CN104534878A - Tungsten/molybdenum crucible for high-temperature heating furnace and manufacturing method of tungsten/molybdenum crucible - Google Patents
Tungsten/molybdenum crucible for high-temperature heating furnace and manufacturing method of tungsten/molybdenum crucible Download PDFInfo
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- CN104534878A CN104534878A CN201410791518.1A CN201410791518A CN104534878A CN 104534878 A CN104534878 A CN 104534878A CN 201410791518 A CN201410791518 A CN 201410791518A CN 104534878 A CN104534878 A CN 104534878A
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Abstract
The invention relates to a tungsten/molybdenum rounded rectangle crucible for a high-temperature heating furnace and a manufacturing method of the tungsten/molybdenum rounded rectangle crucible. The crucible is a rounded rectangle crucible without a bottom or a cover and is formed by defining two opposite frame type circular bead end plates and at least two side plates, vertical joints between connecting plates are in riveting connection, and each vertical joint is provided with at least four riveting points which are evenly distributed. The tungsten/molybdenum crucible is good in structural stability and meets the requirement for high-temperature heating of the high-temperature heating furnace. The invention further discloses the manufacturing method of the tungsten/molybdenum crucible for the high-temperature heating furnace, materials are saved, and cost is low.
Description
Technical field
The present invention relates to a kind of high-temperature heater tungsten/molybdenum crucible and preparation method thereof, particularly square crucible of a kind of high-temperature heater Large Copacity tungsten/molybdenum-base alloy and preparation method thereof.
Background technology
Crucible, as the built-in receptacle of thermal field in high-temperature heater, need bear high temperature, and the fusing point of tungsten/Mo is very high, and elevated temperature strength is large, is the ideal material making high-temperature heater crucible/cylinder.Therefore, tungsten/molybdenum crucible there has been at intermediate frequency furnace and smelting industry and applies widely.The square crucible such as adopted in intermediate-frequency heating furnace, it produces eddy current and generates heat under the effect of Medium frequency induction coil current, thus in burner hearth, plays heating, is incubated and the effect of samming.The preparation method of crucible mainly contains following several: (1) powder metallurgic method, (2) spraying process; (3) by tungsten, molybdenum-base alloy alloy sintering bar simmer method; (4) spinning process.In above-mentioned prior art, be subject to the restriction of manufacturing equipment by its product specification of crucible that powder metallurgic method, spraying process, spinning process are produced, the circular crucible of diameter at 800 below mm can only be produced; Although and the problem adopting tungsten bar simmer method can solve crucible size and shape to limit by equipment, but because the bar of tungsten/molybdenum bar is insecure with connecting between bar, the structural stability of crucible is poor, in high-temperature heater in heating and cooling process, crucible shrinks because tungsten bar produces and amount of contraction between upper-lower section is inconsistent and be out of shape, even occur that crucible avalanche damages, be difficult to service life reach requirement.Therefore this method cannot be adapted to the crucible making that dimensional requirement is very high, service condition is harsh.Adopt the method for tungsten/molybdenum board material spicing forming type can break through said method restriction and expand crucible bore, but adopt this method production opening diameter to be greater than the crucible of 800mm, be subject to again the restriction of tungsten/molybdenum thickness, because the hot-short transition temperature of tungsten/Mo is high, slab poor processability, usually can only simply process, the barrel-shaped of layer structure is surrounded as at room temperature adopted thin plate (below 1mm), therefore, the tungsten that splicing method of the prior art obtains, molybdenum-base alloy crucible, its planform is generally simple circular or square, the diameter of conventional circular crucible is generally less than 800mm, the opening major dimension of square crucible is generally less than 800mm.As Chinese patent application CN201310549407 discloses a kind of sapphire sintering riveted joint molybdenum crucible and preparation method thereof, although it have employed riveted joint joining method, it still only discloses the circular crucible preparation method that maximum gauge is 350 mm.On the other hand, along with crucible apply in high-temperature heater increasingly extensive, heavy caliber crucible make require higher, because tungsten/Mo is expensive, materials should be economized as far as possible, to reduce cost of manufacture.And (1) of the prior art powder metallurgic method, (2) spraying process; (3) by tungsten, molybdenum-base alloy sintered bar simmer method; (4) spinning process all has higher requirement to making apparatus, and equipment cost is high.
In sum, tungsten/molybdenum crucible preparation method that opening major dimension is greater than 800mm still awaits exploring.
Summary of the invention
The object of the present invention is to provide a kind of opening major dimension to be more than or equal to the tungsten/molybdenum round rectangle crucible of 800mm, its structural stability is good, and adapt to the high-temperature heating requirement of high-temperature heater, processing cost is low.
Another object of the present invention is to the preparation method that above-mentioned crucible is provided.
A kind of high-temperature heater tungsten/molybdenum round rectangle crucible, the round rectangle crucible that described crucible is bottomless uncovered, longitudinal opening length is more than or equal to 800mm, described round rectangle crucible is surrounded by the two pieces of frame fillet end plates 1 be oppositely arranged and at least two blocks of side plates 2, vertical seam between each gusset piece 3 connects for riveted joint, and every bar founds seam 3 and is provided with at least four uniform riveting points 4.
As to further improvement of the present invention, the structure of described riveting point 4 is: the end face of two gusset pieces is oppositely arranged and forms vertical seam 3, vertical seam 3 inner and outer respectively arranges one piece of retainer panel and is overlapped between two gusset pieces, by integral through the through hole rivet on outer panels 5, gusset piece, wainscot 6 successively.
As to further improvement of the present invention, the wall thickness of described round rectangle crucible is more than or equal to 10mm.
As to further improvement of the present invention, the wall thickness of described round rectangle crucible is 10-20mm.
As to further improvement of the present invention, the quantity of described side plate 2 is that every side arranges 2-10 block.
The preparation method of foregoing high-temperature heater tungsten/molybdenum round rectangle crucible, described method is implemented as follows:
A, plate rolling, obtain tungsten/molybdenum-base alloy sheet material that thickness is greater than 10 mm;
B, plate cutting, obtain the sheet material of each parts according to a conventional method;
C, frame rounded end plate benging are shaping;
D, machined, complete the machined of each parts on demand;
Each parts are carried out riveted joint assembling, obtain high-temperature heater tungsten/molybdenum round rectangle crucible by E, assembling.
As to further improvement of the present invention, in described step C, the frame rounded end plate benging of tungsten-bast alloy plate is shaping is first tungsten-bast alloy plate is heated to 1200 DEG C ~ 1500 DEG C in heating furnace, is incubated 30 ~ 120 minutes, then hot bending;
The frame rounded end plate benging of molybdenum-base alloy plate is shaping is first tungsten-bast alloy plate is heated to 1100 DEG C ~ 1400 DEG C in heating furnace, is incubated 30 ~ 120 minutes, then punching press hot bending in mould;
As to further improvement of the present invention, in described step e, the advanced row grinding of all parts vertical seam docking end face, grinding process, then splice.
Beneficial effect of the present invention is: the high-temperature heater tungsten/molybdenum round rectangle crucible designing acquisition by the present invention, because its frame fillet end plate is structure as a whole, high-temperature heater of the present invention tungsten/molybdenum round rectangle crucible is made to only have longitudinal spliced vertical seam, and vertical seam negligible amounts, ensured in the rigidity of short transverse.Because vertical seam adopts riveting method, every bar stands to seam and is equipped with at least four uniform riveting points, and inside and outside two pieces of retainer panel effectively enhance the cross section intensity connected between sheet material, the connection close and firm between each parts, is also conducive to the overall construction intensity improving crucible.On the other hand, in crucible lifting temperature process, the flexible change in size of crucible can mainly be carried out along opening major dimension, can by reducing the modes such as the coefficient of friction of crucible and base plate, alleviate the frictional resistance because of crucible and base plate and the problem that causes crucible upper-lower section to shrink inconsistent, short transverse being out of shape.Because high-temperature heater tungsten/molybdenum round rectangle crucible need use as heater, during work, crucible body produces eddy current and generates heat under the effect of induction coil electric current, crucible heating property provided by the present invention is good, and whole crucible can bear the eddy current of more than 2000 amperes.
The present invention limits wall thickness and is greater than more than 10mm, is preferably 10-20mm further, and electric current can be avoided too to concentrate and cause sheet material to puncture or the phenomenon of temperature inequality.
Above-mentioned high-temperature heater tungsten/molybdenum round rectangle crucible is processed by method of the present invention, high-temperature heater tungsten/molybdenum round rectangle crucible that processing obtains and design size require that error is very little, except frame fillet end plate need shaping in a heated state except, remaining part can be processed at normal temperatures, power consumption of polymer processing significantly reduces, and to equipment without particular/special requirement, equipment cost is low.Due to without the need to adopting special-shaped sheet material and parts, for this expensive material of tungsten/Mo, materials of the present invention are economized, and cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of tungsten provided by the present invention/molybdenum round rectangle crucible.
Fig. 2 is tungsten provided by the present invention/molybdenum round rectangle crucible structure schematic front view.
Riveting structural representation when Fig. 3 is tungsten provided by the present invention/molybdenum round rectangle crucible making.
Fig. 4 is the structural representation top view of the riveting point 4 of tungsten provided by the present invention/molybdenum round rectangle crucible.
1, frame fillet end plate; 2, side plate; 3, vertical seam; 4, riveting point; 5, outer panels; 6, wainscot.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with accompanying drawing and example, the present invention is further elaborated.Should be appreciated that instantiation described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1: a kind of high-temperature heater tungsten round rectangle tungsten crucible, adopt tungsten alloy plate to make, described crucible is the round rectangle crucible of bottomless uncovered, the longitudinal opening length of described round rectangle crucible is 3122mm, width is 425mm, is highly 440 mm, and wall thickness is 13mm.Described round rectangle crucible is surrounded by the two pieces of frame fillet end plates 1 be oppositely arranged and two blocks of side plates 2, and the vertical seam 3 between each gusset piece is riveted joint connection.As shown in Figure 3, every bar founds seam 3 and is provided with eight uniform riveting points 4, as shown in Figure 4, the structure of described riveting point 4 is: the end face retention gap of two gusset pieces is oppositely arranged and forms vertical seam 3, vertical seam 3 inner and outer respectively arranges one piece of retainer panel and is overlapped between two gusset pieces, by integral through the through hole rivet on outer panels 5, gusset piece, wainscot 6 successively.
The preparation method of foregoing high-temperature heater tungsten round rectangle crucible, tungsten alloy slab is adopted to make raw material, Rolling Production obtains the thick sheet material of 13mm, then the sheet material of following specification is cut into: 2 pieces (for making frame fillet end plate) of 13*440*730mm, 6 pieces (for doing side plate) of 13*440*985mm, 16 pieces (for doing retainer panel) of 4*100*430mm, then be strike out the elbow that both sides exceed bottom surface 150mm respectively in a mold after 2 blocks of sheet materials of 13*440*730mm are incubated 30 minutes at the temperature of 1400 DEG C by specification, obtain frame fillet end plate.According to a conventional method each parts are carried out the machineds such as boring again, then each piece of sheet material two ends are carried out grinding with and sand papering process to polishing, assembling, with gas welding, rivet is heated to red heat, is riveted tightly in connection place, to produce specification be length/width/height is the tungsten round rectangle crucible of 3122/425/440mm, its total vertical seam 8.After this tungsten round rectangle crucible uses 120 hours at the temperature of 1450 DEG C, crucible distortion is little, reaches designing requirement.
In the present embodiment, the frame rounded end plate benging of tungsten-bast alloy plate is shaping is first tungsten-bast alloy plate is heated to 1400 DEG C in heating furnace, is incubated 30 minutes, then punching press hot bending in mould; Above-mentioned technique is high for the hot-short transition temperature of tungsten, the characteristic of slab poor processability and arranging, and makes these parts carry out bending and riveting under red heat state, and tungsten-bast alloy sheet material recrystallization can be avoided brittle.
In the present embodiment, before each parts sheet material assembling, sheet material is carried out grinding and grinding process, solves the compactness of tungsten-bast alloy sheet material connection place laminating, thus ensure its electric conductivity.
Embodiment 2: a kind of high-temperature heater molybdenum round rectangle crucible, adopt molybdenum alloy plate to make, described crucible is the round rectangle crucible of bottomless uncovered, the longitudinal opening length of described round rectangle crucible is 900mm, width is 600mm, is highly 400 mm, and wall thickness is 11mm.Described round rectangle crucible is surrounded by the two pieces of frame fillet end plates 1 be oppositely arranged and four blocks of side plates 2, and the vertical seam 3 between each gusset piece is riveted joint connection.As shown in Figure 3, every bar founds seam 3 and is provided with eight uniform riveting points 4, as shown in Figure 4, the structure of described riveting point 4 is: the end face retention gap of two gusset pieces is oppositely arranged and forms vertical seam 3, vertical seam 3 inner and outer respectively arranges one piece of retainer panel and is overlapped between two gusset pieces, by integral through the through hole rivet on outer panels 5, gusset piece, wainscot 6 successively.
The preparation method of foregoing high-temperature heater molybdenum round rectangle molybdenum crucible, molybdenum alloy slab is adopted to make raw material, Rolling Production obtains the thick sheet material of 11mm, then the sheet material of following specification is cut into: 2 pieces (for making frame fillet end plate) of 11*400*778mm, 2 pieces (for doing side plate) of 11*400*700mm, 8 pieces (for doing retainer panel) of 4*100*400mm, then be strike out the elbow that both sides exceed bottom surface 100mm respectively in a mold after 2 blocks of sheet materials of 11*400*778mm are incubated 120 minutes at the temperature of 1500 DEG C by specification, obtain frame fillet end plate.Then each piece of sheet material two ends are carried out grinding and sand papering process to polishing, boring, assembling, is heated to red heat with gas welding by rivet, is riveted tightly connection place.According to a conventional method each parts are carried out the machineds such as boring again, then each piece of sheet material two ends are carried out grinding and sand papering process to polishing, assembling, with gas welding, rivet is heated to red heat, is riveted tightly in connection place, to produce specification be length/width/height is the tungsten round rectangle crucible of 900/600/400mm, its total vertical seam 8.After this tungsten round rectangle crucible uses 120 hours at the temperature of 1450 DEG C, crucible distortion is little, reaches designing requirement.
Above embodiment is only the preferred embodiment of the present invention, it should be pointed out that to those skilled in the art, and under the premise without departing from the principles of the invention, done some improvement, also should be considered as protection scope of the present invention.
Claims (8)
1. high-temperature heater tungsten/molybdenum round rectangle crucible, it is characterized in that: described tungsten/bottomless uncovered of molybdenum round rectangle crucible, described tungsten/molybdenum round rectangle crucible is surrounded by the two pieces of frame fillet end plates (1) be oppositely arranged and at least two pieces of side plates (2), vertical seam (3) between described each gusset piece is riveted joint connection, and the vertical seam (3) of described every bar is provided with at least four uniform riveting points (4).
2. high-temperature heater tungsten according to claim 1/molybdenum round rectangle crucible, it is characterized in that: the structure of described riveting point (4) is: the end face of two gusset pieces is oppositely arranged and forms vertical seam (3), described vertical seam (3) inner and outer respectively arranges one piece of retainer panel and is overlapped between two gusset pieces, integral by the rivet successively through outer panels (5), gusset piece, the upper through hole of wainscot (6).
3. high-temperature heater tungsten according to claim 1/molybdenum round rectangle crucible, is characterized in that: the quantity of described side plate 2 is that every side arranges 2-10 block.
4. high-temperature heater tungsten according to claim 1/molybdenum round rectangle crucible, it is characterized in that: the longitudinal opening length of described round rectangle crucible is more than or equal to 800mm, length-width ratio is 1/1-10/1, and the wall thickness of described round rectangle crucible is more than or equal to 10mm.
5. high-temperature heater tungsten according to claim 4/molybdenum round rectangle crucible, is characterized in that: the wall thickness of described round rectangle crucible is 10-20mm.
6. the preparation method of high-temperature heater tungsten/molybdenum crucible as described in claim 1-5 any one, is characterized in that:
Described method is implemented as follows:
A, plate rolling, obtain tungsten/molybdenum-base alloy sheet material that thickness is greater than 10 mm;
B, plate cutting, obtain the sheet material of each parts according to a conventional method;
C, frame rounded end plate benging are shaping;
D, machined, complete the machined of each parts on demand;
Each parts are carried out riveted joint assembling, obtain high-temperature heater tungsten/molybdenum round rectangle crucible by E, assembling.
7. the preparation method of high-temperature heater tungsten/molybdenum crucible according to claim 6, it is characterized in that: in described step C, the frame rounded end plate benging of tungsten-bast alloy plate is shaping is first tungsten-bast alloy plate is heated to 1200 DEG C ~ 1500 DEG C in heating furnace, be incubated 30 ~ 120 minutes, then punching press hot bending in a mold; The frame rounded end plate benging of molybdenum-base alloy plate is shaping is first molybdenum-base alloy plate is heated to 1100 DEG C ~ 1400 DEG C in heating furnace, is incubated 30 ~ 120 minutes, then punching press hot bending in a mold.
8. the preparation method of high-temperature heater tungsten/molybdenum crucible according to claim 6, is characterized in that: in described step e, the advanced row grinding of all parts vertical seam docking end face, grinding process, then splices.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108168304A (en) * | 2016-12-07 | 2018-06-15 | 成都虹波实业股份有限公司 | A kind of tubular heating element of tungsten or molybdenum heater and preparation method thereof |
| CN110657672A (en) * | 2019-10-18 | 2020-01-07 | 西安成航炉业有限公司 | Rectangular heating body structure of tungsten-molybdenum sintering furnace |
| CN110657673A (en) * | 2019-10-18 | 2020-01-07 | 西安成航炉业有限公司 | Square heating element device of tungsten-molybdenum sintering furnace |
| CN113686159A (en) * | 2021-08-31 | 2021-11-23 | 北京航星机器制造有限公司 | High-temperature furnace |
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| CN108168304A (en) * | 2016-12-07 | 2018-06-15 | 成都虹波实业股份有限公司 | A kind of tubular heating element of tungsten or molybdenum heater and preparation method thereof |
| CN110657672A (en) * | 2019-10-18 | 2020-01-07 | 西安成航炉业有限公司 | Rectangular heating body structure of tungsten-molybdenum sintering furnace |
| CN110657673A (en) * | 2019-10-18 | 2020-01-07 | 西安成航炉业有限公司 | Square heating element device of tungsten-molybdenum sintering furnace |
| CN113686159A (en) * | 2021-08-31 | 2021-11-23 | 北京航星机器制造有限公司 | High-temperature furnace |
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