CN2162318Y

CN2162318Y - Strong steel ingot mould of steel net

Info

Publication number: CN2162318Y
Application number: CN 93210679
Authority: CN
Inventors: 李洪德
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-21
Filing date: 1993-04-21
Publication date: 1994-04-20
Anticipated expiration: 2003-04-21

Abstract

The utility model discloses a reinforced steel ingot mould of steel nets. The utility model uses the composite reinforcement of the steel net in the mould wall and a base body to greatly improve the strength of the steel ingot mould according to the reinforced principle of composite materials such as reinforced concrete, etc. The technology of the casting boronizing and metal core existing in the prior art is adopted simultaneously, a layer of mottled structure is formed on the inner side of the mould wall, and thus the ability of anti-oxidation growing and the ability of anti-cracking and damage are obviously improved. The reinforced steel ingot mould of steel nets of the utility model can avoid or delay the mould wall deforming and cracking, and can avoid or delay the oxidation growing and cracking and damage of the inner surface. The service life of the utility model is greatly prolonged and the production cost is reduced. The utility model is suitable for casting the steel ingot mould with various materials and various sizes.

Description

Strong steel ingot mould of steel net

The utility model relates to a kind of improved ingot mould, particularly a kind ofly can avoid or delay the ingot mould that die wall distortion, cracking and inner surface oxidation growth and be full of cracks lose flesh.Be suitable for making the ingot mould of various materials and specification.

The material of now domestic and international ingot mould mainly is a gray iron, wriggle iron and magnesium iron, sees " iron and steel " 1988(3): 21.Because the graphite nodulizing rate of the spheroidization of graphite rate of magnesium iron mould and the swage of wriggling is difficult to control in big production, be difficult for promoting.China accounts for 80% of ingot mould total burn-off still based on grey swage at present, sees " foundry engieering " 1992(6): 3.Because ingot mould in use is subjected to swashing influences such as heat and creep, many ingot mould initial failures.Wherein the inefficacy of grey swage is based on crackle in length and breadth, and it is auxilliary that inner surface oxidation growth and be full of cracks lose flesh.Wriggle the inefficacy of swage based on crackle in length and breadth, and distortion card ingot is auxilliary.The inefficacy of magnesium iron mould is based on distortion card ingot, in length and breadth crackle and tortoise to lose flesh be auxilliary, see " iron and steel " 1988(3): 23, table 8 and " foundry engieering " 1992(6): 3.For improving the service life of ingot mould, Anshan iron and steel plant produces curved surface magnesium iron ingot mould, and its deformation extent is alleviated, and has improved service life.But the cracking of curved surface ash swage increases the weight of, and descend to service life, sees " iron and steel " 1989(12): 29.Soviet Union Dun Nieci Metallurgical Factory carries out the vibration processing of 40-50Hz frequency to the new ingot mould that is about to come into operation, and eliminates internal stress, has improved 10-11% service life, sees " external iron and steel " 1993(1): 59.University of Science ﹠ Technology, Beijing adopts the method for casting-boronizing, makes the inner surface of gray iron ingot mould generate layer of even fiber crops mouthful tissue, and the ability that its anti-oxidant growth and be full of cracks are lost flesh improves greatly, and the military service number of times has improved 43%, sees " foundry engieering " 1992(6): 3.The gray iron that the Hunan steel adopts potassium-sodium that casting rimming steel ingot mould the is used processing of going bad makes improve 9.6% the service life of ingot mould, sees " economic technology information " 1993(2): 8.Though above prior art has improved the service life of ingot mould to some extent, can't control effectively the cracking of ingot mould.Especially the big section steel ingot that rolling Wide and Thick Slab is used requires the size of ingot mould to increase, and distortion and cracking problem will be more outstanding.For this reason, be necessary to develop a kind of novel ingot mould fully that on strengthening principle, belongs to.

Task of the present utility model is that a kind of novel ingot mould fully will be provided, and distortion, cracking and inner surface oxidation growth and be full of cracks that it could avoid or delay ingot mould effectively lose flesh.Increase substantially its service life.

The utility model is to realize like this.Be bent into and the similar steel mesh of ingot mould shape that will cast after cutting out with welding such as reinforcing bar, wire rod, braiding or with steel wire, steel plate pressing mesh.Also can make several net sheets respectively, be combined into steel mesh.This steel mesh can be the single or multiple lift various types.Its size is not appeared up and down or be advisable concordant with the surface so that it is between the surfaces externally and internally of the ingot mould that will cast.Reinforcing bar and wire rod etc. are along level and vertically both direction distribution, and its diameter and distribution density are decided on the size of ingot mould.Fuse and outer container that the cast steel ingot mould is used have served as a contrast type sand, paint, go into the stove oven dry.The back horse back of coming out of the stove oozes paint brush to the boracic casting in core surface, by the waste heat air dry.The concrete composition that contains boron dope is seen " foundry engieering " 1992(6): 3.Also can adopt metal-coredly, preheating is coated with common coating and suitably increases coating layer thickness, to regulate the thickness of fiber crops mouthful layer.Steel mesh is covered on the fuse.Install outer container and the loam cake that has cast gate, rising head.Steel mesh is cast among the die wall.

Steel mesh of the present utility model is strengthened ingot mould, strengthening principle according to composites such as armored concrete, utilize steel mesh and matrix complex intensifying in the die wall, on the basis of not losing the original advantage of matrix, improve its combination property significantly, especially resist the performance of crackle expansion.Its mechanism is, between reinforcing bar and wire rod etc. and the ingot mould matrix interface arranged, and this interface can intercept the crackle in the matrix, makes it can not enter bodies such as reinforcing bar and wire rod.Like this, the cracking of die wall has different mechanism with the fracture of reinforcing bar and wire rod etc.Die wall is to produce fire check and expansion and ftractureing in matrix under the thermal stress effect.Reinforcing bar and wire rod etc. are in the die wall, are difficult for producing fire check, are broken.According to Theory of Fracture Mechanics, distribute because stress is concentrated in the crackle forward position, the crackle in the metal just can expanded under the stress effect of its yield strength, breaking of metal then need be greater than the stress of its yield strength, see " Mechanical Property of Metal " China Machine Press, 1978.9.Thereby reinforcing bar and wire rod etc. can effectively stop the rapid expansion of fire check and make ingot mould continue under the situation of the crackle of bleed-out water not to be on active service having.This is also similar with the existing method that the ingot mould curium of cracking is mended, and only cramp used in mending pottery or porcelain has been moved on to inside from the surface of die wall.Steel mesh can shorten setting time as internal densener in addition, reduces the composition segregation, and the combination property of ingot mould further improves in refined cast structure.Such as, improve 125% with the access times of reinforcing bar and the feed trumpet of cast iron composite casting than the access times of the feed trumpet of single cast iron quality casting, still in use, see " metal Leader, the world " 1992.12.19.In addition, owing to adopted existing casting-boronizing and metal-cored technology, form fiber crops mouthful tissue, can improve the ability that anti-oxidant growth of ingot mould inner surface and be full of cracks lose flesh at the inner surface of ingot mould.Compare with above-mentioned prior art, this kind steel mesh reinforcement ingot mould can avoid or delay its distortion that in use produces, cracking and inner surface oxidation growth effectively and be full of cracks loses flesh.Improve service life significantly.

The material that steel mesh of the present utility model is strengthened used reinforcing bar of ingot mould and wire rod etc. is preferably selected for use or is specially had the steel grade that suppresses the grain growth ability more by force, an also available straight carbon steel under the condition of high temperature.Matrix can be with gray iron, wriggle iron or magnesium iron etc.As adopting casting-boronizing method and metal-cored with the iron of wriggling.

Is that example is described in further detail utility model below in conjunction with accompanying drawing with ingot mould of the no end.

Fig. 1 depends on the schematic diagram that mold is manufactured steel mesh.

Outer container, steel mesh and fuse layout drawing when Fig. 2 is the cast steel ingot mould.

Fig. 3 is the cutaway view that steel mesh is strengthened ingot mould.

Manufacture mold (1) by the shape of the ingot mould that will cast.Can utilize the casting mold of cast steel ingot mould, increase the thickness of outer box sand, reduce the thickness of core sand, the casting mold.Also available shaped steel is welded.As use the multilayer steel mesh, need make the mold that a plurality of sizes are dwindled successively.Depend on mold (1) and manufacture steel mesh (2), each node of steel mesh (2) is welded.Fuse (3) and outer container (4) that the cast steel ingot mould is used have served as a contrast type sand, and paint is gone into the stove oven dry.After coming out of the stove, the surface of paint brush in fuse (3) oozed in the boracic casting at once, dry voluntarily by waste heat.As adopt metal-cored, after the preheating brush common coating.All bind straw rope or straw bag in the interior outside that four angles of steel mesh (2) and the upper, middle and lower of four face centres etc. are located, prevent to scratch the upward type sand of lining of fuse (3) and outer container (4).Steel mesh (2) is covered on the outside of fuse (3).Near the reinforcing bar supporting leg of straw rope that four angles, four faces are tied up or straw bag, burn-oning, with around the steel mesh (2) equidistant on fuse (3), as use the multilayer steel mesh, also should be at steel mesh interlayer weldering supporting leg, with constant spacing, prevent steel mesh (2) distortion and be shifted.Outer box hood outside steel mesh, is aligned.Cover the loam cake that has cast gate and rising head, align, fixing with clamp or bolt etc.Check and accept errorless after, the cast.After solidifying, remove outer container (4), hang out ingot mould.Stress relief annealing.Sand removal, mill are repaiied finished product.

Claims

1, the steel mesh that is fit to various materials of casting and gauge steel ingot mould is strengthened ingot mould, it is characterized in that being cast with steel mesh and matrix complex intensifying in the die wall of this kind ingot mould.

2, steel mesh according to claim 1 is strengthened ingot mould, it is characterized in that steel mesh has the various structures of individual layer and multilayer.