CN105499477A - Nuclear-grade 1 blasting valve shearing cap forging process - Google Patents
Nuclear-grade 1 blasting valve shearing cap forging process Download PDFInfo
- Publication number
- CN105499477A CN105499477A CN201510958488.3A CN201510958488A CN105499477A CN 105499477 A CN105499477 A CN 105499477A CN 201510958488 A CN201510958488 A CN 201510958488A CN 105499477 A CN105499477 A CN 105499477A
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- China
- Prior art keywords
- forging
- cap
- heating
- raw material
- forge
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Classifications
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- 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
- B21K1/20—Making machine elements valve parts
-
- 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
Abstract
The invention discloses a nuclear-grade 1 blasting valve shearing cap forging process. The nuclear-grade 1 blasting valve shearing cap forging process is characterized by comprising specific process steps of: (a) blanking of raw materials; (b) heating of the raw materials; (c) a forging deformation procedure; (d) cooling; and (e) separation of a finished product from a shearing cap after blasting. The forging process of the shearing cap with a high-temperature nickel base alloy material fills the technical blank of a nickel base alloy in the forging field; a forged shearing cap forging is continuous in metal flow line and uniform in metallographic structure, and the mechanical performance is qualified; the raw materials are blanked to prevent corner crack during forging; and the selection of furnace charging temperature during heating prevents rupture in forging caused by excessive thermal stress due to weak heat conductivity of the materials.
Description
Technical field
The invention belongs to FMT exploitation and the manufacturing field of nuclear power valve part, specifically relate to high temperature alloy in core one-level explosive valve parts and shear the Forging Technology of cap.
Background technology
The performance requirement of core one-level explosive valve project to product is very strict, and to shear cap be core component in core one-level explosive valve product, and have particular/special requirement to the inside and outside quality of product, therefore forging performance directly affects the performance of whole product.Shear the production process of cap approximately through raw material disposal, heating, forging, cooling, the operation such as shaping, what shear cap employing is special high-temperature nickel-base alloy material, i.e. INCONEL690, this material does not have ripe Forging Technology to use for reference at home and abroad, can not ensure that forging performance meets the requirement of explosive valve project, this alloy material is domestic and international blanking technique in forging field.
Summary of the invention
In order to make up the defect of the blank FMT of above-mentioned forging, the object of this invention is to provide core one-level explosive valve and shear cap Forging Technology, technology controlling and process is carried out at raw material, heating, forging, cooling aspects, forging goes out the shearing cap forging that metal streamline is continuous, metallographic structure is even, mechanical property is up to standard, performance 100% reaches the requirement of core one-level explosive valve project, and has filled up the technological gap of high-temperature nickel-base alloy in forging field.
To achieve these goals, the technical solution adopted in the present invention is: cap Forging Technology sheared by core one-level explosive valve, it is characterized in that comprising following concrete technology step:
1, raw material blanking
Carry out blanking according to required size, after blanking completes, one-tenth required form material section, carries out end corner angle abate by material section;
End corner angle abate angle R is 5%-10% of material section diameter;
2, raw material heating
1) heating furnace heating pre-treatment
Adopt chamber-type heating furnace, in stove, need not contain ferritic Austenitic corrosion resistant plate by place mat before shove charge heating, described corrosion resistant plate is 0Cr19Ni39 cast steel cushion block, is of a size of 1000mm × 1000mm × 50mm.
2) shove charge
When furnace temp is not more than 500 DEG C, raw material are carried out shove charge;
3) heat
Be warming up to 800 DEG C of insulations with≤60 DEG C/H, temperature retention time be every millimeter 30 seconds-45 seconds; 800 DEG C insulation after, be 150 DEG C-200 DEG C/H with the rate of heat addition, be heated rapidly to 1020 ~ 1050 DEG C of insulations, temperature retention time be every millimeter 30 seconds-45 seconds;
After 1020 ~ 1050 DEG C of insulations, come out of the stove to 1100 DEG C with equipment maximum heating power heating, the maximum heating speed of equipment is 200 ~ 250 DEG C/h.
4) come out of the stove
The raw material heated must be transferred to the appointment station of forging in 60s.
3, forging deformation operation
1) jumping-up
2) forge: comprise and slowly forge and forge fast;
Select 10 tons of free forging electrohydraulic hammers, front 5 hammers slowly forge, and forging energy is 20%-30%, base; Shaping mould put into by raw material after base, forges shaping fast, and it is 100% all-round for forging energy.
3) blind hole is rushed;
4) turnover mould forging depanning;
5) product Light deformation finishing;
Forging energy is controlled by required deflection;
4, cool
Pave air cooling mode and carry out cooling processing;
5, cap separation is sheared after finished product and explosion.
The invention has the beneficial effects as follows:
For the Forging Technology that material is high-temperature nickel-base alloy material shearing cap, filled up the technological gap of nickel-base alloy in forging field, the shearing cap forging metal streamline forged is continuous, metallographic structure even, and mechanics is capable can be up to standard; Raw material blanking process is avoided, during forging, chink occurs, and during heating, choosing of charging temperature is avoided because of cracking when material thermal conductivity difference generation thermal stress is excessive so that forge; After forging deformation operation is first slow, rapidity of blow ensures that forging receives enough strike centre of force portion forgings thoroughly fast simultaneously; Employing pave air cooling type of cooling object be make that forging cools evenly, even tissue and performance even, because avoiding the cooled slow grain growth of Austenitic alloy material without phase transformation.
Accompanying drawing explanation
Fig. 1 is that the present invention shears workpiece figure before cap forging deformation operation jumping-up.
Fig. 2 is that the present invention shears cap forging deformation operation jumping-up figure.
Fig. 3 forges structure chart in the shaping tire of forging deformation operation.
Fig. 4 is that forging deformation operation shearing cap rushes blind hole structure figure.
Fig. 5 takes out forging drawing after the upset of forging deformation operation.
Fig. 6 is that forging deformation operation shears cap trimming structure chart.
Detailed description of the invention
Below in conjunction with specific embodiment and accompanying drawing, the present invention is described in detail.
Cap Forging Technology sheared by core one-level explosive valve, it is characterized in that comprising following concrete technology step:
1, raw material blanking
Carry out blanking according to required size, after blanking completes, one-tenth required form material section, carries out end corner angle abate by material section;
End corner angle abate angle R is 5%-10% of material section diameter; Shear cap for 18 cun, blank size is Ф 380 × 1158, end-beveling R30, round steel or square steel.
2, raw material heating
1) heating furnace heating pre-treatment
Adopt chamber-type heating furnace, need not containing ferritic Austenitic corrosion resistant plate, adopt material to be 0Cr19Ni39 cast steel cushion block, be of a size of 1000mm × 1000mm × 50mm by place mat place mat in stove before shove charge heating,
This material is Austenitic alloy; Avoid directly contacting with ferrite material so that organizing pollution, must isolate with stove a heatable brick bed.
2} shove charge
When furnace temp is not more than 500 DEG C, raw material are carried out shove charge; Avoid with to avoid therefore planting material conducts heat performance poor, the thermal stress that raw material produce is excessive so that ftracture when forging.
3) heat
Be warming up to 800 DEG C of insulations with≤60 DEG C/H, temperature retention time be every millimeter 30 seconds-45 seconds; 800 DEG C insulation after, be 150 DEG C-200 DEG C/H with the rate of heat addition, be heated rapidly to 1020 ~ 1050 DEG C of insulations, temperature retention time be every millimeter 30 seconds-45 seconds;
After 1020 ~ 1050 DEG C of insulations, be heated to 1100 DEG C with equipment maximum heating power (the maximum heating speed of equipment is 200 ~ 250 DEG C/h) and come out of the stove.The temperature of this kind of material is higher than after 1100 DEG C, and crystal grain can be grown up rapidly, so that the mechanical property of forging is poor, and this material is Austenitic organizes and do not change by heat treatment mode, and therefore heating-up temperature can not more than 1100 DEG C.
4) come out of the stove
The raw material heated must be transferred in 60s the appointment station of forging, maximum possible reduces temperature loss
3, forging deformation operation
1) jumping-up
2) forge: comprise and slowly forge and forge fast;
Select 10 tons of free forging electrohydraulic hammers, high temperature alloy at high temperature still has higher intensity and lower plasticity, its deformation resistance is 3 ~ 5 times of common straightcarbon steel, and therefore 10 tons of Single arm selected by the high temperature alloy forging of 1 ton, ensures the forging of heart portion thoroughly the colleague meeting deflection.
Front 5 hammers slowly forge, forging energy is 20%-30%, object is scale removal, and makes the defects such as metal inside dislocation enter into the optimum position of plastic deformation, for ensuing large deformation is prepared with small deformation, < 50 DEG C is wanted in the change of this process temperature, shaping, because this type of material at high temperature plasticity is poor, knuckle must strengthen, so that metal flow, make forging shaping smoothly; Shaping mould put into by raw material after base, forges fast, and it is 100% all-round for forging energy, ensures that forging receives enough strike centre of force portion forgings thoroughly.
3) blind hole is rushed; Rush blind hole to contribute to the Metal Deformation place of concentrating and be full of die cavity, and this material cost is high, rushes blind hole and can save certain material cost.
4) turnover mould forging depanning
5) product Light deformation finishing
Forging energy is controlled by required deflection
4, cool
High-temperature nickel-base alloy material is because of without phase transformation, and slow cooling not only reduces production efficiency, and Slow cooling can make material matrix coarse grains, mechanical property is deteriorated, and pave cooling evenly, therefore adopt the mode paving air cooling after forging, air circulation particularly preferred place cooling must be placed on.）
5, cap separation is sheared after finished product and explosion.
Claims (3)
1. cap Forging Technology sheared by core one-level explosive valve, it is characterized in that comprising following concrete technology step:
A, raw material blanking;
Carry out blanking according to required size, after blanking completes, one-tenth required form material section, carries out end corner angle abate by material section;
B, raw material heat;
1) heating furnace heating pre-treatment;
Adopt chamber-type heating furnace, before shove charge heating, in stove, ferritic Austenitic corrosion resistant plate need do not contained by place mat;
2) shove charge;
When furnace temp is not more than 500 DEG C, raw material are carried out shove charge;
3) heat;
Be warming up to 800 DEG C of insulations with≤60 DEG C/H, temperature retention time be every millimeter 30 seconds-45 seconds; 800 DEG C insulation after, be 150 DEG C-200 DEG C/H with the rate of heat addition, be heated rapidly to 1020 ~ 1050 DEG C of insulations, temperature retention time be every millimeter 30 seconds-45 seconds; After 1020 ~ 1050 DEG C of insulations, come out of the stove to 1100 DEG C with equipment maximum heating power heating, the maximum heating speed of equipment is 200 ~ 250 DEG C/h;
4) come out of the stove;
The raw material heated must be transferred to the appointment station of forging in 60s;
C, forging deformation operation;
1) jumping-up;
2) forge: comprise and slowly forge and forge fast;
Select 10 tons of free forging electrohydraulic hammers, front 5 hammers slowly forge, and forging energy is 20%-30%; Shaping mould put into by raw material after base, forges fast, and it is 100% all-round for forging energy;
3) blind hole is rushed;
4) turnover mould forging depanning;
5) product Light deformation finishing;
Forging energy is controlled by required deflection;
D, cooling;
Pave air cooling mode and carry out cooling processing;
Shear cap after e, finished product and explosion to be separated.
2. cap Forging Technology sheared by core one-level explosive valve according to claim 1, it is characterized in that end corner angle abate angle R is 5%-10% of material section diameter.
3. cap Forging Technology sheared by core one-level explosive valve according to claim 1, it is characterized in that described corrosion resistant plate is 0Cr19Ni39 cast steel cushion block, is of a size of 1000mm × 1000mm × 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958488.3A CN105499477B (en) | 2016-03-04 | 2016-03-04 | Core one-level explosive valve shears cap forging technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510958488.3A CN105499477B (en) | 2016-03-04 | 2016-03-04 | Core one-level explosive valve shears cap forging technology |
Publications (2)
| Publication Number | Publication Date |
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| CN105499477A true CN105499477A (en) | 2016-04-20 |
| CN105499477B CN105499477B (en) | 2017-10-24 |
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Citations (8)
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|---|---|---|---|---|
| EP0087183B1 (en) * | 1982-02-18 | 1987-04-29 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Method to produce a fine-grained object as a finished article consisting of an austenitic, high-temperature strength nickel-base alloy |
| CN101332484A (en) * | 2007-06-25 | 2008-12-31 | 宝山钢铁股份有限公司 | Die forging method of high-temperature alloy |
| CN102019534A (en) * | 2009-09-22 | 2011-04-20 | 上海腾辉锻造有限公司 | Manufacturing method of valve part |
| CN102357633A (en) * | 2011-09-27 | 2012-02-22 | 上海宏钢电站设备铸锻有限公司 | Method for manufacturing nickel-based high-temperature alloy forge piece |
| CN102974741A (en) * | 2012-08-17 | 2013-03-20 | 大连大高阀门股份有限公司 | Forging method of valve cover part of valve |
| CN103071753A (en) * | 2012-08-22 | 2013-05-01 | 昌利锻造有限公司 | Forging method of ball valve stem |
| CN103341580A (en) * | 2013-07-18 | 2013-10-09 | 东方电气集团东方汽轮机有限公司 | Free forging method for medium-pressure combined regulation valve stem workblank of supercritical turbine |
| JP5395516B2 (en) * | 2009-05-29 | 2014-01-22 | 株式会社東芝 | Nickel-based alloy for steam turbine turbine rotor and steam turbine turbine rotor |
-
2016
- 2016-03-04 CN CN201510958488.3A patent/CN105499477B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087183B1 (en) * | 1982-02-18 | 1987-04-29 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Method to produce a fine-grained object as a finished article consisting of an austenitic, high-temperature strength nickel-base alloy |
| CN101332484A (en) * | 2007-06-25 | 2008-12-31 | 宝山钢铁股份有限公司 | Die forging method of high-temperature alloy |
| JP5395516B2 (en) * | 2009-05-29 | 2014-01-22 | 株式会社東芝 | Nickel-based alloy for steam turbine turbine rotor and steam turbine turbine rotor |
| CN102019534A (en) * | 2009-09-22 | 2011-04-20 | 上海腾辉锻造有限公司 | Manufacturing method of valve part |
| CN102357633A (en) * | 2011-09-27 | 2012-02-22 | 上海宏钢电站设备铸锻有限公司 | Method for manufacturing nickel-based high-temperature alloy forge piece |
| CN102974741A (en) * | 2012-08-17 | 2013-03-20 | 大连大高阀门股份有限公司 | Forging method of valve cover part of valve |
| CN103071753A (en) * | 2012-08-22 | 2013-05-01 | 昌利锻造有限公司 | Forging method of ball valve stem |
| CN103341580A (en) * | 2013-07-18 | 2013-10-09 | 东方电气集团东方汽轮机有限公司 | Free forging method for medium-pressure combined regulation valve stem workblank of supercritical turbine |
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| CN105499477B (en) | 2017-10-24 |
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Effective date of registration: 20230717 Address after: Dalian Dagao Valve Co., Ltd., 272 Yaojia Road, Ganjingzi District, Dalian City, Liaoning Province Patentee after: DALIAN DV VALVE Co.,Ltd. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: Dalian Dagao Valve Co., Ltd., 272 Yaojia Road, Ganjingzi District, Dalian City, Liaoning Province Patentee before: DALIAN DV VALVE Co.,Ltd. |