DE2009873B2 - DEVICE FOR THE CASTING OF SINGLE CRYSTAL CASTINGS - Google Patents

Description

the form 14 is filled out. The top of the mold is on top of the top of the. W "' ^se _M ^a _

I closed, and at the lowest point lid 20 ^^^^ J ^^ MWii-

the form 14 has a filling opening 17. nal gebUdet «» ν. ^^ _β Ε _η Ηβ _Γ heat loss

This object-forming hollow form 12 can ment of the filled alloy w J,

useful as a mask shape, e.g. B. after the wax 5 reduced to a minimum. In the ue κ

m.sschmelzverfahren. There is a central opening 22 present in w

is a lost form, in whose inner pouring funnel 24 is inserted. . _d

Cavity the single crystal casting to be formed with For casting the desired casting * approx

large horizontal dimension is created, and the entire device in «» H «« «i _u "

L brought the completion of the casting to the challenges and xo £ ™ JW ^ ^a ** _h * ° ™ J _'above the ^f

Solution of the casting is smashed. Appropriately and the sleeve 12, 12 on the Z ™ "™ £ ¹ % _{& muT}

such a mask shape becomes somewhat porous. Melting point of the alloy M & aae device

formed so that the air is de-heated during filling. Preferably one brings <U device

can give way. This hollow shape can be relatively thin - in a vacuum chamber, so aau

«SSÄ-.17 downward extending- S Κ ^ lend is a helically formed filling tube methods such as s _? There is also a md 18, through which a single crystal can grow into the ao script 3 260 505 besco «ben ^ suia form. DL · je · filling tube 18, if the shape M14 1. «^^ velches in Figs. 1 and 3 helically twisted ^ / ^u ^ * ^c jP? ^ J ^^^ riSr24 is shown, can be arbitrarily curved or ^ out - »" ^^ J ^ Ä Form U hemm and ,, be directed, provided that it is adequately poured, flows first around me : ror _h

Changes in direction allows the to, 5 to fill the: pod, 12, and rise, then "^ JJ ¹ * _M growing into the shape as a single crystal- the FJJ" * ^'18 ^ "^ pod and the shape selected grain exactly from all other grains or overall 14 or 14 ascends the sleeve • Ln runs can be detected with the filling tube, it is to be approximately bwι to the η with jw therefore sufficient if the curvature of the _{anschaul;....} gefu d, s FuUhohe " ^^^ ^^ Fällrohrs 18 a change of direction in de. · Horizontal 30 borrowed part of the Forml14i or J ⁴ ^ ^ _Küh] . Right level of at least 18CP allows Das Schme _1Z e ^^ ηοη ^^^ βηη ^ l ^

Downpipe se nerscits preferably has a middle plate ΐυ dzw. xu cij ^ cstiioiii., _o

i 'T with continuously increasing inclination on WjJCh ₁ Jn ^ v genchw erstairtem grain to the diameter of the fill tube 18 to the sufficiently full tube 18 and ¹ J? ² ^ ¹⁸ f, _a T? Erects solidified cross that relatively free flow of the liquid alloy 35 14 or 14 or 14 into it. The gencniei e Sng upwards into the hollow form 14 into Κο ™ Λ extends - -JJ ^ Win el ^ u

Ag ¹ > -da * S ^ fUi ³ IOi ¹ S £ Ä -r ^ b ^ is

tow 18 'is a vertical axis with reference to the which in the filling pipe 18 or 18 or S "" tte, 0 or 10 ·. DaC ", ch, d, ß the filling pipe," - »^,«! ^^^^ Κ

INTO THE

Solidification of the alloy inside and outside

close to the cooling plate 10 or 10 '

Incline of the bottom wall contributes to this bc., De Ke m- erhahen D «« Trenn ^^ _dje ^^^

Formation of undesired crystals at this right only _{da sj} _ _h ^ _{solidification}

Wall /.u avoid. In addition, the internal dimensions _{may vary}

of the low gradient wmk.ls d.ei horizontal Ah- 55 horizontal right bs to g _fc ^^ ^ ^ _

measuring the form over e.ne short height greatly the «™ ^ _g advances, only jcucils a

widen, so that the shape for the meal of cast-5j. ^r ^ _m ^W ^ ^ag M _{aterial> and} consequently is during

pieces with large honzonta he dimension he - ^ munuin an ^ ^ ^ _{n Mjnimum}

«■

recognize that the [lOOl-Onentierung axially ζ. the ^D ™ ens niKUi _Warmcgra serves can be pre-

5 6

/ on relatively flat panes, such as those used as a door - enables even more precise control of the heat

Oin disks can be used if they have gradients during the solidification of the alloy

from one of the resistant high temperature along the bottom wall of the form 14 ". The insulation

Alloys are cast. The with a cooling 30 is by an inner sleeve 32 against the

device equipped cooling plate 10 'carries the 5 molten alloy protected. On this sleeve

cylindrical sleeve 12 ', in which the objects 32 sit the supports 16 ". Around the head surface of the

forming mold 14 'is included. The latter is form 14 ″, a ring 34 made of filling cement is arranged.

held a certain distance from the inner sleeve 32 on supports 16 'above the cooling plate 10'

and is at a distance from both the cooling plate. This ring 34 also has the purpose of

10 'as well as from the sleeve 12'. The form u> Filling the device up to the level 26 "emergency

14 'is closed at its upper end. To reduce the amount of alloy material agile on the ground,

is the filling opening 17 '. The shape can, This embodiment of the invention

as already in connection with the form 14 the device is operated in practically the same way

F i g. 1 executed, operated as a mask shape of a known type, as is the case in connection with the in

be made. In this case, the mold wall can be compared to FIG. 1 described embodiment shown

has become comparatively much thinner than usual shapes.

be, since it is only a partition and can in principle with the invention

molten alloy both inside and device not just round castings but

outside of the form, the pressure on the wall - also those of other dimensions and designs

equals. Downwards to the cooling plate 10 'can be manufactured, for example, pipes, rods

extending is at the filling opening 17 'a screw or bars, in which the longitudinal axis is in one

shaped filling tube 18 'is present, extends through a small acute angle to the horizontal,

which the mold 14 'is filled. provided that the device according to the invention

In the in F i g. 4 illustrated embodiment- resulting crystal orientation is desired,

The form of the device according to the invention is additional. In the device according to the invention

lent to the also in the embodiment of the also several object-forming forms in one

F i g. 1 there may be a single sleeve in the form of a ring, so that several

Existing insulation 30 arranged, which are cast below individual castings at the same time

of the form 14 "and of this to a certain extent. In this case, the different

Distance away from the spiral-shaped filling pipe 18 ″ around which shapes are arranged in a ring to one another unc

gives. The insulation 30 alleviates this from having the upper ends of the filler tube under each other

sloping liquid alloy volume to be filled and connected.

1 sheet of drawings

Claims (2)

is whose bottom area is relative to the center Claims: Forming a small acute angle with the horizontal is inclined and its filling tube in the deepest 1, device for pouring single crystal-located point of the mold-arranged filling opening Castings with a large horizontal opening 5 ends, measurement in which an object-forming form with the device according to the invention leave with a lower filling tube in one of a sleeve in particular disks and similar counter-sheathed Space above its refrigerated booths, which are shaped so that they are a-ϊ vertical Base plate is arranged, characterized by having a disc axis, with the desired crystal draws, that the object-forming mold io orientation pour, one can be particularly advantageous a hollow mold (14, 14 ', 14 ") closed at the top, the device according to the invention for manufacturing with a relatively large diameter in the ratio of single crystal cast rods made from known l'ochzur The height is the bottom surface of which is towards the center temperature superalloys, such as those for example a relatively small acute angle with that described in U.S. Patent 3,260,505. Forming horizontal is inclined and its 15 which have a large dimension essentially right-hand filler tube (18 ', 18, 18 ") in the deepest angled to the [100] -orientation. Point of the mold (14, 14 ', 14 ") arranged filling- The slight slope of the bottom wall of the hollow mold opening (17,17 ') opens. in the device according to the invention contributes to this 2. Device according to claim i, characterized in that the nucleation of undesired crystals indicates that in the space between the 20 on this wall to avoid and freeze cooled base plate and the hollow mold (14 ") starting inside the mold and going all the way up partially filling this space an insulation progressing over the horizontal dimension (30) is present, which increases the overall width of the filling tube (18 ") in areas that are narrow in height a distance surrounds, and ensure that the head surface. It can therefore be special the hollow form (14 ") at a distance from the« 5, for example, discs, rods with a large diameter Sleeve has a ring (34) made of filling cement. or blocks with a large cross-section in the desired Manufacture orientation. It is advantageous if in the inventive Device in the space between the cooled 30 floor slab and the hollow shape partially filling this space there is an insulation that the Surrounds filling tube at a distance, and if the The invention relates to a device for the head surface of the hollow mold at a distance from the Casting single crystal castings with a large sleeve having a ring of filler cement. It will horizontal dimension, in which an object is thrown through the molten alloy Forming form with lower filling tube in one of the filling volumes reduced and one special a sleeve jacketed space above its precise control of the thermal gradient during the cooled base plate is arranged. Solidification of the alloy along the bottom wall A device of this kind is made possible by the French form. 40 Further details and advantages of the invention knows. With the known device in which one is the following description with reference to the object-forming form with lower filling tube in the embodiment illustrated in the drawing to form the device according to the invention in a space encased by a graphite sleeve above dci take the floor of this space forming. It shows Cooling plate is arranged, but only such 45 Fig. 1 can be a vertical section through an execution oriented single crystal castings are produced. form of a device according to the invention, the main axis of which is the vertical axis, the same - Fig. 2 is a section according to 2-2 of Fig. 1, has the largest dimension at the time. If, however, FIG. 3 is a vertical section through another what to achieve special mechanical own embodiment of a device according to the invention Shafts of castings can be advantageous, orientation, Produce oriented single crystal castings, which the Fi g. 4 shows a section through yet another have longest axis in the transverse direction, so embodiment of the device according to the invention the known device cannot be used. tung, and The invention is based on the object of FIG. 5 shows a cross section through a with the inven- In contrast to this, to create an improved device, 55 according to the device, cast disc, the with illustrating single crystal objects with relatively large preferred crystal orientation. Dimension cast at right angles to the main axis. 1 illustrated embodiment of can be. The device according to the invention has a cooling plate This object is achieved by means of a device 10 with a cooling device and a cylindrical sleeve device of the type described at the beginning for casting 6c 12, which closes the object-forming mold 14 around single crystal castings with a large horizontal dimension. The shape 14 is above and at a distance from the dimension at which an object-forming shape is supported by the cooling plate 10 through support elements 16 with the lower filling tube in one of a sleeve. The mold walls are located in a jacketed space above the cooled distance from the sleeve 12. The mold 14 is the base plate which, according to the invention, is cylindrical and has a diameter, characterized in that the opposing sides are almost as large ^: st like that of the sleeve 12. The forming shape, a hollow shape closed at the top with the height of the shape Ί4 is dimensioned so that the inner diameter in relation to the height space of the sleeve 12 to its essential part