CN105964850A - Extrusion molding method of nickel based alloy sphere for valve - Google Patents
Extrusion molding method of nickel based alloy sphere for valve Download PDFInfo
- Publication number
- CN105964850A CN105964850A CN201610432818.XA CN201610432818A CN105964850A CN 105964850 A CN105964850 A CN 105964850A CN 201610432818 A CN201610432818 A CN 201610432818A CN 105964850 A CN105964850 A CN 105964850A
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- China
- Prior art keywords
- blank
- extrusion molding
- extrusion
- forging
- spheroid
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- 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
- 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
- B21K1/24—Making machine elements valve parts valve bodies; valve seats
Abstract
The invention relates to an extrusion molding method of a nickel based alloy sphere for a valve. The extrusion molding method comprises the steps that technological parameters are determined through computer numerical simulation; a blank is firstly preheated and then continues to be heated to the forging temperature; a program is set through extrusion equipment; running is carried out for extrusion; pressure maintaining is carried out after mold combining of molds is completed, and a puncher pin carries out extrusion to a set position; the molds and the puncher pin reset, and the sphere blank is demolded; and blank air cooling, heat treatment and machining are carried out. The extrusion molding method has the beneficial effects that one-time heating extrusion molding is achieved, and a nickel based alloy is prevented from cracking and alloy element impoverishment in the forging process; metal flow line continuity is guaranteed, and corrosion resisting performance is improved; in the extrusion molding process, deformation of materials is large, extremely sufficient recrystallization is carried out in the deformation process, grains are refined, and the phenomena of coarse grains and mixed grains happening in the free forging process and the mold forging process are avoided; and the material utilization rate is high, machining work hours are few, and the production efficiency can be effectively improved.
Description
Technical field
The present invention relates to valve body processing technique field, the extrusion forming method of a kind of valve nickel-base alloy spheroid.
Background technology
Nickel-base alloy is a kind of alloy having heat stability and heat resistance concurrently, is mainly used in the hot junction equipment such as Aeronautics and Astronautics.Along with the development of science and technology, high temperature alloy especially nickel-base alloy is more and more extensive in the application of the industry such as electric power, petroleum and petrochemical industry.
Ball valve is a kind of valve being most widely used at present, and spheroid is the key element of ball valve.Along with greatly developing of supercritical, ultra supercritical thermoelectricity and nuclear power, corrosion resistance and resistance to elevated temperatures to valve particularly spheroid itself propose more strict requirements.Common heat resisting steel, such as F91, F92 and rustless steel, such as F316, F304 etc., can not meet related request.Therefore, the spheroid of nickel-base alloy becomes a lot of hot junctions equipment and the first-selection of anti-corrosion equipment.
Nickel-base alloy alloy element is high, and forging interval is short, resistance of deformation is big.The phenomenons such as existing high temperature alloy spheroid manufacturing process is by open die forging, die forging, many fire time forging and moldings, the most cracking in forging process, mixed crystal, cause product rejection.
Summary of the invention
The present invention is directed to the deficiency in existing high temperature alloy spheroid process for making, it is provided that the extrusion forming method of a kind of valve nickel-base alloy spheroid.Can shape close to the spheroid blank of part shape by a fire time, it is to avoid the phenomenons such as coarse grains that heating for multiple times causes, mixed crystal, substantially increase the qualification rate of product；The most this extrusion forming method ensure that the seriality of metal streamline, and mechanical performance and the corrosion resisting property of spheroid are greatly improved；Moreover, this method also a saving raw material, decreases machining man-hour, improves production efficiency.
For achieving the above object, the present invention is by the following technical solutions:
The extrusion forming method of a kind of valve nickel-base alloy spheroid, comprises the following steps:
(1) Computer Numerical Simulation is used to determine required technological parameter during spheroid extrusion molding；
(2) sawing；
(3) blank is preheating to 100 DEG C, at surface smear lubricant and binding agent, and adds Soft Roll set, then continues blank to be heated to forging temperature 1180 DEG C ± 20 DEG C；
(4) mould is installed and is put in place, and preheating temperature reaches more than 400 DEG C, and mould is sprayed lubricant；
(5) multi-function metal extruder program setting: the up demoulding → forging demoulding of Ccope closing machine → horizontal punch extruding → upper mold → horizontal punch resets, wherein upper mold uses Stress control, and drift uses Bit andits control；
(6) blank after heating puts into mold cavity center after burner hearth takes out, and transfer time is less than one minute；
(7) extruding is run: after mould completes matched moulds, pressurize → drift extrudes to setting position；
(8) mould resets, and drift resets, the spheroid blank demoulding；
(9) blank air cooling；
(10) blank heat treatment and machining.
Using the present invention of technique scheme, compared with prior art, its advantage is:
1. in extrusion process, blank is shaped by three-dimensional compressive stress, improves the mechanical performance of spheroid；
The most once add hot-pressed, efficiently avoid nickel-base alloy and cracking and alloying element impoverishment occur in forging process, it is ensured that metal streamline seriality, improve decay resistance；
3. in extrusion process, the deflection of material is big, carried out extremely sufficiently recrystallization, refined crystal grain in deformation process, it is to avoid the coarse grains occurred in open die forging, die forging process and the phenomenon of mixed crystal；
3. the method stock utilization is high, and machining is few for man-hour, can be effectively improved production efficiency.
Accompanying drawing explanation
Fig. 1 is spheroid extrusion structural representation；
Fig. 2 is spheroid extrusion molding schematic flow sheet；
In figure: 1-lower mold；2-drift；3-blank；4-upper mold, 5-forging.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and purpose is only that and is more fully understood that present invention, and therefore, the cited case is not limiting as protection scope of the present invention.
Embodiment 1: material is Inconel625, specification is the spheroid of DN80.
(1) by computer numerical simulation determine a kind of material be Inconel625, specification be the technical parameter such as following table of DN80 spheroid extrusion:
Table 1 extrusion technique parameter
| Model | Blank diameter | Forge weight | Initial forging temperature | Final forging temperature |
| DN80 | Φ90 mm | 6.5 kg | 1180 ℃ | ≥800 ℃ |
(2) sawing machine blanking, billet weight 6.4kg-6.7kg(elevation references 119.2mm-124.8mm are used)；
(3) blank is first preheating to 100 DEG C, then smears lubricant and binding agent in blank surface, and adds Soft Roll set, then by blank heating to 1180 DEG C ± 20 DEG C；
(4) mould is installed and is put in place, and preheating temperature reaches more than 400 DEG C；
(5) using 4000T multi-function metal extruder, set extruding program, upper mold uses Stress control, and drift uses Bit andits control；
(6) blank after heating puts into mold cavity center after burner hearth takes out, and transfer time not can exceed that one minute；
(7) extruding is run: matched moulds pressurize → drift runs to specify position → upper mold up, and forging demoulding → drift reset → upper mold resets；
(8) air cooling after forging；
(9) heat treatment: 1000 DEG C × 60min of annealing schedule；
(10) blank surface carries out Shot Blasting；
(11) machining: according to the part drawing of product, be machined out having produced qualified forging, the operation of processing probably includes following four parts: rough turn finish turning corase grind refines, and ensures that product meets the requirement of each size and roughness after having refined.
Embodiment 2: material is Incoloy825, specification is the spheroid of DN200.
(1) by computer numerical simulation determine a kind of material be Incoloy825, specification be the art parameter such as following table of spheroid extrusion of DN200:
Table 2 extrusion technique parameter
| Model | Blank diameter | Forge weight | Initial forging temperature | Final forging temperature |
| DN200 | Φ200 mm | 130 kg | 1200 ℃ | ≥800 ℃ |
(2) sawing machine blanking, billet weight 129kg-131kg(elevation references 486.7mm-494.3mm are used)；
(3) blank is first preheating to 100 DEG C, then smears lubricant and binding agent in blank surface, and adds Soft Roll set, then by blank heating to 1180 DEG C ± 20 DEG C；
(4) mould is installed and is put in place, and preheating temperature reaches more than 400 DEG C；
(5) using 12000T multi-function metal extruder, set extruding program, upper mold uses Stress control, and drift uses Bit andits control；
(6) blank after heating puts into mold cavity center after burner hearth takes out, and must not exceed one minute transfer time；
(7) extruding is run: matched moulds pressurize → drift runs to specify position → upper mold up, and forging demoulding → drift reset → upper mold resets；
(8) air cooling after forging；
(9) heat treatment: annealing schedule 940 DEG C ± 10 DEG C；
(10) blank surface carries out Shot Blasting；
(11) machining: according to the part drawing of product, be machined out having produced qualified forging, the operation of processing probably includes following four parts: rough turn finish turning corase grind refines, and ensures that product meets the requirement of each size and roughness after having refined.
The foregoing is only the embodiment that the present invention is the most feasible, not thereby limit to the interest field of the present invention, the equivalence change that all utilization description of the invention and accompanying drawing content thereof are made, within being both contained in the interest field of the present invention.
Claims (1)
1. the valve extrusion forming method of nickel-base alloy spheroid, it is characterised in that comprise the following steps:
(1) Computer Numerical Simulation is used to determine required technological parameter during spheroid extrusion molding；
(2) sawing；
(3) blank is preheating to 100 DEG C, at surface smear lubricant and binding agent, and adds Soft Roll set, then continues blank to be heated to forging temperature 1180 DEG C ± 20 DEG C；
(4) mould is installed and is put in place, and preheating temperature reaches more than 400 DEG C, and mould is sprayed lubricant；
(5) multi-function metal extruder program setting: the up demoulding → forging demoulding of Ccope closing machine → horizontal punch extruding → upper mold → horizontal punch resets, wherein upper mold uses Stress control, and drift uses Bit andits control；
(6) blank after heating puts into mold cavity center after burner hearth takes out, and transfer time is less than one minute；
(7) extruding is run: after mould completes matched moulds, pressurize → drift extrudes to setting position；
(8) mould resets, and drift resets, the spheroid blank demoulding；
(9) blank air cooling；
(10) blank heat treatment and machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610432818.XA CN105964850A (en) | 2016-06-17 | 2016-06-17 | Extrusion molding method of nickel based alloy sphere for valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610432818.XA CN105964850A (en) | 2016-06-17 | 2016-06-17 | Extrusion molding method of nickel based alloy sphere for valve |
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| CN105964850A true CN105964850A (en) | 2016-09-28 |
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| CN201610432818.XA Pending CN105964850A (en) | 2016-06-17 | 2016-06-17 | Extrusion molding method of nickel based alloy sphere for valve |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694791A (en) * | 2016-12-12 | 2017-05-24 | 陕西宏远航空锻造有限责任公司 | Crack control and forming method for large and medium-sized GH141 alloy annular forged piece |
| CN107671221A (en) * | 2017-11-27 | 2018-02-09 | 二十二冶集团精密锻造有限公司 | The not shaping dies and manufacturing process of equal tee valve body |
| CN107671217A (en) * | 2017-11-21 | 2018-02-09 | 四川凯茨阀门制造有限公司 | A kind of flanged ball valve valve body forging forming method and its base mould of use |
| CN107876675A (en) * | 2017-11-21 | 2018-04-06 | 四川凯茨阀门制造有限公司 | A kind of flanged ball valve manufacture method |
| CN110252936A (en) * | 2019-07-29 | 2019-09-20 | 浙江联大锻压有限公司 | Ball valve core forging technology |
| CN110977625A (en) * | 2019-12-30 | 2020-04-10 | 济南沃德汽车零部件有限公司 | Method for improving wear resistance of conical surface of valve disc and reducing surface roughness |
| CN112275987A (en) * | 2020-10-12 | 2021-01-29 | 中南大学 | Die and die forging method for forming three-way part through multidirectional die forging |
| CN116393650A (en) * | 2023-06-07 | 2023-07-07 | 陕西长羽航空装备股份有限公司 | Technology for preparing gear based on metal forging heating treatment |
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| CN204075040U (en) * | 2014-10-31 | 2015-01-07 | 二十二冶集团精密锻造有限公司 | The mould structure of multi-ram forging valve body forging |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694791A (en) * | 2016-12-12 | 2017-05-24 | 陕西宏远航空锻造有限责任公司 | Crack control and forming method for large and medium-sized GH141 alloy annular forged piece |
| CN107671217A (en) * | 2017-11-21 | 2018-02-09 | 四川凯茨阀门制造有限公司 | A kind of flanged ball valve valve body forging forming method and its base mould of use |
| CN107876675A (en) * | 2017-11-21 | 2018-04-06 | 四川凯茨阀门制造有限公司 | A kind of flanged ball valve manufacture method |
| CN107671221A (en) * | 2017-11-27 | 2018-02-09 | 二十二冶集团精密锻造有限公司 | The not shaping dies and manufacturing process of equal tee valve body |
| CN110252936A (en) * | 2019-07-29 | 2019-09-20 | 浙江联大锻压有限公司 | Ball valve core forging technology |
| CN110977625A (en) * | 2019-12-30 | 2020-04-10 | 济南沃德汽车零部件有限公司 | Method for improving wear resistance of conical surface of valve disc and reducing surface roughness |
| CN112275987A (en) * | 2020-10-12 | 2021-01-29 | 中南大学 | Die and die forging method for forming three-way part through multidirectional die forging |
| CN112275987B (en) * | 2020-10-12 | 2021-10-22 | 中南大学 | Die and die forging method for forming three-way part through multidirectional die forging |
| CN116393650A (en) * | 2023-06-07 | 2023-07-07 | 陕西长羽航空装备股份有限公司 | Technology for preparing gear based on metal forging heating treatment |
| CN116393650B (en) * | 2023-06-07 | 2023-08-18 | 陕西长羽航空装备股份有限公司 | Technology for preparing gear based on metal forging heating treatment |
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Application publication date: 20160928 |
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