CN113512727A - Heat treatment method of common hard alloy roll collar - Google Patents
Heat treatment method of common hard alloy roll collar Download PDFInfo
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- CN113512727A CN113512727A CN202110419501.3A CN202110419501A CN113512727A CN 113512727 A CN113512727 A CN 113512727A CN 202110419501 A CN202110419501 A CN 202110419501A CN 113512727 A CN113512727 A CN 113512727A
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- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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- 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
- C21D1/26—Methods of annealing
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- 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
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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- 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
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
- C23C8/64—Carburising
- C23C8/66—Carburising of ferrous surfaces
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- 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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- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a heat treatment method for a common hard alloy roll collar, and relates to the technical field of roll collar heat treatment. The method comprises the following processing steps: preparing a carbon black slurry spraying agent; carrying out coarse grinding processing on the roller ring; uniformly spraying the roll collar by using a carbon black slurry spraying device; heating the roll collar; carrying out rapid cooling operation on the roll collar by adopting an air cooling mode; annealing the roll collar, controlling the annealing temperature to 460-500 ℃, controlling the heat preservation time to 4-6 hours, and slowly cooling to room temperature along with the furnace. According to the invention, tungsten dissolved in a hard alloy bonding phase is changed into tungsten carbide in a mode of carrying out carbon black coating on the surface layer of the hard alloy roll collar, tungsten carbide grains are rounded after heat treatment, grain fragmentation in the rolling process is reduced, the steel passing amount is obviously increased, and the problem of roll collar cracking in the low-temperature rolling of the hard alloy roll collar is solved.
Description
Technical Field
The invention relates to the technical field of heat treatment processing of a hard alloy roll collar, in particular to a heat treatment method of a hard alloy roll collar, which ensures that a common hard alloy roll collar meets the low-temperature rolling working condition and can be used for steel rolling production of low-temperature rolled deformed steel.
Background
With the increasing demand of screw-thread steel along with the increasing of infrastructure and real estate markets, the hard alloy roll collar is the most critical part and consumable material in the high-speed rolling screw-thread steel complete equipment, and the hard alloy roll collar directly influences the production efficiency, the production cost and the rolled material quality. In recent years, a steel rolling mill increases the rolling speed by increasing the rolling temperature of deformed steel bars and softening rolled materials; and then a large amount of martensite structures are generated through a strong water-through cooling system to improve the strength of the steel bar, thereby meeting the requirement of national standard strength. However, the forced water penetration process causes the generation of a closed-loop martensite structure, the heat stability of the martensite structure is insufficient, the welding performance of the steel bar is influenced, the elongation of the steel bar is greatly reduced, and the steel bar has a fracture risk in the use process. In order to avoid the heavy use of the strong water-through steel bars, 11 months and 1 day in 2018, the new national standard GB/T1499.2-2018, the second part of the steel for reinforced concrete: the hot-rolled ribbed steel bar is formally implemented, wherein the most important change is that the microstructure of the section of the steel bar needs to be detected, and the closed-loop martensite structure is not allowed to be generated, so that the method for obtaining the high-strength steel bar by the strong through-water cooling cannot be adopted.
In order to meet the requirements of new national standards and reduce the use amount of alloy elements to reduce the cost, the most feasible method is low-temperature rolling. Low-temperature rolling principle: namely, the screw-thread steel is rolled at the recrystallization temperature, so that the growth of rolling deformation refined crystal grains is avoided, and the mechanical property of the screw-thread steel is improved. However, in the low-temperature rolling, the deformation resistance of the steel bar is obviously increased, so that the roll collar is cracked, the rolls are crushed, production safety accidents of a steel rolling mill are caused, the production efficiency is influenced, and the rolling cost of the deformed steel bar is obviously increased.
At present, the prior cemented carbide roll collar has the following technical problems during low-temperature rolling: 1. the hard alloy roll collar is easy to crack during low-temperature rolling, a very suitable hard alloy roll collar suitable for low-temperature rolling is not developed in the existing market, and the common method is to select the hard alloy roll collar with higher bonding phase content to avoid the roll collar from being cracked; 2. the excessive steel amount of the hard alloy roll collar is sharply reduced, the excessive steel amount is reduced to 800 tons per groove from 1500 tons per groove of non-low-temperature rolling, and how to improve the excessive steel amount becomes a new problem to be faced in practical production.
Disclosure of Invention
The invention aims to solve the problems, and provides a heat treatment method for a common hard alloy roll collar, which obviously increases the steel passing amount by performing a carbon-containing coating on the surface layer of the hard alloy roll collar, wherein the steel passing amount can be increased to more than 1200 tons, the operation of uniformly spraying carbon black slurry on the inner surface of the hard alloy roll collar can be performed, and the cracking problem of the low-temperature rolling of the hard alloy roll collar can be solved.
In order to realize the purpose, the invention adopts the technical scheme that: a heat treatment method for a common hard alloy roll collar comprises the following treatment steps:
step A: preparing a carbon black slurry spraying agent;
and B: carrying out coarse grinding on the roll collar, and reserving machining allowance of 0.5-1mm for the inner diameter, the outer diameter, the rolling groove and the section of the roll collar;
and C: uniformly spraying the roll collar by using a carbon black slurry spraying device, wherein the spraying thickness of the carbon black slurry is controlled to be 8-10 mm;
step D: heating the roll collar at 1250-1300 ℃ for 1-3 hours;
step E: carrying out rapid cooling operation on the roll collar by adopting an air cooling mode;
step F: annealing the roll collar, controlling the annealing temperature to 460-500 ℃, controlling the heat preservation time to 4-6 hours, and slowly cooling to room temperature along with the furnace.
As a further optimization of the invention, in the step A, the carbon black slurry spraying agent is prepared by mixing carbon black, polyethylene glycol and polysorbate with distilled water and grinding into slurry.
As a further optimization of the invention, the carbon black slurry spraying device for uniformly spraying the roll collars comprises a case part, an inner surface spraying part for spraying carbon black slurry on the inner walls of the roll collars is arranged in the case part, the inner surface spraying part comprises a clamping cylinder body, a plurality of through holes are radially arranged on the clamping cylinder body, the clamping cylinder body clamps a plurality of roll collars through an end cover part and a clamping piece part, the upper end part of the clamping cylinder body is connected with a material pipe, the material pipe is connected with a first material inlet pipe through a rotary joint, the lower part of the clamping cylinder body is connected with the output end of a first motor through a lower connecting part, the side part of the clamping cylinder body is provided with an outer surface spraying part for spraying carbon black slurry on the outer parts of the roll collars, the outer surface spraying part comprises a rotatably arranged lead screw, a lead screw nut is arranged on the lead screw in a matching way, a connecting frame is arranged on the lead screw nut facing the side part, and a rotary spray nozzle is arranged on the connecting frame facing the side part of the clamping cylinder body, the rotary spray head is connected with the second feeding pipe through a hose.
As a further optimization of the invention, the upper end part of the screw rod is connected with the output end of the second motor, and the guide rod in the case part penetrates through the guide block on the connecting frame.
As a further optimization of the invention, a second control valve is arranged on the second feeding pipe, and the second feeding pipe is externally connected with a pressure output source of the carbon black slurry.
As a further optimization of the invention, the end cover part is fixed on the outer wall of the end part of the clamping cylinder body through a second bolt.
As a further optimization of the invention, a plurality of round holes are arranged on the clamping piece part in an annular array.
As a further optimization of the invention, the upper part of the clamping cylinder is connected with the upper connecting pipe through a third bolt, the material pipe is arranged in the upper connecting pipe, the material pipe is provided with a first control valve, and the first material pipe is externally connected with a carbon black slurry pressure output source.
As a further optimization of the invention, the lower part of the clamping cylinder is connected with the lower connecting part through the first bolt, the upper end of the lower connecting part is in a cylindrical hollow cylinder shape, and the lower connecting part is provided with a discharge hole.
As a further optimization of the invention, a movable door is hinged on the outer wall of the side part of the case part.
The invention has the beneficial effects that: the invention provides a heat treatment method for a common hard alloy roll collar, which can remarkably increase the steel passing amount by performing a carbon-containing coating on the surface layer of the hard alloy roll collar, can increase the steel passing amount to more than 1200 tons, can uniformly spray carbon black slurry on the inner surface of the hard alloy roll collar, and can solve the cracking problem of low-temperature rolling of the hard alloy roll collar.
1. The invention is provided with a carbon black slurry spraying agent, the carbon black slurry spraying agent is firstly sprayed, then the roll collar is heated, the heating temperature is controlled to 1250-, the impact toughness and the fracture toughness of the roll collar are greatly improved, the condition of low-temperature roll cracking is improved, the impact toughness of the roll collar is improved by over 50 percent, and the temperature for finish rolling can be reduced from about 950 ℃ to about 850 ℃ in the actual steel rolling production without reducing the steel excess.
2. The roller ring heat treatment device is provided with an inner surface spraying part and a clamping cylinder body, a first motor is driven, the clamping cylinder body drives a roller ring to rotate, a carbon black slurry coating agent injected from a first feeding pipe is sprayed from a through hole of the clamping cylinder body, and the carbon black slurry coating agent is uniformly sprayed on the inner surface of the roller ring under the double actions of rotating centrifugation and pressurized spraying, so that the roller ring heat treatment device is prepared for a subsequent heat treatment processing process of the roller ring.
3. The carbon black slurry coating agent sprayed out of the rotary spray head uniformly coats the outer surface of the roll ring.
4. Compared with the traditional process for directly carrying out heat treatment on the hard alloy roller, the process has the advantages that the hard alloy components on the surface layer of the roller ring are adjusted, the content of tungsten carbide is increased, the content of tungsten dissolved in a bonding phase is reduced, the toughness of the bonding phase is improved, the steel passing amount and the impact toughness of the surface layer are improved, the carburized surface layer and the carburized inner part form gradient hard alloy, the surface layer has higher carbon content and lower liquidus of the surface layer because of being higher than that of the inner layer, the dissolution precipitation effect of tungsten carbide is more easily generated, the carburized surface layer has more round tungsten carbide grains and coarser tungsten carbide grains, the impact toughness is obviously improved, and the influence on the inner layer is less; the specific surface area of the outer tungsten carbide phase is smaller, bonding occurs, the tungsten carbide phase flows towards the inside, the hardness of the outer hard alloy is increased, the hardness and the steel passing amount of the outer hard alloy are improved, the toughness of the inside is improved, and the rolling safety and the anti-cracking performance are improved.
Drawings
Fig. 1 is a schematic front view of the present invention.
FIG. 2 is a schematic structural view of the position of the clamping cylinder according to the present invention.
Fig. 3 is a schematic top view of the clip portion of the present invention.
FIG. 4 is a schematic cross-sectional view of the through-hole of the chuck body according to the present invention.
Fig. 5 is a schematic view of the structure of the first motor of the present invention.
FIG. 6 is a schematic view of the structure of the present invention at the position of the rotary nozzle.
The text labels in the figures are represented as: 1. a first motor; 2. an inner surface spraying part; 3. a movable door; 4. a roll collar; 5. a cabinet section; 6. an outer surface spray coating section; 201. a lower connecting portion; 202. a discharge hole; 203. a first bolt; 204. clamping the cylinder; 205. a through hole; 206. a circular hole; 207. a clip part; 208. a second bolt; 209. an end cap portion; 210. a third bolt; 211. a material pipe; 212. a rotary joint; 213. a first control valve; 214. a first feed tube; 215. an upper connecting pipe; 601. a second motor; 602. a screw rod; 603. a connecting frame; 604. a guide bar; 605. a guide block; 606. a feed screw nut; 607. rotating the spray head; 608. a hose; 609. a second control valve; 610. a second feed tube.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
As shown in fig. 1 to 6, the specific structure of the present invention is: a heat treatment method for a common hard alloy roll collar, which meets the requirement of low-temperature rolling working condition, comprises the following treatment steps:
step A: preparing a carbon black slurry spraying agent;
and B: carrying out coarse grinding on the roll collar, and reserving machining allowance of 0.5-1mm for the inner diameter, the outer diameter, the rolling groove and the section of the roll collar;
and C: uniformly spraying the roll collar by using a carbon black slurry spraying device, wherein the spraying thickness of the carbon black slurry is controlled to be 8-10 mm;
step D: the roll collar is heated, the heating temperature is controlled to 1250-;
step E: the roll collar is rapidly cooled in an air cooling mode, so that tungsten partially dissolved in the bonding phase is not precipitated but remains in the bonding phase, the solid solution strengthening effect of the bonding phase is achieved, and the excessive steel amount is increased;
step F: annealing the roll collar, controlling the annealing temperature to 460-500 ℃, controlling the heat preservation time to 4-6 hours, and slowly cooling to room temperature along with the furnace.
Preferably, in the step a, the carbon black slurry spraying agent is prepared by mixing carbon black, polyethylene glycol and polysorbate with distilled water and grinding into slurry.
Preferably, the carbon black slurry spraying device for uniformly spraying the roll collars comprises a case part 5, an inner surface spraying part 2 for spraying carbon black slurry on the inner walls of the roll collars 4 is arranged in the case part 5, the inner surface spraying part 2 comprises a clamping cylinder 204, a plurality of through holes 205 are radially arranged on the clamping cylinder 204, the clamping cylinder 204 clamps the roll collars 4 through an end cover part 209 and a clamping part 207, the upper end part of the clamping cylinder 204 is connected with a material pipe 211, the material pipe 211 is connected with a first material pipe 214 through a rotary joint 212, the lower part of the clamping cylinder 204 is connected with the output end of the first motor 1 through a lower connecting part 201, the side part of the clamping cylinder 204 is provided with an outer surface spraying part 6 for spraying carbon black slurry on the outer surfaces of the roll collars 4, the outer surface spraying part 6 comprises a rotatably arranged lead screw 602, a lead screw nut 606 is arranged on the lead screw 602 in a matching manner, and a connecting frame 603 is arranged on the lead screw nut 606 facing the side part, the connecting frame 603 is provided with a rotary spray head 607 facing the side of the clamping cylinder 204, the rotary spray head 607 is connected with a second feed pipe 610 through a hose 608 to drive the first motor 1, the clamping cylinder 204 drives the roller ring 4 to make rotary motion, the carbon black slurry coating agent injected from the position of the first feed pipe 214 is sprayed out from the position of the through hole 205 of the clamping cylinder 204 and uniformly sprayed on the inner surface of the roller ring 4 to prepare for the subsequent heat treatment processing technology of the roller ring 4, the second motor 601 is driven, the screw rod 602 makes rotary motion, the screw nut 606 drives the connecting frame 603 and the rotary spray head 607 to make linear reciprocating motion in the vertical direction, and the carbon black slurry coating agent sprayed from the position of the rotary spray head 607 uniformly coats the outer surface of the roller ring 4.
Preferably, in order to facilitate the screw nut 606 to drive the connecting frame 603 and the rotary nozzle 607 to perform a linear reciprocating motion in the vertical direction, the upper end of the screw 602 is connected to the output end of the second motor 601, and the guide rod 604 in the case part 5 passes through the guide block 605 on the connecting frame 603.
Preferably, in order to facilitate the application of the carbon black slurry coating agent sprayed from the position of the rotating nozzle 607 to the outer surface of the roller ring 4 uniformly, the second feeding pipe 610 is provided with a second control valve 609, the second feeding pipe 610 is externally connected with a carbon black slurry pressure output source, and the mixed and configured carbon black slurry is pressurized and conveyed to the position of the second feeding pipe 610 under the action of a pressure pump.
Preferably, in order to facilitate clamping and fixing the roller ring 4 on the clamping cylinder 204, the end cover portion 209 is fixed on the outer wall of the end portion of the clamping cylinder 204 through the second bolt 208, so that the clamping is convenient and the operation is simple.
Preferably, in order to facilitate the flowing of the carbon black slurry between the roller ring 4 and the clamping cylinder 204 and avoid the uneven spraying caused by the overstock of the carbon black slurry, a plurality of circular holes 206 are arranged in the clamping piece portion 207 in an annular array, and the redundant carbon black slurry after being coated is discharged downwards from the positions of the circular holes 206.
Preferably, in order to facilitate the carbon black slurry to be sprayed on the inner wall of the roller ring 4, the upper portion of the clamping cylinder 204 is connected with the upper connecting pipe 215 through the third bolt 210, the material pipe 211 is disposed in the upper connecting pipe 215, the first material pipe 214 is provided with the first control valve 213, the first material pipe 214 is externally connected with a carbon black slurry pressure output source, and the mixed carbon black slurry is pressurized and conveyed to the position of the first material pipe 214 under the action of the pressure pump.
Preferably, in order to facilitate the discharge of the excess carbon black slurry from the clamping cylinder 204 and avoid the accumulation of the carbon black slurry, the lower part of the clamping cylinder 204 is connected with the lower connecting portion 201 through the first bolt 203, the upper end of the lower connecting portion 201 is cylindrical and hollow, and the lower connecting portion 201 is provided with a discharge hole 202.
Preferably, in order to facilitate the convenience of installation, debugging and maintenance operations of the components in the cabinet part 5, the outer wall of the side part of the cabinet part 5 is hinged with the movable door 3.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (10)
1. A heat treatment method for a common hard alloy roll collar is characterized by comprising the following treatment steps:
step A: preparing a carbon black slurry spraying agent;
and B: carrying out coarse grinding on the roll collar, and reserving machining allowance of 0.5-1mm for the inner diameter, the outer diameter, the rolling groove and the section of the roll collar;
and C: uniformly spraying the roll collar by using a carbon black slurry spraying device, wherein the spraying thickness of the carbon black slurry is controlled to be 0.5-2 mm;
step D: heating the roll collar at 1250-1300 ℃ for 1-3 hours;
step E: carrying out rapid cooling operation on the roll collar by adopting an air cooling mode;
step F: annealing the roll collar, controlling the annealing temperature to 460-500 ℃, controlling the heat preservation time to 4-6 hours, and slowly cooling to room temperature along with the furnace.
2. The heat treatment method for the common hard alloy roll collar as claimed in claim 1, wherein in the step A, the carbon black slurry spraying agent is prepared by grinding carbon black, polyethylene glycol and polysorbate into slurry with distilled water.
3. A carbon black slurry spraying device for uniformly spraying the roll rings in the method as claimed in claim 1, wherein the spraying device comprises a case part (5), an inner surface spraying part (2) for spraying carbon black slurry on the outer walls of the roll rings (4) is arranged in the case part (5), the inner surface spraying part (2) comprises a clamping cylinder body (204), a plurality of through holes (205) are radially arranged on the clamping cylinder body (204), the clamping cylinder body (204) clamps a plurality of roll rings (4) through an end cover part (209) and a clamping part (207), the upper end part of the clamping cylinder body (204) is connected with a material pipe (211), the material pipe (211) is connected with a first material inlet pipe (214) through a rotary joint (212), the lower part of the clamping cylinder body (204) is connected with the output end of a first motor (1) through a lower connecting part (201), the side part of the clamping cylinder body (204) is provided with an outer surface spraying part (6) for spraying carbon black slurry on the outer sides of the roll rings (4), the outer surface spraying part (6) comprises a screw rod (602) which is rotatably arranged, a screw nut (606) is arranged on the screw rod (602) in a matched mode, a connecting frame (603) is arranged on the side portion of the screw nut (606) facing the side portion, a rotary spray head (607) is arranged on the side portion of the connecting frame (603) facing the clamping cylinder (204), and the rotary spray head (607) is connected with a second feeding pipe (610) through a hose (608).
4. The carbon black slurry spraying device according to claim 3, wherein the upper end of the screw rod (602) is connected with the output end of the second motor (601), and a guide rod (604) in the case part (5) passes through a guide block (605) on the connecting frame (603).
5. The carbon black slurry spraying device as claimed in claim 3, wherein a second control valve (609) is arranged on the second feeding pipe (610), and the second feeding pipe (610) is externally connected with a pressure output source of the carbon black slurry.
6. The carbon black slurry spraying device as claimed in claim 3, wherein the end cover part (209) is fixed on the outer wall of the end part of the clamping cylinder body (204) through a second bolt (208).
7. A carbon black slurry spraying apparatus according to claim 3, wherein a plurality of circular holes (206) are provided in an annular array on said clip portion (207).
8. The carbon black slurry spraying device according to claim 3, wherein the upper part of the clamping cylinder (204) is connected with an upper connecting pipe (215) through a third bolt (210), the material pipe (211) is arranged in the upper connecting pipe (215), a first control valve (213) is arranged on the first material pipe (214), and the first material pipe (214) is externally connected with a carbon black slurry pressure output source.
9. The carbon black slurry spraying device as claimed in claim 3, wherein the lower part of the clamping cylinder (204) is connected with the lower connecting part (201) through a first bolt (203), the upper end of the lower connecting part (201) is in a cylindrical hollow cylinder shape, and the lower connecting part (201) is provided with a discharge hole (202).
10. A carbon black slurry spraying apparatus according to claim 3, wherein a movable door (3) is hinged to the outer wall of the side portion of the cabinet portion (5).
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| CN202110419501.3A CN113512727B (en) | 2021-04-19 | 2021-04-19 | Heat treatment method for common hard alloy roll collar |
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| CN202110419501.3A CN113512727B (en) | 2021-04-19 | 2021-04-19 | Heat treatment method for common hard alloy roll collar |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724760A (en) * | 2008-10-28 | 2010-06-09 | 犹他大学研究基金会 | Functionally graded cemented carbide with engineered hard surface and the method for making the same |
| CN102002664A (en) * | 2010-11-02 | 2011-04-06 | 中南大学 | Method for preparing gradient structure hard alloy |
| CN102031435A (en) * | 2010-11-02 | 2011-04-27 | 中南大学 | Preparation technology of hard alloy with gradiently-changed cobalt content at surface layer |
| US20180290933A1 (en) * | 2015-01-22 | 2018-10-11 | University Of Utah Research Foundation | Functionally graded carbides |
| CN110076037A (en) * | 2019-03-13 | 2019-08-02 | 福建工程学院 | A kind of efficient spray equipment of engine bearing and method |
| EP3763840A1 (en) * | 2019-07-10 | 2021-01-13 | Sandvik Mining and Construction Tools AB | Gradient cemented carbide body and method of manufacturing thereof |
-
2021
- 2021-04-19 CN CN202110419501.3A patent/CN113512727B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724760A (en) * | 2008-10-28 | 2010-06-09 | 犹他大学研究基金会 | Functionally graded cemented carbide with engineered hard surface and the method for making the same |
| CN102002664A (en) * | 2010-11-02 | 2011-04-06 | 中南大学 | Method for preparing gradient structure hard alloy |
| CN102031435A (en) * | 2010-11-02 | 2011-04-27 | 中南大学 | Preparation technology of hard alloy with gradiently-changed cobalt content at surface layer |
| US20180290933A1 (en) * | 2015-01-22 | 2018-10-11 | University Of Utah Research Foundation | Functionally graded carbides |
| CN110076037A (en) * | 2019-03-13 | 2019-08-02 | 福建工程学院 | A kind of efficient spray equipment of engine bearing and method |
| EP3763840A1 (en) * | 2019-07-10 | 2021-01-13 | Sandvik Mining and Construction Tools AB | Gradient cemented carbide body and method of manufacturing thereof |
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