CN102586553B - High precision titanium alloy resistance heating furnace - Google Patents
High precision titanium alloy resistance heating furnace Download PDFInfo
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- CN102586553B CN102586553B CN201210068526.4A CN201210068526A CN102586553B CN 102586553 B CN102586553 B CN 102586553B CN 201210068526 A CN201210068526 A CN 201210068526A CN 102586553 B CN102586553 B CN 102586553B
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Abstract
The invention discloses a high precision titanium alloy resistance heating furnace. The high precision titanium alloy resistance heating furnace comprises a furnace body and a heating controller and is characterized in that the furnace body consists of six side plates; the cavity in the middle of the furnace body forms a hearth; a movable furnace door is arranged on at least one side plate; electric heaters are arranged on the inner sides of the six side plates of the furnace body and used for heating the hearth; a plurality of circulating fans are arranged at the top of the hearth; a furnace shell is arranged on the outer sides of the six side plates; the furnace shell is welded by profile steel and plates; and the furnace body can meet the requirements on heating and heat treatment at different temperature sections of 350 to 1,150 DEG C. The high precision titanium alloy resistance heating furnace has high heating speed in the heating process and high furnace temperature uniformity, furnace temperature stability and the like, meets the requirement of the heat treatment process and meets the heating or heat treatment requirement of the titanium alloy from low temperature to medium temperature and high temperature. One furnace can meet the requirements on heat treatment at different temperature sections of 350 to 1,150 DEG C.
Description
Technical field
The present invention relates to the high-temperature heat treatment stove that a kind of alloy workpiece is heat-treated, the high precision titanium alloy resistance heating furnace of especially titanium alloy being heat-treated.
Background technology
Titanium alloy is a kind of important structural metallic materials, and with other metallographic phase ratio, it has the non magnetic and less feature of linear expansivity.There is very high yield strength/density ratio, fatigue strength/density ratio, creeping limit, good high temperature performance,, thermostability, corrosion stability; Under normal temperature and overtemperature; Specific tenacity is high, has enough toughness and plasticity; It is the main separation material of Aeronautics and Astronautics primary structure member.Titanium alloy is on various type aircrafts, and consumption grows with each passing day, and develops the high precision cycle resistance furnace that is applicable to titanium alloy heating, is called an important process of heat treatment furnace manufacturer.
Different by micro-metallographic structure, titanium alloy is divided into alpha titanium alloy (as TA4, TA5, TA6, TA7 etc.), type alpha+beta: all kinds of titanium alloy trades mark that (TC3, TC4, TC5, TC6, TC8, TC9, TC10, TC11, BT6, BT9, BT16 etc.) beta titanium alloy (as TB1, TB2, TB5 etc.) is applicable to Aeronautics and Astronautics, boats and ships, weapon industry use have 45 more than.(comprising the trade mark that has 4 titanium alloy welding wires)
The titanium alloy of the different trades mark, has separately different process heat resolving systems.It has been contained from 350～1150 ℃ of each different temperature sections.And titanium alloy is very responsive to temperature.Therefore require very strict to temperature system.According to relevant technological experimental data, under differing temps section and different heating soaking time condition, to same microstructure, the titanium alloy material of the same trade mark, its metallographic structure all can have very big-difference, and causes its mechanical mechanics property to have larger variation.Titanium alloy heating installation, by navigation mark HB5354-94 standard, applicable process furnace classification is 1～3 class stove.
In prior art, because the thermal characteristics of heating installation own is too poor, and cause titanium alloy product condemnation factor high, even whole stove is scrapped, and causes the thing of heavy economic losses to occur repeatedly; And its heat-up rate is slow, temperature uniformity, furnace temperature stability are poor.
And the producer of aircraft industry, because of its production feature: small batch, many kinds, many specifications etc., all wish can complete conventional Forge Heating, the high temperature forging heating of various titanium alloys on a process furnace, and the annealing of different trade mark titanium alloys, solid solution and timeliness thermal treatment.But, heat treatment furnace of the prior art, can not meet simultaneously titanium alloy from low temperature to temperature again to heating or the thermal treatment needs of high temperature, arrange a plurality of stoves meet titanium alloy from low temperature to temperature again to heating or the thermal treatment needs of high temperature, increased facility investment, wasted heating energy source.
Summary of the invention
The present invention is directed to the annealing furnace of prior art, the thermal characteristics that exists when processing the extraordinary workpiece such as titanium alloy is poor, condemnation factor is high, can not adapt to titanium alloy from low temperature to temperature again to deficiencies such as the heating of high temperature or thermal treatment needs, provide a kind of heat-up rate fast, reduce titanium alloy product condemnation factor, adaptation titanium alloy from low temperature to temperature again to the heating of high temperature or the high precision titanium alloy resistance heating furnace of thermal treatment needs.
Technical scheme of the present invention: high precision titanium alloy resistance heating furnace, for conventional Forge Heating, the high temperature forging heating of titanium alloy, and the annealing of different trade mark titanium alloys, solid solution and timeliness thermal treatment, comprise body of heater and heating controller; It is characterized in that: by above, below, the left side, the right side, above, six bodies of heater that side panel forms below, middle cavity forms burner hearth, is provided with packaged type fire door therein at least one side panel; Inner side at six side panels of body of heater, is all provided with electric heater, and under described heating controller is controlled, heating is with heating furnace;
At the top of burner hearth, be provided with several recirculation blowers, under slave mode, in burner hearth, dry;
The outside of six side panels is furnace shells, and furnace shell adopts shaped steel and sheet material to be welded; It in furnace shell, is heat-resisting furnace lining; With the anchoring piece of high temperature steel material, heat-resisting furnace lining is all connected and be positioned on furnace shell; The front end of anchoring piece, all hidden in heat-resisting furnace lining, anchoring piece is in hot lower free expansion, do not limit or compresses heat-resisting furnace lining; Described body of heater can meet from 350～1150 ℃ of each different temperature section heating, heat treated needs simultaneously.
Further feature is: the heating original paper of described electric heater is that resistive band turns to ripple struction.
High precision titanium alloy resistance heating furnace of the present invention, with respect to prior art, has following features:
1, in heat-processed heat-up rate fast, reach higher temperature uniformity, furnace temperature stability etc., meet the needs of thermal treatment process;
2, adapt to titanium alloy from low temperature to temperature again to heating or the thermal treatment needs of high temperature, a stove just can meet from 350～1150 ℃ of heat treated needs of each different temperature section simultaneously; In 350～1150 ℃ of each differing temps sections, according to AMS2750D high temperature measurement standard, strictly test, temperature uniformity, all can reach the standard of two class stoves (± 5 ℃) or three class stoves (± 8 ℃).
3, significantly reduce titanium alloy product condemnation factor, especially can prevent that the whole stove of titanium alloy from scrapping.
4, furnace lining and heating unit, work-ing life is longer, works, in two years without overhaul under continuous regime.
Accompanying drawing explanation
Fig. 1 is heating furnace structure front view of the present invention (analysing and observe);
Fig. 2 is the vertical view (analysing and observe) of Fig. 1;
Fig. 3 is the another kind of embodiment heating furnace structure front view (analysing and observe) of the present invention;
Fig. 4 is Fig. 3 vertical view (analysing and observe).
Embodiment
As Fig. 1, in 2, high precision titanium alloy resistance heating furnace of the present invention, conventional Forge Heating for titanium alloy, high temperature forging heating, and the annealing of different trade mark titanium alloys, solid solution and timeliness thermal treatment, comprise body of heater 1 and heating controller, by above, below, the left side, the right side, before, the body of heater 1 that six side panels next form, middle cavity forms burner hearth 2, on at least one side panel, be provided with packaged type fire door 3 therein, fire door 3 rotates or moves up and down under power set drives, to coordinate and to seal with the fire door door opening of offering on this side panel on body of heater 1.
Inner side at six side panels of body of heater 1, is all provided with electric heater 4, and after energising, heating is with heating furnace 2, and heating controller is controlled energising or the power-off of electric heater 4, adopts existing Power Regulation temperature controlling system to meet rate of heating and uniformity requirement.
The outside of six side panels is steel furnace shells 11, and furnace shell adopts shaped steel and the sheet material of the specification that meets the requirements to be welded.In manufacturing process, after the furnace shell employing intensive treatment as outside plate, embed the production method of welding, furnace shell outside, can't see weld seam.Furnace shell 11 not only has enough heat resistances and stiffness.In furnace shell 11, be heat-resisting furnace lining 12, adopted the furnace lining structure of flat-top, composite shape matl.Above side plate (furnace roof), the left side, the right side, above, the heat-resisting furnace lining 12 aluminum silicate fibre product material of side plate (four side walls) below.Insulating brick, i.e. high-strength light-weight brick and high-alumina refractory brick for side plate (furnace bottom) below.Movably the stove gate frame of fire door 3 damages because being subject to collision, adopts the low cement And High-strength Castable Refractories of steel fiber, step pouring moulding.
Furnace roof is selected the prefabricated profiled cellucotton brick of 1400 ℃ of classification temperature, the moist needle punched blanket of 1260 ℃ of classification temperature for backing, and the anchoring piece 13 that cotton brick is reinstated heat-resisting steels matter together with lining blanket one is fixing, reinforces on the steel construction piece on furnace shell top.
The heat-resisting furnace lining (being thermal insulation layer) of four side panels of burner hearth (four side walls) and fire door, uses magnesiumcarbonate insulation quilt, moist needling fiber blanket fissure of displacement lay-up.Flame retardant coating pressure forming, high-density (350 ㎏/m3) the polycrystalline ceramic fiber plate after spy processes.The special-purpose high temperature binding agent of import for seam between plate, splicing after brushing, heating cure and being integral.
On reasonable and appropriate position, with the anchoring piece 13 of many high temperature steel materials, heat-resisting furnace lining is all connected and be positioned on the furnace shell 11 of steel construction.The front end of all anchoring pieces 13 all hiddenly can not produce high temperature oxidation in heat-resisting furnace lining 12, adapts to the high temperature of 1100 ℃, can effectively extend its work-ing life.Anchoring piece 13, in hot lower free expansion, does not limit or compresses furnace lining, and furnace lining is not damaged.
At the top of burner hearth 2, above side plate (furnace roof) is upper, is provided with several recirculation blowers 5, under slave mode to the interior blowing of burner hearth 2 to stir the air in burner hearth 2, play stirring action to increase temperature uniformity; After recirculation blower 5 starts, force furnace atmosphere circulation, the convection current conduction of strengthening low-temperature heat section, improves the heat conducting uniformity coefficient of high temperature section.In order to facilitate M R, in structure design, recirculation blower 5 is set to an one-piece construction together with parts such as impellers, can from furnace roof, integral body pack into and take out.Through many experiments, prove: the box resistance heading furnace of high-temperature titanium alloy, increasing blower fan pump circulation is to guarantee one of technical measures that body of heater thermal property is good.
Recirculation blower 5 adopts the water-cooled of prior art, and it runs up below at 800 ℃, and 800 ℃ transfer low cruise above automatically to, weakens the fatigue stress of metallic impeller, strengthening low temperature convection circulation effect.
The heating original paper of electric heater 4 has resistance wire and two kinds of shaping prods of resistive band, from component life, power, distributes and fixed form is installed and comprehensively weighs, and it is better that the present invention adopts resistive band to turn to ripple struction.
Although resistance wire and resistive band are under the condition of high temperature, with same wavelength, pitch compares, and resistance wire distortion is less, and elongation and distortion are negligible.And resistive band distortion is larger, but resistive band has significant advantage on raising element work-ing life and raising radiation efficiency.
In resistive band fixed form, three kinds of traditional ways below custom employing on fibre furnace lining: (1) is pre-buried porcelain tube hook in layer of fibers; (2) spiral type pottery nail hook (3) increases a high temperature steel erecting frame, hook sleeve porcelain insulator on frame on furnace lining upper layer.
But be proven: aforesaid way is for the titanium alloy of large span temperature use range, not applicable.Because it is coarse and crude that furnace lining technique is made, Ceramic fitting quality is too poor, is easy to brokenly crisp under rapid heat cycle state.Under hot, there is serious contraction in layer of fibers, through metal oxidization burning loss, and distortion, well heater distortion, all may cause the short circuit of part or large area region, goes wrong frequently, and equipment may normally move hardly.The present invention, on titanium alloy resistance furnace, is to select the heat-resistant alloy wire of high nickel content to make the hook of resistive band.In the high-density polycrystalline ceramic fiber plate of pressure forming, be embedded into hook, adopted the hook technique for fixing of anti-rotation.Effectively controlled hot under, the trend of resistive band torsional deformation.Titanium alloy resistance heading furnace of the present invention, adapt to titanium alloy from low temperature to temperature again to heats forged or thermal treatment needs of high temperature, stove just can meet simultaneously from 350～1150 ℃ of each different temperature sections heat, heat treated needs.
According to actual needs, process furnace of the present invention, can be set to movable furnace bottom, joins furnace bottom from walking haulage gear (as shown in Figure 1, 2).According to different user technique needs, can be equipped with supplementary unit as quenching tank and the blower cooling water recycle system etc.; And, can pick and place titanium alloy workpiece by proportioning mechanical manipulator, at pallet of the interior proportioning of burner hearth 2, titanium alloy workpiece is placed on pallet, with mechanical manipulator, lifts pallet, and pallet is shifted out to burner hearth 2(as shown in Figure 3,4 together with titanium alloy workpiece integral body).
Claims (2)
1. a high precision titanium alloy resistance heating furnace, for conventional Forge Heating, the high temperature forging heating of titanium alloy, and the annealing of different trade mark titanium alloys, solid solution and timeliness thermal treatment, comprise body of heater (1) and heating controller; It is characterized in that: by above, below, the left side, the right side, above, six bodies of heater (1) that side panel forms below, middle cavity forms burner hearth (2), is provided with therein packaged type fire door (3) at least one side panel; Inner side at six side panels of body of heater (1), is all provided with electric heater (4), and under described heating controller is controlled, heating is with heating furnace (2); Above described burner hearth (2), the heat-resisting furnace lining (12) of the left side, the right side, front and back adopts aluminum silicate fiber material to make, described burner hearth (2) heat-resisting furnace lining (12) is below insulating brick;
Top in burner hearth (2), is provided with several recirculation blowers (5), under slave mode, in burner hearth (2), dries; Described recirculation blower (5) is set to an one-piece construction together with impeller, and from furnace roof, integral body packs into and takes out;
The outside of six side panels is steel furnace shell (11), is heat-resisting furnace lining (12) in furnace shell (11); With the anchoring piece (13) of high temperature steel material, heat-resisting furnace lining is all connected and be positioned on furnace shell (11); The front end of anchoring piece (13), all hidden in heat-resisting furnace lining (12), anchoring piece (13) is in hot lower free expansion, do not limit or compresses heat-resisting furnace lining (12);
Described body of heater (1) can meet from 350～1150 ℃ of each different temperature section heating, heat treated needs simultaneously.
2. high precision titanium alloy resistance heating furnace according to claim 1, is characterized in that: the heating original paper of described electric heater (4) is that resistive band turns to ripple struction.
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| CN201210068526.4A CN102586553B (en) | 2012-03-15 | 2012-03-15 | High precision titanium alloy resistance heating furnace |
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| CN201210068526.4A CN102586553B (en) | 2012-03-15 | 2012-03-15 | High precision titanium alloy resistance heating furnace |
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| CN103243205B (en) * | 2013-04-28 | 2014-11-26 | 中冶南方(武汉)威仕工业炉有限公司 | Hanging installation device for wavy resistance tape |
| CN103525983B (en) * | 2013-09-29 | 2016-08-17 | 长城汽车股份有限公司 | Heating furnace |
| CN106052382B (en) * | 2016-06-20 | 2018-08-21 | 北京机电研究所有限公司 | Aluminum alloy control arm high-precision heating furnace |
| CN107723437B (en) * | 2017-09-27 | 2024-01-23 | 河南中原特钢装备制造有限公司 | Special furnace for bar destressing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201325984Y (en) * | 2008-12-30 | 2009-10-14 | 重庆飞达电炉有限公司 | Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece |
| CN102219364A (en) * | 2011-06-21 | 2011-10-19 | 重庆飞达电炉有限公司 | Bottom lifting type resistance heating annealing furnace |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201325984Y (en) * | 2008-12-30 | 2009-10-14 | 重庆飞达电炉有限公司 | Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece |
| CN102219364A (en) * | 2011-06-21 | 2011-10-19 | 重庆飞达电炉有限公司 | Bottom lifting type resistance heating annealing furnace |
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