CN112934383A - Material guiding and feeding component and production process thereof - Google Patents
Material guiding and feeding component and production process thereof Download PDFInfo
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- CN112934383A CN112934383A CN202110226737.5A CN202110226737A CN112934383A CN 112934383 A CN112934383 A CN 112934383A CN 202110226737 A CN202110226737 A CN 202110226737A CN 112934383 A CN112934383 A CN 112934383A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims description 51
- 230000007423 decrease Effects 0.000 claims abstract 2
- 238000005260 corrosion Methods 0.000 claims description 49
- 239000011651 chromium Substances 0.000 claims description 19
- 229910001018 Cast iron Inorganic materials 0.000 claims description 15
- 229910052804 chromium Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 10
- 230000000171 quenching effect Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000005496 tempering Methods 0.000 claims description 8
- 238000005299 abrasion Methods 0.000 claims description 7
- 239000002918 waste heat Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 244000035744 Hura crepitans Species 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000010114 lost-foam casting Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 239000000243 solution Substances 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 15
- 229910052729 chemical element Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910000851 Alloy steel Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
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- 238000007599 discharging Methods 0.000 description 2
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- 239000011159 matrix material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005088 metallography Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000011733 molybdenum Substances 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
- B22D19/085—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal of anti-frictional metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
- C22C37/08—Cast-iron alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
Abstract
The application relates to rod mill accessory technical field, especially relate to a guide pan feeding component and production technology of guide pan feeding component, guide pan feeding component includes: the shell, the inside cavity of shell, and the shell is formed with discharge gate and two at least pan feeding mouths that are linked together rather than inside cavity department, and the inner wall of shell is provided with and is used for wearing and decreases and anticorrosive wear-resistant coating. Based on the structure of above description, the shell is responsible for structural strength and is connected with relevant equipment, and anticorrosive wearing layer then is responsible for resisting strong wearing and tearing and corruption, accomplishes the performance complementation, and the performance advantage separately plays, collaborative work for this guide pan feeding component's life is longer, and then need not often to stop production, weld repair, overhaul, thereby helps improving production efficiency.
Description
Technical Field
The application relates to the technical field of rod mill accessories, in particular to a material guide feeding component and a production process of the material guide feeding component.
Background
At present, a feeding port of a raw material crushing device for mining industry is used for conveying a mixture of aluminum ore, water and sodium hydroxide, namely, the feeding port is in a wet grinding working condition, and specifically, the wet grinding working condition is as follows: the granularity of the aluminum ore is 20-40mm, the hardness is Mohs > 6 grade, which is equivalent to HV1050, and the PH value of the sodium hydroxide is added into the water according to the proportion of 10-12. In the prior art, the alloy steel single-metal feeding port is prepared by sand casting molding, so that the alloy steel single-metal feeding port is easy to wear and corrode and short in service life, and a user has to stop production, repair welding and overhaul, so that the production is influenced.
Disclosure of Invention
An object of this application is to provide a production technology of guide pan feeding component and guide pan feeding component, has solved the easy wearing and tearing of alloy steel single metal's that exists among the prior art pan feeding mouth to a certain extent, corrodes, and life is short, influences the technical problem of production.
The application provides a guide pan feeding component, which comprises an outer shell, the inside cavity of shell, just the shell is formed with discharge gate and two at least pan feeding mouths that are linked together rather than inside cavity department, the inner wall of shell is provided with and is used for wear-resistant to lose and anticorrosive wearing layer.
In the above technical solution, further, the plurality of feeding ports at least includes a first feeding port and a second feeding port, wherein the first feeding port is formed at one end of the housing, and the discharging port is formed at the opposite end of the housing;
the second feeding port is formed in one side of the shell and extends towards the direction far away from the shell; the inner wall of the second feeding hole is also provided with the anti-corrosion and anti-wear layer.
In any of the above technical solutions, further, the intersecting portion of the anti-corrosion and anti-wear layer disposed on the inner wall of the second feeding port and the anti-corrosion and anti-wear layer disposed on the inner wall of the housing is lengthened and thickened toward the inside of the housing.
In any of the above technical solutions, further, the corrosion-resistant and wear-resistant layer is formed of high-chromium cast iron.
In any of the above technical solutions, further, the anticorrosion and antiwear layer comprises the following components in percentage by mass: 3-4% of C, 0.8-1.2% of Si, 0.7-1.0% of Mn, 22-26% of Cr, 0.7-1.0% of Mo, 0.6-1.2% of Ni, 0.4-0.6% of Cu, 0.15-0.2% of V, less than 0.06% of P, less than 0.06% of S, 0.05-0.1% of Re and 0.25-0.35% of Ti.
In any of the above solutions, further, the housing is formed of 20# steel.
In any of the above technical solutions, further, the anti-corrosion and anti-wear layer and the housing are integrally formed by a lost foam negative pressure casting process.
In any of the above technical solutions, further, the thickness of the housing is 10 mm; the thickness of the anti-corrosion and anti-wear layer is 30mm-50 mm.
The application also provides a production process of the material guiding and feeding component, which is used for preparing the material guiding and feeding component in any technical scheme, so that the material guiding and feeding component has all beneficial technical effects, and is not repeated herein.
In the above technical solution, further, the production process of the material guiding and feeding member includes the following steps:
manufacturing the shell according to a design drawing;
according to the abrasion rates of different parts of the product, the thickness of the anti-corrosion and anti-wear layer is designed correspondingly and differently;
according to the thickness design of the anti-corrosion and anti-wear layer, the anti-corrosion and anti-wear layer is formed on the inner wall of the shell in a compounding mode by adopting a lost foam casting process;
and carrying out heat treatment of quenching and tempering on the cast material guide feeding member by using waste heat.
In any one of the above technical solutions, further, the heat treatment for quenching and tempering the cast material guiding and feeding member by using the waste heat includes: taking out of a sand box at the temperature of 900-920 ℃, shakeout, air-cooling and quenching simultaneously, and then preserving heat for 3 hours at the temperature of 500-280 ℃.
Compared with the prior art, the beneficial effect of this application is:
the application provides a guide pan feeding component includes shell and anticorrosive wearing layer, and the shell is responsible for structural strength and is connected with relevant equipment, and anticorrosive wearing layer then is responsible for resisting strong wearing and tearing and corruption, accomplishes the performance complementary, and the performance advantage separately plays, collaborative work for the life of this guide pan feeding component is longer, and then need not often to stop production, weld repair, maintenance, thereby helps improving production efficiency.
In the production technology of guide pan feeding component that this application provided, be as an organic whole with anticorrosive wearing layer and shell bimetal melt-casting, difficult separation, bulk strength is high, and in addition, the shell of this guide pan feeding component is responsible for structural strength and is connected with relevant equipment, and the anticorrosive wearing layer of this guide pan feeding component is responsible for resisting strong wearing and tearing and corruption.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a material guiding and feeding member according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a method for manufacturing a material guiding and feeding member according to a second embodiment of the present disclosure.
Reference numerals:
1-shell, 11-first feeding port, 12-second feeding port, 13-discharging port, 2-anticorrosion and antiwear layer, and 3-rod mill end cover.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The material guiding member and the manufacturing process of the material guiding member according to some embodiments of the present application are described below with reference to fig. 1 and 2.
Example one
Referring to fig. 1, an embodiment of the present application provides a material guiding and feeding member, which can be used as a feeding port of a rod mill, but is not limited thereto, and can also be used in other apparatuses;
specifically, the material guiding and feeding member comprises a shell 1, wherein the shell 1 is hollow, a discharge hole 13 and two feeding holes which are communicated with the hollow part of the shell 1 are formed in the shell 1, and the number of the feeding holes is not limited to two, and the feeding holes can be arranged according to actual requirements;
the inner wall of the shell 1 is provided with an anti-corrosion and anti-wear layer 2 for resisting wear and corrosion.
Based on the structure that above describes, shell 1 is responsible for structural strength and is connected with relevant equipment, and anticorrosive wearing layer 2 is responsible for resisting strong wearing and tearing and corruption, accomplishes the performance complementation, and the advantage is exerted separately, and collaborative work for this guide pan feeding component's life is longer, and then need not often to shut down production, weld repair, maintenance, thereby helps improving production efficiency.
In this embodiment, preferably, as shown in fig. 1, the two material inlets are a first material inlet 11 and a second material inlet 12, respectively, wherein the first material inlet 11 is formed at one end of the housing 1, the first material inlet 11 is mainly used for inputting ore and the like, and further, preferably, the first material inlet 11 is in a conical structure and plays a role of guiding material;
the discharge port 13 is formed at the other opposite end of the shell 1, the discharge port 13 extends to the inside of the rod mill end cover 3, and the discharge port 13 is used for inputting a mixed material formed by the ore and sodium hydroxide liquid described below into the rod mill;
the second feeding port 12 is formed at one side of the housing 1, the second feeding port 12 extends towards a direction away from the housing 1, and the second feeding port 12 is mainly used for inputting an alkaline solution such as a sodium hydroxide solution; the inner wall of the second feeding opening 12 is also provided with an anti-corrosion and anti-wear layer 2 to play a role of corrosion prevention, and further, preferably, the second feeding opening 12 is in a straight pipe shape.
In this embodiment, preferably, as shown in fig. 1, the intersection of the anti-corrosion and anti-wear layer 2 disposed on the inner wall of the second feeding port 12 and the anti-corrosion and anti-wear layer 2 disposed on the inner wall of the casing 1 is lengthened and thickened toward the inside of the casing 1.
According to the structure described above, the anti-corrosion wear-resistant layer is thickened and extended forwards in the strong wear area, so that the problem of local premature wear-through is solved, and the service life of the product is further prolonged.
In this embodiment, the housing 1 is preferably formed of 20# steel, ensuring a certain structural strength, capable of being connected with the relevant equipment.
The anti-corrosion and anti-wear layer 2 is made of high-chromium cast iron, plays roles in resisting wear, preventing chemical corrosion and electric corrosion, and specifically comprises the following components in percentage by mass: 3-4% of C, 0.8-1.2% of Si, 0.7-1.0% of Mn, 22-26% of Cr, 0.7-1.0% of Mo, 0.6-1.2% of Ni, 0.4-0.6% of Cu, 0.15-0.2% of V, less than 0.06% of P, less than 0.06% of S, 0.05-0.1% of Re and 0.25-0.35% of Ti.
Based on the components, the proper amount of Cu is added into chemical elements, so that most of the Cu is remained in the intergranular region during crystallization, thereby reducing the generation of a micro battery and reducing intergranular corrosion.
The chemical elements are added with Mo and Ni in proper amount to prevent the corrosion of sodium hydroxide.
V is added into chemical elements in proper amount to generate particles with a metallographic structure Vc and a hardness of HV 2800.
Proper amount of Ti is added into chemical elements to generate a metallographic structure Tic with hardness of HV 3200.
The extremely hard particles account for more than 28 percent of the total volume of the product, are uniformly dispersed in the matrix of the product and are tightly wrapped by high-strength metallographic structure tempered martensite, so that the average hardness of the product is about HV1600, the hardness ratio of aluminum ore to aluminum ore is HV1050, and the hardness ratio of 1600:1050 is 1.5:1, and the hardness ratio of the wear-resistant part to the abrasive particles is completely satisfied (1.4-1.6): 1, or a plurality of data.
Note that the chemical composition of the high-chromium cast iron is a range, and the impact toughness of the product is adjusted to some extent according to the particle size of the ore, and the relative hardness of the product is adjusted to the hardness of the ore. The corrosion resistance of the product is adjusted according to the amount of sodium hydroxide added in the production, and the micro-battery generation resistance of the product is adjusted according to the flow rate of the liquid state condition.
The following is an example of the conditions often encountered in actual production: the particle size of the aluminum ore is 30mm, the Mohs hardness is 6.5 grade, and the PH value is 10, under the working condition, the aluminum ore preferably has the following weight percentage:
the chemical composition of the high-chromium cast iron is as follows: 3.8% of C, 1.1% of Si, 0.9% of Mn, 24% of Cr, 0.9% of Mo, 0.8% of Ni, 0.5% of Cu, 0.16% of V, 0.06% of P, 0.06% of S, 0.07% of Re, and 0.3% of Ti.
On the premise of ensuring wear resistance and corrosion resistance, the noble elements such as molybdenum, vanadium, titanium, copper and the like are small in value and low in cost, the carbon content is large in value, the hardness is enough, the cost cannot be increased, in addition, the carbon content is large, a heating furnace is not needed for heating, a high-temperature box is taken out, air cooling quenching is carried out by utilizing waste heat, the ideal hardness can be obtained, the cost of each ton of products can be reduced by 1000 yuan, and the method has important significance in actual production.
In the embodiment, the anti-corrosion and anti-wear layer 2 and the shell 1 are preferably integrally formed by adopting a lost foam negative pressure casting process, the anti-corrosion and anti-wear layer and the shell are integrally melt-cast, the problem of separation cannot occur, and the integral structure is high in strength and not easy to damage.
In this embodiment, the thickness of the housing 1 is preferably 10mm, which meets the structural strength requirement; the thickness of the anti-corrosion and anti-wear layer 2 is 30mm-50mm, and the requirements of corrosion resistance and wear resistance are met.
In conclusion, a new process of compounding the shell 1 of the 20# steel and the anti-corrosion and anti-wear layer 2 of the high-chromium cast iron is adopted, wherein the shell 1 of the 20# steel is responsible for connecting the structural strength with relevant equipment, and the anti-corrosion and anti-wear layer 2 of the high-chromium cast iron is responsible for resisting strong wear and corrosion, so that the performances are complementary and the advantages are respectively played.
Example two
Embodiments of the present application further provide a production process of a material guiding and feeding member, which is used for preparing the material guiding and feeding member according to any of the above embodiments, so that all beneficial technical effects of the material guiding and feeding member are achieved, and further description is omitted here.
In this embodiment, preferably, as shown in fig. 2, the process for producing the material guiding member includes the following steps:
manufacturing a shell 1 made of 20# steel according to a design drawing;
according to the abrasion rates of different parts of the product, the thickness of the anticorrosive and wear-resistant layer 2 of the high-chromium cast iron is designed correspondingly and differently (preferably, the thickness of the shell 1 is 10mm, and the thickness of the anticorrosive and wear-resistant layer 2 is 30mm-50 mm);
according to the thickness design of the anti-corrosion and anti-wear layer 2, a high-chromium cast iron anti-corrosion and anti-wear layer 2 is formed on the inner wall of the shell 1 by adopting a lost foam casting process in a compounding manner, and the metallographic structure formed after casting is A + B + Si + C (preferably, the casting temperature is 1340-1380 ℃);
and (3) carrying out quenching and tempering heat treatment on the cast material guide feeding member by using waste heat to obtain a final metallographic structure of A + B + Si + T (in the tempering step, the metallographic structure C is converted into the metallographic structure T to obtain an ideal metallographic structure, and the internal stress of the product is eliminated at the same time). Therefore, the waste heat is fully utilized, and the energy is saved.
Further, preferably, the heat treatment for quenching and tempering the cast material guiding and feeding member by using the residual heat comprises: taking out the sand box at the temperature of 900-920 ℃, shakeout, simultaneously carrying out air cooling quenching, then carrying out heat preservation for 3 hours at the temperature of 500-280 ℃, and tempering to convert the metallographic structure C into the metallographic structure D, obtain an ideal metallographic structure and eliminate the internal stress of the product.
In order to clearly understand the superior performance of the material guiding and feeding member prepared by the process, the performance of the alloy steel single metal feeding port produced by using the single metal sand mold casting process in the prior art is compared with the performance of the material guiding and feeding member obtained by using the production process, and the specific reference is shown in table one, table two, table three and table four:
TABLE A two-product chemical composition comparison table
Note that: the chemical element compositions are all expressed in mass percent.
Comparison table for metallographic structures of two products in table II
Representative of the three metallography
In combination with the contents disclosed in the above tables, the material guiding and feeding member prepared by the process has the following characteristics:
the hardness HRC of the material guiding and feeding component is not less than 60, and the tensile strength is not less than 410N/mm2Impact toughness ak/J.cm2Not less than 20, and the abrasion rate is 0.01-0.02g/12hcm2。
The hardness HV of the metallographic structure A of the material guiding and feeding member is 1200-1800 (the hardness is more than HRC 75).
The hardness HV of the metallographic structure B of the material guiding and feeding member is 1200-1600 (the hardness is more than HRC 70).
The proper amount of Cu is added into chemical elements, so that most of the Cu is remained in the intergranular region during crystallization, thereby reducing the generation of a micro battery and reducing intergranular corrosion.
The chemical elements are added with Mo and Ni in proper amount to prevent the corrosion of sodium hydroxide.
V is added into chemical elements in a proper amount to generate particles with pungent metallographic structure and HV of 2800.
A proper amount of Ti is added into the chemical elements to generate a mass point with a metallographic structure of nonane and the hardness of HV 3200.
The extremely hard particles account for more than 28 percent of the total volume of the product, are uniformly dispersed in the product matrix and are tightly wrapped by high-strength metallographic structure D, so that the average hardness of the product is about HV1600, the hardness of the aluminum ore is HV1050, and the hardness ratio of 1600:1050 is 1.5:1, thereby completely meeting the hardness ratio of the wear-resistant part to the abrasive particles (1.4-1.6): 1, or a plurality of data.
The wear resistance of the feeding hole in the prior art is compared with the wear resistance of the high-chromium cast iron anti-corrosion wear-resistant layer of the material guiding and feeding member prepared by the production process, and the details are shown in the table five:
service life calculated by table five
| Product name | 3cm3Heavy load | The abrasion rate is 12h/cm2 | Sky | Year (service life) |
| Alloy steel | 22.5g | ÷0.03g＝750 | 750÷2＝375 | 1.04 years after 360 days |
| Alloy steel | 22.5g | ÷0.07g＝321.4 | 321.428÷2＝160.7 | 0.44 years divided by 360 days |
| High chromium cast iron | 22.5g | ÷0.01g＝2250 | 2250÷2＝1125 | 3.125 years/360 days/min |
| High chromium cast iron | 22.5g | ÷0.02g＝1125 | 1125÷2＝562.5 | 1.56 years divided by 360 days |
Note: the product is designed to run safely, the abrasion thickness is 30mm, and the weight is 22.5g/3cm3. Test methods for abrasion Rate: the abrasive is 80 meshes of carborundum, the impact angle is 20 degrees, the impact speed is 20 m/s, and each 12 hours and cm2The weight loss of (c).
Therefore, the high-chromium cast iron anti-corrosion and anti-wear layer 2 formed by the production process has stronger wear resistance and longer service life, and is obviously higher than a feeding hole in the prior art.
In conclusion, the material guiding and feeding component prepared by the new process of compounding the shell 1 made of the 20# steel and the anti-corrosion and anti-wear layer 2 made of the high-chromium cast iron can meet the liquid conveying working condition of coexistence of strong wear, chemical corrosion and electric corrosion, has longer service life, does not need to be stopped for maintenance, replacement and the like, and further improves the production efficiency. Note that the process is not limited to the bimetallic casting of high-chromium cast iron and 20# steel, but may also be used to cast metals of other materials to produce products with different wear resistance and resistance to corrosion by different chemical media.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The utility model provides a guide pan feeding component, its characterized in that, includes the shell, the inside cavity of shell, just the shell is formed with discharge gate and two at least pan feeding mouths that are linked together rather than inside cavity department, the inner wall of shell is provided with and is used for wearing and decreases and anticorrosive wearing layer.
2. The material guiding inlet member as claimed in claim 1, wherein the plurality of inlets includes at least a first inlet and a second inlet, wherein the first inlet is formed at one end of the housing and the outlet is formed at the opposite end of the housing;
the second feeding port is formed in one side of the shell and extends towards the direction far away from the shell; the inner wall of the second feeding hole is also provided with the anti-corrosion and anti-wear layer.
3. The material guiding and feeding member as claimed in claim 2, wherein the intersecting portion of the anti-corrosion and anti-wear layer disposed on the inner wall of the second feeding port and the anti-corrosion and anti-wear layer disposed on the inner wall of the casing is lengthened and thickened toward the inside of the casing.
4. The material guide feeding member as claimed in claim 1, wherein the anti-corrosion and anti-wear layer is formed of high chromium cast iron.
5. The material guiding and feeding member as claimed in claim 4, wherein the anti-corrosion and anti-wear layer comprises the following components in percentage by mass: 3-4% of C, 0.8-1.2% of Si, 0.7-1.0% of Mn, 22-26% of Cr, 0.7-1.0% of Mo, 0.6-1.2% of Ni, 0.4-0.6% of Cu, 0.15-0.2% of V, less than 0.06% of P, less than 0.06% of S, 0.05-0.1% of Re and 0.25-0.35% of Ti.
6. The material guide feeding member as claimed in claim 4, wherein the housing is formed of 20# steel.
7. The material guiding and feeding member as claimed in any one of claims 1 to 6, wherein the anti-corrosion and anti-wear layer and the shell are integrally formed by a lost foam negative pressure casting process.
8. A material guiding inlet member as claimed in any one of claims 1 to 6, wherein the thickness of the outer shell is 10 mm; the thickness of the anti-corrosion and anti-wear layer is 30mm-50 mm.
9. A material guiding member production process, which is used for preparing the material guiding member as claimed in any one of claims 1 to 8, and comprises the following steps:
manufacturing the shell according to a design drawing;
according to the abrasion rates of different parts of the product, the thickness of the anti-corrosion and anti-wear layer is designed correspondingly and differently;
according to the thickness design of the anti-corrosion and anti-wear layer, the anti-corrosion and anti-wear layer is formed on the inner wall of the shell in a compounding mode by adopting a lost foam casting process;
and carrying out heat treatment of quenching and tempering on the cast material guide feeding member by using waste heat.
10. The material guide feeding member production process according to claim 9, wherein the heat treatment for quenching and tempering the cast material guide feeding member by using the waste heat comprises: taking out of a sand box at the temperature of 900-920 ℃, shakeout, air-cooling and quenching simultaneously, and then preserving heat for 3 hours at the temperature of 500-280 ℃.
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