CN117399568B - Large wear-resistant embedded hard alloy roller sleeve and one-step molding manufacturing method thereof - Google Patents

Large wear-resistant embedded hard alloy roller sleeve and one-step molding manufacturing method thereof Download PDF

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Publication number
CN117399568B
CN117399568B CN202311713148.5A CN202311713148A CN117399568B CN 117399568 B CN117399568 B CN 117399568B CN 202311713148 A CN202311713148 A CN 202311713148A CN 117399568 B CN117399568 B CN 117399568B
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alloy
sand
roller sleeve
molten steel
hard alloy
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CN117399568A (en
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宋志廷
宋志宏
唐涛
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Shandong Shuoyuan Industrial Machinery Equipment Co ltd
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Shandong Shuoyuan Industrial Machinery Equipment Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • 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
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

The invention belongs to the technical field of preparation of roller sleeves, and particularly relates to a large wear-resistant embedded hard alloy roller sleeve and a one-step molding manufacturing method thereof. The invention relates to a one-step molding manufacturing method of a large wear-resistant embedded hard alloy roller sleeve, which comprises the following steps: the method comprises the following steps: embedding the alloy rod into a foam plastic pattern in a drilling and embedding mode, fixing a tool, brushing paint, drying, putting into a sand box, and vacuumizing to obtain a model; placing high-carbon ferromanganese steel and high-carbon ferrochromium into a medium-frequency induction furnace for smelting, adding ferrotitanium alloy, discharging to a pouring ladle, and deoxidizing to obtain molten steel; molten steel, rare earth and ferrotitanium alloy enter a molded foam plastic pattern, and are subjected to casting molding, cooling and heat treatment, and an alloy roller sleeve is obtained after processing. The method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding has the advantages that the comprehensive performance indexes of hardness and toughness of the manufactured roller sleeve are high, the problem of falling off and breakage of the roller sleeve and a parent body is solved, the cost is low, and the construction period is short.

Description

Large wear-resistant embedded hard alloy roller sleeve and one-step molding manufacturing method thereof
Technical Field
The invention belongs to the technical field of preparation of roller sleeves, and particularly relates to a large wear-resistant embedded hard alloy roller sleeve and a one-step molding manufacturing method thereof.
Background
The roller of the roller press is assembled by a roller shaft, a roller sleeve and wear-resistant pins. The roller sleeve is connected with the roller shaft through interference fit (or key and bolt). The assembly is hot-set, and the pressure and plastic deformation of the roller sleeve have larger requirements. The size of the roller sleeve is generally 1200mm in diameter and 800mm in length, and when the length reaches 1000mm for larger sizes, the processing is difficult, and the combination of the alloy roller sleeve and a parent roller shaft prepared by the traditional method is not tight, so that the alloy roller sleeve falls off and breaks. Most of the traditional alloy roller sleeves are manufactured, processed on the roller sleeves, embedded with some alloy for improving wear resistance and the like, namely, the traditional forged steel roller sleeves are drilled and embedded. However, the later processing not only easily causes falling and breakage, but also has complex process, high cost and long construction period, so that the traditional drilling and embedding technology limits the further expansion application.
For example, CN111760636a discloses a roller sleeve of a roller press and a manufacturing process thereof, in order to solve the problems of poor wear-resistant effect and short service life of the roller sleeve of the roller press, a plurality of embedded grooves are formed in the side wall of the roller sleeve body, a plurality of high wear-resistant alloy studs are embedded in the embedded grooves, a wear-resistant welding layer is arranged at the gap of each high wear-resistant alloy stud, the service life is prolonged by the embedded grooves processed later, but the falling risk is still higher, and the cost is high.
For example, CN218796223U discloses a modularized alloy roller sleeve, in order to solve the problem that the roller surface of the prior art is worn and torn and alloy falls off more seriously, a sectional roller sleeve is inlaid on the surface of the roller shaft, one side of the sectional roller sleeve is penetrated with a fastening component, a T-shaped key of the fastening component penetrates through one side of the sectional roller sleeve, a threaded through hole is formed at the top of the sectional roller sleeve, countersunk through holes are formed at two sides of the top of the T-shaped key, an inner hexagon bolt is arranged in the countersunk through holes, a spring pad is sleeved at the top of the surface of the inner hexagon bolt, and the bottom end of the inner hexagon bolt is in threaded connection with the top of the sectional roller sleeve. The problem of falling is solved by adopting the T-shaped key sleeved on the roller and the threaded hole to be connected in series, but the cost is high, the process is complex, and the falling risk is very high.
For example, CN212190605U discloses a novel embedded carbide looper roll, the roll surface of the looper roll body is provided with two groups of embedded grooves near two end surfaces respectively, the embedded grooves on two sides are symmetrically arranged, each group of embedded grooves is formed by uniformly distributing a plurality of independent embedded grooves in a ring shape, each embedded groove is internally and tightly embedded with a carbide block, and the outer surface of the carbide block is kept consistent with the roll surface arc of the looper roll body. For example, CN102974421a discloses a roll sleeve of a roll press, grooves are axially formed on the outer circumferential surface of a sleeve body made of alloy steel, the grooves are uniformly distributed along the circumference, a linear convex rib is formed between two adjacent grooves, welding cracks caused by overlaying are effectively avoided, the wear resistance is good, and the service life is long. The two methods are carried out by drilling and embedding after the preparation is finished, but the technology has the advantages of large engineering quantity, high cost and unobvious improvement of the situation of falling off and fracture.
Therefore, the problems of high drilling and embedding cost and long construction period of the traditional alloy roller sleeve are urgently needed to be improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a one-step forming manufacturing method of a large wear-resistant embedded hard alloy roller sleeve, which solves the problem of falling off and breakage of the roller sleeve and a parent body, and has low cost and short construction period. The roller sleeve manufactured by the method has strong comprehensive performance indexes of hardness and toughness.
The invention relates to a one-step molding manufacturing method of a large wear-resistant embedded hard alloy roller sleeve, which comprises the following steps: the method comprises the following steps:
(1) And (3) implantation modeling:
embedding an alloy rod into a foam plastic model in a drilling and embedding mode, fixing a tool on the foam plastic model, brushing a coating on the outer layer, drying, directly putting into a sand box, filling composite molding sand, arranging a negative pressure air suction pipe in the middle of the foam plastic model, molding the sand box, and vacuumizing to obtain a model;
(2) Smelting molten steel:
placing high-carbon ferromanganese steel and high-carbon ferrochromium into an intermediate frequency induction furnace for smelting, adding ferrotitanium alloy after smelting into molten steel, alloying, discharging to a pouring ladle, and deoxidizing to obtain molten steel;
(3) Pouring:
pouring molten steel in the pouring ladle in the step (2) enters a pouring gate from a riser, rare earth and ferrotitanium alloy are added to the riser through an alloy adding mechanism, the molten steel enters a reaction chamber and a back pouring gate at the same time, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, the casting is cooled to below 300 ℃, a sand box is opened, and a roll sleeve casting is taken out;
(4) And (3) heat treatment:
and (3) treating the roll sleeve casting in a sectional heating mode, immersing in alkaline water, and processing to obtain the large wear-resistant embedded hard alloy roll sleeve.
The sectional heating mode is as follows: heating to 240-260 ℃ at a heating rate of 3.5-4.5 ℃/min, and preserving heat for 1.8-2.2h; then controlling the temperature to be 640-660 ℃ at the temperature rising rate of 0.8-1.2 ℃/min, and preserving the heat for 3.5-4.5 hours; then heating to 1000-1100 ℃ at a heating rate of 2.3-2.6 ℃/min, and preserving heat for 5.8-6.2h. The mass concentration of the alkaline water is 5%.
The alloy rod in the step (1) is W 2 Ti 60 Alloy bars are arranged in a honeycomb shape, the diameter of the alloy bars is 2-20mm, and the length of the alloy bars is 45-55mm.
The composite molding sand in the step (1) is composed of the following components in percentage by mass: 52-60% of precious sand, 12-16% of quartz sand, 12-16% of forsterite sand and 12-16% of natural silica sand.
The powder material of the ball sand is composed of powder materials with the particle size of less than or equal to 104 mu m, 104-140 mu m, 140-180 mu m, 180-200 mu m and 200-400 mu m, wherein the powder material ball sand with the particle size of less than or equal to 104 mu m accounts for 4% of the total mass of the powder material ball sand, the powder material ball sand with the particle size of 104-140 mu m accounts for 5% of the total mass of the powder material ball sand with the particle size of 140-180 mu m accounts for 35% of the total mass of the powder material ball sand, the powder material ball sand with the particle size of 180-200 mu m accounts for 29% of the total mass of the powder material ball sand with the particle size of 200-400 mu m, and the powder material ball sand with the particle size of 27% of the total mass of the powder material ball sand.
The core of the foam plastic model is internally preset with an air extraction supporting mechanism, the air extraction supporting mechanism comprises a supporting piece and an air extraction branch pipe, the cavity of the supporting piece is communicated, the side wall of the supporting piece is provided with an air extraction hole, the air extraction branch pipe is connected with a vacuum extractor, and the supporting piece is horizontally arranged in the composite molding sand of the core of the foam plastic model.
The thickness of the brushing paint in the step (1) is 2.8-3.2mm, and the paint comprises the following components in parts by weight: 22-28 parts of 100-150 mesh forsterite powder, 30-40 parts of 200-250 mesh forsterite, 5-7 parts of paint adhesive, 45-48 parts of water and 0.1-0.3 part of preservative.
Preferably the high carbon ferromanganese steel is Q355 steel.
And (3) vacuumizing in the step (1) to be kept at 0.05-0.07MPa.
Crushing the ferrotitanium alloy in the step (2) and the step (3) to the granularity of 0.5-1.0mm.
The temperature of the smelting and tapping in the step (2) is 1500-1520 ℃.
The deoxidization process in the step (2) is as follows: argon is blown into the bottom of the pouring ladle and stirred, the flow rate of the argon is 200-300NL/min, and the time of the argon blowing is 3-5min.
Vacuumizing in the casting molding process in the step (3), and controlling the vacuum degree to be 0.05-0.06MPa and the casting time to be 60-90s.
The large wear-resistant embedded hard alloy roll sleeve is obtained by a one-step molding manufacturing method of the large wear-resistant embedded hard alloy roll sleeve. The chemical components are as follows according to mass ratio:
C1.1-1.2%；
Si0.3-0.5%；
Mn13-14%；
Cr1.8-2.2%；
Ni0.3-0.5%；
Mo0.5-0.8%；
Ti0.15-0.25%；
0.15 to 0.2 percent of rare earth;
P≤0.02%；
S≤0.02%；
the balance being Fe and unavoidable impurities.
Specifically, the method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding comprises the following steps: the method comprises the following steps:
(1) And (3) implantation modeling:
w with diameter of 2-20mm and length of 45-55mm 2 Ti 60 Embedding the alloy rod into a foam plastic pattern in a drilling and embedding mode, arranging in a honeycomb mode, fixing the foam plastic pattern by a tool, brushing a coating with the thickness of 2.8-3.2mm on the outer layer, drying, directly putting into a sand box, filling composite molding sand, arranging a negative pressure air suction pipe in the middle of the foam plastic pattern, molding the sand box, vacuumizing and keeping the pressure at 0.05-0.07MPa to obtain a model;
the composite molding sand consists of the following components in percentage by mass: 52-60% of precious sand, 12-16% of quartz sand, 12-16% of forsterite sand and 12-16% of natural silica sand; the powder material of the ball sand is composed of powder materials with the particle size of less than or equal to 104 mu m, 104-140 mu m, 140-180 mu m, 180-200 mu m and 200-400 mu m, wherein the powder material ball sand with the particle size of less than or equal to 104 mu m accounts for 4% of the total mass of the powder material ball sand, the powder material ball sand with the particle size of 104-140 mu m accounts for 5% of the total mass of the powder material ball sand with the particle size of 140-180 mu m accounts for 35% of the total mass of the powder material ball sand, the powder material ball sand with the particle size of 180-200 mu m accounts for 29% of the total mass of the powder material ball sand with the particle size of 200-400 mu m, and the powder material ball sand with the particle size of 27% of the total mass of the powder material ball sand.
The core of the foam plastic model is internally preset with an air extraction supporting mechanism, the air extraction supporting mechanism comprises a supporting piece and an air extraction branch pipe, the cavity of the supporting piece is communicated, the side wall of the supporting piece is provided with an air extraction hole, the air extraction branch pipe is connected with a vacuum extractor, and the supporting piece is horizontally arranged in the composite molding sand of the core of the foam plastic model.
The coating comprises the following components in parts by weight: 22-28 parts of 100-150 mesh forsterite powder, 30-40 parts of 200-250 mesh forsterite, 5-7 parts of paint adhesive, 45-48 parts of water and 0.1-0.3 part of preservative.
(2) Smelting molten steel:
placing Q355 steel high-carbon ferromanganese steel and high-carbon ferrochrome into an intermediate frequency induction furnace, smelting at 1500-1520 ℃, adding ferrotitanium alloy with granularity of 0.5-1.0mm after smelting into molten steel, alloying, discharging from a furnace at 1500-1520 ℃ to a pouring ladle, blowing argon at the bottom of the pouring ladle, stirring, wherein the flow rate of the blown argon is 200-300NL/min, the time of blowing argon is 3-5min, and deoxidizing to obtain molten steel.
(3) Pouring:
molten steel in the pouring ladle in the step (2) enters a pouring gate from a riser, rare earth and ferrotitanium alloy with granularity of 0.5-1.0mm are added to the riser through an alloy adding mechanism, meanwhile, the molten steel enters a reaction chamber and a back pouring gate, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, vacuum pumping is carried out in the casting molding process, the vacuum degree is controlled to be 0.05-0.06MPa, the casting time is 60-90s, and a sand box is opened and a roll sleeve casting is taken out after the casting is finished and cooled to below 300 ℃.
(4) And (3) heat treatment:
the roller sleeve casting is treated in a sectional heating mode: heating to 240-260 ℃ at a heating rate of 3.5-4.5 ℃/min, and preserving heat for 1.8-2.2h; then controlling the temperature to be 640-660 ℃ at the temperature rising rate of 0.8-1.2 ℃/min, and preserving the heat for 3.5-4.5 hours; and then heating to 1000-1100 ℃ at a heating rate of 2.3-2.6 ℃/min, preserving heat for 5.8-6.2h, immersing in 5% alkali water, and processing to obtain the large wear-resistant embedded hard alloy roll sleeve. The 5% aqueous alkali is a 5% caustic soda solution by weight.
Compared with the prior art, the invention has the following beneficial effects:
(1) The large wear-resistant embedded hard alloy roller sleeve prepared by the method has the advantages of good comprehensive performance index of hardness and toughness, wear resistance, difficult fracture and long service life.
(2) Compared with the traditional later-stage drilling and embedding method, the method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding has the advantages of short construction period, low cost and difficult falling off of the roller shaft parent body.
Drawings
FIG. 1 is a schematic representation of a foam pattern of the present invention.
FIG. 2 is a cross-sectional view of a large wear resistant inlaid cemented carbide roll cover made in accordance with the present invention.
FIG. 3 is a side view of a large wear resistant inlaid cemented carbide roll cover made in accordance with the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples.
The device structures employed in the following examples and comparative examples are not discussed. The raw materials are all commercial products. The large wear-resistant embedded hard alloy roller sleeves prepared in the following examples are all 1200mm in inner diameter and 1000mm in length. The powder material of the ball sand is composed of powder materials with the particle size of less than or equal to 104 mu m, 104-140 mu m, 140-180 mu m, 180-200 mu m and 200-400 mu m, wherein the powder material ball sand with the particle size of less than or equal to 104 mu m accounts for 4% of the total mass of the powder material ball sand, the powder material ball sand with the particle size of 104-140 mu m accounts for 5% of the total mass of the powder material ball sand with the particle size of 140-180 mu m accounts for 35% of the total mass of the powder material ball sand, the powder material ball sand with the particle size of 180-200 mu m accounts for 29% of the total mass of the powder material ball sand with the particle size of 200-400 mu m, and the powder material ball sand with the particle size of 27% of the total mass of the powder material ball sand. The mass composition of the rare earth adopted in the following examples is 35% La and 65% Ce, wherein the impurity content in the rare earth is controlled to be less than 1.5%. The foam pattern used in the following examples is shown in FIG. 1.
Example 1
The large wear-resistant embedded hard alloy roller sleeve comprises the following chemical components in percentage by mass:
C1.2%；
Si0.4%；
Mn13%；
Cr2.0%；
Ni0.4%；
Mo0.7%；
Ti0.2%；
rare earth 0.2%;
P0.016%；
S0.013%；
the balance being Fe and unavoidable impurities.
The method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding comprises the following steps: the method comprises the following steps:
(1) And (3) implantation modeling:
the diameter was 16mm and the length was 50mm W 2 Ti 60 The alloy rod is embedded into the foam plastic pattern in a drilling and embedding mode, and is arranged in a honeycomb shape, the foam plastic pattern is fixed in a fixture, the outer layer is brushed with paint with the thickness of 2.8mm, after being dried, the alloy rod is directly put into a sand box, composite molding sand is filled, and the alloy rod is arranged in the foamA negative pressure air suction pipe is arranged in the middle of the plastic pattern, a sand box is sealed in a plastic way, and vacuumizing is carried out, and the pressure is kept at 0.06MPa, so that a model is obtained;
the composite molding sand consists of the following components in percentage by mass: 60% of precious sand, 14% of quartz sand, 12% of forsterite sand and 14% of natural silica sand;
the foam plastic pattern core is internally provided with an air extraction supporting mechanism which comprises a supporting piece and an air extraction branch pipe, wherein the cavity of the supporting piece is communicated, the side wall of the supporting piece is provided with an air extraction hole, the air extraction branch pipe is connected with a vacuum extractor, and the supporting piece is horizontally arranged in the composite molding sand of the foam plastic pattern core;
the coating comprises the following components in parts by weight: 22 parts of 100-150 mesh forsterite powder, 35 parts of 200-250 mesh forsterite, 6 parts of paint binder, 45 parts of water and 0.2 part of preservative.
(2) Smelting molten steel:
placing Q355 steel high-carbon ferromanganese steel and high-carbon ferrochrome into an intermediate frequency induction furnace, smelting at 1500 ℃, adding ferrotitanium alloy with granularity of 0.5-1.0mm after smelting into molten steel, alloying, discharging from the furnace at 1500 ℃ to a pouring ladle, blowing argon at the bottom of the pouring ladle, stirring, wherein the flow rate of the blown argon is 200NL/min, the time of blowing argon is 3min, and deoxidizing to obtain molten steel.
(3) Pouring:
molten steel in the pouring ladle in the step (2) enters a front pouring gate from a riser, rare earth and ferrotitanium alloy with granularity of 0.5-1.0mm are added to the riser through an alloy adding mechanism, meanwhile, the molten steel enters a reaction chamber and a rear pouring gate, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, vacuumizing is carried out in the casting molding process, the vacuum degree is controlled to be 0.05MPa, the casting time is 70s, the casting is finished and cooled to be lower than 300 ℃, a sand box is opened, and a roll sleeve casting is taken out.
(4) And (3) heat treatment:
the roller sleeve casting is treated in a sectional heating mode: heating to 250 ℃ at a heating rate of 4 ℃/min, and preserving heat for 2h; then controlling the temperature to be 650 ℃ at a heating rate of 1.0 ℃/min, and preserving the heat for 4 hours; and then controlling the temperature to be raised to 1100 ℃ at the heating rate of 2.5 ℃/min, preserving the heat for 6 hours, immersing in 5% alkali water, and carrying out finish machining to obtain the large wear-resistant embedded hard alloy roller sleeve.
Example 2
The large wear-resistant embedded hard alloy roller sleeve comprises the following chemical components in percentage by mass:
C1.1%；
Si0.3%；
Mn14%；
Cr1.8%；
Ni0.3%；
Mo0.6%；
Ti0.25%；
rare earth 0.18%;
P0.013%；
S0.012%；
the balance being Fe and unavoidable impurities.
The method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding comprises the following steps: the method comprises the following steps:
(1) And (3) implantation modeling:
w with a diameter of 2mm and a length of 45mm 2 Ti 60 Embedding the alloy rod into a foam plastic pattern in a drilling and embedding mode, arranging in a honeycomb mode, fixing the foam plastic pattern in a fixture, brushing a coating with the thickness of 3.2mm on the outer layer, drying, directly putting into a sand box, filling composite molding sand, arranging a negative pressure air suction pipe in the middle of the foam plastic pattern, molding the sand box, vacuumizing and keeping at 0.06MPa to obtain a model;
the composite molding sand consists of the following components in percentage by mass: 52% of precious sand, 16% of quartz sand, 16% of forsterite sand and 16% of natural silica sand;
the foam plastic pattern core is internally provided with an air extraction supporting mechanism which comprises a supporting piece and an air extraction branch pipe, wherein the cavity of the supporting piece is communicated, the side wall of the supporting piece is provided with an air extraction hole, the air extraction branch pipe is connected with a vacuum extractor, and the supporting piece is horizontally arranged in the composite molding sand of the foam plastic pattern core;
the coating comprises the following components in parts by weight: 24 parts of 100-150 mesh forsterite powder, 30 parts of 200-250 mesh forsterite, 5 parts of paint binder, 48 parts of water and 0.1 part of preservative.
(2) Smelting molten steel:
and (3) putting the Q355 steel high-carbon ferromanganese steel and the high-carbon ferrochrome into an intermediate frequency induction furnace, smelting at the temperature of 1508 ℃, adding ferrotitanium alloy with the granularity of 0.5-1.0mm after smelting into molten steel, alloying, discharging from the furnace to a pouring ladle at the temperature of 1508 ℃, blowing argon at the bottom of the pouring ladle, stirring, blowing argon at the flow rate of 300NL/min for 5min, and deoxidizing to obtain molten steel.
(3) Pouring:
molten steel in the pouring ladle in the step (2) enters a pouring gate from a riser, rare earth and ferrotitanium alloy with granularity of 0.5-1.0mm are added to the riser through an alloy adding mechanism, meanwhile, the molten steel enters a reaction chamber and a back pouring gate, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, vacuum pumping is carried out in the casting molding process, the vacuum degree is controlled to be 0.05MPa, the casting time is 80s, the casting is finished and cooled to be lower than 300 ℃, a sand box is opened, and a roll sleeve casting is taken out.
(4) And (3) heat treatment:
the roller sleeve casting is treated in a sectional heating mode: heating to 240 ℃ at a heating rate of 3.5 ℃/min, and preserving heat for 1.8h; then controlling the temperature to be 640 ℃ at the temperature rising rate of 0.8 ℃/min, and preserving the heat for 3.5h; and then heating to 1000 ℃ at a heating rate of 2.3 ℃/min, preserving heat for 5.8 hours, immersing in 5% alkali water, and carrying out finish machining to obtain the large wear-resistant embedded hard alloy roller sleeve.
Example 3
The large wear-resistant embedded hard alloy roller sleeve comprises the following chemical components in percentage by mass:
C1.1%；
Si0.5%；
Mn13%；
Cr2.0%；
Ni0.4%；
Mo0.5%；
Ti0.15%；
rare earth 0.15%;
P0.009%；
S0.01%；
the balance being Fe and unavoidable impurities.
The method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding comprises the following steps: the method comprises the following steps:
(1) And (3) implantation modeling:
the diameter was 16mm and the length was 50mm W 2 Ti 60 Embedding the alloy rod into a foam plastic pattern in a drilling and embedding mode, arranging in a honeycomb mode, fixing the foam plastic pattern in a fixture, brushing a coating with the thickness of 3.0mm on the outer layer, drying, directly putting into a sand box, filling composite molding sand, arranging a negative pressure air suction pipe in the middle of the foam plastic pattern, molding the sand box, vacuumizing and keeping at 0.06MPa to obtain a model;
the composite molding sand consists of the following components in percentage by mass: 60% of precious sand, 15% of quartz sand, 13% of forsterite sand and 12% of natural silica sand;
the foam plastic pattern core is internally provided with an air extraction supporting mechanism which comprises a supporting piece and an air extraction branch pipe, wherein the cavity of the supporting piece is communicated, the side wall of the supporting piece is provided with an air extraction hole, the air extraction branch pipe is connected with a vacuum extractor, and the supporting piece is horizontally arranged in the composite molding sand of the foam plastic pattern core;
the coating comprises the following components in parts by weight: 28 parts of 100-150 mesh forsterite powder, 30 parts of 200-250 mesh forsterite, 5 parts of paint binder, 46 parts of water and 0.1 part of preservative.
(2) Smelting molten steel:
placing Q355 steel high-carbon ferromanganese steel and high-carbon ferrochrome into an intermediate frequency induction furnace, smelting at 1520 ℃, adding ferrotitanium alloy with granularity of 0.5-1.0mm after smelting into molten steel, alloying, discharging from the furnace to a pouring ladle at 1520 ℃, blowing argon at the bottom of the pouring ladle, stirring, wherein the flow rate of the blown argon is 250NL/min, the blowing argon time is 4min, and deoxidizing to obtain molten steel.
(3) Pouring:
molten steel in the pouring ladle in the step (2) enters a pouring gate from a riser, rare earth and ferrotitanium alloy with granularity of 0.5-1.0mm are added to the riser through an alloy adding mechanism, meanwhile, the molten steel enters a reaction chamber and a back pouring gate, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, vacuum pumping is carried out in the casting molding process, the vacuum degree is controlled to be 0.06MPa, the casting time is 60s, the casting is finished, the casting is cooled to be lower than 300 ℃, a sand box is opened, and a roll sleeve casting is taken out.
(4) And (3) heat treatment:
the roller sleeve casting is treated in a sectional heating mode: heating to 260 ℃ at a heating rate of 4.5 ℃/min, and preserving heat for 2.2h; then controlling the temperature to be higher than 660 ℃ at the heating rate of 1.2 ℃/min, and preserving the heat for 4.5 hours; and then controlling the temperature to be raised to 1100 ℃ at the temperature raising rate of 2.6 ℃/min, preserving the heat for 6.2 hours, immersing in 5% alkali water, and carrying out finish machining to obtain the large wear-resistant embedded hard alloy roller sleeve.
Example 4
The large wear-resistant embedded hard alloy roller sleeve comprises the following chemical components in percentage by mass:
C1.2%；
Si0.4%；
Mn14%；
Cr2.2%；
Ni0.5%；
Mo0.8%；
Ti0.2%；
rare earth 0.2%;
P0.01%；
S0.011%；
the balance being Fe and unavoidable impurities.
The method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding comprises the following steps: the method comprises the following steps:
(1) And (3) implantation modeling:
w of 20mm diameter and 55mm length was used 2 Ti 60 The alloy bars are embedded into the foam plastic pattern in a drilling and embedding mode, are arranged in a honeycomb mode, are fixed in a fixture, are brushed with paint with the thickness of 3.0mm on the outer layer, are directly put into a sand box and filled with composite molding sand after being dried, are provided with a negative pressure air suction pipe in the middle of the foam plastic pattern, are molded into the sand box, and are vacuumized and kept at 0.07MPa to obtain the composite molding sandTo shape;
the composite molding sand consists of the following components in percentage by mass: 58% of precious sand, 12% of quartz sand, 15% of forsterite sand and 15% of natural silica sand;
the foam plastic pattern core is internally provided with an air extraction supporting mechanism which comprises a supporting piece and an air extraction branch pipe, wherein the cavity of the supporting piece is communicated, the side wall of the supporting piece is provided with an air extraction hole, the air extraction branch pipe is connected with a vacuum extractor, and the supporting piece is horizontally arranged in the composite molding sand of the foam plastic pattern core;
the coating comprises the following components in parts by weight: 25 parts of 100-150 mesh forsterite powder, 40 parts of 200-250 mesh forsterite, 7 parts of paint binder, 47 parts of water and 0.3 part of preservative.
(2) Smelting molten steel:
placing Q355 steel high-carbon ferromanganese steel and high-carbon ferrochrome into an intermediate frequency induction furnace, smelting at 1510 ℃, adding ferrotitanium alloy with granularity of 0.5-1.0mm after smelting into molten steel, alloying, discharging at 1510 ℃ to a pouring ladle, blowing argon at the bottom of the pouring ladle, stirring, wherein the flow rate of the blown argon is 250NL/min, the time of blowing argon is 3min, and deoxidizing to obtain molten steel.
(3) Pouring:
molten steel in the pouring ladle in the step (2) enters a pouring gate from a riser, rare earth and ferrotitanium alloy with granularity of 0.5-1.0mm are added to the riser through an alloy adding mechanism, meanwhile, the molten steel enters a reaction chamber and a back pouring gate, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, vacuum pumping is carried out in the casting molding process, the vacuum degree is controlled to be 0.06MPa, the casting time is 90s, the casting is finished and cooled to be lower than 300 ℃, a sand box is opened, and a roll sleeve casting is taken out.
(4) And (3) heat treatment:
the roller sleeve casting is treated in a sectional heating mode: heating to 250 ℃ at a heating rate of 4 ℃/min, and preserving heat for 2h; then controlling the temperature to be increased to 650 ℃ at the heating rate of 1 ℃/min, and preserving the heat for 4 hours; and then controlling the temperature to 1050 ℃ at a heating rate of 2.4 ℃/min, preserving heat for 6 hours, immersing in 5% alkali water, and carrying out finish machining to obtain the large wear-resistant embedded hard alloy roller sleeve.
Comparative example 1
This comparative example is different from example 1 in that W in step (1) 2 Ti 60 The alloy rod was removed and then the manufacturing method, the chemical composition was exactly the same as in example 1.
Comparative example 2
In this comparative example, W is as compared with example 1 2 Ti 60 The alloy rod was subjected to W by the method in CN111760636A 2 Ti 60 The alloy rod is inlaid on the prepared roller sleeve.
The cross section of the large wear-resistant embedded hard alloy roller sleeve prepared by the invention is shown in fig. 2, and the side view is shown in fig. 3.
The roller sleeves prepared in the examples and the comparative examples are used on a roller press, and long-term trial shows that the roller sleeves obtained in the examples 1-4 have long service cycle, good comprehensive performance of hardness and toughness of the large wear-resistant embedded hard alloy roller, and well control the tight combination of the alloy rod and the matrix of the large wear-resistant embedded hard alloy roller, and the roller sleeves are free from falling off and breaking, low in cost and short in construction period. Compared with the traditional roller sleeve, the roller sleeves in the embodiments 1-4 have the characteristics of high hardness, high toughness, long service life, strong impact resistance and the like, the service quality and the service life of the roller sleeve are greatly improved, the roller sleeve is always in a high-efficiency state, and the cost is saved. Comparative example 1 without the addition of W 2 Ti 60 When the alloy rod is used, the service cycle is obviously short, the alloy rod cannot be repaired after being worn, the cost is high, the efficiency is low, the traditional embedding mode is adopted in comparative example 2, and the alloy rod is long in manufacturing time and high in cost. In the long-term use process, the falling degree is improved compared with that of the comparative example 2, but the falling degree is still more frequent, the construction period is long and the efficiency is low compared with that of the examples 1-4.

Claims (3)

1. A one-step molding manufacturing method of a large wear-resistant embedded hard alloy roller sleeve is characterized by comprising the following steps of: the method comprises the following steps:
(1) And (3) implantation modeling:
will W 2 Ti 60 Embedding the alloy rod into a foam plastic model in a drilling and embedding mode, fixing the foam plastic model by a tool, brushing a coating on the outer layer, directly putting into a sand box and filling composite molding sand after drying, arranging a negative pressure air suction pipe in the middle of the foam plastic model, molding the sand box, vacuumizing, and keeping the vacuumizing at 0.05-0.07MPa to obtain the model;
the thickness of the brushing paint is 2.8-3.2mm, and the paint comprises the following components in parts by weight: 22-28 parts of 100-150 mesh forsterite powder, 30-40 parts of 200-250 mesh forsterite, 5-7 parts of paint adhesive, 45-48 parts of water and 0.1-0.3 part of preservative;
the composite molding sand consists of the following components in percentage by mass: 52-60% of precious sand, 12-16% of quartz sand, 12-16% of forsterite sand and 12-16% of natural silica sand;
(2) Smelting molten steel:
placing high-carbon ferromanganese steel and high-carbon ferrochromium into an intermediate frequency induction furnace for smelting, adding ferrotitanium alloy after smelting into molten steel, alloying, discharging to a pouring ladle, and deoxidizing to obtain molten steel;
the smelting and tapping temperatures are 1500-1520 ℃;
the deoxidization process comprises the following steps: argon is blown into the bottom of the pouring ladle and stirred, the flow rate of the argon is 200-300NL/min, and the time of the argon blowing is 3-5min;
(3) Pouring:
pouring molten steel in the pouring ladle in the step (2) enters a pouring gate from a riser, rare earth and ferrotitanium alloy are added to the riser through an alloy adding mechanism, the molten steel enters a reaction chamber and a back pouring gate at the same time, finally, the molten steel enters a foam plastic model molded in the step (1) for casting molding, the casting is cooled to below 300 ℃, a sand box is opened, and a roll sleeve casting is taken out;
vacuumizing in the casting molding process, controlling the vacuum degree to be 0.05-0.06MPa, and casting for 60-90s;
(4) And (3) heat treatment:
the roll sleeve casting is treated in a sectional heating mode, immersed in alkaline water and processed to obtain a large wear-resistant embedded hard alloy roll sleeve; the large wear-resistant embedded hard alloy roller sleeves are all 1200mm in inner diameter and 1000mm in length;
the sectional heating mode is as follows: heating to 240-260 ℃ at a heating rate of 3.5-4.5 ℃/min, and preserving heat for 1.8-2.2h; then controlling the temperature to be 640-660 ℃ at the temperature rising rate of 0.8-1.2 ℃/min, and preserving the heat for 3.5-4.5 hours; then heating to 1000-1100 ℃ at a heating rate of 2.3-2.6 ℃/min, and preserving heat for 5.8-6.2h.
2. The method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding according to claim 1, which is characterized in that: w in step (1) 2 Ti 60 The alloy bars are arranged in a honeycomb shape, the diameter of the alloy bars is 2-20mm, and the length of the alloy bars is 45-55mm.
3. The utility model provides a large-scale wear-resisting carbide roller shell of inlaying which characterized in that: is obtained by the method for manufacturing the large wear-resistant embedded hard alloy roller sleeve by one-step molding according to any one of claims 1-2;
the large wear-resistant embedded hard alloy roller sleeve comprises the following chemical components in percentage by mass:
C1.1-1.2%；
Si0.3-0.5%；
Mn13-14%；
Cr1.8-2.2%；
Ni0.3-0.5%；
Mo0.5-0.8%；
Ti0.15-0.25%；
0.15 to 0.2 percent of rare earth;
P≤0.02%；
S≤0.02%；
the balance being Fe and unavoidable impurities.
CN202311713148.5A 2023-12-14 2023-12-14 Large wear-resistant embedded hard alloy roller sleeve and one-step molding manufacturing method thereof Active CN117399568B (en)

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CN215481031U (en) * 2021-06-07 2022-01-11 武汉市科发铁合金有限公司 Wear-resistant lining plate embedded with hard alloy
CN115319097A (en) * 2022-07-25 2022-11-11 湖北秦鸿新材料股份有限公司 Preparation method of roller sleeve and roller sleeve
CN115780025A (en) * 2022-11-18 2023-03-14 山东山水重工有限公司 Grinding roller of vertical mill and preparation method thereof

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CN107150455A (en) * 2017-06-01 2017-09-12 江苏双发机械有限公司 A kind of composite casting hard alloy stud pressure roller and manufacture method
CN109465418A (en) * 2018-12-12 2019-03-15 中钢集团邢台机械轧辊有限公司 A kind of roller sleeve of roller press and its manufacturing method
CN110846582A (en) * 2019-12-23 2020-02-28 浙江联创焊接技术有限公司 Squeeze roller sleeve in roller press and preparation method thereof
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Denomination of invention: Large scale wear-resistant inlaid hard alloy roller sleeve and its one-step forming manufacturing method

Granted publication date: 20240223

Pledgee: Yiyuan sub branch of industrial and Commercial Bank of China Ltd.

Pledgor: SHANDONG SHUOYUAN INDUSTRIAL MACHINERY EQUIPMENT CO.,LTD.

Registration number: Y2024980008150