CN103409637A - Full-automatic commercial pure titanium smelting method adopting electron beam cold hearth furnace - Google Patents
Full-automatic commercial pure titanium smelting method adopting electron beam cold hearth furnace Download PDFInfo
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Abstract
The invention relates to a full-automatic TA1 smelting method adopting an electron beam cold hearth furnace and belongs to the technical field of production engineering application. The production method comprises the following steps: drying and putting titanium sponge into an Archimedean screw tube which is mounted into a feeding system of an electron beam cold hearth melting furnace (EB furnace for short), wherein different rotary speeds are set; when the degree of vacuum of the feeding system reaches 0.4-0.8 Pa and the degree of vacuum of a main smelting cold hearth reaches 0.05-0.8 Pa, starting the feeding system to feed the titanium sponge into the smelting cold hearth of a main smelting chamber; triggering an electron gun to melt the titanium sponge into liquid titanium which flows through a primary refining cold hearth and a main refining cold hearth and then into a rectangular withdrawing crucible; controlling the rotary speed of the Archimedean screw tube to control the feeding speed and scanning patterns so as to control the melting speed, and the ingot pulling rate thereby realizing full-automatic control. The method has the advantages of good ingoting quality, high one-step yield, low manufacturing cost, controllable production period, simplicity in operation, energy conservation, environmental protection and high repeatability.
Description
Technical field
The present invention relates to a kind of electron-beam cold bed furnace full-automatic melting industrially pure titanium, the especially method of melting TA1, belong to titanium material production engineering applied technical field.
Background technology
Titanium and alloy thereof are to have the type material of special performance and important biomaterial.It has the unrivaled advantage of metal products in the past (as: high specific strength, low density, corrosion-resistant, shape memory, super bullet, high damping, low modulus, good biocompatibility etc.), thereby be the novel texture metallic substance that has application prospect most at present, the particularly application aspect aerospace and petroleum chemical industry field.Greatly develop titanium industry to consolidating national defense and the development of the national economy has earth shaking strategic importance, the countries in the world Economic development shows, advanced titanium industry is the important symbol of overall national strength.
The more ripe processing method of the Ti product of domestic industry production at present mainly contains two kinds: a kind of is the vacuum consumable electrode arc furnace smelting process, another is powder metallurgic method, and the common ground of these two kinds of methods is that required temperature is high, production time long (tens hours to tens hours), heat-up rate slow (several years to tens degree per minute).Research shows: adopt the vacuum consumable electrode arc furnace smelting process to produce in the process of Ti product and be easy to occur oxidation, the casting flaw such as easily occur component segregation in fusion process, tissue odds is even and be mingled with, the growth of hole, column crystal is irregular, and while adopting powder metallurgic method to produce Ti product, because the preparation process warming and cooling rate is slow, the sintering process temperature is high and soaking time is long, the goods of producing oxidation, coarse grains easily appear, relative density is lower, in material, has the deficiencies such as a large amount of holes.In order to improve the once lumber-preserving rate, reduce production costs, reduce or avoid the defect of bringing due to production technique, must reduce as far as possible temperature required in production process, shorten the production time, improve heat-up rate.
The cold hearth melting technology is a kind of advanced smelting technique of producing clean metal developed rapidly the eighties in 20th century.There are some researches show that cold hearth melting is mingled with ability considerably beyond 3 vacuum consumable smeltings at the minimizing high/low density, is more than powder metallurgy far away aspect output.For this reason, the cold hearth melting technology becomes irreplaceable a kind of technology in the production of large-scale high-accuracy forging, particularly in the production of the precise part such as aerospace engine titanium alloy rotation, the unrivaled advantage of traditional technology of preparing being arranged, is to produce at present a kind of effective ways of clean metallized metal material.But adopt the cold hearth melting technology in actual production titanium ingot, due to the speed of input speed, controlled melting and draw not mating of ingot speed easily to cause the titanium ingot cold shut, fold to occur, be mingled with, the casting flaw such as grain growing is irregular, in follow-up titanium products production, must increase the loaded down with trivial details operations such as cutting, classification, consolidation, greatly reduce production efficiency, and then increase production cost.Therefore, improve ingot quality to boosting productivity, reduce production costs significant.By the retrieval to the prior art document, about the research of the full-automatic melting TA1 of electron-beam cold bed furnace, not yet find relevant report.
Summary of the invention
The object of the present invention is to provide the industrially pure titanium method of the full-automatic melting of a kind of electron-beam cold bed furnace, utilize the method production can obtain the ingot casting that quality is higher, can be the production deduction and exemption operation of subsequent product, can significantly enhance productivity, reduce production costs.
The present invention is achieved by the following technical solutions: the method for the full-automatic melting industrially pure titanium of a kind of electron-beam cold bed furnace (TA1), and the present invention is characterised in that through following process steps:
(1), by granularity, be 0.83～25.4mm, purity is 99.7% titanium sponge vacuum drying;
(2), titanium sponge is placed in to vacuum tightness is 0.6 ± 0.1Pa, temperature is in 60 ± 0.2 ℃ of threading Archimedean screw cylinders after oven dry;
(3), the Archimedean screw cylinder that will install titanium sponge is placed in EB stove feed system, then setting its speed of rotation is Nr/min, set electron beam gun scanning shape and track, when feed system vacuum tightness is 0.4～0.8Pa, main melting body of heater vacuum tightness 0.05～0.8Pa, opening feed system adds material on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, main refining cold bed, flow to rectangle crystal pulling crucible, can obtain the TA1 ingot casting after drawing the ingot system ingot casting to be pulled to crystal pulling chamber argon filling furnace cooling;
When described in
Wherein
ν is for drawing ingot speed, Δ m=60kg, ρ=4507kg/m
3, the K value is 15.5～21.0.
Electron beam gun melting scanning is shaped as rectangle, length is 20～25mm, wide is 16～18mm, scanning period is 460～720ms, track while scan is circle, ellipse or rectangle, and the track while scan cycle is 6.4～25.6s, and the power of electron beam gun is 550 ± 150kw, bombarding voltage is 45 ± 10kv, and drawing ingot speed ν is 10.5～22.5mm/min.
When utilizing the present invention to apply in actual production, the track while scan position of electron beam can be adjusted according to the position of charging, and the setting of the watt level of electron beam gun does not stockpile material with first refining cold bed in fusion process and is as the criterion.The track while scan size can cover just refining cold bed conical sponge titanium surface-area with the electron beam melting figure
More than be as the criterion.
The invention has the advantages that:
(1), can greatly improve lumber recovery;
(2), can greatly boost productivity;
(3), produce the required cycle controlled;
(4), energy-conserving and environment-protective, repeatable strong;
(5), convenience, simple to operate is set.
Embodiment
The present invention realizes according to following detailed technology scheme:
The method of the full-automatic melting industrially pure titanium of a kind of electron-beam cold bed furnace (TA1), the present invention is characterised in that through following process steps:
(1), by granularity, be 0.83～25.4mm, purity is 99.7% titanium sponge vacuum drying;
(2), titanium sponge is placed in to vacuum tightness is 0.6 ± 0.1Pa, temperature is in 60 ± 0.2 ℃ of threading Archimedean screw cylinders after oven dry;
(3), the Archimedean screw cylinder that will install titanium sponge is placed in EB stove feed system, then setting its speed of rotation is Nr/min, set electron beam gun scanning shape and track, when feed system vacuum tightness is 0.4～0.8Pa, main melting body of heater vacuum tightness 0.05～0.8Pa, opening feed system adds material on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, main refining cold bed, flow to rectangle crystal pulling crucible, can obtain the TA1 ingot casting after drawing the ingot system ingot casting to be pulled to crystal pulling chamber argon filling furnace cooling;
When described in
Wherein
ν is for drawing ingot speed, Δ m=60kg, ρ=4507kg/m
3, the K value is 15.5～21.0.Electron beam gun melting scanning is shaped as rectangle, length is 20～25mm, wide is 16～18mm, scanning period is 460～720ms, track while scan is circle, ellipse or rectangle, and the track while scan cycle is 6.4～25.6s, and the power of electron beam gun is 550 ± 150kw, bombarding voltage is 45 ± 10kv, and drawing ingot speed ν is 10.5～22.5mm/min.
When utilizing the present invention to apply in actual production, the track while scan position of electron beam can be adjusted according to the position of charging, and the setting of the watt level of electron beam gun does not stockpile material with first refining cold bed in fusion process and is as the criterion.The track while scan size can cover just refining cold bed conical sponge titanium surface-area with the electron beam melting figure
More than be as the criterion.
Be embodied as:
(1), by purity, be 99.7%, granularity is that the titanium sponge of 0.83～25.4mm is 60 ℃ in temperature, vacuum tightness is to dry under the 0.6Pa condition, after drying in device Archimedean screw cylinder, then the Archimedean screw wound packages is placed in EB stove feed system.
(2) by the Archimedean screw cylinder in (1), the setting speed of rotation is 0.2～0.3r/min, in vacuum tightness, be 0.4～0.8Pa, during main melting body of heater vacuum tightness 0.05～0.8Pa, the material that the unlatching feed system rotates the Archimedean screw cylinder is added on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, after main refining cold bed, flow to rectangle crystal pulling crucible, by drawing the ingot system that ingot casting is pulled out to the crystal pulling crucible, after furnace cooling, can obtain flat TA1 ingot casting.
Below in conjunction with embodiment, technical scheme of the present invention is further described:
Embodiment 1
By purity, be 99.7%, granularity is that the titanium sponge of 0.83～25.4mm is 60 ℃ in temperature, and vacuum tightness is to dry under the 0.6Pa condition, after drying, installs in the Archimedean screw cylinder, then the Archimedean screw wound packages is placed in EB stove feed system.Setting its speed of rotation is Nr/min, is 0.4～0.8Pa in vacuum tightness; During main melting body of heater vacuum tightness 0.05～0.8Pa, the material that the unlatching feed system rotates the Archimedean screw cylinder is added on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, after main refining cold bed, flow to rectangle (1380*200mm) crystal pulling crucible, by drawing the ingot system, ingot casting is pulled out to the crystal pulling crucible, after furnace cooling, can obtain flat titanium base ingot casting.Concrete implementing process is as shown in table 1 below:
Table 1
Embodiment 2
By purity, be 99.7%, granularity is that the titanium sponge of 0.83～25.4mm is 60 ℃ in temperature, and vacuum tightness is to dry under the 0.6Pa condition, after drying, installs in the Archimedean screw cylinder, then the Archimedean screw wound packages is placed in EB stove feed system.Setting its speed of rotation is Nr/min, is 0.4～0.8Pa in vacuum tightness; During main melting body of heater vacuum tightness 0.05～0.8Pa, the material that the unlatching feed system rotates the Archimedean screw cylinder is added on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, after main refining cold bed, flow to rectangle (1250*200mm) crystal pulling crucible, by drawing the ingot system, ingot casting is pulled out to the crystal pulling crucible, after furnace cooling, can obtain flat titanium base ingot casting.Concrete implementing process is as shown in table 2 below:
Table 2
Embodiment 3
By purity, be 99.7%, granularity is that the titanium sponge of 0.83～25.4mm is 60 ℃ in temperature, and vacuum tightness is to dry under the 0.6Pa condition, after drying, installs in the Archimedean screw cylinder, then the Archimedean screw wound packages is placed in EB stove feed system.Setting its speed of rotation is Nr/min, is 0.4～0.8Pa in vacuum tightness; During main melting body of heater vacuum tightness 0.05～0.8Pa, the material that the unlatching feed system rotates the Archimedean screw cylinder is added on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, after main refining cold bed, flow to rectangle (1050*200mm) crystal pulling crucible, by drawing the ingot system, ingot casting is pulled out to the crystal pulling crucible, after furnace cooling, can obtain flat titanium base ingot casting.Concrete implementing process is as shown in table 3 below:
Table 3
Claims (4)
1. the method for the full-automatic melting industrially pure titanium of electron-beam cold bed furnace is characterized in that: described method contains and has the following steps:
(1), 0 grade of titanium sponge is dried under vacuum condition;
(2), the titanium sponge after drying is put in the Archimedean screw cylinder;
(3), the Archimedean screw cylinder that installs titanium sponge is placed in to EB stove feed system, then setting its speed of rotation is Nr/min, set electron beam gun melting scanning shape and track, when feed system vacuum tightness is 0.4～0.8Pa, main melting body of heater vacuum tightness 0.05～0.8Pa, opening feed system adds material on main working chamber's melting cold bed, the unlocking electronic rifle is melted into titanium liquid by titanium sponge, the titanium liquid just refining cold bed of flowing through, after main refining cold bed, flow to the crystal pulling crucible, after drawing the ingot system ingot casting to be pulled to crystal pulling chamber argon filling furnace cooling, it is flat industrially pure titanium ingot casting, wherein:
Wherein
ν is for drawing ingot speed, Δ m=60kg, ρ=4507kg/m
3, the K value is 15.5～21.0.
2. by the method for the full-automatic melting industrially pure titanium of a kind of electron-beam cold bed furnace claimed in claim 1, it is characterized in that: in step (1), the granularity of titanium sponge is 0.83～25.4mm, and purity is 99.7%.
3. by the method for the full-automatic melting industrially pure titanium of a kind of electron-beam cold bed furnace claimed in claim 1, it is characterized in that: the condition that in step (2), titanium sponge is dried is: vacuum tightness is 0.6 ± 0.1Pa, and temperature is 60 ± 0.2 ℃.
4. press the method for the full-automatic melting industrially pure titanium of a kind of electron-beam cold bed furnace claimed in claim 1, it is characterized in that: step (3) electron gun melting scanning is shaped as rectangle, length is 20～25mm, wide is 16～18mm, and the scanning period is 460～720ms, and track while scan is circle, ellipse or rectangle, the track while scan cycle is 6.4～25.6s, the power of electron beam gun is 550 ± 150kw, and bombarding voltage is 45 ± 10kv, and drawing ingot speed ν is 10.5～22.5mm/min.
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Cited By (18)
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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 |
| CN103966458A (en) * | 2013-02-04 | 2014-08-06 | 青海聚能钛业有限公司 | Single-electron gun cold hearth melting furnace |
| CN104195354A (en) * | 2014-08-28 | 2014-12-10 | 云南钛业股份有限公司 | Method for preparing industrially pure titanium from reclaimed materials by electron beam cooling bed furnace smelting |
| CN104212982A (en) * | 2014-08-28 | 2014-12-17 | 云南钛业股份有限公司 | Method for improving surface quality of huge flat titanium blank ingot produced by EB furnace |
| CN104212989A (en) * | 2014-08-28 | 2014-12-17 | 云南钛业股份有限公司 | Method for smelting and producing TA10 hot continuous rolling square billet by adopting electron beam cooling bed furnace |
| CN105154834A (en) * | 2015-09-07 | 2015-12-16 | 云南钛业股份有限公司 | Production method of cylindrical titanium sputtering target material |
| CN105170686A (en) * | 2015-07-21 | 2015-12-23 | 洛阳双瑞精铸钛业有限公司 | Processing method for high-purity titanium sheet for coating titanium anode base material |
| CN106282593A (en) * | 2016-09-21 | 2017-01-04 | 青海聚能钛业有限公司 | The technique that a kind of electron-beam cold bed furnace reclaims remelting TC4 waste material |
| CN107502784A (en) * | 2017-10-18 | 2017-12-22 | 云南钛业股份有限公司 | The method of the rifle cold cathode EB stove Joint Production TC4 titanium alloys billet of VAR stoves+7/slab ingot |
| CN107739844A (en) * | 2017-10-18 | 2018-02-27 | 云南钛业股份有限公司 | The setting method of the rifle electron beam scanning style of ingot casting end face 2 of hollow ingot |
| CN107746971A (en) * | 2017-10-18 | 2018-03-02 | 云南钛业股份有限公司 | It is a kind of with electron-beam cold bed furnace cast titanium or the method for titanium alloy hollow ingot |
| CN110578061A (en) * | 2018-06-07 | 2019-12-17 | 湖南稀土金属材料研究院 | Electron beam melting continuous ingot casting method for high-purity rare earth metal |
| CN111945022A (en) * | 2020-08-10 | 2020-11-17 | 昆明理工大学 | Method for reducing ingot pulling time of smelting titanium and titanium alloy slab ingot in EB (Electron Beam) furnace |
| CN112011694A (en) * | 2020-08-10 | 2020-12-01 | 昆明理工大学 | Ingot pulling method for smelting TA10 titanium alloy slab ingot in EB (Electron Beam) furnace |
| CN112496278A (en) * | 2020-10-28 | 2021-03-16 | 攀枝花云钛实业有限公司 | Method for smelting round ingot by electron beam cold bed |
| CN112501457A (en) * | 2020-10-28 | 2021-03-16 | 攀枝花云钛实业有限公司 | Method for smelting titanium or titanium alloy square billet by electron beam cold bed |
| CN112626351A (en) * | 2020-12-18 | 2021-04-09 | 云南昆钢电子信息科技有限公司 | Electron beam constant melting speed smelting control system |
| CN115627369A (en) * | 2022-10-27 | 2023-01-20 | 昆明理工大学 | Method for producing pure titanium TA1 by smelting titanium sponge block slices in EB (Electron Beam) furnace |
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| CN103966458A (en) * | 2013-02-04 | 2014-08-06 | 青海聚能钛业有限公司 | Single-electron gun cold hearth melting furnace |
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| CN104212982A (en) * | 2014-08-28 | 2014-12-17 | 云南钛业股份有限公司 | Method for improving surface quality of huge flat titanium blank ingot produced by EB furnace |
| CN104212989A (en) * | 2014-08-28 | 2014-12-17 | 云南钛业股份有限公司 | Method for smelting and producing TA10 hot continuous rolling square billet by adopting electron beam cooling bed furnace |
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| CN107502784B (en) * | 2017-10-18 | 2019-05-21 | 云南钛业股份有限公司 | A method of producing TC4 titanium alloy billet/slab ingot |
| CN110578061A (en) * | 2018-06-07 | 2019-12-17 | 湖南稀土金属材料研究院 | Electron beam melting continuous ingot casting method for high-purity rare earth metal |
| CN111945022A (en) * | 2020-08-10 | 2020-11-17 | 昆明理工大学 | Method for reducing ingot pulling time of smelting titanium and titanium alloy slab ingot in EB (Electron Beam) furnace |
| CN112011694A (en) * | 2020-08-10 | 2020-12-01 | 昆明理工大学 | Ingot pulling method for smelting TA10 titanium alloy slab ingot in EB (Electron Beam) furnace |
| CN112496278A (en) * | 2020-10-28 | 2021-03-16 | 攀枝花云钛实业有限公司 | Method for smelting round ingot by electron beam cold bed |
| CN112501457A (en) * | 2020-10-28 | 2021-03-16 | 攀枝花云钛实业有限公司 | Method for smelting titanium or titanium alloy square billet by electron beam cold bed |
| CN112626351A (en) * | 2020-12-18 | 2021-04-09 | 云南昆钢电子信息科技有限公司 | Electron beam constant melting speed smelting control system |
| CN115627369A (en) * | 2022-10-27 | 2023-01-20 | 昆明理工大学 | Method for producing pure titanium TA1 by smelting titanium sponge block slices in EB (Electron Beam) furnace |
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