CN102776390A - Method for producing titanium slabs efficiently - Google Patents
Method for producing titanium slabs efficiently Download PDFInfo
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- CN102776390A CN102776390A CN2012102226910A CN201210222691A CN102776390A CN 102776390 A CN102776390 A CN 102776390A CN 2012102226910 A CN2012102226910 A CN 2012102226910A CN 201210222691 A CN201210222691 A CN 201210222691A CN 102776390 A CN102776390 A CN 102776390A
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000010936 titanium Substances 0.000 title claims abstract description 54
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000010894 electron beam technology Methods 0.000 claims abstract description 119
- 239000000463 material Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000002844 melting Methods 0.000 claims description 74
- 230000008018 melting Effects 0.000 claims description 74
- 238000012360 testing method Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 13
- 238000007499 fusion processing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000007670 refining Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000010583 slow cooling Methods 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005554 pickling Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 7
- 238000003723 Smelting Methods 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 3
- 239000013590 bulk material Substances 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 16
- 238000005242 forging Methods 0.000 description 12
- 239000004615 ingredient Substances 0.000 description 12
- 239000000155 melt Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 9
- 238000005266 casting Methods 0.000 description 8
- 239000007859 condensation product Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 230000003203 everyday effect Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 210000003491 skin Anatomy 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 210000002615 epidermis Anatomy 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for producing titanium slabs efficiently. Electron beam cold hearth furnaces of six electron guns are used, raw materials of which components are selected are placed in bulk material feeders or bar material feeders of the electron beam cold hearth furnaces, smelting is conducted, then obtained cast ingots are cooled and are discharged out of the furnace, and finished products are obtained. According to the method, the raw materials in an original state are used directly for smelting, crushing of recycled materials, mixing of titanium sponge materials, electrode block pressing and electrode welding are avoided, slab ingots smelted through optimization design are two cast ingots of 200*1290*5000mm which are produced in one furnace, the weight is about 12 tons, and the slab ingots are not required to be smelted twice or to be forged can be used in rolling, so that the production flow and the production period are shortened, the production cost is reduced, and the efficiency is improved greatly.
Description
Technical field
The present invention relates to a kind of materials processing technology, particularly a kind of method of High-efficient Production titanium slab.
Background technology
Prior art mainly is the forged method of VAR melting billet+cogging.(VAR) carries out melting through vacuum consumable electrode arc furnace, and this kind method need be broken into reclaimed materials the bits shape and mixes with Titanium Sponge 40-60 mesh, is pressed into electrode block again; In vacuum welding equipment, weld, carry out vacuum arc fumace (VAR) melting once, secondary smelting or even three meltings then, the ingot casting after the melting is a billet; Forge after the machining; Need pass through the forging of several fire time again, its forging is become the slab of rectangular parallelepiped, just can be used for board materials production.And the planeness of forging slab is poor, the surface oxidation bed thickness, and yield rate is low.Therefore not only the raw material shape is restricted for traditional method, and processing charges is high, complex procedures, and long flow path, and through after melting-forging, the utilization ratio of material is low.
Titanium belongs to infusibility, difficult deformable metal, because the activity of titanium, at high temperature as easy as rolling off a log and gas reactions such as oxygen, nitrogen are polluted metallic titanium and lost original good process performance and mechanical property.Under atmospheric condition, forge and add trade union and form thick zone of oxidation, and it is wayward to forge the dimensional precision of slab, the amount of machining that before rolling, carries out is very big, does not satisfy the requirement of near-net-shape.The manufacturing process's complicacy and the lumber recovery of titanium slab are low.The manufacturing cost height of Titanium Sponge 40-60 mesh is one of high reason of titanium processing material price, and expensive processing charges and the low titanium especially of material use efficiency processed the high major cause of material price in the course of processing.So, the method for inventing a kind of High-efficient Production titanium slab, the raw material of employing virgin state, the processing charges of reduction pilot process, the slab of acquisition near-net-shape, the utilization ratio that improves material is the important channel of raising the efficiency, reducing cost.。
Summary of the invention
The technical problem of the solution that the present invention solves is to have introduced a kind of method of High-efficient Production titanium slab, directly uses the raw material of virgin state to carry out melting, has avoided reclaimed materials broken, Titanium Sponge 40-60 mesh batch mixing, electrode block compacting, the weldering system of electrode; Adopt the process method of " EB melting+High-efficient Production ", it is even to obtain chemical ingredients, and foreign matter content is low, and surface quality is good, and slab planeness and linearity all are superior to forging slab, and amount of machining is little, the slab that yield rate is high.
For the purpose that realizes solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of method of High-efficient Production titanium slab comprises using to have the electron-beam cold bed furnace of 6 electron beam gun, and wherein 1#, 2# electron beam gun work area are the melting cold bed; 3#, 4# electron beam gun work area are the refining cold bed, and 5#, 6# electron beam gun work area are overflow cold bed and 1#, 2# mold, wherein the corresponding 1# mold of 5# rifle; The corresponding 2# mold of 6# rifle;, 1#, 2#, 3# rifle be by the GIP time variable control of 1# computer, and 4#, 5#, 6# rifle are by the GIP time variable control of 2# computer; The GIP program of two computers is set the electron beam gun step respectively, it is characterized in that:
(1), with raw material Titanium Sponge 40-60 mesh, electrode block, block reclaimed materials or bits shape reclaimed materials, directly pack in the rotary drum feeder of electron-beam cold bed furnace or put into the bar feeder of electron-beam cold bed furnace in the titanium system bar box of packing into through feeding system; Wherein reclaimed materials needs the sandblast pickling, could use then;
(2), with working chamber, the feed compartment of electron-beam cold bed furnace with draw the ingot chamber to be evacuated to (1～8) * 10
-2Pa; (3), then open and draw ingot chamber plate valve, will draw the ingot heelpiece to rise up in the water jacketed copper crucible;
(4), subsequently feed in raw material at every turn all need exit again, material loading is evacuated to (1～8) * 10
-2Pa;
(5), open 1#, 2#, 3#, 4#, 5#, 6# electron beam gun, select " positioning of beam " step, the readability and the angle of each electron beam gun working order and stroboscope are confirmed.
(6), 1#, 2#, 3#, 4#, 5#, 6# electron beam gun GIP are transferred to " preheating " step, the titanium scull in fusing cold bed, refining cold bed or the overflow cold bed is carried out slow preheating and make its slow expansion.
(7), treat on the scull to form the molten bath passage, begin 1#, 2#, 3#, 4#, 5#, 6# rifle GIP are transferred to " testing current step ", to electron beam gun the emission maximum electric current that can reach test; Through testing current, confirm the working order of electron beam gun under big electric current; This is owing to electron beam gun after this step is high-power many, confirms the working order of electron beam gun under big electric current through testing current, can avoid because of the electron beam gun slab ingot quality problems that job insecurity causes under big electric current.
(8), 1#, 2#, 3# electron beam gun GIP are transferred to " continue melting " step, utilize big electric current that raw material is melted; This step, melts raw material under lasting feed state through 1#, 2#, 3# rifle, and the setting of this process figure and optimization have directly determined melting rate, can optimize through the electron beam gun scanning pattern and improve melting efficiency.
(9), treat the titanium flow to the crucible place, 4#, 5#, 6# electron beam gun GIP are transferred to " filling crucible " step, heighten the energy of 5#, 6# electron beam gun; Earlier the crucible heelpiece is filled full; 4#, 5#, 6# electron beam gun GIP are transferred to " continuing melting " step, improve the melting speed of 1#, 2#, 3# rifle, and the energy of 5#, 6# rifle is set; The superheating temperature that makes crucible titanium liquid begins automatically ingot pulling then at 200 ℃.
Step passes through to improve the melting speed of 1#, 2#, 3# rifle " to continue melting ", and the energy of 5#, 6# rifle is set, and the superheating temperature that makes crucible titanium liquid guarantees the flat bloom surface good quality and reduces inner grain size at 200 ℃." continue melting " step is meant that the titanium flow goes under the crucible state, and electron beam gun is to the scanning process step of crucible.
(10), in continuing fusion process, in the setting program of 5#, 6# rifle edge graph shape is clearly arranged also in " continuing melting " step, constantly crucible limit portion is scanned.Like this, fall into the titanium condensation product that prevents limit portion growth and to form condensation product in the crucible and be mingled with, thereby have influence on the internal soundness of slab ingot.
(11), if continue in the fusion process; Owing to causing melting, the equipment reason interrupts; Then 1#, 2#, 3# electron beam gun GIP are transferred to " preheating " step, 4#, 5#, 6# electron beam gun GIP are transferred to " melting interrupts continuing heating steps ", the 56# rifle continues heating to the slab ingot top; After the equipment of treating recovers, then continue melting, and the cutout seam crossing does not influence the quality of final titanium ingot.The enforcement of this step, purpose are to eliminate the influence of cutout to the slab ingot quality, have avoided the imperfections that causes because of cutout.
(12), wait to draw the length that ingot length reaches to be needed, stop charging, and close 1#, 2#, 3#, 4# electron beam gun, stay 5#, 6# electron beam gun.
(13), 4#, 5#, 6# electron beam gun GIP being transferred to " clear limit " step uses clear scan edge figure that crucible runner and crucible limit portion are cleared up.
(14), 4#, 5#, 6# electron beam gun GIP are transferred to " heat-sealing top " step the slab ingot top are sealed the top, make its slow cooling, prevent cooling fast and cause inner shrinkage cavity shrinkage porosity.The creativeness of this step has been to eliminate the slab ingot top because of the defective that cause for quality must excise, and adopts after this step, and the slab ingot top can not excised.
(15), heat-sealing top finishes, all electron beam gun quit work, vacuum system keeps operation, slab ingot is drawing the indoor cooling of ingot more than 10 hours, blow-on venting then goes out ingot.
Specific as follows: the slab size of this patent design is slab one of key efficiently.This patent is designed to two on 200 * 1290 * 5000mm ingot casting of a stove two ingots, about 12 tons of weight.Compare with the slab of normally used 400-500mm thickness, the slab of 200mm need not to carry out the operation of roughing cogging again, can directly be used for the finish rolling operation.The operation of roughing cogging is meant on roughing mill by the 400-500mm split rolling method to 200mm, and carries out the surface-treated operation.
When producing ingot casting, the VAR method must suppress electrode; Can only use block raw material through processing; And in order to guarantee the strength of joint of electrode, adding reclaimed materials can not surpass 30%, and prepared electrode block also need be welded into a large electrode and could use in vacuum welding equipment.And the electron beam cold hearth melting feeding manner is unrestricted, can use the raw material of virgin states such as Titanium Sponge 40-60 mesh, electrode block, block reclaimed materials or bits shape reclaimed materials, and can use 100% reclaimed materials, can reduce titanium material production cost and tooling cost in early stage like this.Adopt the VAR stove need carry out repeatedly melting and could obtain the uniform ingot casting of composition, and the electron-beam cold bed furnace melting once gets final product.Ingot casting after the melting of VAR stove is a billet, forges after the machining, need pass through the forging of several fire time again, and its forging is become the slab of rectangular parallelepiped, just can be used for board materials production.Electron-beam cold bed furnace has melted out the slab ingot of size, can directly be used for the production of sheet material.The titanium ingot chemical ingredients of making through electron-beam cold bed furnace is even, and foreign matter content is low, and surface quality is good.Titanium ingot specification is the slab ingot of 200 * 1290 * 5000mm, after 3 ~ 5mm milling machine strips off the skin, can directly be used for hot rolling slab, improves terrible material rate.Slab planeness and linearity all are superior to forging slab.
The electron-beam cold bed furnace of this patent is EBCHR 6/200/3600 a type electron-beam cold bed furnace, and EBCHR represents the electron beam cold hearth melting stove, and 6 represent 6 electron beam gun, and 200 represent 200000 liters/second the speed of evacuation, and 3600 represent 3600KW maximum electron rifle power.
The present invention breaks through i.e. " the VAR melting billet+cogging is forged " process method of traditional slab method of manufacture; The method of a kind of High-efficient Production titanium slab of introducing; Use the electron-beam cold bed furnace of 6 electron beam gun, bulk cargo feeder or bar feeder with raw material (Titanium Sponge 40-60 mesh, electrode block, block reclaimed materials or the bits shape reclaimed materials etc.) electron-beam cold bed furnace of packing into of selected components carry out melting; Then the ingot casting cooling that obtains is come out of the stove, can obtain finished product.The present invention directly uses the raw material of virgin state to carry out melting, has avoided reclaimed materials broken, Titanium Sponge 40-60 mesh batch mixing, electrode block compacting, the weldering system of electrode.The slab ingot that melts out through optimization design is two on 200 * 1290 * 5000mm ingot casting of a stove two ingots, about 12 tons of weight, and this slab ingot need not secondary smelting; Need not to forge, can directly be used for rollingly, shortened Production Flow Chart and production cycle; Reduce manufacturing cost, improved efficient greatly.Adopt the process method of " EB melting+High-efficient Production ", it is even to obtain chemical ingredients, and foreign matter content is low, and surface quality is good, and slab planeness and linearity all are superior to forging slab, and amount of machining is little, the slab that yield rate is high.
Through adopting technique scheme, the present invention has following beneficial effect:
The present invention directly uses the raw material of virgin states such as Titanium Sponge 40-60 mesh, block reclaimed materials and bits shape reclaimed materials to carry out melting, has avoided waste material broken, electrode block compacting, the weldering system of electrode.The use of Titanium Sponge 40-60 mesh: 30 barrels of single ingot melting meltings every day, every barrel 200 kg, but 6 tons of Titanium Sponge 40-60 meshs of melting; 60 barrels of two ingot melting meltings every day, every barrel 200 kg, but 12 tons of Titanium Sponge 40-60 meshs of melting; The use of reclaimed materials: the bar collection box only needs the pure titanium plate that 5 3-5mm is thick to being connected into the box of 450*450*1600mm, and spot welding get final product then, the weldering system simply, 1 box can be accomplished making in 2 hours.Weldering system is directly put into the bar case with reclaimed materials after accomplishing, each load-bearing 500 ~ 1200kg, but about 6.5 tons of 9 bar gross weights of single ingot melting single device every day melting, but about 13 tons of 18 bar gross weights of two ingot melting single device every day melting; And the slab ingot that melts out can directly be used for hot rolling slab after stripping off the skin through 3 ~ 5mm milling machine, has improved efficient greatly.
The VAR stove of prior art, reclaimed materials is broken, electrode block is suppressed, the weldering system of electrode needs the long period, and the labor manpower and materials, with the compacting electrode, can suppress 200 every day, and every 10-20kg can prepare raw material 2-4 ton; 1 electrode weight of every stove melting is 150Kg, and every days 5, stove melting production capacity can only reach 750kg, and the titanium ingot that melts out also need be through the forging of too much fire time, can carry out hot rolling after removing oxide debris, and is must the material rate also low.
Adopt the method for this patent High-efficient Production titanium slab, the slab yield rate improves about 10% than traditional vacuum consumable smelting+forging process; Efficient also improves several times.
TA1 slab chemical ingredients satisfies " the GBT3620.1-2007 titanium or titanium alloy trade mark and chemical ingredients ", and its Composition Control can reach the regulation of following table.The monolateral amount of stripping off the skin≤5mm, planeness≤3mm/5m.
Table 1
Hot-rolled sheet and the cold-reduced sheet produced with this slab all satisfy " GBT3621-2007 titanium or titanium alloy sheet material ", and its performance sees the following form.
Table 2 hot-rolled pure titanium plate stretching test result.
| The sampling direction | Ys/MPa | Tensile strength/MPa | Unit elongation |
| Index | 140～310 | ≥240 | ≥30 |
| The cross directional stretch sample | 270 | 345 | 40% |
| The longitudinal stretching sample | 250 | 350 | 39.5% |
The cold rolling pure titanium plate stretching test result of table 3.
| The sampling direction | Surrender | Tension | Unit elongation | Bending property |
| Index | 140～310 | ≥240 | ≥30 | ? |
| The cross directional stretch test | 300 | 365 | 47.5 | Qualified |
| The longitudinal stretching test | 250 | 370 | 50 | Qualified |
Embodiment
Embodiment 1: single ingot melting
Starting material: 1 grade of Titanium Sponge 40-60 mesh.
Equipment: EBCHR 6/200/3600 type electron-beam cold bed furnace.
The Titanium Sponge 40-60 mesh chemical ingredients requires to shown in the table 4.
Table 4
Actual melting technology:
A. 30 barrels of Titanium Sponge 40-60 meshs that meet the composition requirement are ready to, divide No. three times material loading, each material loading is put into electron-beam cold bed furnace rotary drum feeder with 10 barrels.
B. with working chamber, vibration charging chamber, the rotary drum feeder of electron-beam cold bed furnace with draw the ingot chamber to be evacuated to 4x 10-2Pa, open then and draw ingot chamber plate valve, will draw the ingot heelpiece to rise up in the water jacketed copper crucible.
C. vibration charging chamber plate valve is opened, driven the vibrating feeder feeding port into fusing cold bed top, then the rotary drum feeder plate valve is opened, make feed system be in ready state.
D. open 1#, 2#, 3#, 4#, 5#, 6# electron beam gun, select " positioning of beam " step, the readability and the angle of each electron beam gun working order and stroboscope are confirmed.
E. 1#, 2#, 3# and 4,5,6# electron beam gun GIP being transferred to " preheating " step carries out slow preheating to the titanium scull of fusing in cold bed, refining cold bed or the overflow cold bed and makes its slow expansion.
F. " vibrator " of vibrating feeder opened, then the rotary drum feeder motor is opened, it is errorless to confirm charging to begin a little charging, stops charging then.
G. treat on the scull to form the molten bath passage, begin 1#, 2#, 3#, 4#, 5#, 6# rifle GIP are transferred to " testing current step ", to electron beam gun the emission maximum electric current that can reach test.
H. 1#, 2#, 3# electron beam gun GIP are transferred to " continuing melting " step, utilize big electric current that raw material is melted.
I. open the rotary drum feeder motor and begin charging, and according to the start and stop of how much carrying out of inlet amount.Can not pile up too many waste material in order to avoid overflow in the fusing cold bed.
J. treat the titanium flow to the crucible place, 4#, 5#, 6# electron beam gun GIP are transferred to " filling crucible " step, the crucible heelpiece is filled expires earlier, 4#, 5#, 6# electron beam gun GIP is transferred to " continuing melting " step, begins automatically ingot pulling then.
K. in continuing fusion process, 5#, 6# rifle have edge graph shape clearly in " continuing melting " step, constantly crucible limit portion are scanned, and fall into the titanium condensation product that prevents the growth of limit portion to form condensation product in the crucible and be mingled with, thereby have influence on the internal soundness of slab ingot.
L. if continue in the fusion process; Owing to causing melting, the equipment reason interrupts; Then 1#, 2#, 3# electron beam gun GIP are transferred to " preheating " step, 4#, 5#, 6# electron beam gun GIP are transferred to " melting interrupts continuing heating steps ", the 5#6# rifle continues heating to the slab ingot top.
M. wait to draw the length that ingot length reaches to be needed, stop charging, and close 1#, 2#, 3#, 4# electron beam gun, stay 5#, 6# electron beam gun.
N. 4#, 5#, 6# electron beam gun GIP being transferred to " clear limit " step uses the dedicated scan figure that crucible runner and crucible limit portion are cleared up.
O. 4#, 5#, 6# electron beam gun GIP are transferred to " heat-sealing top " step the slab ingot top is sealed the top, make its slow cooling, prevent cooling fast and cause inner shrinkage cavity shrinkage porosity.
The heat-sealing top finishes, and all electron beam gun quit work, and vacuum system keeps operation, and slab ingot is drawing the indoor cooling of ingot more than 10 hours, and blow-on venting then goes out ingot.Going out the ingot specification is 200*1290*5000mm.
Slab ingot chemical composition analysis that melts out such as following table 5.
Table 5
| The position | Fe | C | N | H | O |
| On | 0.034 | 0.023 | 0.005 | 0.001 | 0.074 |
| In | 0.033 | 0.020 | 0.005 | 0.001 | 0.060 |
| Down | 0.025 | 0.022 | 0.005 | 0.001 | 0.069 |
| Average | 0.031 | 0.022 | 0.005 | 0.001 | 0.068 |
The flat bloom surface quality that melts out is good, and chemical ingredients is even, and it is good to mill behind the face 5mm surface, the inner no excessive defect of ultrasonic inspection.
Embodiment 2: two ingot meltings
Starting material: 0 grade of Titanium Sponge 40-60 mesh.
Equipment: EBCHR 6/200/3600 type electron-beam cold bed furnace.
The Titanium Sponge 40-60 mesh chemical ingredients requires like table 6.
Table 6
Actual melting technology:
A. 60 barrels of Titanium Sponge 40-60 meshs that meet the composition requirement are ready to, divide No. six times material loading, each material loading is put into electron-beam cold bed furnace rotary drum feeder with 10 barrels.
B. with working chamber, vibration charging chamber, the rotary drum feeder of electron-beam cold bed furnace with draw the ingot chamber to be evacuated to 4x 10-2Pa, open then and draw ingot chamber plate valve, will draw the ingot heelpiece to rise up in the water jacketed copper crucible.
C. vibration charging chamber plate valve is opened, driven the vibrating feeder feeding port into fusing cold bed top, then the rotary drum feeder plate valve is opened, make feed system be in ready state.
D. open 1#, 2#, 3#, 4#, 5#, 6# electron beam gun, selection " positioning of beam " step (, the readability and the angle of each electron beam gun working order and stroboscope are confirmed.
E. 1#, 2#, 3# and 4,5,6# electron beam gun GIP being transferred to " preheating " step carries out slow preheating to the titanium scull of fusing in cold bed, refining cold bed or the overflow cold bed and makes its slow expansion.
F. " vibrator " of vibrating feeder opened, then the rotary drum feeder motor is opened, it is errorless to confirm charging to begin a little charging, stops charging then.
G. treat on the scull to form the molten bath passage, begin 1#, 2#, 3#, 4#, 5#, 6# rifle GIP are transferred to " testing current step ", to electron beam gun the emission maximum electric current that can reach test.
H. 1#, 2#, 3# electron beam gun GIP are transferred to " continuing melting " step, utilize big electric current that raw material is melted.
I. open the rotary drum feeder motor and begin charging, and according to the start and stop of how much carrying out of inlet amount.Can not pile up too many waste material in order to avoid overflow in the fusing cold bed.
J. treat the titanium flow to the crucible place, 4#, 5#, 6# electron beam gun GIP are transferred to " filling crucible " step, the crucible heelpiece is filled expires earlier, 4#, 5#, 6# electron beam gun GIP is transferred to " continuing melting " step, begins automatically ingot pulling then.
K. in continuing fusion process, 5#, 6# rifle have edge graph shape clearly in " continuing melting " step, constantly crucible limit portion are scanned, and fall into the titanium condensation product that prevents the growth of limit portion to form condensation product in the crucible and be mingled with, thereby have influence on the internal soundness of slab ingot.
L. if continue in the fusion process; Owing to causing melting, the equipment reason interrupts; Then 1#, 2#, 3# electron beam gun GIP are transferred to " preheating " step, 4#, 5#, 6# electron beam gun GIP are transferred to " melting interrupts continuing heating steps ", the 5#6# rifle continues heating to the slab ingot top.
M. wait to draw the length that ingot length reaches to be needed, stop charging, and close 1#, 2#, 3#, 4# electron beam gun, stay 5#, 6# electron beam gun.
N. 4#, 5#, 6# electron beam gun GIP being transferred to " clear limit " step uses the dedicated scan figure that crucible runner and crucible limit portion are cleared up.
O. 4#, 5#, 6# electron beam gun GIP are transferred to " heat-sealing top " step the slab ingot top is sealed the top, make its slow cooling, prevent cooling fast and cause inner shrinkage cavity shrinkage porosity.
The heat-sealing top finishes, and all electron beam gun quit work, and vacuum system keeps operation, and slab ingot is drawing the indoor cooling of ingot more than 10 hours, and blow-on venting then goes out ingot.Going out the ingot specification is 200*1290*5000mm.
Slab ingot chemical composition analysis that melts out such as following table 7.
Table 7
| Specimen coding | Fe | C | N | H | O |
| On | 0.0190 | 0.0100 | 0.0050 | 0.0014 | 0.0380 |
| Down | 0.0200 | 0.0140 | 0.0050 | 0.0010 | 0.0420 |
| Average | 0.0180 | 0.0170 | 0.0053 | 0.0013 | 0.0500 |
The flat bloom surface quality that melts out is good, and chemical ingredients is even, and it is good to mill behind the face 5mm surface, the inner no excessive defect of ultrasonic inspection.
Embodiment 3: single ingot melting
Starting material: block TA1 reclaimed materials.
Equipment: EBCHR 6/200/3600 type electron-beam cold bed furnace.
The reclaimed materials chemical ingredients requires to shown in the table 8.
Table 8
Actual melting technology:
A. with after the TA1 reclaimed materials sandblast pickling, put into electron-beam cold bed furnace bar feeder in the titanium system bar box of the 450x450x1600mm that packs into.
B. with working chamber, the bar feed compartment of electron-beam cold bed furnace with draw the ingot chamber to be evacuated to 4x 10-2Pa, open then and draw ingot chamber plate valve, will draw the ingot heelpiece to rise up in the water jacketed copper crucible.
C. open 1#, 2#, 3#, 4#, 5# electron beam gun, select " positioning of beam " step, the readability and the angle of each electron beam gun working order and stroboscope are confirmed.
D. 1#, 2#, 3# and 4#, 5#, 6# electron beam gun GIP being transferred to " preheating " step carries out slow preheating to the titanium scull of fusing in cold bed, refining cold bed or the overflow cold bed and makes its slow expansion.
E. treat on the scull to form the molten bath passage, begin 1#, 2#, 3#, 4#, 5#, 6# rifle GIP are transferred to " testing current step ", to electron beam gun the emission maximum electric current that can reach test.
F. 1#, 2#, 3# electron beam gun GIP are transferred to " continuing melting " step, utilize big electric current that raw material is melted;
G. treat the titanium flow to the crucible place, 4#, 5#, 6# electron beam gun GIP are transferred to " filling crucible " step, the crucible heelpiece is filled expires earlier, 4#, 5#, 6# electron beam gun GIP is transferred to " continuing melting " step, begins automatically ingot pulling then.
H. in continuing fusion process, in the 5# rifle edge graph shape is clearly arranged in " continuing melting " step, constantly crucible limit portion is scanned, fall into the titanium condensation product that prevents the growth of limit portion and form condensation product in the crucible and be mingled with, thereby have influence on the internal soundness of slab ingot.
I. if continue in the fusion process, interrupt owing to the equipment reason causes melting, then 1#, 2#, 3# electron beam gun GIP are transferred to " preheating " step, 4#, 5#, 6# electron beam gun GIP are transferred to " melting interrupts continuing heating steps ", the 5# rifle continues heating to the slab ingot top.
J. wait to draw the length that ingot length reaches to be needed, stop charging, and close 1#, 2#, 3#, 4# electron beam gun, stay the 5# electron beam gun.
K. 4#, 5#, 6# electron beam gun GIP being transferred to " clear limit " step uses the dedicated scan figure that crucible runner and crucible limit portion are cleared up.
L. 4#, 5#, 6# electron beam gun GIP are transferred to " heat-sealing top " step the slab ingot top is sealed the top, make its slow cooling, prevent cooling fast and cause inner shrinkage cavity shrinkage porosity.
M. the heat-sealing top finishes, and all electron beam gun quit work, and vacuum system keeps operation, and slab ingot is drawing the indoor cooling of ingot more than 10 hours, and blow-on venting then goes out ingot, and going out the ingot specification is 200*1290*5600mm.
Slab ingot chemical composition analysis that melts out such as following table 9.
Table 9
| The position | Fe | C | N | H | O |
| On | 0.0140 | 0.0270 | 0.0066 | 0.0010 | 0.1030 |
| In | 0.0160 | 0.0360 | 0.0054 | 0.0010 | 0.1030 |
| Down | 0.0120 | 0.0270 | 0.0067 | 0.0010 | 0.0980 |
| Average | 0.0140 | 0.0300 | 0.0062 | 0.0010 | 0.1013 |
The flat bloom surface quality that melts out is good, and chemical ingredients is even, and it is good to mill behind the face 5mm surface, the inner no excessive defect of ultrasonic inspection.
Comparative Examples
Starting material: 1 grade of Titanium Sponge 40-60 mesh and TA1 reclaimed materials.
Equipment: VAC-150kg.
Chemical ingredients is defined as shown in the table 10.
Table 10
Actual melting technology:
A. with after the TA1 reclaimed materials sandblast pickling, carry out fragmentation.
B. reclaimed materials (8%) and the Titanium Sponge 40-60 mesh with fragmentation mixes, and is that unit carries out the electrode block compacting with 18kg, is of a size of Φ 180x200mm.
8 electrode blocks that C. will suppress carry out the argon arc welding welding, and the grid for welding head, are welded into 1.6 meters of length, the electrode of weight 144kg.
D. will weld good electrode and pack in the VAR stove, carry out 1 melting.And the cooling of coming out of the stove.
E. the titanium ingot to melting carries out second electrode head weldering system.
F. for preventing molten reclaimed materials being mingled with in the titanium ingot of bulk, reach the segregation of composition, the titanium ingot is carried out secondary smelting, and the cooling of coming out of the stove.
G. the refrigerative titanium ingot of coming out of the stove is carried out the rising head excision,, epidermis is carried out the machined into peeling because titanium ingot epidermis shrinkage cavity shrinkage porosity is intensive.
H. the titanium ingot after the peeling is forged, take off after the forging and descale.
Ingot casting chemical composition analysis that melts out such as following table 11.
Table 11
Claims (1)
1. the method for a High-efficient Production titanium slab comprises using to have the electron-beam cold bed furnace of 6 electron beam gun, and wherein 1#, 2# electron beam gun work area are the melting cold bed; 3#, 4# electron beam gun work area are the refining cold bed, and 5#, 6# electron beam gun work area are overflow cold bed and 1#, 2# mold, wherein the corresponding 1# mold of 5# rifle; The corresponding 2# mold of 6# rifle;, 1#, 2#, 3# rifle be by the GIP time variable control of 1# computer, and 4#, 5#, 6# rifle are by the GIP time variable control of 2# computer; The GIP program of two computers is set the electron beam gun step respectively, it is characterized in that:
(1), with raw material Titanium Sponge 40-60 mesh, electrode block, block reclaimed materials or bits shape reclaimed materials, directly pack in the rotary drum feeder of electron-beam cold bed furnace or put into the bar feeder of electron-beam cold bed furnace in the titanium system bar box of packing into through feeding system; Wherein reclaimed materials needs the sandblast pickling, could use then;
(2), with working chamber, the feed compartment of electron-beam cold bed furnace with draw the ingot chamber to be evacuated to (1～8) * 10
-2Pa; (3), then open and draw ingot chamber plate valve, will draw the ingot heelpiece to rise up in the water jacketed copper crucible;
(4), subsequently feed in raw material at every turn all need exit again, material loading is evacuated to (1～8) * 10
-2Pa;
(5), open 1#, 2#, 3#, 4#, 5#, 6# electron beam gun, select " positioning of beam " step, the readability and the angle of each electron beam gun working order and stroboscope are confirmed;
(6), 1#, 2#, 3#, 4#, 5#, 6# electron beam gun GIP are transferred to " preheating " step, the titanium scull in fusing cold bed, refining cold bed or the overflow cold bed is carried out slow preheating and make its slow expansion;
(7), treat on the scull to form the molten bath passage, begin 1#, 2#, 3#, 4#, 5#, 6# rifle GIP are transferred to " testing current step ", to electron beam gun the emission maximum electric current that can reach test; Through testing current, confirm the working order of electron beam gun under big electric current;
(8), 1#, 2#, 3# electron beam gun GIP are transferred to " continue melting " step, utilize big electric current that raw material is melted;
(9), treat the titanium flow to the crucible place, 4#, 5#, 6# electron beam gun GIP are transferred to " filling crucible " step, heighten the energy of 5#, 6# electron beam gun; Earlier the crucible heelpiece is filled full; 4#, 5#, 6# electron beam gun GIP are transferred to " continuing melting " step, improve the melting speed of 1#, 2#, 3# rifle, and the energy of 5#, 6# rifle is set; The superheating temperature that makes crucible titanium liquid begins automatically ingot pulling then at 200 ℃;
(10), in continuing fusion process, in the setting program of 5#, 6# rifle edge graph shape is clearly arranged also in " continuing melting " step, constantly crucible limit portion is scanned;
(11), if continue in the fusion process; Owing to causing melting, the equipment reason interrupts; Then 1#, 2#, 3# electron beam gun GIP are transferred to " preheating " step, 4#, 5#, 6# electron beam gun GIP are transferred to " melting interrupts continuing heating steps ", the 56# rifle continues heating to the slab ingot top; After the equipment of treating recovers, then continue melting, and the cutout seam crossing does not influence the quality of final titanium ingot;
(12), wait to draw the length that ingot length reaches to be needed, stop charging, and close 1#, 2#, 3#, 4# electron beam gun, stay 5#, 6# electron beam gun;
(13), 4#, 5#, 6# electron beam gun GIP being transferred to " clear limit " step uses clear scan edge figure that crucible runner and crucible limit portion are cleared up;
(14), 4#, 5#, 6# electron beam gun GIP are transferred to " heat-sealing top " step the slab ingot top are sealed the top, make its slow cooling, prevent cooling fast and cause inner shrinkage cavity shrinkage porosity;
(15), heat-sealing top finishes, all electron beam gun quit work, vacuum system keeps operation, slab ingot is drawing the indoor cooling of ingot more than 10 hours, blow-on venting then goes out ingot.
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| CN103667734A (en) * | 2013-11-25 | 2014-03-26 | 攀枝花云钛实业有限公司 | Method for smelting pure titanium to manufacture ingot heads by using electron beam cold bed smelting furnace |
| CN103866130A (en) * | 2014-03-19 | 2014-06-18 | 洛阳双瑞精铸钛业有限公司 | Method for melting titanium scraps and pure titanium wastes of thin titanium plates by electron beam cold hearth melting furnace |
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| CN103866130A (en) * | 2014-03-19 | 2014-06-18 | 洛阳双瑞精铸钛业有限公司 | Method for melting titanium scraps and pure titanium wastes of thin titanium plates by electron beam cold hearth melting furnace |
| CN104032151A (en) * | 2014-05-30 | 2014-09-10 | 云南钛业股份有限公司 | EB (electron beam) cold hearth furnace smelting method of TC4 titanium alloy ingot |
| CN107164642A (en) * | 2017-05-12 | 2017-09-15 | 西部钛业有限责任公司 | A kind of method that utilization titanium crumble prepares TA1 titanium ingots |
| CN108277370A (en) * | 2017-12-14 | 2018-07-13 | 洛阳双瑞精铸钛业有限公司 | A kind of TC4 titanium alloy large sizes slab and the preparation method and application thereof |
| CN108277370B (en) * | 2017-12-14 | 2019-10-25 | 洛阳双瑞精铸钛业有限公司 | A kind of TC4 titanium alloy large size slab and the preparation method and application thereof |
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| CN110918906A (en) * | 2019-10-23 | 2020-03-27 | 云南钛业股份有限公司 | A method for removing bubbles from electron beam cooling bed furnace casting titanium and titanium alloy hollow ingots |
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