CN116511423A - Casting process for casting wear-resistant centrifugal cylinder - Google Patents
Casting process for casting wear-resistant centrifugal cylinder Download PDFInfo
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- CN116511423A CN116511423A CN202310460538.XA CN202310460538A CN116511423A CN 116511423 A CN116511423 A CN 116511423A CN 202310460538 A CN202310460538 A CN 202310460538A CN 116511423 A CN116511423 A CN 116511423A
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- 238000005266 casting Methods 0.000 title claims abstract description 108
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 63
- 239000000956 alloy Substances 0.000 claims abstract description 63
- 239000000843 powder Substances 0.000 claims abstract description 54
- 239000000314 lubricant Substances 0.000 claims abstract description 38
- 239000007787 solid Substances 0.000 claims abstract description 37
- 238000003723 Smelting Methods 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 22
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 22
- 230000007797 corrosion Effects 0.000 claims abstract description 18
- 238000005260 corrosion Methods 0.000 claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 13
- 239000003112 inhibitor Substances 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims description 40
- 238000000576 coating method Methods 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000005507 spraying Methods 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 4
- 244000137852 Petrea volubilis Species 0.000 claims description 4
- 229910010038 TiAl Inorganic materials 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- 238000009690 centrifugal atomisation Methods 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000007750 plasma spraying Methods 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- 239000005083 Zinc sulfide Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 3
- 239000011029 spinel Substances 0.000 claims description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 10
- 238000010008 shearing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to the technical field of centrifugal cylinder casting, in particular to a casting process for casting a wear-resistant centrifugal cylinder. The method comprises the following steps: SS001, raw material supply and design, pre-preparing smelting raw materials of the following components: C. si, sn, cu, mn, cr, nb, rare earth elements, solid lubricant powder, graphene, quaternary high-entropy alloy CoCrFeNi powder, copper corrosion inhibitor and iron, wherein the content range of C is 0.1-0.45%, the content range of Si is 1-1.3%, the content range of Sn is 0.04-0.12%, the content range of Cu is 0.2-0.5% and the content range of Mn is 0.7-1%. The beneficial effects of the invention are as follows: according to the invention, on the basis of the traditional centrifugal cylinder casting raw materials, the lubricating elements with the self-lubricating function are added, and during casting, the quaternary high-entropy alloy CoCrFeNi powder is matched with the solid lubricant powder and the graphene, so that the solid lubricant is formed in the centrifugal cylinder during casting of the centrifugal cylinder.
Description
Technical Field
The invention relates to the technical field of centrifugal cylinder casting, in particular to a casting process for casting a wear-resistant centrifugal cylinder.
Background
The centrifugal cylinder is a thin-wall annular porous part, and has the advantages that the centrifugal cylinder is a thin-wall annular porous part, because the use environment is bad, the centrifugal cylinder has special requirements on materials for casting the centrifugal cylinder, not only has higher plasticity and higher strength, but also has higher wear resistance, but the centrifugal cylinder cast by common casting materials is poor in comprehensive mechanical property, poor in plasticity and strength and insufficient in wear resistance, the service life of the centrifugal cylinder cast by the conventional casting materials is 1-2 days at present, the damage forms are mainly abrasion, and the defect forms indicate that the wear resistance of the centrifugal cylinder cast by the common casting materials is insufficient
In the prior art, the patent document with publication number of CN107916375A discloses a casting material for casting a wear-resistant centrifugal cylinder and a casting process thereof, wherein molding sand and core sand are used as molding materials to prepare a casting mold, and before the casting mold is prepared, the molding sand in the molding material is placed in a baking oven to be dried, the service life of the centrifugal cylinder prepared by the process is prolonged from 1-2 days to 4-5 days, the centrifugal cylinder not only meets the technical requirements on plasticity and strength, but also greatly improves the wear resistance of the centrifugal cylinder, thereby improving the comprehensive mechanical property of the centrifugal cylinder and prolonging the service life of the centrifugal cylinder, but the centrifugal cylinder lacks a self-lubricating effect when in use, so that the degree of improvement on the wear resistance of the centrifugal cylinder is limited.
Disclosure of Invention
The invention provides a casting process for casting a wear-resistant centrifugal cylinder aiming at the technical problems in the prior art, and solves the problem that the centrifugal cylinder cast by the prior art lacks a self-lubricating effect when in use, so that the wear resistance of the centrifugal cylinder is limited.
The technical scheme for solving the technical problems is as follows: a casting process for casting a wear resistant centrifugal cylinder comprising the steps of:
SS001, raw material supply and design, pre-preparing smelting raw materials of the following components: C. si, sn, cu, mn, cr, nb, rare earth elements, solid lubricant powder, graphene, quaternary high-entropy alloy CoCrFeNi powder, copper corrosion inhibitor and iron;
the content range of C is 0.1% -0.45%, the content range of Si is 1% -1.3%, the content range of Sn is 0.04% -0.12%, the content range of Cu is 0.2% -0.5%, the content range of Mn is 0.7% -1%, the content range of Cr is 2% -3.1%, the content range of Nb is 0.4% -0.6%, the content range of rare earth elements is 0.02% -0.2%, the content range of solid lubricant powder is 0.85% -1.2%, the content range of graphene is 0.6% -2.3%, the content range of quaternary high-entropy alloy CoCrFeNi powder is 2.1% -5.2%, the content range of copper corrosion inhibitor is 0.02% -0.1%, and the balance is iron;
SS002, heating and smelting, namely putting the pre-prepared raw materials in the step SS001 into an intermediate frequency induction furnace, heating and smelting an alkaline furnace lining, adding quicklime to remove slag after the smelting temperature reaches 1600 ℃, inserting pure aluminum to deoxidize, adding ferrotitanium to perform nitrogen fixation treatment after deoxidizing, obtaining alloy liquid after the treatment is finished, and discharging at a set discharging temperature;
SS003, casting, pouring the alloy liquid after discharging from the furnace into a casting ladle containing rare earth magnesium alloy, carrying out modification treatment on the alloy liquid, simultaneously blowing argon into the casting ladle, purifying the alloy liquid, controlling the temperature of the alloy liquid to be 1390-1440 ℃, and casting by adopting a casting process after the alloy liquid is purified to obtain a casting;
SS004, heat treatment, namely, heating to 640-700 ℃ at normal temperature, preserving heat for 50-100 minutes after heating to a set temperature, after preserving heat for a set time, raising the furnace temperature to 655-845 ℃, preserving heat for 50 minutes after raising the furnace temperature to the set temperature, rapidly discharging the furnace within 1 minute after preserving heat, quenching by oil, immediately carrying out tempering and preserving heat at 200-245 ℃ after quenching, and finishing heat treatment after preserving heat for 10 hours;
carrying out SS005 and finish polishing, namely obtaining an original casting after the heat treatment in the step SS004, and carrying out finish polishing on the surface of the casting after the original casting is obtained;
spraying SS006 and an undercoat, spraying an undercoat material on the inner wall of a centrifugal cylinder in an electric arc spraying mode, spraying a coating wire on the inner wall of the centrifugal cylinder, and then coating a layer of colored hole sealing agent on the surface of the coating to obtain an undercoat;
and spraying SS007 and the outer coating, and centrifugally spraying on the outer wall of the bottom coating by a centrifugal atomization plasma spraying machine to obtain the outer coating.
The beneficial effects of the invention are as follows:
according to the invention, on the basis of the traditional centrifugal cylinder casting raw materials, the lubricating elements with the self-lubricating function are added, and during casting, the quaternary high-entropy alloy CoCrFeNi powder is matched with the solid lubricant powder and the graphene, so that the solid lubricant is formed in the centrifugal cylinder during casting of the centrifugal cylinder, and when the centrifugal cylinder is worn, the wear resistance of the centrifugal cylinder is improved in an auxiliary manner by precipitation of the lubricant and increase of the lubricating function, so that the wear rate of the inner wall of the centrifugal cylinder is effectively reduced.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the solid lubricant powder is one or more of molybdenum disulfide, graphite, zinc sulfide and calcium fluoride, the particle size of the solid lubricant powder and the particle size of the quaternary high-entropy alloy CoCrFeNi powder are 10 mu m, and the purity of the solid lubricant powder and the purity of the quaternary high-entropy alloy CoCrFeNi powder are more than or equal to 99%.
Further, the average particle diameter of the graphene in the SS001 step is 0.5 μm to 2. Mu.m. The average number of layers of the graphene is 5-7.
Further, the tapping temperature in the step SS002 is 1460-1490 ℃, the alkaline furnace lining material in the step SS002 is magnesia-alumina spinel or magnesia, the casting process in the step SS003 adopts clay sand molding, and the casting system adopts semi-sealed casting process.
Further, the base coat material is formed by mixing the following coating wires in percentage by mass: 20% -35% of TiAl 3 10-20% Cr 3 C 2 5% -15% of WC, 5% -10% of V, 5% -15% of Mo, 2% -8% of Nb, 10% -20% of Al and the balance of Fe.
Further, the hole sealing agent consists of methyl methacrylate, a curing agent and a colored pigment.
Further, the thickness of the primer layer is 0.3mm to 0.5mm, and the thickness of the overcoat layer is 0.5mm to 0.8mm.
Further, the outer coating is a composite metal carbide wear-resistant coating.
Further, 3000 sand paper is adopted for polishing in the step of SS005 during the fine polishing.
Further, the addition of pure aluminum in the step of SS002 is 0.15-0.25% of the total weight of the smelting alloy liquid, and the addition of ferrotitanium is 0.03-0.9% of the total weight of the smelting alloy liquid.
Drawings
FIG. 1 is a schematic flow diagram of a casting process for casting a wear-resistant centrifugal cylinder of the present invention;
FIG. 2 is a diagram showing the composition ratio of smelting raw materials in a first embodiment of the present invention;
fig. 3 is a diagram showing the composition ratio of smelting raw materials in a second embodiment of the present invention.
In the drawings, the list of components represented by the respective reference numerals is as follows.
Description of the embodiments
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
The present invention provides the following preferred embodiments
Examples
As shown in fig. 1-3, a casting process for casting a wear resistant centrifugal cylinder includes the steps of:
SS001, raw material supply and design, pre-preparing smelting raw materials of the following components: C. si, sn, cu, mn, cr, nb, rare earth elements, solid lubricant powder, graphene, quaternary high-entropy alloy CoCrFeNi powder, copper corrosion inhibitor and iron;
0.1% of C, 1% of Si, 0.04% of Sn, 0.2% of Cu, 0.7% of Mn, 2% of Cr, 0.4% of Nb, 0.02% of rare earth elements, 0.85% of solid lubricant powder, 0.6% of graphene, 2.1% of quaternary high-entropy alloy CoCrFeNi powder, 0.02% of copper corrosion inhibitor and the balance of iron;
the average particle size of the graphene was 0.5 μm. The average layer number of the graphene is 5 layers;
the solid lubricant powder is molybdenum disulfide, the particle sizes of the solid lubricant powder and the quaternary high-entropy alloy CoCrFeNi powder are 10 mu m, and the purities of the solid lubricant powder and the quaternary high-entropy alloy CoCrFeNi powder are more than 99%;
when the raw materials are designed, the shearing strength of Sn is lower, the bonding strength of Sn and other materials is larger than the ultimate shearing strength of Sn, and when Sn rubs with other materials, sn is transferred to the surfaces of other materials to form a transfer film, so that a similar lubricating effect is achieved, and the abrasion rate of the inner wall of the centrifugal cylinder is effectively reduced through the realization of a lubricating function;
when the raw materials are designed, cr plays roles of solid solution strengthening, grain refinement and the like, cr can form carbide, has the strongest affinity with C, can form dispersed hard alloy carbide in a final structure, improves the initial hardness of the centrifugal cylinder, and effectively increases the wear resistance of the centrifugal cylinder;
nb in the centrifugal cylinder can increase the ductility and corrosion resistance of the centrifugal cylinder;
the quaternary high-entropy alloy CoCrFeNi powder is matched with the solid lubricant powder and the graphene, so that a solid lubricant is formed in the centrifugal cylinder during casting of the centrifugal cylinder, meanwhile, the mechanical property of the centrifugal cylinder can be compensated by adding the quaternary high-entropy alloy CoCrFeN, the loss of strength and toughness of the centrifugal cylinder caused by adding the solid lubricant powder is reduced, and the centrifugal cylinder still has good self-lubricating performance in a wide temperature range on the premise of ensuring the excellent mechanical property of the centrifugal cylinder;
when the solid lubricant powder is added, copper is easy to corrode, so that 0.02% of copper corrosion inhibitor is required to be added in order to reduce the corrosion rate of the solid lubricant powder to Cu;
SS002, heating and smelting, namely putting the pre-prepared raw materials in the step SS001 into an intermediate frequency induction furnace, heating and smelting an alkaline furnace lining, adding quicklime to remove slag after the smelting temperature reaches 1600 ℃, inserting pure aluminum to deoxidize, adding ferrotitanium to perform nitrogen fixation treatment after deoxidizing, obtaining alloy liquid after the treatment is finished, and discharging at a set discharging temperature;
the tapping temperature in the step SS002 is 1460 ℃, and the alkaline furnace lining material in the step SS002 is magnesia-alumina spinel;
the addition of pure aluminum in the SS002 step is 0.15 percent of the total weight of the smelting alloy liquid, and the addition of ferrotitanium is 0.03 percent of the total weight of the smelting alloy liquid.
SS003, casting, pouring the alloy liquid after discharging the furnace into a casting ladle containing rare earth magnesium alloy, carrying out modification treatment on the alloy liquid, simultaneously blowing argon into the casting ladle, purifying the alloy liquid, controlling the temperature of the alloy liquid to be 1390 ℃, casting by adopting a casting process after the alloy liquid is purified, and obtaining a casting, wherein the casting process in the step SS003 adopts clay sand molding, and a casting system adopts a semi-sealed casting process;
SS004, heat treatment, namely, feeding the materials into a furnace at normal temperature, heating the materials to 640 ℃, preserving heat for 50 minutes after heating the materials to a set temperature, after preserving heat for a set time, raising the furnace temperature to 655 ℃, preserving heat for 50 minutes after raising the furnace temperature to the set temperature, rapidly discharging the materials from the furnace within 1 minute after preserving heat, quenching the materials by oil, immediately carrying out tempering heat preservation at 200 ℃ after quenching, and finishing heat treatment after preserving heat for 10 hours;
carrying out SS005 and finish polishing, namely obtaining an original casting after the heat treatment in the step of SS004, carrying out finish polishing on the surface of the casting after the original casting is obtained, and adopting 3000 sand paper for polishing in the step of SS 005;
spraying SS006 and an undercoat, spraying an undercoat material on the inner wall of a centrifugal cylinder in an electric arc spraying mode, spraying a coating wire on the inner wall of the centrifugal cylinder, and then coating a layer of colored hole sealing agent on the surface of the coating to obtain an undercoat, wherein the thickness of the undercoat is 0.3mm;
the base coat material is formed by mixing the following coating wires in percentage by mass: 20% TiAl 3 10% Cr 3 C 2 WC 5%, V5%, mo 5%, nb 2%, al 10% and Fe the rest;
the hole sealing agent consists of methyl methacrylate, a curing agent and a colored pigment;
through the arrangement of the colored pigment, a user can quickly detect the abrasion degree of the outer coating;
SS007 and an outer coating are sprayed, and the outer coating is obtained after centrifugal spraying of the outer wall of the bottom coating by a centrifugal atomization plasma spraying machine, wherein the thickness of the outer coating is 0.5mm, and the outer coating is a composite metal carbide wear-resistant coating.
Examples
As shown in fig. 1-3, a casting process for casting a wear resistant centrifugal cylinder includes the steps of:
SS001, raw material supply and design, pre-preparing smelting raw materials of the following components: C. si, sn, cu, mn, cr, nb, rare earth elements, solid lubricant powder, graphene, quaternary high-entropy alloy CoCrFeNi powder, copper corrosion inhibitor and iron;
0.45% of C, 1.3% of Si, 0.12% of Sn, 0.5% of Cu, 1% of Mn, 3.1% of Cr, 0.6% of Nb, 0.2% of rare earth elements, 1.2% of solid lubricant powder, 2.3% of graphene, 5.2% of quaternary high-entropy alloy CoCrFeNi powder, 0.1% of copper corrosion inhibitor and the balance of iron;
the average particle size of the graphene was 0.5 μm. The average layer number of the graphene is 5 layers;
the solid lubricant powder is a mixture of molybdenum disulfide, graphite, zinc sulfide and calcium fluoride, the particle sizes of the solid lubricant powder and the quaternary high-entropy alloy CoCrFeNi powder are 10 mu m, and the purities of the solid lubricant powder and the quaternary high-entropy alloy CoCrFeNi powder are 99%;
when the raw materials are designed, the shearing strength of Sn is lower, the bonding strength of Sn and other materials is larger than the ultimate shearing strength of Sn, and when Sn rubs with other materials, sn is transferred to the surfaces of other materials to form a transfer film, so that a similar lubricating effect is achieved, and the abrasion rate of the inner wall of the centrifugal cylinder is effectively reduced through the realization of a lubricating function;
compared with the first embodiment, the self-lubricating effect of the centrifugal cylinder is effectively improved through the increase of the Sn content;
when the raw material is designed, cr plays roles of solid solution strengthening, grain refinement and the like, cr can form carbide, has the strongest affinity with C, can form dispersed hard alloy carbide in a final structure, improves the initial hardness of the centrifugal cylinder, and effectively increases the wear resistance of the centrifugal cylinder;
compared with the first embodiment, the distribution density and the distribution quantity of carbide of the hard alloy are effectively improved by increasing the Cr content, and the wear resistance of the centrifugal cylinder is further improved in an auxiliary manner;
nb in the centrifugal cylinder can increase the ductility and corrosion resistance of the centrifugal cylinder;
by increasing the Nb content, the ductility and corrosion resistance of the centrifugal cylinder are further improved as compared with the first embodiment;
the quaternary high-entropy alloy CoCrFeNi powder is matched with the solid lubricant powder and the graphene, so that a solid lubricant is formed in the centrifugal cylinder during casting of the centrifugal cylinder, meanwhile, the mechanical property of the centrifugal cylinder can be compensated by adding the quaternary high-entropy alloy CoCrFeN, the loss of strength and toughness of the centrifugal cylinder caused by adding the solid lubricant powder is reduced, and the centrifugal cylinder still has good self-lubricating performance in a wide temperature range on the premise of ensuring the excellent mechanical property of the centrifugal cylinder;
when the solid lubricant powder is added, copper is easy to corrode, so that 0.1% of copper corrosion inhibitor is required to be added in order to reduce the corrosion rate of the solid lubricant powder to Cu;
compared with the first embodiment, the corrosion resistance of copper is effectively improved by increasing the weight percentage of the copper corrosion inhibitor;
SS002, heating and smelting, namely putting the pre-prepared raw materials in the step SS001 into an intermediate frequency induction furnace, heating and smelting an alkaline furnace lining, adding quicklime to remove slag after the smelting temperature reaches 1600 ℃, inserting pure aluminum to deoxidize, adding ferrotitanium to perform nitrogen fixation treatment after deoxidizing, obtaining alloy liquid after the treatment is finished, and discharging at a set discharging temperature;
the tapping temperature in the step SS002 is 1490 ℃, and the alkaline furnace lining material in the step SS002 is magnesia;
compared with the first embodiment, the slag content of the smelting alloy liquid is effectively reduced by improving the tapping temperature in the SS002 step;
the addition of pure aluminum in the SS002 step is 0.25 percent of the total weight of the smelting alloy liquid, and the addition of ferrotitanium is 0.9 percent of the total weight of the smelting alloy liquid.
Compared with the first embodiment, the deoxidization amount and deoxidization strength of the alloy smelting liquid are effectively improved by improving the addition amount of pure aluminum;
compared with the first embodiment, the nitrogen fixation treatment capacity and the nitrogen fixation treatment strength of the alloy smelting liquid are effectively improved by improving the adding amount of the ferrotitanium alloy;
SS003, casting, pouring the alloy liquid after discharging the furnace into a casting ladle containing rare earth magnesium alloy, carrying out modification treatment on the alloy liquid, simultaneously blowing argon into the casting ladle, purifying the alloy liquid, controlling the temperature of the alloy liquid to be 1440 ℃, casting by adopting a casting process after the alloy liquid is purified, and obtaining a casting, wherein the casting process in the step SS003 adopts clay sand molding, and a casting system adopts a semi-sealed casting process;
SS004, heat treatment, namely, feeding the materials into a furnace at normal temperature, heating the materials to 700 ℃, preserving heat for 100 minutes after heating the materials to a set temperature, after preserving heat for a set time, raising the furnace temperature to 845 ℃, preserving heat for 50 minutes after raising the furnace temperature to the set temperature, rapidly discharging the materials within 1 minute after preserving heat, quenching the materials by oil, immediately carrying out tempering heat preservation at 245 ℃ after quenching, and finishing heat treatment after preserving heat for 10 hours;
carrying out SS005 and finish polishing, namely obtaining an original casting after the heat treatment in the step of SS004, carrying out finish polishing on the surface of the casting after the original casting is obtained, and adopting 3000 sand paper for polishing in the step of SS 005;
spraying SS006 and an undercoat, spraying an undercoat material on the inner wall of a centrifugal cylinder in an electric arc spraying mode, spraying a coating wire on the inner wall of the centrifugal cylinder, and then coating a layer of colored hole sealing agent on the surface of the coating to obtain an undercoat, wherein the thickness of the undercoat is 0.5mm;
the base coat material is formed by mixing the following coating wires in percentage by mass: 35% TiAl 3 20% Cr 3 C 2 10% WC, 10% V, 10% Mo, 5% Nb, 12% Al and the balance Fe;
the hole sealing agent consists of methyl methacrylate, a curing agent and a colored pigment;
through the arrangement of the colored pigment, a user can quickly detect the abrasion degree of the outer coating;
SS007 and an outer coating are sprayed, and the outer coating is obtained after centrifugal spraying on the outer wall of the bottom coating by a centrifugal atomization plasma spraying machine, wherein the thickness of the outer coating is 0.8mm, and the outer coating is a composite metal carbide wear-resistant coating.
Compared with the first embodiment, the wear resistance of the centrifugal cylinder is effectively improved through the increase of the thickness of the outer coating layer and the base coating layer;
to sum up: the beneficial effects of the invention are embodied in that
According to the invention, on the basis of the traditional centrifugal cylinder casting raw materials, the lubricating elements with the self-lubricating function are added, and during casting, the quaternary high-entropy alloy CoCrFeNi powder is matched with the solid lubricant powder and the graphene, so that the solid lubricant is formed in the centrifugal cylinder during casting of the centrifugal cylinder.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (10)
1. A casting process for casting a wear resistant centrifugal cylinder, comprising the steps of:
SS001, raw material supply and design, pre-preparing smelting raw materials of the following components: C. si, sn, cu, mn, cr, nb, rare earth elements, solid lubricant powder, graphene, quaternary high-entropy alloy CoCrFeNi powder, copper corrosion inhibitor and iron;
the content range of C is 0.1% -0.45%, the content range of Si is 1% -1.3%, the content range of Sn is 0.04% -0.12%, the content range of Cu is 0.2% -0.5%, the content range of Mn is 0.7% -1%, the content range of Cr is 2% -3.1%, the content range of Nb is 0.4% -0.6%, the content range of rare earth elements is 0.02% -0.2%, the content range of solid lubricant powder is 0.85% -1.2%, the content range of graphene is 0.6% -2.3%, the content range of quaternary high-entropy alloy CoCrFeNi powder is 2.1% -5.2%, the content range of copper corrosion inhibitor is 0.02% -0.1%, and the balance is iron;
SS002, heating and smelting, namely putting the pre-prepared raw materials in the step SS001 into an intermediate frequency induction furnace, heating and smelting an alkaline furnace lining, adding quicklime to remove slag after the smelting temperature reaches 1600 ℃, inserting pure aluminum to deoxidize, adding ferrotitanium to perform nitrogen fixation treatment after deoxidizing, obtaining alloy liquid after the treatment is finished, and discharging at a set discharging temperature;
SS003, casting, pouring the alloy liquid after discharging from the furnace into a casting ladle containing rare earth magnesium alloy, carrying out modification treatment on the alloy liquid, simultaneously blowing argon into the casting ladle, purifying the alloy liquid, controlling the temperature of the alloy liquid to be 1390-1440 ℃, and casting by adopting a casting process after the alloy liquid is purified to obtain a casting;
SS004, heat treatment, namely, heating to 640-700 ℃ at normal temperature, preserving heat for 50-100 minutes after heating to a set temperature, after preserving heat for a set time, raising the furnace temperature to 655-845 ℃, preserving heat for 50 minutes after raising the furnace temperature to the set temperature, rapidly discharging the furnace within 1 minute after preserving heat, quenching by oil, immediately carrying out tempering and preserving heat at 200-245 ℃ after quenching, and finishing heat treatment after preserving heat for 10 hours;
carrying out SS005 and finish polishing, namely obtaining an original casting after the heat treatment in the step SS004, and carrying out finish polishing on the surface of the casting after the original casting is obtained;
spraying SS006 and an undercoat, spraying an undercoat material on the inner wall of a centrifugal cylinder in an electric arc spraying mode, spraying a coating wire on the inner wall of the centrifugal cylinder, and then coating a layer of colored hole sealing agent on the surface of the coating to obtain an undercoat;
and spraying SS007 and the outer coating, and centrifugally spraying on the outer wall of the bottom coating by a centrifugal atomization plasma spraying machine to obtain the outer coating.
2. The casting process for casting a wear-resistant centrifugal cylinder according to claim 1, wherein the solid lubricant powder is one or more of molybdenum disulfide, graphite, zinc sulfide, and calcium fluoride, the particle diameters of the solid lubricant powder and the quaternary high-entropy alloy CoCrFeNi powder are each 10 μm, and the purities of the solid lubricant powder and the quaternary high-entropy alloy CoCrFeNi powder are each 99% or more.
3. The casting process for casting a wear-resistant centrifugal cylinder according to claim 1, wherein the average particle diameter of graphene in the SS001 step is 0.5 μm to 2 μm. The average layer number of the graphene is 5-7.
4. The casting process for casting a wear-resistant centrifugal cylinder according to claim 1, wherein the tapping temperature in the step SS002 is 1460 ℃ -1490 ℃, the basic lining material in the step SS002 is magnesia-alumina spinel or magnesia, the casting process in the step SS003 adopts clay sand molding, and the casting system adopts a semi-sealed casting process.
5. The casting process for casting a wear-resistant centrifugal cylinder according to claim 1, wherein the primer layer material is formed by mixing the following coating wires in percentage by mass: 20% -35% of TiAl 3 10-20% Cr 3 C 2 5% -15% of WC, 5% -10% of V, 5% -15% of Mo, 2% -8% of Nb, 10% -20% of Al and the balance of Fe.
6. The casting process for casting an abrasion resistant centrifugal cylinder according to claim 5, wherein the hole sealing agent is composed of methyl methacrylate, a curing agent and a colored pigment.
7. The casting process for casting a wear resistant centrifugal cylinder according to claim 6, wherein the thickness of said undercoat layer is 0.3mm to 0.5mm, and the thickness of said overcoat layer is 0.5mm to 0.8mm.
8. The casting process for casting a wear resistant centrifugal cylinder according to claim 7, wherein said outer coating is a composite metal carbide wear resistant coating.
9. The casting process for casting a wear-resistant centrifugal cylinder according to claim 1, wherein the step of SS005 is finish-polished by using 3000 sand paper.
10. The casting process for casting a wear-resistant centrifugal cylinder according to claim 1, wherein the addition amount of pure aluminum in the SS002 step is 0.15% -0.25% of the total weight of the molten alloy, and the addition amount of ferrotitanium is 0.03% -0.9% of the total weight of the molten alloy.
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