CN101928822A - Cushion block of heating furnace - Google Patents
Cushion block of heating furnace Download PDFInfo
- Publication number
- CN101928822A CN101928822A CN 201010247099 CN201010247099A CN101928822A CN 101928822 A CN101928822 A CN 101928822A CN 201010247099 CN201010247099 CN 201010247099 CN 201010247099 A CN201010247099 A CN 201010247099A CN 101928822 A CN101928822 A CN 101928822A
- Authority
- CN
- China
- Prior art keywords
- resistant
- heat
- wear
- matrix
- cushion block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 49
- 239000011159 matrix material Substances 0.000 claims abstract description 46
- 238000005266 casting Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000000956 alloy Substances 0.000 claims description 43
- 229910045601 alloy Inorganic materials 0.000 claims description 42
- 239000000758 substrate Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 19
- 229910010293 ceramic material Inorganic materials 0.000 claims description 8
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 abstract description 22
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 description 21
- 238000010586 diagram Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 4
- 239000011195 cermet Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a cushion block of a heating furnace, which consists of a heat-resistant matrix and a heat-resistant wear-resistant part; the heat-resistant and wear-resistant piece is coated on the top of the heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the heat-resistant base body. The heating furnace cushion block integrates materials with different characteristics into a whole through a composite insert casting technology, so that the cushion block has the advantages of wear resistance, heat resistance, no black mark, high quality, low relative cost and the like, can be widely used in a push type heating furnace and a stepping type heating furnace under various temperature section conditions, and can improve the heating quality of heating furnace billets.
Description
Technical Field
The invention relates to a heating furnace cushion block in the metallurgical industry furnace technology, in particular to a heating furnace cushion block manufactured by a composite cast-in manufacturing method.
Background
The cushion blocks or sliding blocks (hereinafter referred to as cushion blocks) for the heating furnace are members which are arranged on the inner support water beam of the heating furnace at intervals in a furnace kiln in the metallurgical industry and are used for supporting steel billets, and the key components are used for connecting the support water beam and a workpiece (steel billet) to be heated in the process of heating the steel billets and ensuring the heating quality of the steel billets. The height of the cushion block has great influence on the quality of the heated billet, the higher the height of the cushion block is, the better the heating effect is, however, the improvement of the height not only increases the manufacturing cost of the cushion block, but also increases the temperature of the upper part of the cushion block, and the indexes of high-temperature wear resistance and toughness of the cushion block are reduced; if the height of the cushion block is lower, the temperature of the upper part of the cushion block is also reduced due to the cooling of the supporting water beam, the local heat loss of the steel billet contacted with the top of the cushion block is large, and a low-temperature zone (called black mark for short) is formed on the steel billet, so that the quality of the finished steel billet is influenced, and the subsequent steel rolling is adversely affected.
In order to improve the high-temperature performance of the cushion block, the traditional technology generally adopts a measure of improving the alloy content grade of the cushion block; in order to reduce the black mark of the billet, measures such as enlarging the interval of cushion blocks, using double rows or multiple rows of cushion blocks to be distributed in a staggered way and the like are generally adopted; in another prior art, a soaking hole is formed at the upper part of the cushion block to reduce the influence of the supporting water beam on the upper part of the cushion block, thereby reducing or avoiding the occurrence of black marks on the billet. In addition, in order to reduce the consumption of alloy materials, the conventional cushion block 9 has a slim waist cushion block structure (shown in fig. 13) in addition to a strip-shaped cushion block (shown in fig. 11) and a mushroom-shaped cushion block (shown in fig. 12). The existing cushion block structure or cushion block manufacturing method only shows some effects in the aspect of solving a certain defect of the cushion block, but no cushion block has the characteristics of high-temperature bearing, wear resistance, no black mark, low cost and the like.
In view of the above, the inventor designs a novel composite insert casting heating furnace cushion block based on experience of new material manufacturing technology research for many years and by combining with latest achievements of material subject, and by integrating materials with different use characteristics by using composite casting technology and insert casting technology.
Disclosure of Invention
The invention aims to provide a heating furnace cushion block which can meet different use occasions, has the characteristics of high-temperature bearing capacity, higher wear resistance, relatively low cost and high cost performance, and can improve the heating quality of steel billets.
Another object of the present invention is to provide a heating furnace mat which can prevent black marks from being generated on a billet.
The invention aims to realize the purpose, and the cushion block of the heating furnace is composed of a heat-resistant matrix and a heat-resistant wear-resistant piece; the heat-resistant and wear-resistant piece is coated on the top of the heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the heat-resistant base body.
In a preferred embodiment of the invention, heat insulating supports are provided inside the heat resistant matrix.
In a preferred embodiment of the present invention, the heat-resistant substrate includes a second heat-resistant substrate located at a lower portion of the mat and a first heat-resistant substrate located at an upper portion of the mat, the first heat-resistant substrate having a higher refractory temperature than the second heat-resistant substrate; the heat-resistant and wear-resistant piece is coated and arranged on the top of the first heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed to the top surface of the first heat-resistant base body.
In a preferred embodiment of the present invention, the first heat-resistant matrix and the second heat-resistant matrix are integrally formed by composite casting of a semi-solid metal and a liquid metal.
In a preferred embodiment of the present invention, the heat-resistant and wear-resistant member is insert-cast on the heat-resistant base.
In a preferred embodiment of the present invention, a plurality of heat-resistant and wear-resistant members are disposed on the top of the heat-resistant base, and the plurality of heat-resistant and wear-resistant members are uniformly distributed on the top of the heat-resistant base.
In a preferred embodiment of the present invention, the thermally insulating support is insert-cast in the heat-resistant base.
In a preferred embodiment of the present invention, the alloy content of the first heat-resistant matrix is higher than the alloy content of the second heat-resistant matrix; the material of the first heat-resistant substrate is Co60, Co50, Co40 or Co 20; the second heat-resistant matrix is made of Cr25Ni20Si2, Co20, Co40 or Co 50; the heat-resistant and wear-resistant part is made of metal ceramic materials or non-metal ceramic materials.
In a preferred embodiment of the present invention, the heat insulation support is made of a pressure-resistant, fire-resistant heat insulation material.
The object of the present invention can also be achieved by a heating furnace mat, which is composed of a heat-resistant base body and a heat-insulating support; the insulating support is disposed inside the heat-resistant base.
In a preferred embodiment of the invention, a heat-resistant wear-resistant part is also arranged on the top of the heat-resistant base body; the heat-resistant and wear-resistant piece is coated on the top of the heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the heat-resistant base body.
In a preferred embodiment of the present invention, the heat-resistant base includes a second heat-resistant base located at a lower portion of the mat and a first heat-resistant base located at an upper portion of the mat; the refractory temperature of the first heat-resistant matrix is higher than the refractory temperature of the second heat-resistant matrix; the heat-resistant and wear-resistant piece is coated and arranged on the top of the first heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the first heat-resistant base body.
In a preferred embodiment of the present invention, the first heat-resistant matrix and the second heat-resistant matrix are integrally formed by composite casting of a semi-solid metal and a liquid metal.
In a preferred embodiment of the present invention, the thermally insulating support is insert-cast in the heat-resistant base.
In a preferred embodiment of the present invention, the heat-resistant and wear-resistant member is insert-cast on the heat-resistant base.
In a preferred embodiment of the present invention, a plurality of heat-resistant and wear-resistant members are disposed on the top of the heat-resistant base, and the plurality of heat-resistant and wear-resistant members are uniformly distributed on the top of the heat-resistant base.
In a preferred embodiment of the present invention, the alloy content of the first heat-resistant matrix is higher than the alloy content of the second heat-resistant matrix; the material of the first heat-resistant substrate is Co60, Co50, Co40 or Co 20; the second heat-resistant matrix is made of Cr25Ni20Si2, Co20, Co40 or Co 50; the heat insulation support piece is made of a pressure-resistant fireproof heat insulation material.
In a preferred embodiment of the present invention, the heat-resistant and wear-resistant member is made of a cermet material or a non-cermet material.
In conclusion, due to the application of the measures, the whole heating furnace cushion block (slide block) composite insert casting manufacturing method has the beneficial effects of improving the quality of the heating product, improving the quality of the cushion block, prolonging the service life of the cushion block and reducing the manufacturing cost.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,
FIG. 1A: the invention is a structural schematic diagram of a thin waist-shaped cushion block formed by a single heat-resisting alloy cast-in heat-resisting wear-resisting piece.
FIG. 1B: is a schematic side view of fig. 1A.
FIG. 2A: the invention is a structural schematic diagram of a strip-shaped cushion block formed by a single heat-resisting alloy insert casting heat-resisting wear-resisting piece.
FIG. 2B: the invention is a structural schematic diagram of a mushroom-shaped cushion block formed by a single heat-resisting alloy cast-in heat-resisting wear-resisting piece.
FIG. 3A: the cushion block with mesh structure is adopted for the heat-resistant wear-resistant part.
FIG. 3B: is a side view schematic of fig. 3A.
FIG. 3C: is a schematic top view of fig. 3A.
FIG. 4A: the structure schematic diagram of the strip-shaped cushion blocks which are cast in a spaced distribution mode is adopted for a plurality of heat-resistant and wear-resistant pieces.
FIG. 4B: is a side view schematic of fig. 4A.
FIG. 5A: the mushroom-shaped cushion blocks are embedded and cast at intervals for a plurality of heat-resistant and wear-resistant pieces.
FIG. 5B: is a side view schematic of fig. 5A.
FIG. 6A: the cushion block structure diagram is a cushion block structure diagram for arranging the heat insulation support piece inside the heat-resistant matrix.
FIG. 6B: is a side view schematic of fig. 6A.
FIG. 7A: the invention is a structural schematic diagram of a cushion block formed by embedding and casting a heat-resistant wear-resistant piece and a heat-insulating support piece in a composite heat-resistant alloy.
FIG. 7B: is a side view schematic of fig. 7A.
Fig. 8 a-8 h: is a schematic diagram of the manufacturing process of the cushion block of the heating furnace.
FIG. 9A: the structure of the strip-shaped cushion block formed by casting the heat insulation support piece in a single heat-resisting alloy is schematically shown.
FIG. 9B: is a side view schematic of fig. 9A.
FIG. 9C: the mushroom-shaped spacer block is a schematic structural diagram of the present invention in which the heat insulating support is cast in a single heat-resistant alloy.
FIG. 10A: the structure of the strip-shaped cushion block formed by casting the heat-insulating support piece in the composite heat-resisting alloy is shown schematically.
FIG. 10B: is a side view schematic of fig. 10A.
FIG. 10C: the structure of the mushroom-shaped cushion block formed by casting the heat insulation support piece in the composite heat-resisting alloy is schematically shown.
FIG. 11: is a schematic structural diagram of the prior strip-shaped cushion block.
FIG. 12: is a structural schematic diagram of the prior mushroom-shaped cushion block.
FIG. 13: is a structural schematic diagram of the prior cushion block with a thin waist shape.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
As shown in fig. 1A, fig. 1B, fig. 2A and fig. 2B, the present invention provides a heating furnace mat 100, wherein the heating furnace mat 100 is composed of a heat-resistant substrate 1 and a heat-resistant wear-resistant member 2; the heat and wear resistant member 2 is coated on top of the heat resistant substrate 1, and the top surface 21 of the heat and wear resistant member 2 is exposed on the top surface of the heat resistant substrate 1. In the present embodiment, the heat and wear resistant piece 2 is insert cast on top of the heat resistant base 1, that is: in the manufacturing process, the solid heat and wear resistant piece 2 is placed in the liquid heat and wear resistant alloy, and after cooling, the heat and wear resistant piece 2 and the heat resistant base body 1 are combined into a whole (the specific manufacturing process will be described later). Further, the shape of the pad 100 is a thin waist shape (as shown in fig. 1A and fig. 1B), which can prevent the cast-in heat-resistant wear-resistant part from falling off in use and prevent the stress concentration effect in the casting process. The shape of the spacer 100 may also be bar-shaped (as shown in fig. 2A) or mushroom-shaped (as shown in fig. 2B).
The heating furnace cushion block 100 provided by the invention has the advantages that the heat-resistant wear-resistant piece is cast on the top of the heat-resistant base body in an embedding manner, so that the defect of insufficient wear resistance of high-temperature alloy in the existing cushion block is overcome, and the wear resistance of the heating furnace cushion block is improved by more than 3-10 times on the basis of the prior art.
In the present embodiment, the heat-resistant and wear-resistant member 2 is made of a cermet material or a non-cermet material. As a special example of the embodiment, the pad block can also be made of a heat-resistant and wear-resistant piece made of a whole ceramic material, and the pad block made of the whole heat-resistant and wear-resistant piece has higher heat resistance and wear resistance, but has poor heat resistance to rapid cooling and shock, and is suitable for occasions with very stable environment and low impact. Therefore, the pad block for casting the heat and wear resistant member made of ceramic materials on the top of the heat resistant substrate as shown in fig. 1A-2B can reduce the size of the heat and wear resistant member to save cost, and the reduction of the thickness of the heat and wear resistant member can improve the heat shock resistance.
In this embodiment, the top heat and wear resistant member 2 of the cushion block may be a mesh structure (as shown in fig. 3A to 3C); or a plurality of heat-resistant and wear-resistant pieces are distributed at intervals for insert casting, as shown in fig. 4A, 4B, 5A and 5B, a plurality of heat-resistant and wear-resistant pieces 2 are arranged on the top of the heat-resistant base body 1, and the plurality of heat-resistant and wear-resistant pieces 2 are uniformly distributed on the top of the heat-resistant base body 1. Such structure can reduce the rapid cooling and shock heating of heat-resistant and wear-resistant parts, and mechanical impact effect, and play a role in not reducing impact resistance on the basis of wear resistance.
Further, as shown in fig. 6A and 6B, in the present embodiment, a heat insulating support 3 is further provided inside the heat-resistant base 1. The heat insulation support 3 is also cast-in inside the heat-resistant base body 1; the heat insulating support 3 is disposed at the geometric center of the lower portion of the heat-resistant base 1. In the present embodiment, the heat insulation support 3 is made of a pressure-resistant, fire-resistant and heat-insulating material.
Due to the use of the heat insulation support piece, the use amount of the precious alloy substrate material can be reduced, and the manufacturing cost is reduced; meanwhile, the influence of the supporting water beam on the top of the cushion block is reduced, and the black mark phenomenon is eliminated; and the rigidity of the cushion block is improved to play a supporting role.
As shown in fig. 6A and 6B, the heat insulation support member may have a structure with through holes, and the through holes may be used as fabrication holes of the heat insulation support member during insert casting, so that manufacturability is possible, and the through holes may be filled with a heat-resistant base material to improve overall structural strength.
In the present embodiment, as shown in fig. 5A, 5B, 7A, and 7B, the heat-resistant base 1 includes a second heat-resistant base 11 located in a lower portion of the mat and a first heat-resistant base 12 located in an upper portion of the mat; the refractory temperature of the first heat-resistant substrate 12 is higher than that of the second heat-resistant substrate 11; the first heat-resistant matrix 12 and the second heat-resistant matrix 11 are formed by compositely casting and connecting semisolid metal and liquid metal into a whole. The heat and wear resistant member 2 is clad on top of the first heat resistant substrate 12, and the top surface 21 of the heat and wear resistant member 2 is exposed to the top surface of the first heat resistant substrate 12.
Because the heating furnace cushion block adopts the composite insert casting technology in the manufacturing process, the heat-resistant alloy substrate is manufactured into an upper material composite structure and a lower material composite structure according to the use environment, and the cost of the cushion block can be reduced on the basis of not reducing the use refractoriness; under the condition of unchanged cost, the alloy at the upper part can be selected to have a higher grade, and the effect of improving the performance grade is achieved.
In the present embodiment, the alloy content of the first heat-resistant base 12 is higher than that of the second heat-resistant base 11; the material of the first heat-resisting substrate 12 can be selected from Co60, Co50, Co40 or Co 20; the material of the second heat-resisting substrate 11 is correspondingly selected to have an alloy grade lower than Cr25Ni20Si2, Co20, Co40 or Co50 of the first heat-resisting substrate 12;
the cushion block of the heating furnace is suitable for a push steel type heating furnace and a stepping type heating furnace under the conditions of various temperature sections; the cushion block of the heating furnace integrates materials with different characteristics (including heat resistance, wear resistance, heat insulation, corrosion resistance and the like) by a composite insert casting technology, so that the cushion block has the advantages of wear resistance, heat resistance, no black mark, high quality, low relative cost and the like, and can be widely used for production of the heating furnace.
The mushroom-shaped spacer shown in fig. 5A and 5B is used as an example to describe the manufacturing process of the spacer by insert casting the dual heat-resistant alloy substrate composite, the heat-resistant wear-resistant member and the heat-insulating support member. The manufacturing process comprises the following steps:
1. preparing a casting mold before composite casting:
(1) manufacturing a heat-resistant wear-resistant part 2: customizing a corresponding wear-resistant ceramic prefabricated part according to the specification and the size of a design drawing and the material required by the temperature environment of the use part of the heating furnace (the material can be a metal ceramic or non-metal ceramic high-temperature wear-resistant material meeting the temperature condition, for example, a cushion block used in a high-temperature area, wherein the heat-resistant wear-resistant part 2 adopts a high-temperature-resistant non-metal ceramic high-temperature wear-resistant material, and a cushion block used in a medium-temperature area and a low-temperature area, wherein the heat-resistant wear-resistant part 2 can adopt a;
(2) manufacturing the heat insulation support 3: customizing corresponding heat-insulating refractory support prefabricated parts according to the specification and the size of a design drawing and the material of a heat-insulating support part selected according to the design (the material can be selected from refractory materials with high temperature resistance, heat insulation and higher compressive strength, such as clay, high-alumina, corundum, chromium oxide, zirconium, calcined graphite and the like);
(3) preparation of casting mold 5 (upper box 51, lower box 52): the resin sand precision casting and box separation molding process is adopted, the wear-resistant working surface is positioned on the bottom surface of the lower box, the parting surface is arranged on the interface of the large and small cylindrical casting molds, and the riser is shared by the sprue and is arranged in the center above the upper box;
(4) brushing (or spraying) refractory paint on the inner surface of the sand mold; placing the heat-resistant wear-resistant pieces 2 on the bottom plane of the lower box according to the design arrangement requirement, and bonding and fixing a plurality of heat-resistant wear-resistant pieces by using the paint (as shown in fig. 8a and 8 b);
(5) placing a heat-resistant steel metal support 4 between the heat-resistant wear-resistant member 2 and the heat-insulating support member 3, placing the heat-insulating support member at a position required by the casting mold, and firmly supporting (as shown in fig. 8 c);
(6) the upper box 51 is closed by pressing the upper and lower boxes to ensure the parting surface is sealed without fire running, and the upper and lower casting molds are aligned without wrong boxes (as shown in fig. 8 d);
(7) and (3) casting mold waste heat and drying: and (3) evaporating the water in the casting mold to dryness, and preheating to 150-180 ℃.
2. Smelting of the heat-resistant alloy:
according to the requirements of the use environment on the material of the cushion block, the cushion block is divided into a high-temperature heat-resistant alloy (namely, a first heat-resistant matrix 12) for the upper part and a low-temperature heat-resistant alloy (namely, a second heat-resistant matrix 11) for the lower part, and the two smelting furnaces are respectively used for smelting, so that the requirements are met according to respective chemical components and temperatures;
3. casting the composite cast-in cushion block:
according to the temperature required by the design process, firstly pouring molten metal of a high-temperature heat-resistant alloy 12 into a cavity, enabling the molten metal to enter an inner cavity of a casting mold through a pouring gate and an in-mold channel, preferentially filling a bottom plane distributed with wear-resistant parts, and coating the wear-resistant parts in the heat-resistant alloy until a high-temperature alloy interface and a low-temperature alloy interface (as shown in figure 8 e); when the molten metal of the high-temperature heat-resistant alloy 12 is cooled by a casting mold, a cladding piece and the like to reach a semi-solidification state, quickly replacing the molten metal of the low-temperature heat-resistant alloy 11, pouring the molten metal of the low-temperature heat-resistant alloy 11 according to the process requirement temperature, wherein the molten metal interface of the high-temperature heat-resistant alloy 12 in the semi-solidification state is influenced by the newly added molten metal of the low-temperature heat-resistant alloy 11, so that a little remelting is generated on the interface, and a metallurgical composite layer is formed on the interface together with the molten metal of the; meanwhile, the molten metal of the low-temperature heat-resistant alloy 11 is continuously cast and the heat-insulating support piece 3 is coated in the molten metal until the feeder head is filled, a heat-insulating additive is added above the feeder head, and the casting is finished (as shown in fig. 8 f);
4. heat preservation, unpacking and subsequent treatment:
after casting, naturally cooling the casting in the sand mold 5 until the casting is completely solidified, and opening the box (as shown in fig. 8 g); after the casting is cooled to 450-550 ℃, removing sand molds around the casting by hot unpacking, removing casting and riser heat, and sending to a heat treatment furnace for heat treatment; or naturally cooling to room temperature and carrying out cold-sending heat treatment; after heat treatment the surface is ground clean, inspected, marked (as shown in figure 8 h).
In conclusion, due to the application of the measures, the cushion block of the composite cast-in heating furnace can achieve the beneficial effects of improving the quality of the heating product, improving the quality of the cushion block, prolonging the service life of the cushion block and reducing the manufacturing cost.
As shown in fig. 9A to 9C, the present invention also provides a heating furnace mat 100, wherein the heating furnace mat 100 is composed of a heat-resistant base 1 and a heat-insulating support 3; the insulating support 3 is arranged inside the heat-resistant base 1. In the present embodiment, the thermally insulating support 3 is insert-cast in the heat-resistant base 1, that is: in the manufacturing process, the solid heat insulation support 3 is placed in the liquid heat-resistant alloy, and after cooling, the heat insulation support 3 and the heat-resistant base body 1 are integrated. In the present embodiment, the insulating support 3 is made of a pressure-resistant refractory insulating material; the heat insulating support 3 is disposed at the geometric center of the lower portion of the heat-resistant base 1. Further, the shape of the pad 100 is a strip shape (as shown in fig. 9A), a mushroom shape (as shown in fig. 9C) or a slim waist shape (not shown).
Due to the use of the heat insulation support piece, the use amount of the precious alloy substrate material can be reduced, and the manufacturing cost is reduced; meanwhile, the influence of the supporting water beam on the top of the cushion block is reduced, and the black mark phenomenon is eliminated; and the rigidity of the cushion block is improved to play a supporting role.
Further, as shown in fig. 10A to 10C, in the present embodiment, the heat-resistant base 1 includes a second heat-resistant base 11 located at a lower portion of the mat and a first heat-resistant base 12 located at an upper portion of the mat; the refractory temperature of the first heat-resistant substrate 12 is higher than that of the second heat-resistant substrate 11; the first heat-resistant matrix 12 and the second heat-resistant matrix 11 are formed by compositely casting and connecting semisolid metal and liquid metal into a whole.
Because the heating furnace cushion block adopts the composite insert casting technology in the manufacturing process, the heat-resistant alloy substrate is manufactured into an upper material composite structure and a lower material composite structure according to the use environment, and the cost of the cushion block can be reduced on the basis of not reducing the use refractoriness; under the condition of unchanged cost, the alloy at the upper part can be selected to have a higher grade, and the effect of improving the performance grade is achieved.
In the present embodiment, the alloy content of the first heat-resistant base 12 is higher than that of the second heat-resistant base 11; the material of the first heat-resisting substrate 12 can be selected from Co60, Co50, Co40 or Co 20; the material of the second heat-resisting substrate 11 is correspondingly selected to have an alloy grade lower than Cr25Ni20Si2, Co20, Co40 or Co50 of the first heat-resisting substrate 12;
other structures, processes, and advantageous effects of the present embodiment are the same as those of embodiment 1, and are not described herein again.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (18)
1. The utility model provides a heating furnace cushion which characterized in that: the cushion block of the heating furnace consists of a heat-resistant matrix and a heat-resistant wear-resistant part; the heat-resistant and wear-resistant piece is coated on the top of the heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the heat-resistant base body.
2. The heater mat of claim 1, wherein: and a heat insulation support is arranged inside the heat-resistant matrix.
3. The heater mat of claim 1, wherein: the heat-resistant matrix comprises a second heat-resistant matrix positioned at the lower part of the cushion block and a first heat-resistant matrix positioned at the upper part of the cushion block, and the fire resistance temperature of the first heat-resistant matrix is higher than that of the second heat-resistant matrix; the heat-resistant and wear-resistant piece is coated and arranged on the top of the first heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed to the top surface of the first heat-resistant base body.
4. The heater mat of claim 3, wherein: the first heat-resistant matrix and the second heat-resistant matrix are formed by compositely casting and connecting semi-solid metal and liquid metal into a whole.
5. The heater mat of claim 1, wherein: the heat and wear resistant pieces are insert cast onto the heat resistant substrate.
6. The heater mat of claim 5, wherein: the top of the heat-resistant base body is provided with a plurality of heat-resistant wear-resistant pieces which are uniformly distributed on the top of the heat-resistant base body.
7. The heater mat of claim 2, wherein: the thermally insulating support is insert cast in the heat resistant matrix.
8. The heater mat of claim 3, wherein: the alloy content of the first heat-resistant matrix is higher than that of the second heat-resistant matrix; the material of the first heat-resistant substrate is Co60, Co50, Co40 or Co 20; the second heat-resistant matrix is made of Cr25Ni20Si2, Co20, Co40 or Co 50; the heat-resistant and wear-resistant part is made of metal ceramic materials or non-metal ceramic materials.
9. The heater mat of claim 2, wherein: the heat insulation support piece is made of a pressure-resistant fireproof heat insulation material.
10. The utility model provides a heating furnace cushion which characterized in that: the cushion block of the heating furnace consists of a heat-resistant base body and a heat-insulating support piece; the insulating support is disposed inside the heat-resistant base.
11. The heater mat of claim 10, wherein: the top of the heat-resistant base body is also provided with a heat-resistant wear-resistant part; the heat-resistant and wear-resistant piece is coated on the top of the heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the heat-resistant base body.
12. The heater mat of claim 11, wherein: the heat-resistant matrix comprises a second heat-resistant matrix positioned at the lower part of the cushion block and a first heat-resistant matrix positioned at the upper part of the cushion block; the refractory temperature of the first heat-resistant matrix is higher than the refractory temperature of the second heat-resistant matrix; the heat-resistant and wear-resistant piece is coated and arranged on the top of the first heat-resistant base body, and the top surface of the heat-resistant and wear-resistant piece is exposed on the top surface of the first heat-resistant base body.
13. The heater mat of claim 12, wherein: the first heat-resistant matrix and the second heat-resistant matrix are formed by compositely casting and connecting semi-solid metal and liquid metal into a whole.
14. The heater mat of claim 10, wherein: the thermally insulating support is insert cast in the heat resistant matrix.
15. The heater mat of claim 11, wherein: the heat and wear resistant pieces are insert cast onto the heat resistant substrate.
16. The heater mat of claim 15, wherein: the top of the heat-resistant base body is provided with a plurality of heat-resistant wear-resistant pieces which are uniformly distributed on the top of the heat-resistant base body.
17. The heater mat of claim 12, wherein: the alloy content of the first heat-resistant matrix is higher than that of the second heat-resistant matrix; the material of the first heat-resistant substrate is Co60, Co50, Co40 or Co 20; the second heat-resistant matrix is made of Cr25Ni20Si2, Co20, Co40 or Co 50; the heat insulation support piece is made of a pressure-resistant fireproof heat insulation material.
18. The heater mat of claim 11, wherein: the heat-resistant and wear-resistant part is made of metal ceramic materials or non-metal ceramic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010247099 CN101928822A (en) | 2010-08-06 | 2010-08-06 | Cushion block of heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010247099 CN101928822A (en) | 2010-08-06 | 2010-08-06 | Cushion block of heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101928822A true CN101928822A (en) | 2010-12-29 |
Family
ID=43368250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010247099 Pending CN101928822A (en) | 2010-08-06 | 2010-08-06 | Cushion block of heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101928822A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104599977A (en) * | 2014-12-25 | 2015-05-06 | 杰群电子科技（东莞）有限公司 | Cushion block for semiconductor packaging aluminum wire machine |
| CN107457387A (en) * | 2017-08-04 | 2017-12-12 | 安徽信息工程学院 | A kind of valve rod nut and valve rod nut processing method |
| CN108426455A (en) * | 2018-03-28 | 2018-08-21 | 景德镇陶瓷大学 | A kind of ceramic film support calcining feet and the method for controlling ceramic film support deformation |
| CN111721130A (en) * | 2019-11-15 | 2020-09-29 | 北京科大京都高新技术有限公司 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6123711A (en) * | 1984-07-11 | 1986-02-01 | Daido Steel Co Ltd | Skid button for heating furnace |
| JPS6217118A (en) * | 1985-07-15 | 1987-01-26 | Sumitomo Metal Ind Ltd | Skid button |
| CN1212358A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| CN201787817U (en) * | 2010-08-06 | 2011-04-06 | 中冶京诚工程技术有限公司 | Cushion block of heating furnace |
-
2010
- 2010-08-06 CN CN 201010247099 patent/CN101928822A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6123711A (en) * | 1984-07-11 | 1986-02-01 | Daido Steel Co Ltd | Skid button for heating furnace |
| JPS6217118A (en) * | 1985-07-15 | 1987-01-26 | Sumitomo Metal Ind Ltd | Skid button |
| CN1212358A (en) * | 1997-09-23 | 1999-03-31 | 马燕宁 | Composite heel block for billet heating furnace and its manufacturing technology |
| CN201787817U (en) * | 2010-08-06 | 2011-04-06 | 中冶京诚工程技术有限公司 | Cushion block of heating furnace |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104599977A (en) * | 2014-12-25 | 2015-05-06 | 杰群电子科技（东莞）有限公司 | Cushion block for semiconductor packaging aluminum wire machine |
| CN104599977B (en) * | 2014-12-25 | 2018-02-16 | 杰群电子科技（东莞）有限公司 | A kind of semiconductor packages aluminum steel machine cushion block |
| CN107457387A (en) * | 2017-08-04 | 2017-12-12 | 安徽信息工程学院 | A kind of valve rod nut and valve rod nut processing method |
| CN108426455A (en) * | 2018-03-28 | 2018-08-21 | 景德镇陶瓷大学 | A kind of ceramic film support calcining feet and the method for controlling ceramic film support deformation |
| CN108426455B (en) * | 2018-03-28 | 2023-11-24 | 景德镇陶瓷大学 | Pad foot for ceramic membrane support calcination and method for controlling deformation of ceramic membrane support |
| CN111721130A (en) * | 2019-11-15 | 2020-09-29 | 北京科大京都高新技术有限公司 | Heat-resisting cushion block fixing structure for steel rolling heating furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104439192B (en) | A kind of ceramic honeycomb metallic composite grinding roller of vertical mill preparation method | |
| CN201644776U (en) | Steel ladle lining based on gradient heat insulation | |
| CN101928822A (en) | Cushion block of heating furnace | |
| CN101837432B (en) | Tyre casting method and casting die | |
| CN202571181U (en) | Hollow riser sleeve | |
| CN205996184U (en) | A kind of energy-saving ladle of low-material-consumption | |
| CN103233090B (en) | Dot-matrix type brick inlaid cooling wall and preparation process thereof | |
| CN201787817U (en) | Cushion block of heating furnace | |
| CN102601329B (en) | Novel composite current stabilizer and manufacturing method of the novel composite current stabilizer | |
| CN103157785B (en) | Construction method of ladle lining | |
| CN203256287U (en) | Lattice brick-inserted cooling wall | |
| CN103388055B (en) | Furnace beam and vertical column fire-resistant thermal insulation lining structure of walking beam furnace for heating high-temperature oriented silicon steel and manufacturing method of structure | |
| CN205352077U (en) | Be used for melt -casted heat preservation stove furnace lining structure of aluminium and aluminum alloy | |
| CN205393520U (en) | Light ladle cover | |
| CN201317782Y (en) | Brick-inlaid cooling wall structure of blast furnace | |
| CN209512486U (en) | A kind of new shaft type furnace furnace structure | |
| CN108300850B (en) | Composite steel tapping furnace kang structure for heating furnace and construction method thereof | |
| CN208276131U (en) | A kind of spherical exothermic riser sleeve of mining machinery | |
| CN202804164U (en) | Detachable and replaceable composite steel ladle fabricated part | |
| Zhao et al. | Optimization for the structure of BF hearth bottom and the arrangement of thermal couples | |
| CN217433040U (en) | Sliding plate brick with T-shaped zirconia core | |
| CN214878979U (en) | High normal temperature oxidation resistance and anti-tumor graphite carbon sleeve | |
| CN208183020U (en) | A kind of cellular quenching disk | |
| Slovikovskii | Brickwork of furnace lining of high-temperature metallurgical plants produced from special refractory materials | |
| CN202254838U (en) | Smelting furnace door sill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101229 |