CN101199991B - Gravitational vacuum suction casting forming method - Google Patents
Gravitational vacuum suction casting forming method Download PDFInfo
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- CN101199991B CN101199991B CN200710188545XA CN200710188545A CN101199991B CN 101199991 B CN101199991 B CN 101199991B CN 200710188545X A CN200710188545X A CN 200710188545XA CN 200710188545 A CN200710188545 A CN 200710188545A CN 101199991 B CN101199991 B CN 101199991B
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Abstract
Disclosed is a gravity vacuum suction casting forming method. The steps of the method are that: 1) the metal or the alloy is melted with induction in vacuum condition, and electromagnetic stirring refining is carried out; the resistance furnace preheats the pouring mold; 2) after finishing the vacuum refining, the shield gas is pumped in; 3) vacuumize the lower part of the pouring mold, and quickly pour the liquid metal for mold filling; 4) when the mold cavity is full, close the resistance furnace; after being solidified, open the mold cavity, and the required alloy wires or bar materials can be obtained. The invention melts metals or alloy in vacuum, the suction casting process is carried out in shield gas; thus the defects of oxidation and impurity in the process of the metal material forming are avoided, and the pouring mold is fully preheated before mold filling; the problem that the fluidity of the metal gets bad along with the decreasing of temperature and the metal can not fill mold well is solved. Using the method makes the surface performance of the casting wire material and the bar material excellent, and the mass production can be realized.
Description
Technical field
The invention belongs to casting technology field, relate to a kind of vacuum suction casting forming method, particularly relate to a kind of gravitational vacuum suction casting forming method that is applicable to the silk of producing various metals and alloy, bar etc.
Background technology
Producing metal and alloy silk, method that bar is commonly used has rolling, drawing, swages etc.Shortcomings such as it is long that these methods exist the production cycle, and equipment investment is big, and for some hardness height, the metal or alloy of plasticity difference then is difficult to processing.Adopt vacuum suction casting technique can solve this difficult problem, and once can inhale and cast finished product.The production efficiency height, simple to operate, equipment investment is little.But there are following problem in common gravity suction casting method and antigravity suction casting method:
1, inhaling the material diameter of casting can not be less than Φ 3mm, and length is not more than 400mm.
2, can only inhale one of casting, production efficiency is low at every turn.
3, common gravitational method is inhaled when casting, and the preheat temperature of mold can accurately not controlled, and therefore, the length and the surface quality of the silk of being cast, rod are relatively poor.
4, inhale the casting process and can only operate in atmospheric environment usually, long because of smelting time to the production meeting of the fragile material of some easy oxidations, volatilization is serious and cause the change of chemical analysis.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of production efficiency height is provided, gravitational vacuum suction casting forming method easy and simple to handle makes it be widely applied to the production of high rigidity, inductile metal and alloy material silk, bar.
To achieve these goals, the technical solution used in the present invention is: a kind of gravitational vacuum suction casting forming method is characterized in that steps of the method are:
(1) metal or alloy is put into vacuum induction melting furnace, vacuumize and carry out induction melting and electromagnetic agitation refining, well formula resistance furnace carries out preheating to mold;
(2) after the concise end of metal or alloy vacuum, in vacuum induction melting furnace, feed protective gas;
(3) mold bottom is vacuumized, and pour molten metal into rapidly, metal bath is inhaled under the effect of fair, melt deadweight and protective gas pressure in vacuum, is full of die cavity rapidly;
(4) after die cavity was full of, closed-in well formula resistance furnace waited and has solidified, and opens die cavity, just obtains desired alloy wire or bar.
The vacuum induction melting temperature is 1200-1700 ℃ described in the step (1), refining mixing time 5～15min; The preheat temperature of well formula resistance furnace described in the step (1) can be regulated between 500～1000 ℃.
The protective gas that feeds in the step (2) is N
2Or Ar, the pressure of protective gas is 0.05～0.1Mpa.
Described mold material therefor is quartz ampoule or other refractory material, and each mold is made up of 100～120 die cavities; The vacuum of die cavity is regulated between 0.01～0.03Mpa described in the step (3); It is 5～30s that metal bath described in the step (3) is full of the time of described die cavity.
The present invention compared with prior art has the following advantages: the present invention is an induction melting metal or alloy in a vacuum; and charge into protective gas when inhaling casting; avoided the oxidation of metal material in forming process; defective such as be mingled with; mold obtains abundant preheating by resistance furnace; upper and lower temperature difference is little; the liquid metal cooling that sucks is slow; the flowability that can overcome metal can not well be filled the type problem with the reduction of temperature; and mold comprises a plurality of die cavities; once just can inhale casting rhizoids up to a hundred; bar; can prepare the good metal or alloy silk of surface property by this method; bar is accomplished scale production.
Description of drawings
Fig. 1 is the structural representation of equipment required for the present invention.
Fig. 2 is the structural representation of mold in the equipment required for the present invention.
The specific embodiment
In conjunction with Fig. 1, Fig. 2, comprise mechanical pump 1 in the inventive method equipment needed thereby, vacuum tank 2; vacuum meter 3, high vacuum butterfly valve 4,5, vacuum breaker 6; vacuum passage 7; vacuum induction melting furnace 8, induction coil 9, crucible 10; protective gas passage 11; well formula resistance furnace 12, rising head 13, mold 14 and mold connector 15.Wherein mechanical pump 1 links to each other with vacuum tank 2 by high vacuum butterfly valve 4, and vacuum passage 7 is connected on the vacuum tank 2 by control valve 6, and vacuum meter 3 is installed in the bypass of vacuum tank 2.Crucible 10 is placed on the middle of induction coil 9, and protective gas passage 11 is arranged on the top of induction melting furnace 8.Rising head 13 is placed on the table of well formula resistance furnace 12, and mold is placed on by mold connector 15 in the burner hearth of well formula resistance furnace 12, links to each other with vacuum passage 7 below the mold connector 15.
Embodiment 1
With Cu-Ni-Si-Fe-B (Ni27%～30%; Si1.5%～2%; B＜0.2%; Fe＜1.5%; surplus is Cu) alloy puts into vacuum melting furnace 8; vacuumize and carry out induction melting and electromagnetic agitation refining; refining time is 5min, and 12 pairs of molds of well formula resistance furnace 14 carry out preheating, when mold 14 temperature reach 750 ℃; feed Ar gas from protective gas passage 11; make its pressure reach 0.07Mpa, connect mechanical pump 1 then, open 4 pairs of vacuum tank 2 extracting vacuum of high vacuum butterfly valve; behind the vacustat of vacuum tank 2; open high vacuum butterfly valve 5 and vacuum breaker 6, it is 0.03Mpa that casting vacuum is inhaled in control, then the alloy liquid in the crucible 10 is poured into rapidly in the rising head 13; alloy melt is inhaled under the effect of fair and melt deadweight in vacuum, is full of die cavity rapidly.After vacuum is filled type retention time 5s, close 12, one of vacuum breaker 6 and well formula resistance furnaces and inhale the casting end cycle.Deng having solidified, mold 14 is proposed, open die cavity, just obtain desired Cu-Ni-Si-Fe-B alloy silk.Mold connector 15 can conveniently plug, and after every suction casting was a collection of, interchangeable another mold of inserting was operated by said process, can realize continuous production.
With Ni-Cr-Si-Fe-B alloy raw material (Cr6%～8%; Si4%～5%; B2.75%～3.5%; Fe2.5%～3.5%; surplus is Ni) put into vacuum melting furnace 8; vacuumize and carry out induction melting and electromagnetic agitation refining; refining time is 5min, and 12 pairs of molds of well formula resistance furnace 14 carry out preheating, when mold 14 temperature reach 800 ℃; feed Ar gas from protective gas passage 11; make its pressure reach 0.07Mpa, connect mechanical pump 1 then, open 4 pairs of vacuum tank 2 extracting vacuum of high vacuum butterfly valve; behind the vacustat of vacuum tank 2; open high vacuum butterfly valve 5 and vacuum breaker 6, control vacuum is 0.03Mpa, then the alloy liquid in the crucible 10 is poured into rapidly in the rising head 13; alloy melt is inhaled under the effect of fair and melt deadweight in vacuum, is full of die cavity rapidly.Behind the vacuum retention time 5s, close 12, one of vacuum breaker 6 and well formula resistance furnaces and inhale the casting end cycle.Deng having solidified, mold 14 is proposed, open die cavity, just obtain desired Ni-Cr-Si-Fe-B alloy silk.Mold connector 15 can conveniently plug, and after every suction casting was a collection of, interchangeable another mold of inserting was operated by said process, can realize continuous production.
With Co-Cr-W-C alloy raw material (C0.98%; 29.23%; W4.93%; the Co surplus) puts into vacuum melting furnace 8; vacuumize and carry out induction melting and electromagnetic agitation refining; refining time is 10min; 12 pairs of molds of well formula resistance furnace 14 carry out preheating; when mold 14 temperature reach 900 ℃, feed N2 gas from protective gas passage 11, make its pressure reach 0.09Mpa; connect mechanical pump 1 then; open 4 pairs of vacuum tank 2 extracting vacuum of high vacuum butterfly valve, behind the vacustat of vacuum tank 2, open high vacuum butterfly valve 5 and vacuum breaker 6; control vacuum is 0.01Mpa; then the alloy liquid in the crucible 10 is poured into rapidly in the rising head 13, alloy melt is inhaled under the effect of fair and melt deadweight in vacuum, is full of die cavity rapidly.After vacuum is filled type retention time 10s, close 12, one of vacuum breaker 6 and well formula resistance furnaces and inhale the casting end cycle.Deng having solidified, mold 14 is proposed, open die cavity, just obtain desired Co-Cr-W-C alloy silk.Mold connector 15 can conveniently plug, and after every suction casting was a collection of, interchangeable another mold of inserting was operated by said process, can realize continuous production.
Claims (8)
1. gravitational vacuum suction casting forming method is characterized in that steps of the method are:
(1) metal or alloy is put into vacuum induction melting furnace, vacuumize and carry out induction melting and electromagnetic agitation refining, well formula resistance furnace carries out preheating to mold, and mold is placed on by the mold connector in the burner hearth of well formula resistance furnace, links to each other with vacuum passage below the mold connector;
(2) after the concise end of metal or alloy vacuum, in vacuum induction melting furnace, feed protective gas;
(3) mold bottom is vacuumized, and pour molten metal into rapidly, metal bath is inhaled under the effect of fair, melt deadweight and protective gas pressure in vacuum, is full of die cavity rapidly;
(4) after die cavity was full of, closed-in well formula resistance furnace waited and has solidified, and opens die cavity, just obtains desired alloy wire or bar.
2. a kind of gravitational vacuum suction casting forming method according to claim 1 is characterized in that 1200-1700 ℃ of vacuum induction melting temperature described in the step (1), refining mixing time 5～15min.
3. a kind of gravitational vacuum suction casting forming method according to claim 1 is characterized in that the preheat temperature of well formula resistance furnace described in the step (1) is regulated between 500～1000 ℃.
4. a kind of gravitational vacuum suction casting forming method according to claim 1 is characterized in that the protective gas that feeds in the step (2) is N
2Or Ar.
5. a kind of gravitational vacuum suction casting forming method according to claim 1 is characterized in that the pressure of the protective gas of feeding in the step (2) is 0.05～0.1Mpa.
6. a kind of gravitational vacuum suction casting forming method according to claim 1 it is characterized in that described mold material therefor is a quartz ampoule, and each mold is made up of 100～120 die cavities.
7. a kind of gravitational vacuum suction casting forming method according to claim 1 is characterized in that the vacuum of die cavity described in the step (3) is regulated between 0.01～0.03Mpa.
8. a kind of gravitational vacuum suction casting forming method according to claim 1 is characterized in that the time that metal bath described in the step (3) is full of described die cavity is 5～30s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710188545XA CN101199991B (en) | 2007-12-10 | 2007-12-10 | Gravitational vacuum suction casting forming method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710188545XA CN101199991B (en) | 2007-12-10 | 2007-12-10 | Gravitational vacuum suction casting forming method |
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| CN101199991A CN101199991A (en) | 2008-06-18 |
| CN101199991B true CN101199991B (en) | 2010-07-21 |
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| CN200710188545XA Expired - Fee Related CN101199991B (en) | 2007-12-10 | 2007-12-10 | Gravitational vacuum suction casting forming method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391295B (en) * | 2008-11-12 | 2011-07-20 | 丁东胜 | Metal material casting system and method |
| CN101559484B (en) * | 2009-05-27 | 2010-12-08 | 重庆建设摩托车股份有限公司 | Vacuum gravity casting method of aircraft engine block |
| FI124164B (en) | 2011-05-27 | 2014-04-15 | Aalto Korkeakoulusäätiö | Arc melting and tipping molding device |
| CN103506605A (en) * | 2012-06-25 | 2014-01-15 | 无锡市蠡湖铸业有限公司 | Sprue-free vacuum sucking and injecting equipment of manipulator |
| CN106141100A (en) * | 2015-04-14 | 2016-11-23 | 明安国际企业股份有限公司 | The casting method of glof club head and Casting Equipment |
| CN106424662B (en) * | 2016-11-25 | 2018-07-10 | 西北有色金属研究院 | A kind of anti-gravity suction pouring prepares the device and method of cobalt-base alloy welding wire |
| CN109351946B (en) * | 2018-12-03 | 2024-03-26 | 湖南文昌新材科技股份有限公司 | Vacuum electromagnetic stirring suction casting system for composite material |
| CN116790925A (en) * | 2023-08-29 | 2023-09-22 | 成都虹波实业股份有限公司 | Casting method of cobalt-chromium-molybdenum welding wire thin rod |
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