CN1045277A - Vacuum induction remelting method for producing isometric fine crystal ingot - Google Patents
Vacuum induction remelting method for producing isometric fine crystal ingot Download PDFInfo
- Publication number
- CN1045277A CN1045277A CN89100807A CN89100807A CN1045277A CN 1045277 A CN1045277 A CN 1045277A CN 89100807 A CN89100807 A CN 89100807A CN 89100807 A CN89100807 A CN 89100807A CN 1045277 A CN1045277 A CN 1045277A
- Authority
- CN
- China
- Prior art keywords
- electrode
- remelting
- fine crystal
- crystal ingot
- millimeters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a kind of method of vacuum induction remelting method for producing isometric fine crystal ingot, it is characterized in that under vacuum or positive pressure, the metal consumable electrode that can control lifting vertically is placed in the induction coil, under high frequency or electric current of intermediate frequency effect, fusing gradually, form molten drop, fall in the ingot mold that rotates below and solidify again.The invention has the advantages that alloying constituent is even, crystal grain is tiny, stable performance.Realize the good combination of alloy strength and plasticity, improved the alloy low cycle fatigue property.Advantages such as it is simple to have equipment simultaneously, and technological operation is convenient, and is with low cost.
Description
The invention provides a kind of method of vacuum induction remelting method for producing isometric fine crystal ingot.
The method of the axle fine crystal ingot such as producing at present has vacuum arc two electrodes remelting process (also being called the VADER method), and the remelting thermal source of this method is to utilize the heat that discharge generation electric arc sends between two consumable electrodes, as U.S. Pat 4261412.Also has electron beam Continuous Flow smelting process, the melting thermal source heats from electron beam, invent by West Germany LEYBOLD-HERAEVS company, see HStepnon, JHeimerl and RSchumann, be with micro-processor controlled trial production equipment electron beam remelting minor diameter nickel base superalloy ingot with 200KW, about the vacuum metallurgy proceeding of Special Metal melting and processing.(guest cuts down the inferior state of Buddhist nun sunset for 1984 11-12 days in June, Pittsburgh, the U.S., P137).
The object of the present invention is to provide a kind of employing vacuum induction remelting method (hereinafter to be referred as the VIR method) method of axle fine crystal ingot such as to produce, average grain size is less than 1 millimeter, and the remelting thermal source is taken from the induction heat of middle and high frequency power.
The present invention adopts that the vacuum induction remelting legal system is got to wait a fine crystal ingot.Under vacuum or positive pressure, the metal consumable electrode that can control lifting vertically is placed in the induction coil, under high frequency or electric current of intermediate frequency effect, electrode tip is the sensed electrode fusing point that is heated to rapidly, fusing forms molten drop gradually, fall in the ingot mold that rotates below and solidify again, obtain purified, have an ingot casting of tiny equiaxed grain structure uniformly.Its technology comprises electrode preheating and remelting two portions.
The electrode preheating:the surface action of electric current is a distinguishing feature of induction heating method in material-to-be-heated, the high more this collection skin phenomenon of supply frequency is remarkable more, the upper layer that is heated in material-to-be-heated is just thin more, therefore the necessary preheating of consumable electrode in the VIR process, promptly before remelting begins, pass through electrode lifting mechanism, consumable electrode is moved down, slowly pass induction coil with 50～100 millimeters/minute speed, simultaneously, 20～40 kilowatts of by induction of send into the lower-wattage of coil, drop at the bottom of the ingot mold till 5～10 millimeters until consumable electrode, again the fast speed of consumable electrode with 100～200 millimeters/minute moved from bottom to top, 20～40 kilowatts of continue to supply with the lower-wattage of, make the original position before consumable electrode is returned to remelting at last.Between warming up period, the heat that consumable electrode top layer induced current produces can import consumable electrode heart portion effectively into, and consumable electrode top layer and core can melt synchronously when this had just guaranteed remelting.
There is the electric current surface action equally in the heating of employing intermediate frequency power supply, though relax to some extent on degree, along with the expansion of VIR scale, the increase of consumable electrode size, electrode preheating also are necessary.
Reflow process: open fire door, with specification is 350～450 * 30～40 * 8～15(millimeter) clean special-shaped electrode be installed on the electrode lifting mechanism, on swivel base, put ingot mould, and adjustment ingot mould rotating mechanism makes it to be in normal operating conditions, start the relative position that electrode lifting mechanism is adjusted consumable electrode, induction coil and ingot mold, make electrode keep 2～4 millimeters in the gap in lifting process and between the induction coil, keep 3～5 millimeters with the die wall gap on the electrode width edge length direction.Shut door for vacuum chamber, vacuumize, vacuum tightness reaches 2 * 10
-3～5 * 10
-4During mmhg, 20～40 kilowatts of low power.During of high frequency electric source carries out the electrode preheating with the power supply of the malleation remelting, need treat that vacuum tightness reaches requirement in the stove after, closed furnace body, logical argon gas to 0.5～3 normal atmosphere carries out the electrode preheating again.Start the ingot mould rotating mechanism, adjust rotating speed to 60～180 rev/min, 50～90 kilowatts of superpowers of high frequency electric source power with, carries out the consumable electrode remelting, guarantees continuous melting, and molten drop scatters dripple, until the remelting end, cuts off the electricity supply, and broken sky is got ingot.
The invention has the advantages that: make make etc. axle fine crystal ingot tissue eliminated macrosegregation, make alloy ingredient even, stable performance.Because crystal grain is tiny, resistance to deformation is less, has improved the alloy hot workability, owing to homogeneous microstructure, helps realizing the good combination of alloy strength and plasticity, can make inclusion refinement and uniform distribution, improves the alloy low cycle fatigue property.
The present invention makes and waits a fine crystal ingot surface quality good, steel ingot density height owing to take the technological measure of electrode preheating.The present invention still can take the malleation remelting, helps producing a fine crystal ingot that waits that contains the Volatile Elements alloy.
Advantages such as the present invention also has equipment simple, and is easy to operate, with low cost.
Below in conjunction with accompanying drawing, my invention is further specified.
Fig. 1 is a remelting device synoptic diagram of the present invention.(1) be high-frequency induction heating apparatus, (2) are vacuum chamber.All remelting work are all carried out in vacuum chamber, and vacuum chamber is welded with double-deck stainless steel, interior logical water coolant.Vacuum chamber has movable hermatic door and the locking latches of opening and closing, to realize vacuum or malleation remelting.Vacuum chamber one side joint vacuum unit (10), opposite side adopt vacuum seal structure that remelting is joined with induction coil (5) and high frequency electric source (1).Oven body part also is provided with electrode lifting device (3) and ingot mould swivel arrangement (9).Also have viewing window, vacuum measuring device and temperature measuring equipment etc. in addition.
The coupling of shape, the number of turns and metal consumable electrode (4) size of induction coil (5) has a significant impact reflow process.For guaranteeing that each position that remelted alloy drop (6) is dispersed in the ingot mould (8) of rotation uniformly obtains waiting an axle fine-grained steel ingot (7), the induction coil shape should be made odd-shaped, and the induction coil number of turns then should be complementary with power unit, remelted alloy material etc.
The shape of resmelting electrode is corresponding with the induction coil shape, uses special-shaped induction coil, and consumable electrode will be made special-shaped electrode.Special-shaped electrode is when remelting, and molten drop not only can fall from the electrode middle part, and also can fall in the end on long limit, and this has just strengthened the drippage scope of molten drop in ingot mold.Carry out and sufficiently high electrical efficiency for guaranteeing that remelting is working properly, the gap between electrode and the induction coil should remain on 2～4 millimeters.Induction coil will have 250～350 mm distance in the intravital installation site of stove to ingot mold bottom, to guarantee electrode enough preheating length is arranged, and makes remelting normally, carry out fast.The induction coil position is high more, and under strong magnetic field action, it is far away more to depart from the ingot mould center during remelting droplets fall, and this also helps the moulding of steel ingot.
Embodiment: processing parameter sees Table 1 in the experiment.
The optimal processing parameter of table 1 VIR method remelting GH36 alloy
| Project | Processing parameter |
| Electrode size | 350～450 * 30～40 * 8～15(millimeter) |
| The induction coil number of turns | The 3(circle) |
| The ingot mould rotating speed | 60～180(rev/min) |
| Remelting vacuum tightness | 2×10 －3～5×10 －4(mmhg) |
| Argon filling pressure | 0.5～3 (normal atmosphere) |
| Pre-thermal power | 20～40 (kilowatt) |
| Remelting power | 50～90 (kilowatt) |
Claims (4)
1, a kind of method of the axle fine crystal ingot such as producing is characterized in that adopting that the vacuum induction remelting legal system is got and waits a fine crystal ingot.
2, the method for the axle fine crystal ingot such as producing according to claim 1, it is characterized in that under vacuum or positive pressure, the metal consumable electrode that can control lifting vertically is placed in the induction coil, under high frequency or electric current of intermediate frequency effect, electrode tip is the sensed electrode fusing point that is heated to rapidly, fusing forms molten drop gradually, falls in the ingot mold that rotates below and solidifies again.
3, the method for the axle fine crystal ingot such as producing according to claim 1 and 2, it is characterized in that before remelting begins, by electrode lifting mechanism consumable electrode is moved down, pass induction coil with 50～100 millimeters/minute, 20～40 kilowatts of induction coil is sent into the power of, is 5～10 millimeters distances until consumable electrode apart from the ingot mould bottom, the speed of consumable electrode with 100～200 millimeters/minute is moved up again, the electrode preheating is carried out in position before being returned to remelting.
4, the method for the axle fine crystal ingot such as producing according to claim 1 and 2, it is characterized in that the remelting material is a special-shaped electrode, specification is 350～450 * 30～40 * 8～15 millimeters, be installed on the electrode lifting mechanism, electrode and induction coil gap are 2～4 millimeters, electrode width edge length direction and die wall gap are 3～5 millimeters, and vacuum tightness is 2 * 10 in the stove
-3～5 * 10
-4Mmhg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89100807A CN1015476B (en) | 1989-03-01 | 1989-03-01 | Vacuum induction remelting method for producing isometric fine crystal ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89100807A CN1015476B (en) | 1989-03-01 | 1989-03-01 | Vacuum induction remelting method for producing isometric fine crystal ingot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1045277A true CN1045277A (en) | 1990-09-12 |
| CN1015476B CN1015476B (en) | 1992-02-12 |
Family
ID=4854033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89100807A Expired CN1015476B (en) | 1989-03-01 | 1989-03-01 | Vacuum induction remelting method for producing isometric fine crystal ingot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015476B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789954A (en) * | 2012-09-05 | 2012-11-21 | 朱惠冲 | Tungsten electrode with directional crystallization large-grain discharge end and preparation method for tungsten electrode |
| CN107962169A (en) * | 2017-12-08 | 2018-04-27 | 孟静 | The preparation facilities and method of refractory metal base gradient composite material |
-
1989
- 1989-03-01 CN CN89100807A patent/CN1015476B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789954A (en) * | 2012-09-05 | 2012-11-21 | 朱惠冲 | Tungsten electrode with directional crystallization large-grain discharge end and preparation method for tungsten electrode |
| CN102789954B (en) * | 2012-09-05 | 2016-01-20 | 佛山宁宇科技有限公司 | There is tungsten electrode and the preparation thereof of oriented crystallization large grain size discharge end parts |
| CN107962169A (en) * | 2017-12-08 | 2018-04-27 | 孟静 | The preparation facilities and method of refractory metal base gradient composite material |
| CN107962169B (en) * | 2017-12-08 | 2019-07-23 | 山东森宇精工科技有限公司 | The preparation facilities and method of refractory metal base gradient composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015476B (en) | 1992-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3985179A (en) | Electromagnetic casting apparatus | |
| US4004631A (en) | Electromagnetic casting apparatus | |
| EP1254861B1 (en) | Silicon continuous casting method | |
| RU2003117427A (en) | DEVICE AND METHOD FOR REFINING AND CASTING | |
| JP2022501198A (en) | Bearing body anti-friction layer copper alloy filling device and bearing body Bimetal composite material manufacturing method | |
| CN1430035A (en) | Vacumn induction electric arc smelting furnace with quick cooling and quenching | |
| US4305451A (en) | Electroslag remelting and surfacing apparatus | |
| JP3949208B2 (en) | Metal remelting method and apparatus used for manufacturing continuous casting | |
| CN109967703B (en) | Method for continuously and efficiently preparing wide amorphous thin strip with thickness of 80-1500 mu m at high cooling speed | |
| US6003587A (en) | Casting furnace, a casting method and a turbine blade made thereby | |
| CN1045277A (en) | Vacuum induction remelting method for producing isometric fine crystal ingot | |
| CN109595937A (en) | A kind of nonferrous metal smelting furnace | |
| RU2117550C1 (en) | Apparatus for making castings with directed and monocrystalline structure | |
| CN1923409A (en) | Equipment for nonvacuum melting and casting readily oxidizable metal and alloy | |
| JP2914674B2 (en) | Heat dissolution method | |
| US4185682A (en) | Electroslag remelting and surfacing apparatus | |
| JP3603676B2 (en) | Silicon continuous casting method | |
| CN208680474U (en) | A kind of device of electromagnetic energy crystal grain refinement | |
| CN1028074C (en) | Secondary atomizer for double electrode arc melting | |
| KR20110117083A (en) | Process for producing multicrystalline silicon ingots by the induction method and apparatus for carrying out the same | |
| CN209614207U (en) | Electroslag smelting casting blade is servo-actuated with type, is segmented molding machine step by step | |
| JP5579261B2 (en) | Method and apparatus for remelting metal in an electric furnace | |
| EP1112792A2 (en) | Machine for continuous upward casting | |
| CN112048624A (en) | Method for improving component uniformity of nickel-based high-temperature alloy through electron beam circulating overtemperature treatment | |
| CN1031629C (en) | Metal refinery and continuous casting complex device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |