CN115319097A - Preparation method of roller sleeve and roller sleeve - Google Patents
Preparation method of roller sleeve and roller sleeve Download PDFInfo
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- CN115319097A CN115319097A CN202210883010.9A CN202210883010A CN115319097A CN 115319097 A CN115319097 A CN 115319097A CN 202210883010 A CN202210883010 A CN 202210883010A CN 115319097 A CN115319097 A CN 115319097A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
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- 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
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3046—Co as the principal constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
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- Materials Engineering (AREA)
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- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparation method of a roller sleeve and the roller sleeve, wherein the preparation method of the roller sleeve comprises the following steps: the method comprises the steps of uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, carrying out glue blending and granulation on the mixed material, then carrying out die pressing to obtain a plurality of stud shapes, carrying out presintering degumming, then carrying out vacuum sintering to obtain a plurality of steel-bonded hard alloy studs, welding metal studs at one ends of the plurality of steel-bonded hard alloy studs, respectively inserting the other ends of the plurality of steel-bonded hard alloy studs into arc sand cores for fixation, splicing the plurality of arc sand cores fixed with the steel-bonded hard alloy studs in the circumferential direction of a required roll sleeve to form a prefabricated member, preheating the prefabricated member, pouring metal liquid into the prefabricated member, and carrying out insert casting and composite molding with the steel-bonded hard alloy studs after the metal liquid is condensed to obtain a rough cast nail roll sleeve.
Description
Technical Field
The invention relates to the technical field of roller sleeve preparation, in particular to a roller sleeve and a preparation method thereof.
Background
Along with the rapid development of scientific technology, various production industries all put forward higher requirements on production efficiency, in order to adapt to the trend, the industries such as cement building materials, power plants, mines, sandstone aggregates, machine-made sand, construction wastes and the like also put forward higher requirements on the performance of crushing and extrusion grinding key equipment in the production, the mineral raw materials in the production field have high hardness and large abrasiveness, and the traditional metal wear-resistant product is easy to lose efficacy due to over-rapid wear in the service process and is difficult to meet the requirement of long-time stable work of crushing and extrusion grinding equipment. Therefore, the application provides a preparation method grade of the roller sleeve and the roller sleeve, which realize the advantages of less overlaying welding repair quantity, low repair frequency, high cost performance and long service life of the roller sleeve of the roller press.
Disclosure of Invention
The invention mainly aims to provide a preparation method grade of a roller sleeve and the roller sleeve, which realize the purposes of less overlaying welding repair quantity, low repair frequency, high cost performance and long service life of the roller sleeve of a roller press.
In order to achieve the purpose, the invention provides a preparation method of a roller sleeve, which comprises the following steps:
uniformly mixing titanium carbide powder, manganese powder, prealloyed Fe-Mo powder and graphite powder to obtain a mixed material;
after mixing and granulating the mixed material, molding the mixed material into a plurality of stud shapes, pre-sintering and degumming, and then obtaining a plurality of steel bonded hard alloy studs through vacuum sintering;
welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into the arc sand cores for fixing;
splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated member;
preheating the prefabricated part, pouring molten metal into the prefabricated part, and after the molten metal is condensed, performing insert casting composite molding on the molten metal and the steel bond hard alloy stud to obtain a rough cast nail roller sleeve.
Optionally, the titanium carbide powder, the manganese powder, the prealloyed Fe-Mo powder and the graphite powder are in a mass ratio of: 40-80: 5 to 10:20 to 80:6 to 12; and/or the presence of a gas in the gas,
the metal nails comprise copper plated iron nails; and/or the presence of a gas in the gas,
the molten metal is at least one of high-chromium cast iron, high-manganese steel, low-alloy wear-resistant cast steel and medium-alloy wear-resistant cast steel.
Optionally, the temperature for preheating the prefabricated part is T1, wherein T1 is more than or equal to 100 ℃ and less than or equal to 600 ℃; and/or the presence of a gas in the gas,
the temperature of the metal liquid is T2, wherein T2 is more than or equal to 1380 ℃ and less than or equal to 1430 ℃.
Optionally, the step of preheating the preform, pouring molten metal into the preform, after the molten metal is condensed, performing insert casting composite molding with the steel bond hard alloy stud to obtain a rough cast nail roller shell further includes:
heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 700-800 ℃, and the heating rate is 30-50 ℃/h;
heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1050-1100 ℃, and the heating rate is controlled at 100-150 ℃/h;
and carrying out heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain the pretreated cast nail roller sleeve.
Optionally, the step of performing heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain a pretreated cast nail roller sleeve further includes:
carrying out surfacing treatment on a plurality of first gaps, which are formed by axially extending a plurality of steel bond hard alloy studs along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve, by a surfacing process to form a plurality of transition layers;
performing surfacing treatment on a plurality of first gaps, which are formed by axially extending a plurality of steel bond hard alloy studs along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve, by a surfacing process so as to correspondingly form a plurality of first wear-resistant layers on a plurality of transition layers;
and (3) performing surfacing treatment on a plurality of second gaps arranged at axial intervals of the pretreatment cast nail roller sleeve to form a plurality of second wear-resistant layers.
Optionally, the transition layer is formed by overlaying welding of SL-120 welding wires; and/or the presence of a gas in the gas,
the first wear-resistant layer is formed by overlaying welding through an SL-902-WG welding wire; and/or the presence of a gas in the gas,
the second wear-resistant layer is formed by overlaying welding through VC-143 welding wires.
Optionally, a surfacing path is formed among the plurality of steel bond hard alloy studs, the surfacing path is arranged in a wave shape, the welding path includes a plurality of arc sections, the plurality of arc sections are arranged corresponding to the plurality of steel bond hard alloy studs, and each arc section is at least partially arranged around the corresponding steel bond hard alloy stud;
it is a plurality of to follow through build-up welding technology steel bond carbide stud the setting of extension of preliminary treatment cast nail roller shell circumference and edge a plurality of second gaps that the axial interval of preliminary treatment cast nail roller shell set up carry out the build-up welding and handle to still include after the step of forming a plurality of second wearing layer:
and carrying out surfacing treatment along the surfacing path through a surfacing process to form a plurality of third wear-resistant layers.
Optionally, the third wearing layer is formed by surfacing welding with a ceramic wear-resistant electrode, wherein the ceramic wear-resistant electrode comprises a core wire and a coating, the coating is coated on the outer wall of the core wire, the coating accounts for 0.4-0.5 of the weight coefficient of the total weight of the electrode, and the chemical composition of the core wire is as follows by taking the total weight of the core wire as a reference according to the weight percentage:
C：2.11～3.86％，Cr：7.3～8.9％，Mn：1.12～1.93％，Nb：0.11～0.28％，
Mo：0.32～0.97％，Ti：0.11～0.39％，V：0.12～0.96％，Si：0.22～0.97％，
p:0.01 to 0.03%, S:0.01 to 0.04%, fe:1 to 2.0%, co: the balance;
the coating takes the total weight of the coating as a reference, and comprises the following chemical components in percentage by weight: 18 to 22 percent of marble, 15 to 20 percent of fluorite, 21 to 26 percent of mica and bentonite, 12 to 15 percent of rutile and titanium dioxide, 5 to 8 percent of ferrotitanium, 5 to 8 percent of ferromanganese, 4 to 7 percent of ferrosilicon, 3 to 6 percent of ferrochromium, 1 to 3 percent of nickel and 1 to 3 percent of rare earth oxide.
In order to achieve the above object, the present invention provides a roll shell manufactured by the above method for manufacturing a roll shell, the roll shell comprising:
a base housing, and,
and the steel-bonded hard alloy studs are arranged on the inner side surface of the base sleeve at intervals.
Optionally, the steel bond hard alloy studs are arranged on the inner side surface of the base sleeve in a gradually sparse arrangement from the middle to two ends of the inner side surface of the base sleeve.
The method for preparing the roll sleeve comprises the steps of uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, carrying out glue blending and granulation on the mixed material, then carrying out die pressing to obtain a plurality of stud shapes, presintering for degumming, carrying out vacuum sintering to obtain a plurality of steel-bonded hard alloy studs, welding metal studs at one ends of the plurality of steel-bonded hard alloy studs, respectively inserting the other ends of the plurality of steel-bonded hard alloy studs into arc sand cores for fixing, splicing the plurality of arc sand cores fixed with the steel-bonded hard alloy studs according to the circumferential direction of the roll sleeve to form a prefabricated member, preheating the prefabricated member, pouring metal liquid into the prefabricated member, and carrying out insert casting and composite molding on the metal liquid and the steel-bonded hard alloy studs after condensation to obtain a rough cast nail roll sleeve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of one embodiment of a method for manufacturing a roll shell according to the present invention;
FIG. 2 is an SEM image of a roll cover made according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention. 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 invention.
Along with the rapid development of scientific technology, various production industries all put forward higher requirements on production efficiency, in order to adapt to the trend, the industries such as cement building materials, power plants, mines, sandstone aggregates, machine-made sand, construction wastes and the like also put forward higher requirements on the performance of crushing and extrusion grinding key equipment in the production, the mineral raw materials in the production field have high hardness and large abrasiveness, and the traditional metal wear-resistant product is easy to lose efficacy due to over-rapid wear in the service process and is difficult to meet the requirement of long-time stable work of crushing and extrusion grinding equipment. Therefore, the application provides a preparation method grade of the roller sleeve and the roller sleeve, which realize the advantages of less overlaying repair quantity, low repair frequency, high cost performance and long service life of the roller sleeve of the roller press.
In view of the above, the invention provides a method for preparing a roller sleeve, which realizes the advantages of less roll sleeve overlaying repair amount, low repair frequency, high cost performance and long service life of a roll squeezer.
Referring to fig. 1, the method for manufacturing the roll shell includes the following steps:
step S10, uniformly mixing titanium carbide powder, manganese powder, prealloyed Fe-Mo powder and graphite powder to obtain a mixed material;
specifically, in step S10, the mass ratio of the titanium carbide powder, the manganese powder, the prealloyed Fe-Mo powder, and the graphite powder is: 40-80: 5 to 10:20 to 80: 6-12, so configured, the strength and hardness of the steel bond hard alloy stud prepared subsequently can be improved.
S20, carrying out glue blending granulation on the mixed material, then molding the mixed material into a plurality of stud shapes, presintering and degumming, and then carrying out vacuum sintering to obtain a plurality of steel bond hard alloy studs;
s30, welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into arc sand cores for fixing;
specifically, in step S30, the metal nails include copper-plated iron nails, which are configured to improve the strength of the rough cast nail roller sleeve, but in other embodiments, the metal nails may also include iron nails, copper nails, and the like, which are not limited in this application.
S40, splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated part;
and S50, preheating the prefabricated part, pouring molten metal into the prefabricated part, and after the molten metal is condensed, carrying out insert casting and composite molding on the molten metal and the steel bond hard alloy stud to obtain a rough cast nail roller sleeve.
Specifically, in step S50, the molten metal is at least one of high-chromium cast iron, high-manganese steel, low-alloy wear-resistant cast steel, and medium-alloy wear-resistant cast steel, so as to improve the strength and hardness of the rough nail sleeve.
Further, in the step S50, the preheating temperature of the prefabricated part is T1, wherein T1 is more than or equal to 100 ℃ and less than or equal to 600 ℃, and the arrangement is carried out, so that the prefabricated part is uniformly heated, and the influence on the quality of the rough cast nail roller sleeve caused by overhigh or overlow local temperature is avoided.
Further, in the step S50, the temperature of the molten metal is T2, wherein T2 is greater than or equal to 1380 ℃ and less than or equal to 1430 ℃, so that the fluidity of the molten metal is ensured, and air bubbles in the molten metal can be discharged, so that the quality of the rough cast nail roller sleeve is good.
Further, after the step S50, the method further includes:
s60, heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 700-800 ℃, and the heating rate is 30-50 ℃/h;
s70, heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1050-1100 ℃, and the heating rate is controlled to be 100-150 ℃/h;
s80, performing heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain a pretreated cast nail roller sleeve.
Further, after step S80, the method further includes:
s90, performing surfacing treatment on a plurality of first gaps, which are formed by axially extending a plurality of steel-bonded hard alloy studs along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve, through a surfacing process to form a plurality of transition layers;
specifically, in step S90, the transition layer is formed by overlaying SL-120 welding wires.
S100, performing surfacing treatment on a plurality of first gaps, which are formed by extending a plurality of steel bond hard alloy studs along the axial direction of the pretreatment cast nail roller sleeve and are arranged at intervals along the circumferential direction of the pretreatment cast nail roller sleeve, through a surfacing process so as to form a plurality of first wear-resistant layers on a plurality of transition layers correspondingly;
specifically, in step S100, the first wear-resistant layer is formed by overlaying SL-902-WG welding wire.
S110, surfacing process is conducted on a plurality of steel bond hard alloy studs along the circumferential extension of the pretreatment cast nail roller sleeve and along a plurality of second gaps formed in the axial direction of the pretreatment cast nail roller sleeve at intervals, so that a plurality of second wear-resistant layers are formed.
Specifically, in step S110, the second wear-resistant layer is formed by bead welding with a VC-143 welding wire.
A surfacing path is formed among the steel bond hard alloy studs, the surfacing path is arranged in a wave shape, the welding path comprises a plurality of arc sections, the arc sections are arranged corresponding to the steel bond hard alloy studs, and each arc section is at least partially wound around the corresponding steel bond hard alloy stud;
step S110, performing a surfacing process on a plurality of steel-bonded hard alloy studs along a plurality of second gaps which are circumferentially extended and axially spaced along the pretreated cast nail roller sleeve by a surfacing process to form a plurality of second wear-resistant layers, and then:
and S120, performing surfacing treatment along the surfacing path through a surfacing process to form a plurality of third wear-resistant layers.
Specifically, in step S120, the third wear-resistant layer is formed by surfacing using a ceramic wear-resistant welding rod, wherein the ceramic wear-resistant welding rod includes a core wire and a coating, the coating is coated on the outer wall of the core wire, the coating accounts for 0.4-0.5 of the weight coefficient of the total weight of the welding rod, and the core wire comprises the following chemical components in percentage by weight based on the total weight of the core wire:
C：2.11～3.86％，Cr：7.3～8.9％，Mn：1.12～1.93％，Nb：0.11～0.28％，
mo:0.32 to 0.97%, ti:0.11 to 0.39%, V:0.12 to 0.96%, si:0.22 to 0.97%, P:0.01 to 0.03%, S:0.01 to 0.04%, fe:1 to 2.0%, co: the balance;
the coating takes the total weight of the coating as a reference, and comprises the following chemical components in percentage by weight: 18 to 22 percent of marble, 15 to 20 percent of fluorite, 21 to 26 percent of mica and bentonite, 12 to 15 percent of rutile and titanium dioxide, 5 to 8 percent of ferrotitanium, 5 to 8 percent of ferromanganese, 4 to 7 percent of ferrosilicon, 3 to 6 percent of ferrochromium, 1 to 3 percent of nickel and 1 to 3 percent of rare earth oxide.
The method for preparing the roll sleeve comprises the steps of uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, carrying out glue blending and granulation on the mixed material, then carrying out die pressing to obtain a plurality of stud shapes, presintering for degumming, carrying out vacuum sintering to obtain a plurality of steel-bonded hard alloy studs, welding metal studs at one ends of the plurality of steel-bonded hard alloy studs, respectively inserting the other ends of the plurality of steel-bonded hard alloy studs into arc sand cores for fixing, splicing the plurality of arc sand cores fixed with the steel-bonded hard alloy studs according to the circumferential direction of the roll sleeve to form a prefabricated member, preheating the prefabricated member, pouring metal liquid into the prefabricated member, and carrying out insert casting and composite molding on the metal liquid and the steel-bonded hard alloy studs after condensation to obtain a rough cast nail roll sleeve.
The invention provides a roller sleeve which is prepared by the preparation method and comprises a base sleeve and a plurality of steel bonded hard alloy studs, wherein the plurality of steel bonded hard alloy studs are arranged on the inner side surface of the base sleeve at intervals.
Specifically, arrange in the medial surface of base cover is a plurality of steel knot carbide stud by the middle part to both ends of the medial surface of base cover are the sparse arrangement gradually, so set up, have improved extrusion grinding's effect to a certain extent.
An example of a method of making the sleeve of the present invention is given below:
(1) Uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, wherein the mass ratio of the titanium carbide powder to the manganese powder to the pre-alloyed Fe-Mo powder to the graphite powder is as follows: 40-80: 5 to 10:20 to 80:6 to 12;
(2) The mixed material is molded into a plurality of stud shapes after being subjected to glue blending and granulation, and a plurality of steel bond hard alloy studs are obtained through vacuum sintering after pre-sintering degumming;
(3) Welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into the arc sand cores for fixing, wherein the metal nails comprise copper plated iron nails;
(4) Splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated member;
(5) Preheating the prefabricated part, pouring molten metal into the prefabricated part, after the molten metal is condensed, performing cast-in composite forming with the steel bond hard alloy stud to obtain a rough cast nail roller sleeve, wherein the molten metal is at least one of high-chromium cast iron, high-manganese steel, low-alloy wear-resistant cast steel and medium-alloy wear-resistant cast steel, the preheating temperature of the prefabricated part is T1, T1 is more than or equal to 100 ℃ and less than or equal to 600 ℃, the temperature of the poured molten metal is T2, and T2 is more than or equal to 1380 ℃ and less than or equal to 1430 ℃;
(6) Heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 700-800 ℃, and the heating rate is 30-50 ℃/h;
(7) Heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1050-1100 ℃, and the heating rate is controlled to be 100-150 ℃/h;
(8) Carrying out heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain a pretreated cast nail roller sleeve;
(9) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve by using a surfacing process to form a plurality of transition layers, wherein the transition layers are formed by surfacing welding through SL-120 welding wires;
(10) Carrying out surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and circumferentially arranged at intervals by a surfacing process so as to correspondingly form a plurality of first wear-resistant layers on a plurality of transition layers, wherein the first wear-resistant layers are formed by surfacing welding SL-902-WG welding wires;
(11) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of second gaps which are circumferentially extended and axially arranged along the pretreatment cast nail roller sleeve by a surfacing process to form a plurality of second wear-resistant layers, wherein the second wear-resistant layers are formed by surfacing welding through VC-143 welding wires;
(12) It is a plurality of form the build-up welding route between the steel bond carbide stud, the build-up welding route is the wave setting, the welding route includes a plurality of arc sections, and is a plurality of the arc section corresponds a plurality of the steel bond carbide stud sets up, and each the arc section is at least part around establishing corresponding the steel bond carbide stud sets up, follows through build-up welding technology the build-up welding route is carried out the build-up welding and is handled to form a plurality of third wearing layer, wherein, the third wearing layer carries out build-up welding through ceramic wear-resistant welding rod and forms, wherein, ceramic wear-resistant welding rod includes core and coating, the coating is scribbled in the core outer wall, the coating accounts for the weight coefficient of welding rod total weight and is 0.4 ~ 0.5 to the core total weight is the benchmark, according to weight percent, the chemical composition of core is as follows: c:2.11 to 3.86%, cr:7.3 to 8.9%, mn:1.12 to 1.93%, nb:0.11 to 0.28%, mo:0.32 to 0.97%, ti:0.11 to 0.39%, V:0.12 to 0.96%, si:0.22 to 0.97%, P:0.01 to 0.03%, S:0.01 to 0.04%, fe:1 to 2.0%, co: the balance, the total weight of the coating is taken as a reference, and the coating comprises the following chemical components in percentage by weight: 18 to 22 percent of marble, 15 to 20 percent of fluorite, 21 to 26 percent of mica and bentonite, 12 to 15 percent of rutile and titanium dioxide, 5 to 8 percent of ferrotitanium, 5 to 8 percent of ferromanganese, 4 to 7 percent of ferrosilicon, 3 to 6 percent of ferrochromium, 1 to 3 percent of nickel and 1 to 3 percent of rare earth oxide.
The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, it should be understood that the following examples are merely illustrative of the present invention and are not intended to limit the present invention.
Example 1
(1) Uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, wherein the mass ratio of the titanium carbide powder to the manganese powder to the pre-alloyed Fe-Mo powder to the graphite powder is as follows: 40:5:20:6;
(2) After mixing and granulating the mixed material, molding the mixed material into a plurality of stud shapes, pre-sintering and degumming, and then obtaining a plurality of steel bonded hard alloy studs through vacuum sintering;
(3) Welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into the arc sand cores for fixing, wherein the metal nails comprise copper plated iron nails;
(4) Splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated member;
(5) Preheating the prefabricated part, pouring molten metal into the prefabricated part, after the molten metal is condensed, performing insert casting and composite forming with the steel bond hard alloy stud to obtain a rough cast nail roller sleeve, wherein the molten metal is high-chromium cast iron, the preheating temperature of the prefabricated part is T1, T1 is 100 ℃, the temperature of the poured molten metal is T2, and T2 is 1380 ℃;
(6) Heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 700 ℃, and the heating rate is 30 ℃/h;
(7) Heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1050 ℃, and the heating rate is controlled at 100 ℃/h;
(8) Carrying out heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain a pretreated cast nail roller sleeve;
(9) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve by using a surfacing process to form a plurality of transition layers, wherein the transition layers are formed by surfacing welding through SL-120 welding wires;
(10) Carrying out surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and circumferentially arranged at intervals by a surfacing process so as to correspondingly form a plurality of first wear-resistant layers on a plurality of transition layers, wherein the first wear-resistant layers are formed by surfacing welding SL-902-WG welding wires;
(11) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of second gaps which are circumferentially extended and axially arranged along the pretreatment cast nail roller sleeve by a surfacing process to form a plurality of second wear-resistant layers, wherein the second wear-resistant layers are formed by surfacing welding through VC-143 welding wires;
(12) It is a plurality of form the build-up welding route between the steel bond carbide stud, the build-up welding route is the wave setting, the welding route includes a plurality of arc sections, and is a plurality of the arc section corresponds a plurality of the steel bond carbide stud sets up, and each the arc section is at least part around establishing corresponding the steel bond carbide stud sets up, follows through build-up welding technology the build-up welding route carries out the build-up welding and handles to form a plurality of third wearing layer, wherein, the third wearing layer carries out the build-up welding through ceramic stick-resistant electrode and forms, wherein, ceramic stick-resistant electrode includes core wire and coating, the coating is scribbled in the core wire outer wall, the coating accounts for 0.4 in the weight coefficient of welding rod total weight, uses the core wire total weight as the benchmark, according to weight percent, the chemical composition of core wire is as follows: c:2.11%, cr:7.3%, mn:1.12%, nb:0.11%, mo:0.32%, ti:0.11%, V:0.12%, si:0.22%, P:0.01%, S:0.01%, fe:1%, co: the balance, the total weight of the coating is taken as a reference, and the coating comprises the following chemical components in percentage by weight: 18% of marble, 15% of fluorite, 21% of mica and bentonite, 12% of rutile and titanium dioxide, 5% of ferrotitanium, 5% of ferromanganese, 4% of ferrosilicon, 3% of ferrochrome, 1-3% of nickel and 1% of rare earth oxide.
Example 2
(1) Uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, wherein the mass ratio of the titanium carbide powder to the manganese powder to the pre-alloyed Fe-Mo powder to the graphite powder is as follows: 80:10:80:12;
(2) The mixed material is molded into a plurality of stud shapes after being subjected to glue blending and granulation, and a plurality of steel bond hard alloy studs are obtained through vacuum sintering after pre-sintering degumming;
(3) Welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into the arc sand cores for fixing, wherein the metal nails comprise copper plated iron nails;
(4) Splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated member;
(5) Preheating the prefabricated part, pouring molten metal into the prefabricated part, after the molten metal is condensed, performing insert casting and composite forming with the steel bond hard alloy stud to obtain a rough cast nail roller sleeve, wherein the molten metal is high manganese steel, the preheating temperature of the prefabricated part is T1, T1 is 600 ℃, the temperature of the poured molten metal is T2, and T2 is 1430 ℃;
(6) Heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 00 ℃, and the heating rate is 50 ℃/h;
(7) Heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1100 ℃, and the heating rate is controlled at 150 ℃/h;
(8) Carrying out heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain a pretreated cast nail roller sleeve;
(9) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve by using a surfacing process to form a plurality of transition layers, wherein the transition layers are formed by surfacing welding through SL-120 welding wires;
(10) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve by using a surfacing process so as to correspondingly form a plurality of first wear-resistant layers on a plurality of transition layers, wherein the first wear-resistant layers are formed by surfacing welding through SL-902-WG welding wires;
(11) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of second gaps which are circumferentially extended and axially arranged along the pretreatment cast nail roller sleeve by a surfacing process to form a plurality of second wear-resistant layers, wherein the second wear-resistant layers are formed by surfacing welding through VC-143 welding wires;
(12) It is a plurality of form the build-up welding route between the steel bond carbide stud, the build-up welding route is the wave setting, the welding route includes a plurality of arc sections, and is a plurality of the arc section corresponds a plurality of the steel bond carbide stud sets up, and each the arc section is at least part around establishing corresponding the steel bond carbide stud sets up, follows through build-up welding technology the build-up welding route carries out the build-up welding and handles to form a plurality of third wearing layer, wherein, the third wearing layer carries out the build-up welding through ceramic stick-resistant electrode and forms, wherein, ceramic stick-resistant electrode includes core wire and coating, the coating is scribbled in the core wire outer wall, the coating accounts for 0.5 in the weight coefficient of welding rod total weight, uses the core wire total weight as the benchmark, according to weight percent, the chemical composition of core wire is as follows: c:3.86%, cr:8.9%, mn:1.93%, nb:0.28%, mo:0.97%, ti:0.39%, V:0.96%, si:0.97%, P:0.03%, S:0.04%, fe:2.0%, co: the balance, the total weight of the coating is taken as a reference, and the coating comprises the following chemical components in percentage by weight: 22% of marble, 20% of fluorite, 26% of mica and bentonite, 15% of rutile and titanium dioxide, 8% of ferrotitanium, 8% of ferromanganese, 7% of ferrosilicon, 6% of ferrochrome, 3% of nickel and 3% of rare earth oxide.
Example 3
(1) Uniformly mixing titanium carbide powder, manganese powder, pre-alloyed Fe-Mo powder and graphite powder to obtain a mixed material, wherein the mass ratio of the titanium carbide powder to the manganese powder to the pre-alloyed Fe-Mo powder to the graphite powder is as follows: 60:7.5:50:9;
(2) The mixed material is molded into a plurality of stud shapes after being subjected to glue blending and granulation, and a plurality of steel bond hard alloy studs are obtained through vacuum sintering after pre-sintering degumming;
(3) Welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into the arc sand cores for fixing, wherein the metal nails comprise copper plated iron nails;
(4) Splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated member;
(5) Preheating the prefabricated part, pouring molten metal into the prefabricated part, after the molten metal is condensed, performing insert casting and composite forming with the steel bond hard alloy stud to obtain a rough cast nail roller sleeve, wherein the molten metal is manganese steel, the preheating temperature of the prefabricated part is T1, T1 is 350 ℃, the temperature of the poured molten metal is T2, and T2 is 1405 ℃;
(6) Heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 750 ℃, and the heating rate is 40 ℃/h;
(7) Heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1075 ℃, and the heating rate is controlled at 125 ℃/h;
(8) Carrying out heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain a pretreated cast nail roller sleeve;
(9) Carrying out surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve at intervals in the circumferential direction of the pretreatment cast nail roller sleeve by using a surfacing process to form a plurality of transition layers, wherein the transition layers are formed by surfacing welding with SL-120 welding wires;
(10) Carrying out surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of first gaps which are axially extended and arranged along the pretreatment cast nail roller sleeve and circumferentially arranged at intervals by a surfacing process so as to correspondingly form a plurality of first wear-resistant layers on a plurality of transition layers, wherein the first wear-resistant layers are formed by surfacing welding SL-902-WG welding wires;
(11) Performing surfacing treatment on a plurality of steel bond hard alloy studs along a plurality of second gaps which are circumferentially extended and axially arranged along the pretreatment cast nail roller sleeve by a surfacing process to form a plurality of second wear-resistant layers, wherein the second wear-resistant layers are formed by surfacing welding through VC-143 welding wires;
(12) It is a plurality of form the build-up welding route between the steel bond carbide stud, the build-up welding route is the wave setting, the welding route includes a plurality of circular arc sections, and is a plurality of the circular arc section corresponds a plurality of the steel bond carbide stud sets up, and each the circular arc section is at least the part around establishing corresponding the steel bond carbide stud sets up, follows through the build-up welding technology the build-up welding route is carried out the build-up welding and is handled to form a plurality of third wearing layer, wherein, the third wearing layer carries out the build-up welding through ceramic stick-resistant welding electrode and forms, wherein, ceramic stick-resistant welding includes core wire and coating, the coating is applied in the core wire outer wall, the coating accounts for the weight coefficient of welding rod total weight and is 0.45, uses the core wire total weight as the benchmark, according to weight percentage, the chemical composition of core wire is as follows: c:3%, cr:8.4%, mn:1.4%, nb:0.18%, mo:0.8%, ti:0.2%, V:0.6%, si:0.6%, P:0.02%, S:0.03%, fe:1.5%, co: the balance, the total weight of the coating is taken as a reference, and the coating comprises the following chemical components in percentage by weight: 19% of marble, 18% of fluorite, 23% of mica and bentonite, 14% of rutile and titanium dioxide, 7% of ferrotitanium, 7% of ferromanganese, 6% of ferrosilicon, 5% of ferrochrome, 2% of nickel and 2% of rare earth oxide.
Example 4
The high chromium cast iron in step (5) was replaced with low alloy wear resistant cast steel, and the rest was the same as in example 1.
Example 5
The high chromium cast iron in step (5) was replaced with medium alloy wear resistant cast steel, and the rest was the same as in example 1.
Example 6
Replacing the mass ratio of the titanium carbide powder, the manganese powder, the prealloyed Fe-Mo powder and the graphite powder in the step (1) with: 45:9:2:7, the rest is the same as example 1.
Example 7
Modifying the current of the electrochemical deposition in step (4) to 1mA/cm 2 Otherwise, the same procedure as in example 2 was repeated.
Comparative example 1
The same procedure as in example 1 was repeated except that "metal nails were not welded to one ends of a plurality of the steel-bonded cemented carbide studs".
Comparative example 2
Step (12) was not performed, and the rest was the same as in example 1.
Fig. 2 is a SEM representation of the roll shell obtained in example 1, and referring to fig. 2, the roll shell has significantly improved compactness, smooth and flat surface, and significantly improved strength and wear resistance.
The above is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the scope of the present invention.
Claims (10)
1. The preparation method of the roller sleeve is characterized by comprising the following steps of:
uniformly mixing titanium carbide powder, manganese powder, prealloyed Fe-Mo powder and graphite powder to obtain a mixed material;
the mixed material is molded into a plurality of stud shapes after being subjected to glue blending and granulation, and a plurality of steel bond hard alloy studs are obtained through vacuum sintering after pre-sintering degumming;
welding metal nails at one ends of the steel bond hard alloy studs, and respectively inserting the other ends of the steel bond hard alloy studs into the arc sand cores for fixing;
splicing a plurality of arc sand cores fixed with the steel bond hard alloy studs according to the circumferential direction of the required roller sleeve to form a prefabricated member;
preheating the prefabricated part, pouring molten metal into the prefabricated part, and after the molten metal is condensed, carrying out insert casting composite forming on the molten metal and the steel bond hard alloy stud to obtain a rough cast nail roller sleeve.
2. The method for preparing the roller shell according to claim 1, wherein the mass ratio of the titanium carbide powder, the manganese powder, the prealloyed Fe-Mo powder and the graphite powder is as follows: 40-80: 5 to 10:20 to 80:6 to 12; and/or the presence of a gas in the gas,
the metal nails comprise copper plated iron nails; and/or the presence of a gas in the gas,
the molten metal is at least one of high-chromium cast iron, high-manganese steel, low-alloy wear-resistant cast steel and medium-alloy wear-resistant cast steel.
3. The method for manufacturing a roll shell according to claim 1, wherein the temperature for preheating the preform is T1, wherein T1 is equal to or higher than 100 ℃ and equal to or lower than 600 ℃; and/or the presence of a gas in the gas,
the temperature of the metal liquid is T2, wherein T2 is more than or equal to 1380 ℃ and less than or equal to 1430 ℃.
4. The method for manufacturing a sleeve as claimed in claim 1, wherein the step of preheating the preform, pouring molten metal into the preform, condensing the molten metal, and insert-casting the molten metal and the steel-bonded cemented carbide stud to form a rough cast-nail sleeve further comprises:
heating the cast nail roller sleeve to a first temperature value, wherein the first temperature value is 700-800 ℃, and the heating rate is 30-50 ℃/h;
heating the cast nail roller sleeve to a second temperature value, wherein the second temperature value is 1050-1100 ℃, and the heating rate is controlled at 100-150 ℃/h;
and carrying out heat preservation treatment and water toughening treatment on the cast nail roller sleeve at the second temperature value to obtain the pretreated cast nail roller sleeve.
5. The method for manufacturing a roll shell according to claim 4, wherein the step of performing heat preservation treatment and water toughening treatment on the cast nail roll shell at the second temperature value to obtain a pretreated cast nail roll shell further comprises:
carrying out surfacing treatment on a plurality of first gaps, which are formed by axially extending a plurality of steel bond hard alloy studs along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve, by a surfacing process to form a plurality of transition layers;
performing surfacing treatment on a plurality of first gaps, which are formed by axially extending a plurality of steel bond hard alloy studs along the pretreatment cast nail roller sleeve and are circumferentially arranged at intervals along the pretreatment cast nail roller sleeve, by a surfacing process so as to correspondingly form a plurality of first wear-resistant layers on a plurality of transition layers;
and (3) performing surfacing treatment on a plurality of second gaps arranged at axial intervals of the pretreatment cast nail roller sleeve to form a plurality of second wear-resistant layers.
6. The method for manufacturing a roller shell according to claim 5, wherein the transition layer is formed by overlaying welding with an SL-120 welding wire; and/or the presence of a gas in the atmosphere,
the first wear-resistant layer is formed by overlaying welding through an SL-902-WG welding wire; and/or the presence of a gas in the gas,
the second wear-resistant layer is formed by overlaying welding through VC-143 welding wires.
7. The method for preparing the roller sleeve according to claim 5, wherein a surfacing path is formed among a plurality of steel bond hard alloy studs, the surfacing path is arranged in a wave shape, the welding path comprises a plurality of circular arc sections, the plurality of circular arc sections are arranged corresponding to the plurality of steel bond hard alloy studs, and each circular arc section is at least partially wound around the corresponding steel bond hard alloy stud;
it is a plurality of to follow through build-up welding technology steel bond carbide stud the setting of extension of preliminary treatment cast nail roller shell circumference and edge a plurality of second gaps that the axial interval of preliminary treatment cast nail roller shell set up carry out the build-up welding and handle to still include after the step of forming a plurality of second wearing layer:
and carrying out surfacing treatment along the surfacing path through a surfacing process to form a plurality of third wear-resistant layers.
8. The method for preparing the roller sleeve according to claim 7, wherein the third wear-resistant layer is formed by surfacing welding with a ceramic wear-resistant electrode, wherein the ceramic wear-resistant electrode comprises a core wire and a coating, the coating is coated on the outer wall of the core wire, the coating accounts for 0.4-0.5 of the total weight of the electrode, and the core wire comprises the following chemical components in percentage by weight based on the total weight of the core wire:
C：2.11～3.86％，Cr：7.3～8.9％，Mn：1.12～1.93％，Nb：0.11～0.28％，
Mo：0.32～0.97％，Ti：0.11～0.39％，V：0.12～0.96％，Si：0.22～0.97％，
p:0.01 to 0.03%, S:0.01 to 0.04%, fe:1 to 2.0%, co: the balance;
the coating takes the total weight of the coating as a reference, and comprises the following chemical components in percentage by weight: 18 to 22 percent of marble, 15 to 20 percent of fluorite, 21 to 26 percent of mica and bentonite, 12 to 15 percent of rutile and titanium dioxide, 5 to 8 percent of ferrotitanium, 5 to 8 percent of ferromanganese, 4 to 7 percent of ferrosilicon, 3 to 6 percent of ferrochromium, 1 to 3 percent of nickel and 1 to 3 percent of rare earth oxide.
9. A roll shell manufactured by the method of manufacturing a roll shell according to any one of claims 1 to 8, wherein the roll shell comprises:
a base housing, and,
and the steel-bonded hard alloy studs are arranged on the inner side surface of the base sleeve at intervals.
10. The roll shell according to claim 9, wherein the plurality of steel-bonded cemented carbide studs are arranged on the inner side surface of the base shell in a gradually sparse arrangement from the middle to both ends of the inner side surface of the base shell.
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| CN117399568A (en) * | 2023-12-14 | 2024-01-16 | 山东硕源工业机械设备有限公司 | Large wear-resistant embedded hard alloy roller sleeve and one-step molding manufacturing method thereof |
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