system |
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| CN102825192B (en) | 2015-08-19 |
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Effective date of registration: 20161216 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy-Machine Factory Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy-Machine Factory Co., Ltd. |