CN101111323A - Shaped direct chill aluminum ingot - Google Patents
Shaped direct chill aluminum ingot Download PDFInfo
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- CN101111323A CN101111323A CNA200580047268XA CN200580047268A CN101111323A CN 101111323 A CN101111323 A CN 101111323A CN A200580047268X A CNA200580047268X A CN A200580047268XA CN 200580047268 A CN200580047268 A CN 200580047268A CN 101111323 A CN101111323 A CN 101111323A
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Abstract
Method and apparatus for forming aluminum ingot (20) having shaped ends (30) to avoid alligatoring during rolling.
Description
The application requires the U.S. Provisional Application No.60/639 of submission on December 27th, 2004,210 rights and interests, and this provisional application is hereby incorporated by.
Technical field
The present invention relates to the aluminium ingot of casting, especially, relate to aluminium ingot with forming ends.
Background technology
In the upright casting process of aluminium ingot, because the contraction in the solidification process, the top of ingot can stay shallow depression.The bottom of ingot is normally flat.In the process of rolling this ingot, and roll superficial layer that rod contacts internal layer and bear bigger distortion than ingot.When this ingot was rolling on reversible mill, this had caused top shallow depression and flush end to extend.This just produces a problem, and promptly this end that is recessed in rolling stock has formed alleged " crocodile mouth " type crack, this area.Even if top depression is removed, because rolling character still can form crocodile rictus seam.Crocodile rictus seam must be removed, and this causes producing waste material, and waste material is a key factor of determining the rate of recovery of ingot.If depression is not removed, just processing problems can occur in the future.Therefore, be badly in need of that a kind of method and system solves this problem so that increase the metal recovery rate of ingot.
In the past, adopted some modes to address this is that.For example, United States Patent (USP) the 6th, 453 discloses a kind of method and apparatus that is used for reducing in the operation of rolling of slab and ingot crop end loss for No. 712, and this method and apparatus relates to forming and has the butt end of special tectonic or moulding and the slab ingot of optional head end.Special shape is by machined, forging and preferably pass through casting formation.The special shape at this butt end place forms by big brick at the bottom of the bag of specially-shaped or starting big brick (starter block) in casting process.The special shape of bag end big brick is delivered to the end of ingot casting.The butt end of the specially-shaped of tabular ingot is rectangle and have vertical outward extending enlarged portion normally, and this enlarged portion is downward-sloping towards the center channel region of depression.The side of the channel region of this enlarged ends and this depression has the taper or the curved edges of horizontal expansion.When hot backform (the hot top mould) casting of adopting specially-shaped was finished, the head end of this ingot can have similar shapes, perhaps formed similar shapes by machined or the head end that forges this foundry goods.Subsequently in reversing rougher in the process of hot rolling, the slab ingot of specially-shaped can make the probability of overlapping of formation and tongue-like part (tongue) minimize, thereby improves milling train efficient by the metal throughput that reduces end crop end loss raising material yield rate and pass through to increase in the milling train.
United States Patent (USP) the 4th, 344, disclose a kind of technology No. 309, this technology comprises a kind of method that forms in the slab process, in this technology, recess along thickness direction is formed on a pair of on the surface of described steel ingot top and each end, bottom, not rolling as yet subsequently central part is rolled down to described concave depth, and then, the recess of broad ways is formed on aforesaid same end, next, not rolling as yet central part is rolled down to the described concave depth of broad ways; And, when described along thickness direction the thickness direction when rolling to reduce value be Δ H
TAnd it is Δ H that the width along described broad ways when rolling reduces value
WThe time, Δ H
W/ Δ H
TBe adjusted in 0.40～0.65 the scope, material has relatively large thickness and this material in this scope side profile presents biconvex and plays Δ H
W/ Δ H
TBe adjusted to 0.3 or littler scope in the time, the side profile that this material has less relatively thickness and this material presents single projection; Thereby prevented that the fish tail end from increasing, and then can reduce, finally increased substantially rolling output by fish tail end and overlapping double-deck tabular crop end loss that constitutes.
United States Patent (USP) the 4th, 587 discloses a kind of equipment and method No. 823, its make width be not more than three times of width of plate slab on a large scale in the semicontinuous rolling of product become possibility.The front end of slab between conical die forging or upsetting so that the width of described end is reduced to value less than the expected width of groove end gradually.This slab passes the edging edger roll of trough of belt to reduce its width and to enter in the roller of breakdown stand then.Edger roll is used for the metal of excessive filling is moved to the cavity that is formed by mould.Along with the tail end of slab near breakdown stand, this edging edger roll recession can side direction launch the tail end of this slab.Along with this slab leaves this breakdown stand, it is rolling to reduce expansion and to make the tail end of expansion have both sizings between the edging edger roll of trough of belt.This operation makes this tail end, and heart place is outstanding backward therein, thus compensation fish tail end.This breakdown stand is reverse then, and this slab is rolling again in opposite direction in an identical manner.
United States Patent (USP) the 1st, 603, disclose for No. 518 a kind of avoid forming ear or cup point thereon roll the ingot method, this method comprises: the ingot with predetermined end size is provided; Thereby the depth minus that the temperature of predetermined this ingot reaches with respect to described end size is used in whole end regions with respect to the mobile equably basically end surface of the body of this ingot so that effectively extrude masterpiece in a small amount.
United States Patent (USP) the 4th, 608 discloses a kind of method of operating milling train in some way, adopts this mode can avoid producing alligatoring when metal slabs are reduced by milling train effect thickness for No. 850.This slab rolling pass that process repeats in milling train is to make slab thickness reduce scheduled volume in each rolling pass.This method comprises the following steps: to analyze the rolling pass of this slab; Record has possibility makes this slab produce the rolling pass of the combination of the inlet thickness of alligatoring and careless reduction.Next the nose of the non-taper of this slab is addressed in the roll gap of milling train, if the combination of inlet thickness and careless reduction is the combination that can not produce alligatoring, then this slab passes milling train to reduce its thickness according to rolling pass.Yet, if the combination of inlet thickness and careless reduction is to cause being easy to causing this slab to produce the combination of alligatoring, thus then this method size of changing the working clearance of milling train inlet thickness of combination with this inlet thickness and careless reduction being become do not produce alligatoring and the combination of careless reduction.The nose of this slab is introduced in the roll gap of the milling train that has changed the working clearance then, and in case the nose of slab enters the roll gap of milling train, then its working clearance just returns to the size that can make this slab produce predetermined reduction and obtain predetermined thickness.
United States Patent (USP) the 4th, 593 discloses for No. 551 and a kind ofly to make the slab end produce the method that reduces slab thickness under the condition of alligatoring defective in meeting, and this method comprises the following steps: to make at least one end of this slab to be tapered; This slab is introduced milling train.The thickness of the tapering point of this slab reduces in milling train, and the thickness decrease passes milling train along with tapering point and increases.Slab continues across milling train to reduce its thickness.The end of this slab is tapered and passes once more milling train once more, each described tapering provides the combination of inlet thickness and thickness decrease, thereby makes the decrease of each conical region that the slab end is produced in the inlet thickness and thickness decrease zone of alligatoring.The thickness of the non-tapering part of residue of this slab is in milling train, be reduced in inlet thickness that may form alligatoring and thickness decrease zone.
The United States Patent (USP) mat woven of fine bamboo strips 4,387, a kind of method and apparatus that is used for the rolling rolling stock of broad ways is disclosed for No. 586, wherein, the end of the length direction of the rolling stock of flat metal form---it may be the very big metallic plate of width with respect to thickness---is by the compression process moulding, thereby this rolling stock is maintained fixed the end that makes its length direction in some way and forms the part that width reduces gradually simultaneously, in this part, width reduces gradually towards the end of rolling stock, the minimum widith of the part that this width between the end that the uniform part of width links to each other with the part that part links to each other and its width equals with this width reduces gradually that width reduces gradually and the end of rolling stock reduces gradually.Then, the rolling stock broad ways is rolling, thereby the fish tail end that the rolling stock end produces can reduce greatly.
Summary of the invention
However, still be badly in need of a kind of technology of the economy that has solved crocodile rictus seam problem and system with the metal recovery rate that increases ingot and reduce waste material.
An object of the present invention is to improve the rolled metal rate of recovery of ingot.
Another object of the present invention provides a kind of casting ingot method of novelty.
A further object of the present invention is the moulding ingot end that a kind of novelty is provided in casting cycle, and this ingot end can not form crocodile rictus seam in the operation of rolling.
Another purpose of the present invention provides big brick at the bottom of a kind of bag of novelty of the molten aluminum that is used to cast.
Another purpose of the present invention is to reduce or eliminate ingot end check seam when being rolled down to thin thickness at the end shape that a kind of novelty is provided on the ingot.
By specification, accompanying drawing and appended claim, these and other purpose will become obvious.
According to these purposes, thereby the invention discloses a kind of rolling aluminium ingot so that avoid the method for alligatoring when the thickness that reduces this ingot is produced slab or thin plate, this ingot is rolling in milling train, wherein this ingot a plurality of rolling passes of process in milling train.This method comprises: milling train is provided and provide treat rolling ingot, this ingot comprise treat rolling back to the surface and have at least one shaping or forming ends.This forming ends comprises tapered portion, this tapered portion be in the rolling direction and with treat the rolled surface angulation in 2 ° to 20 ° scope, and this tapered portion is extended to the thickness direction of this ingot towards the end of this ingot.This forming ends has that link to each other with conical surface, outside curved surface or circular surface, and this curved surface or circular surface extend so that forming ends to be provided across rolling direction.This ingot is thick and the length of this ingot is extended to produce slab or thin plate to reduce ingot through a plurality of rolling passes in milling train, and this slab or thin plate do not have alligatoring.
The present invention comprises that also a kind of production has the aluminium ingot of forming ends so that avoid the method for alligatoring when reducing the thickness of this ingot in the operation of rolling, and this ingot is rolling in milling train, wherein this ingot in milling train through a plurality of rolling passes.This method comprises: big brick had the ingot of forming ends at the bottom of the casting machine of the aluminium ingot that is provided for casting, this casting machine comprised the rectangle shaping mould and be engaged in wherein bag to begin to cast.Bag end big brick has the upper surface that is used to admit molten aluminum, and this upper surface has two opposite faces toward each other, that inwardly be tapered and ends at a round nose so that be used for providing shaping or forming ends on the rolling ingot casting.After the casting, this ingot casting has at least one forming ends, this forming ends comprise two towards the end, the surface that inwardly is tapered, this conical surface becomes 2 ° to 20 ° angle with the rolling direction traversed by and with treating rolled surface.This forming ends further comprises and this conical surface curved surface that link to each other, outside or convex surface, this curved surface with the direction of rolling direction traversed by on extend to provide and be shaped or forming ends.Be provided for being cast into the molten aluminum of ingot.This ingot casting is thick and the length of this ingot is extended to produce slab or the thin plate that does not have alligatoring to reduce ingot through a plurality of rolling passes in milling train.
The present invention also comprises big brick at the bottom of the bag of the specially-shaped that is used for production moulding ingot end, and the probability of the generation alligatoring of this moulding ingot end in the operation of rolling subsequently minimizes.The waste material that control ingot end shape according to the present invention can significantly reduce when rolling produces.In addition, when casting finished, forming ends was formed on the top that top mold is used in this ingot.
Description of drawings
Fig. 1 illustrates the sectional view that is used for molten aluminum is cast into the equipment of ingot.
Fig. 2 is the perspective end view of conventional aluminium ingot.
Fig. 3 and 4 (A, B, C) is the perspective end view according to ingot of the present invention.
Fig. 5 and 6 illustrates the end shape that has reduced the moulding ingot among Fig. 2 of 55%-4 by hot rolling.
Fig. 7 and 8 illustrates the end shape that has reduced the moulding ingot among Fig. 2 of 80%-4 by hot rolling.
Fig. 9 is the photomacrograph of two sample preparation product to be rolled.
Figure 10 is the photomacrograph by two samples shown in Figure 9 after the hot rolling reduced down in thickness 55%.
Figure 11 is the photomacrograph by two samples shown in Figure 9 after the hot rolling reduced down in thickness 80%.
Figure 12 is the end cross-section with ingot of 10 ° of conical surfaces.
Figure 13 is the end cross-section with ingot of 15 ° of conical surfaces.
Figure 14 is the end cross-section with ingot of 20 ° of conical surfaces.
The specific embodiment
Referring to Fig. 1, this illustrates the preferred implementation of the present invention of the aluminium ingot that is used to cast.The holding furnace 10 that contains molten aluminum 12 shown in Fig. 1.Molten aluminum can pass Rose Box 14 to remove fine particle.Then, molten aluminum is by gauge rod 16 metering and enter molten metal bath 17 in the mold 20, and molten aluminum is cured as the solidified ingot 22 that is supported by bag end big brick 24 in mold 20.Bag end big brick 24 reduces with the speed suitable with the curing degree in pond 17.Big brick 24 is depicted as to have according to cross-sectional configuration of the present invention.
In conventional ingot casting process, ingot end 30 (Fig. 2) is flat basically, on the ingot end seldom or do not have a bending.The bottom surface that this ingot has big, flat end face and is parallel to this end face substantially.Yet as pointed in the literary composition, this conventional ingot is when rolling, and superficial layer will bear the distortion bigger than its internal layer.This causes superficial layer, comprises the top surface and the basal surface of ingot, extends beyond the internal layer or the central core of metal.The results are shown among Fig. 5 of rolling this conventional ingot for example, will it is to be noted, the top layer 34 of metal and bottom 36 extend beyond the internal layer or the central core 38 of metal.This problem is aggravated with amount of rolling.For example, make reduced down in thickness by hot rolling at about 80% o'clock, the metal on top layer 34 and the bottom 36 can further extend to form alleged " crocodile mouth (the type crack (see figure 7) in this area.Should be understood that this crack that can produce a large amount of scrap metals must be removed.Therefore, should see, be badly in need of providing a kind of ingot that does not produce crocodile rictus seam.
The invention provides this ingot.Found can the moulding ingot the end to avoid forming crocodile rictus seam.That is to say, have been found that if the ingot end is provided with EOC or round nose, for example shown in Figure 3, the end of this ingot just can not produce the crack when then rolling.Described shape preferably is roughly the semicircle that extends along the width A-A of this ingot.Can adopt across about 10 ° to the 70 ° circular arc of thickness, shown in Fig. 4 A-4C in the end of this ingot.And top surface 22A and basal surface 22B can adopt 2 ° to 20 ° tapering.
So that explain orally the present invention, treat the photo of the slab after rolling or rolling with reference to Fig. 9,10 and 11 shown in the figure.Two are used for rolling aluminum slab shown in Fig. 9.The slab that should be pointed out that the top has conventional square or smooth end, and the slab of bottom has according to round nose of the present invention.Referring to Figure 10, every block of slab is by end metal flow or end shape after the hot rolling thickness minimizing 55% shown in the figure.Should be pointed out that conventional flush end produces crocodile rictus seam or crocodile mouth shape, and round nose thickness minimizing according to the present invention does not produce crocodile rictus seam.
Referring to Figure 11, will observe, when being rolled down to reduction 80% the time, the alligatoring of conventional flush end becomes bigger.In the figure, will observe, the crack further extends in the metal and metal level becomes the lamination shape.By contrast, even if reduce after 80% at thickness, the ingot with round nose does not demonstrate any crocodile rictus seam yet.As previously noted, can use in order to make rolled metal, must cut away or dismiss this crack, this has caused a large amount of metals to go out of use.
Preferred implementation of the present invention is illustrated among Fig. 4 a, 4b and the 4c.Has schematic diagram shown in Fig. 4 a according to the ingot 22 of forming ends of the present invention.Therefore, at first by providing the tapered portion of tapering between 2 ° to 20 ° to prepare this forming ends.5 ° tapering shown in Fig. 4 a and this tapering with the direction of rolling direction traversed by on extend across the width of ingot or slab.Tapering can extended distance X (Fig. 4 a).Tapered portion stops at rounded portions 30 places, and preferably this rounded portions comprises that radius is the circle segments of R.Radius R depends on the thickness of ingot or slab.For for example 15 ° big tapering, will observe, under the thick situation of identical ingot, radius is less.
The specially-shaped end of this ingot can form by machined, forging or compacting.Yet preferably this forming ends forms in casting cycle.As noted, this by the bag that adopts specially-shaped for example shown in Figure 1 at the bottom of big brick 24 water ingot casting and realize.Check that Fig. 1 will observe, bag end big brick 24 has crooked or circular surface 50 and conical section 52.Therefore, along with deposite metal 12 enters mold 20 and 24 held by bag end big brick, molten metal obtains the shape by surface 50 and 52 inner surfaces that limit.The top of ingot also can be by having required form the top mold moulding to finish ingot casting, wherein this top mold is filled with the deposite metal.Top mold can be adjustable hot backform or adjustable conventional mold or EMC mould.Therefore, can be under the situation that reduces waste material significantly rolling this ingot.Alternately, the top of ingot can prepare by forcing press or the forge that machined or employing have a mould of required structure.
Three ingots 30 are cast and scalped and then machined into the shape shown in Figure 12,13 and 14.10 ° first conical surface 40 is given first conical surface 42 of 1,15 ° on ingot and given ingot 2, and 20 ° first conical surface 44 is given ingot 3.Second portion cuts away from the end of ingot 1,2 and 3.Second conical surface 46 of ingot 1 is made for horizontal line and becomes 64 ° of angles, and second conical surface 48 of ingot 2 has 62 ° of angles, and second conical surface 50 of ingot 3 has 78 ° of angles.Should be understood that the scope of first conical surface is 2 ° to 25 °, the scope of second conical surface is about 50 ° or be less to about 80 °.This ingot is heated and is used for hot rolling then.This ingot under the situation that does not form the crocodile mouth from about 28 inch thickness hot rollings to 1.2 inch thickness.
Claims (29)
1. a rolling aluminium ingot is avoided the method for alligatoring when producing slab at the thickness that reduces this ingot, and this ingot is rolling in milling train, and wherein through a plurality of rolling passes, this method comprises this ingot in milling train:
(a) provide milling train;
(b) provide and treat that rolling ingot, this ingot have two big flattened side and at least one forming ends, this forming ends comprises:
(i) facing surfaces, it reduces towards described end, in described ingot so that conical surface to be provided, and described conical surface is along the rolling direction setting, described conical surface with treat that the rolled surface angulation is in 2 ° to 20 ° scope, and described conical surface extends towards described end, and
(ii) described end has the curved surface that links to each other with described conical surface, described curved surface with the direction of described rolling direction traversed by on extend so that described forming ends to be provided; And
(c) thus described ingot is extended with the thickness that reduces described ingot and the length that makes this ingot through a plurality of rolling passes in described milling train produces rolling stock, described material does not have alligatoring.
2. method according to claim 1, wherein, described conical surface is in 5 ° to 15 ° scope.
3. method according to claim 1, wherein, described curve approximation is in 1/2 circle.
4. method according to claim 1, wherein, the two ends of described ingot have conical surface and are provided with curved surface.
5. method according to claim 1 wherein, is formed by the shape of bag end big brick in casting cycle one of at least in the described end of described ingot, and aluminium is poured in casting cycle at the bottom of the described bag on the big brick.
6. method according to claim 1 wherein, forms by machined after this ingot shape becomes one of at least in the described end of described ingot.
7. method according to claim 1, wherein, the two ends of this ingot form in casting cycle so that described forming ends to be provided.
8. a production has the aluminium ingot of forming ends so that avoid the method for alligatoring when reducing the thickness of this ingot in the operation of rolling, and this ingot is rolling in milling train, and wherein through a plurality of rolling passes, this method comprises this ingot in milling train:
(a) be provided for the casting casting machine of aluminium ingot, big brick had the described ingot of described forming ends at the bottom of described casting machine comprised the rectangle shaping mould and is engaged in wherein bag to begin to cast, big brick has the upper surface that is used to admit molten molten aluminum at the bottom of the described bag, described upper surface has two toward each other, inwardly the opposite face and the described upper surface of convergent end at a round nose to be provided for rolling ingot casting, this ingot casting has at least one forming ends, and this forming ends comprises:
(i) facing surfaces, convergent is to provide conical surface towards described end, in described ingot for it, and described conical surface is arranged to become 2 ° to 20 ° angle with treating rolled surface, and described conical surface extends towards described end, and
(ii) described end has the curved surface that links to each other with described facing surfaces, described curved surface with the direction of described rolling direction traversed by on extend so that described forming ends to be provided;
(b) provide the molten aluminum of waiting to be cast into ingot;
(c) the described ingot of casting; And
(d) thus described ingot is extended with the thickness that reduces described ingot and the length that makes this ingot through a plurality of rolling passes in described milling train produces the rolling stock that does not have alligatoring.
9. method according to claim 8, wherein, described conical surface is in 5 ° to 15 ° scope.
10. method according to claim 8, wherein, described curve is roughly 1/2 circle.
11. method according to claim 8, wherein, the two ends convergent of described ingot also is provided with curved surface.
12. method according to claim 8, wherein, the two ends of this ingot form in casting cycle so that described forming ends to be provided.
Avoid the method for alligatoring when reducing the thickness of this ingot in the operation of rolling 13. a production has the aluminium ingot of forming ends, this ingot is rolling in milling train, and wherein through a plurality of rolling passes, this method comprises this ingot in milling train:
(a) provide the molten aluminum of waiting to be cast into ingot;
(b) be provided for the casting casting machine of aluminium ingot, big brick had the described ingot of described forming ends at the bottom of described casting machine comprised the rectangle shaping mould and is engaged in wherein bag to begin to cast, big brick has the upper surface that is used for admitting at this mould molten aluminum at the bottom of the described bag, and described upper surface has two toward each other, inwardly the relative face and the described upper surface of convergent end at a round nose to be provided for rolling ingot casting;
(c) the described ingot of casting, this ingot casting has at least one forming ends, and this forming ends comprises:
(i) facing surfaces, it has the conical surface that is provided with along rolling direction, the described conical surface in 2 ° to 20 ° scopes, and
The (ii) circular surface that links to each other with the described conical surface, described circular surface with the direction of described rolling direction traversed by on extend so that described forming ends to be provided;
(d) thus described ingot is extended with the thickness that reduces described ingot and the length that makes this ingot through a plurality of rolling passes in described milling train produces the slab that does not have alligatoring.
14. method according to claim 13, wherein, described circular surface comprises semicircle.
15. method according to claim 13, wherein, the described conical surface is in 5 ° to 15 ° scope.
Avoid the improvement system of alligatoring when reducing the thickness of this ingot in the operation of rolling 16. a production has the aluminium ingot of forming ends, this ingot is rolling in milling train, and wherein through a plurality of rolling passes, this improvement comprises this ingot in milling train:
(a) bag end big brick, it is used for being inserted into the upright casting of rectangle shaping mould with the beginning ingot, and big brick has at the bottom of this bag:
(i) be used to admit the top surface of molten aluminum, molten aluminum solidifies on this top surface;
And
(ii) this top surface has two opposite faces, and described two opposite faces have the conical surface and end at a circular portion, and described surface has the conical surface that is provided with along the rolling direction of described ingot, this conical surface with treat that the rolled surface angulation is in 2 ° to 20 ° scope.
17. method according to claim 16, wherein, described circular surface comprises semicircle.
18. a rolling aluminium ingot so that when thereby the thickness that reduces this ingot is produced slab, avoid the method for alligatoring, this ingot is rolling in milling train, wherein should be in milling train ingot through a plurality of rolling passes, this method comprises:
(a) provide milling train;
(b) provide and treat rolling ingot, this ingot has two big flattened side and at least one forming ends, this forming ends comprises: facing surfaces, its towards described end in described ingot convergent, described conical surface is along the rolling direction setting, described conical surface with treat the rolled surface angulation in 2 ° to 20 ° scope, and described conical surface extends towards described end, and
(c) thus described ingot is extended with the thickness that reduces described ingot and the length that makes this ingot through a plurality of rolling passes in described milling train produces rolling stock, described material does not have alligatoring.
19. method according to claim 18, wherein, described conical surface is arranged to 5 ° to 15 ° angle.
20. method according to claim 18, wherein, the two ends of described ingot are convergents.
21. method according to claim 18 wherein, is watered by the shape of bag end big brick in casting cycle one of at least in the described end of described ingot and formed, aluminium is poured in casting cycle at the bottom of the described bag on the big brick.
22. method according to claim 18, wherein, second conical surface forms from described first conical surface and extends.
23. method according to claim 22, wherein, described second conical surface is arranged to 50 ° to 80 ° angle.
Avoid the method for alligatoring when reducing the thickness of this ingot in the operation of rolling 24. a production has the aluminium ingot of forming ends, this ingot is rolling in milling train, and wherein through a plurality of rolling passes, this method comprises this ingot in milling train:
(a) be provided for the casting casting machine of aluminium ingot, big brick had the described ingot of described forming ends at the bottom of described casting machine comprised the rectangle shaping mould and is engaged in wherein bag to begin to cast, big brick has the upper surface that is used to admit molten aluminum at the bottom of the described bag, described upper surface has two opposite faces, the conical surface that described two opposite faces have toward each other, inwardly form also ends at an end to be provided for rolling ingot casting, this ingot casting has at least one forming ends, and this forming ends comprises:
(i) facing surfaces, first conical surface that it has towards described end, forms in described ingot, the described conical surface be along the rolling direction setting, the described conical surface with treat that the rolled surface angulation is in 2 ° to 20 ° scope, and the described conical surface extends towards described end, and
(ii) described end, it has second conical surface that links to each other with described first conical surface, and described second conical surface extends on rolling direction so that described forming ends to be provided;
(b) provide the molten aluminum of waiting to be cast into ingot;
(c) the described ingot of casting; And
(d) thus described ingot is extended with the thickness that reduces described ingot and the length that makes this ingot through a plurality of rolling passes in described milling train produces the rolling stock that does not have alligatoring.
25. method according to claim 24, wherein, described first conical surface is in 5 ° to 15 ° scope.
26. method according to claim 24, wherein, described second conical surface is in 50 ° to 80 ° scopes.
27. method according to claim 24, wherein, the two ends of this ingot form in casting cycle so that described forming ends to be provided.
28. an ingot casting that is used to be rolled into the flat rolled product, this ingot casting has at least one forming ends, and this forming ends comprises:
(a) facing surfaces, it has the conical surface that is provided with along rolling direction, the described conical surface in 2 ° to 20 ° scope, and
(b) circular surface, it links to each other with the described conical surface, and described circular surface extends so that described forming ends to be provided across described ingot.
29. the casting aluminium ingot with at least one forming ends comprises:
(a) facing surfaces, first conical surface that it has towards described end, forms in described ingot, the described conical surface forms along rolling direction, the described conical surface with treat that the rolled surface angulation is in 2 ° to 20 ° scope, and the described conical surface extends towards described end, and
(b) described end its have second conical surface that links to each other with described first conical surface, described second conical surface along rolling direction so that described forming ends to be provided.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63921004P | 2004-12-27 | 2004-12-27 | |
| US60/639,210 | 2004-12-27 | ||
| US11/286,401 | 2005-11-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101111323A true CN101111323A (en) | 2008-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200580047268XA Pending CN101111323A (en) | 2004-12-27 | 2005-12-16 | Shaped direct chill aluminum ingot |
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| Country | Link |
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| CN (1) | CN101111323A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108724890A (en) * | 2018-04-25 | 2018-11-02 | 东北轻合金有限责任公司 | A kind of production method of the aluminium alloy compound plate and strip blank of middle layer alloy side low-angle milling |
| CN112629803A (en) * | 2020-12-08 | 2021-04-09 | 西北工业大学 | Wind tunnel test section model support structure with leading edge bionic noise reduction structure |
-
2005
- 2005-12-16 CN CNA200580047268XA patent/CN101111323A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108724890A (en) * | 2018-04-25 | 2018-11-02 | 东北轻合金有限责任公司 | A kind of production method of the aluminium alloy compound plate and strip blank of middle layer alloy side low-angle milling |
| CN112629803A (en) * | 2020-12-08 | 2021-04-09 | 西北工业大学 | Wind tunnel test section model support structure with leading edge bionic noise reduction structure |
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