CN108486448B - Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar - Google Patents

Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar Download PDF

Info

Publication number
CN108486448B
CN108486448B CN201810254730.2A CN201810254730A CN108486448B CN 108486448 B CN108486448 B CN 108486448B CN 201810254730 A CN201810254730 A CN 201810254730A CN 108486448 B CN108486448 B CN 108486448B
Authority
CN
China
Prior art keywords
sintering
ball milling
temperature
roll collar
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810254730.2A
Other languages
Chinese (zh)
Other versions
CN108486448A (en
Inventor
李烨飞
何林
高义民
刘志伟
郑巧玲
霍旭旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Datang Shengye Information Technology Co ltd
Xian Jiaotong University
Original Assignee
Shaanxi Datang Shengye Information Technology Co ltd
Xian Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shaanxi Datang Shengye Information Technology Co ltd, Xian Jiaotong University filed Critical Shaanxi Datang Shengye Information Technology Co ltd
Priority to CN201810254730.2A priority Critical patent/CN108486448B/en
Publication of CN108486448A publication Critical patent/CN108486448A/en
Application granted granted Critical
Publication of CN108486448B publication Critical patent/CN108486448B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • 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
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B22F5/106—Tube or ring forms
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Products (AREA)

Abstract

A process for preparing the multi-phase titanium diboride/titanium carbonitride-stainless steel-metal ceramic roller ring of hot rolling mill includes such steps as proportionally mixing TiB2Uniformly mixing Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder, wet-grinding under the protection of argon, drying and sieving to obtain powder; putting the powder into a metal die for compression molding to form a roll collar shape; firstly, putting a blank in the shape of a roll collar into a solid phase for sintering to prepare a hot roll collar preform; machining the hot roll ring preform to obtain the required roll ring size; and (3) sintering the prefabricated body of the hot roll ring after mechanical processing at high temperature to obtain the titanium diboride/titanium carbonitride-stainless steel cermet hot roll ring. The process is easy to operate, the prepared metal ceramic is simple in components, free of W, Co strategic scarce resources, low in Ni content, low in cost, good in wear resistance, long in service life and light in weight, and is suitable for industrial popularization.

Description

Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar
Technical Field
The invention belongs to a hot mill cermet roll collar, and particularly relates to a preparation method of a multiphase titanium diboride/titanium carbonitride-stainless steel cermet roll collar of a hot mill.
Background
The metal ceramic has high hardness, high temperature resistance, good wear resistance and corrosion resistance, and is widely used in the industrial wear-resistant field. With Ti (C, N) and TiB2The composite hard phase metal ceramic with the ceramic as the hard phase generally has fine crystal grains, excellent mechanical property, good wear resistance and high temperature resistanceThe oxidability is a novel material for preparing a high-speed hot roll.
The cemented carbide roll collar used by the existing hot rolling mill is prepared by WC and Co through hot-pressing sintering, and the roll collar has the defects that W, Co and other strategic scarce elements are used in large quantity, the price is high, the supply is unstable, the price of the common cemented carbide roll is high, and the production cost of enterprises is increased; WC and Co begin to oxidize at the temperature higher than 500 ℃, and the high-temperature resistance of the hard alloy hot roll is poor; and Co is easily dissolved in acid and can be corroded in the presence of cooling water, so that the service life and the processing quality of the hard alloy hot roll collar are reduced. Therefore, under the condition of ensuring excellent mechanical properties, the cost of the metal ceramic roll collar is reduced, and the oxidation resistance and the acid corrosion resistance are improved, thereby having important significance.
Chinese patent publication No. CN 1174764A entitled "cermet roller ring" discloses a roller ring made of WC and Al2O3、ZrO2Co is used as the main component, and 2-10 wt.% of NbC or TaC is added into the metal ceramic roll ring. Although the roll collar has higher hardness and wear resistance and can improve the production efficiency of a hot rolling mill, the cermet roll has high density and high energy consumption, and a large amount of toxic WC and Co is used, so that the cermet has high production cost and toxic action on production workers.
Chinese patent publication No. CN 101716656a, entitled "a metal ceramic composite roll collar and a method for manufacturing the same", discloses a metal ceramic composite roll collar, in which the metal ceramic used as the roll collar is composed of the following components: 20-60 wt.% of Mo, Fe: 30-50 wt.%, B: 1-15 wt.%, V: 1-15 wt.%, Cr: 1-15 wt.%, Ni: 1-15 wt.%, C: 0.1-2 wt.%. The composite roll collar has lower cost and good wear resistance, but the hard phase in the metal ceramic roll collar is generated in situ, generally, the grains are coarse, the hardness of the material is not high, and the brittleness is higher.
Disclosure of Invention
The invention aims to overcome the defects and provides a preparation method of the multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar comprises the following steps:
(1) mixing materials: according to the weight percentage of TiB2: 1-20%, Ti (C, N): 59% -79%, Fe: 14% -30%, Ni: 1.8% -4%, Cr: 3% -8%, Mn: 0.15% -0.35%, Si: 0.04% -0.09% and C powder: 0.01 to 0.03 percent of TiB2Uniformly mixing Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder, wet-grinding under the protection of argon, drying and sieving to obtain powder;
(2) putting the powder into a metal die for compression molding to form a roll collar shape;
(3) solid-phase sintering: firstly, putting a blank in the shape of a roll collar into a solid phase for sintering to prepare a hot roll collar preform;
(4) and (3) machining: machining the hot roll ring preform to obtain the required roll ring size;
(5) and (3) high-temperature sintering: and (3) sintering the prefabricated body of the hot roll ring after mechanical processing at high temperature to obtain the titanium diboride/titanium carbonitride-stainless steel cermet hot roll ring.
The invention is further improved in that the wet grinding tool body process in the step (1) is as follows: putting the uniformly mixed powder into a ball milling tank, adding anhydrous ethanol which accounts for 1% -2% of the mass of the uniformly mixed powder and serves as a medium, vacuumizing the ball milling tank, and filling argon, wherein the ball material mass ratio is (5-20): 1, the ball milling speed is 150 r/min-300 r/min, and the ball milling time is 4 h-20 h.
The further improvement of the invention is that the drying process in the step (1) is as follows: drying by a rotary evaporator at the temperature of 55-75 ℃ and the vacuum degree of 0.09 MPa.
The further improvement of the invention is that the compression molding in the step (2) is specifically as follows: keeping the pressure for 30-120 s under the pressure of 100-400 MPa.
The further improvement of the invention is that in the step (3), the sintering temperature is 800-1000 ℃, and the time is 10-90 min.
The invention is further improved in that the vacuum degree during high-temperature sintering in the step (5) is 10-2Pa。
The further improvement of the invention is that the sintering temperature in the step (5) is 1200-1500 ℃, and the sintering time is 0.5-1.5 h.
The invention has the further improvement that in the step (5), the temperature is raised from room temperature, the temperature raising rate below 1000 ℃ is 8 ℃/min, and the temperature raising rate above 1000 ℃ is 4 ℃/min.
The invention is further improved in that the sintering in the step (5) is cooled along with the furnace.
The invention is further improved in that the hardness value range of the cermet hot rolling mill roll collar is 75 HRA-93 HRA, and the bending strength is 800 MPa-1800 MPa.
Compared with the prior art, the invention has the following beneficial effects: the TiB is prepared by mixing, wet grinding, drying, compression molding and vacuum sintering the raw materials2the/Ti (C, N) -stainless steel cermet roller ring material has simple components, does not contain W, Co and other strategic scarce resources, uses Ni with low content, and adopts TiB2The Ti (C, N) is a hard phase, the stainless steel is a binding phase, and the cost is low; the invention does not use poisonous WC and Co, so the production cost is low and the invention has no toxic effect on production workers. In the invention, TiB is added2On one hand, the liquid B can be formed under the high-temperature oxidation environment2O3An oxide film playing a role in lubricating and reducing friction, and on the other hand TiB2The metal ceramic roll can be used as a nucleation substrate to promote non-spontaneous nucleation and is beneficial to obtaining the metal ceramic roll with fine hard phase grains. The formed metal ceramic roll collar has high density, good wear resistance, long service life, light weight and excellent main mechanical indexes (the hardness is 75-93 HRAHRA, and the bending strength is 800-1800 MPa), can be used for high-temperature finish rolling working conditions, and is suitable for industrial popularization.
Drawings
FIG. 1 is a schematic view of the structure of the roll collar of the hot cermet rolling mill of the present invention.
FIG. 2 is SEM image of the roller ring of the hot rolling mill for metal ceramics.
Wherein 1 is a metal roll collar.
Detailed Description
The invention is further illustrated by the following examples:
TiB of the invention2A process for preparing the roll ring of Ti (C, N) -stainless steel-metal ceramic hot rolling mill features that its roll ring is TiB2The stainless steel consists of Fe, Ni, Cr, Mn, Si and C elements. The weight ratio of each component is TiB21-20%, Ti (C, N): 59% -79%, Fe: 20% -30%, Ni: 2.5% -3.5%, Cr: 5% -6.5%, Mn: 0.2% -0.3%, Si: 0.05% -0.08%, C: 0.02 to 0.03 percent. The specific implementation method comprises the following steps: 1) mixing the powder according to the proportion; 2) wet grinding in a high-energy planetary ball mill after mixing; 3) drying the ball-milled slurry; 4) molding the dried powder by using a molding press to prepare a roll collar blank; 5) carrying out solid-phase sintering on the roll collar blank in a vacuum sintering furnace to prepare a roll collar preform; 6) taking the roll collar preform out of the vacuum furnace for cutting and finish machining; 7) and (4) placing the processed metal ceramic preform into a vacuum furnace for high-temperature sintering to obtain the metal ceramic roll collar. The process is easy to operate, the prepared metal ceramic is simple in components, free of W, Co strategic scarce resources, low in Ni content, low in cost, good in wear resistance, long in service life and light in weight, and is suitable for industrial popularization.
Example 1
Multiphase TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) mixing materials: selecting TiB with the purity of not less than 99 percent on the market2Ti (C, N) (titanium carbonitride), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the mass percentage of each component is TiB2:1％，Ti(C,N)：74％，Fe：17.965％，Ni：2.25％，Cr：4.5％，Mn：0.2125％，Si：0.055% and C: 0.0175 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 10: 1, ball milling rotation speed is 300r/min, and ball milling time is 20 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying at the drying temperature of 55 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) compression molding: putting the dried powder into a metal mold, and performing compression molding under the pressure of 200MPa to obtain a molded blank, wherein the pressure maintaining time is 60 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, the sintering time is half an hour, and a hot rolling roll collar preform is obtained after furnace cooling;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1450 ℃, the sintering time is half an hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot-rolled roll collar.
As shown in fig. 1 and 2, fig. 1 is a schematic structural diagram of a metal roll collar 1, wherein the metal roll collar 1 is cylindrical and is prepared into different sizes according to actual working conditions and requirements; FIG. 2 is an electron microscope scanning image of the cermet roller ring, from which it can be seen that the cermet roller ring has a compact structure and a fine grain size of hard phase, about 1.4 μm.
The hardness of the cermet hot rolling ring prepared in this example was 75HRA and the bending strength was 850 MPa.
Example 2
TiB2Preparation of/Ti (C, N) -stainless steel metal ceramic hot rolling roll ringThe preparation method sequentially comprises the steps of material mixing, wet grinding, drying, compression molding, vacuum solid-phase sintering, machining and high-temperature liquid-phase sintering, and specifically comprises the following steps:
(1) mixing materials: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB25%, Ti (C, N): 70%, Fe: 17.965%, Ni: 2.25%, Cr: 4.5%, Mn: 0.2125%, Si: 0.055% and C: 0.0175 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding absolute ethyl alcohol accounting for 2% of the raw materials by mass as a medium, vacuumizing the ball milling tank, and filling argon, wherein the ball material mass ratio is 10: 1, ball milling rotation speed is 300r/min, and ball milling time is 10 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 70 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) compression molding: putting the dried powder into a metal mold, and performing compression molding under the pressure of 200MPa to obtain a molded blank, wherein the pressure maintaining time is 120 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, the sintering time is half an hour, and a hot rolling roll collar preform is obtained after furnace cooling;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1440 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 87HRA and the bending strength was 1400 MPa.
Example 3
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB210%, Ti (C, N): 65%, Fe: 17.965%, Ni: 2.25%, Cr: 4.5%, Mn: 0.2125%, Si: 0.055% and C: 0.0175 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 10: 1, ball milling rotation speed is 300r/min, and ball milling time is 10 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 70 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 200MPa to obtain a molded blank, wherein the pressure maintaining time is 120 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, the sintering time is half an hour, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1440 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot-rolled roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 86HRA and the bending strength was 1350 MPa.
Example 4
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB215%, Ti (C, N): 60%, Fe: 17.965%, Ni: 2.25%, Cr: 4.5%, Mn: 0.2125%, Si: 0.055% and C: 0.0175 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 10: 1, ball milling rotation speed is 300r/min, and ball milling time is 10 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 70 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 200MPa to obtain a molded blank, wherein the pressure maintaining time is 120 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, the sintering time is half an hour, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1440 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot-rolled roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 89HRA and the bending strength was 1550 MPa.
Example 5
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB 220%, Ti (C, N): 60%, Fe: 14%, Ni: 2%, Cr: 3.78%, Mn: 0.17%, Si: 0.04% and C: 0.01 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 20: 1, ball milling rotation speed is 300r/min, and ball milling time is 20 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 70 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 400MPa to obtain a die-pressed green body, wherein the pressure maintaining time is 120 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, the sintering time is half an hour, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1440 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot-rolled roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 92HRA and the bending strength was 1760 MPa.
Example 6
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB25%, Ti (C, N): 60%, Fe: 24.101%, Ni: 3.5%, Cr: 7%, Mn: 0.2975%, Si: 0.077% and C: 0.0245%;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 20: 1, ball milling rotation speed is 300r/min, and ball milling time is 20 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 70 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 400MPa to obtain a die-pressed green body, wherein the pressure maintaining time is 120 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, the sintering time is half an hour, and TiB is obtained by furnace cooling2Ti (C, N) -stainless steelA cermet hot rolling collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1450 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot-rolled roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 79HRA and the bending strength was 930 MPa.
Example 7
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB25%, Ti (C, N): 70%, Fe: 20.66%, Ni: 3%, Cr: 6%, Mn: 0.255%, Si: 0.065% and C: 0.02 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 1% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the ball material mass ratio is 5: 1, ball milling rotation speed is 150r/min, and ball milling time is 15 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 55 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 100MPa to obtain a molded blank, wherein the pressure maintaining time is 120 s;
(5) solid-phase sintering: mold for moldingThe green body is put into a vacuum sintering furnace for sintering, the sintering temperature is 800 ℃, and the vacuum degree is 10-2Pa, the sintering time is 90min, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1200 ℃, the sintering time is 1.5 hours, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 87HRA and the bending strength was 1400 MPa.
Example 8
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB23%, Ti (C, N): 62%, Fe: 24.101%, Ni: 3.5%, Cr: 7%, Mn: 0.2975%, Si: 0.077% and C: 0.0245%;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 1% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 15: 1, ball milling rotation speed is 200r/min, and ball milling time is 8 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 75 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 400MPa to obtain a die-pressed green body, wherein the pressure maintaining time is 30 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, sintering time of 10min, furnace cooling to obtain TiB2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1500 ℃, the sintering time is 0.5 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 80HRA and the bending strength was 1000 MPa.
Example 9
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB24.979%, Ti (C, N): 70%, Fe: 19.65%, Ni: 1.8%, Cr: 3.345%, Mn: 0.15%, Si: 0.058% and C: 0.018%;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 20: 1, ball milling rotation speed is 250r/min, and ball milling time is 4 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 60 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 300MPa to obtain a molded blank, wherein the pressure maintaining time is 70 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 900 deg.C and 10 deg.C-2Pa, the sintering time is 50min, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1300 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 86.5HRA and the bending strength was 1400 MPa.
Example 10
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB 21%, Ti (C, N): 59%, Fe: 29.9%, Ni: 1.8%, Cr: 8%, Mn: 0.25%, Si: 0.04% and C: 0.01 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 1% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 15: 1, ball milling rotation speed is 200r/min, and ball milling time is 8 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 75 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 400MPa to obtain a die-pressed green body, wherein the pressure maintaining time is 30 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 1000 deg.C and 10 deg.C-2Pa, sintering time of 10min, furnace cooling to obtain TiB2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to the sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1500 ℃, the sintering time is 0.5 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 75HRA and the bending strength was 800 MPa.
Example 11
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB21.53%, Ti (C, N): 79%, Fe: 14%, Ni: 2%, Cr: 3%, Mn: 0.35%, Si: 0.09% and C: 0.03 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 20: 1, ball milling rotation speed is 250r/min, and ball milling time is 4 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 60 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 300MPa to obtain a molded blank, wherein the pressure maintaining time is 70 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 900 deg.C and 10 deg.C-2Pa, the sintering time is 50min, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1300 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 92HRA and the bending strength was 1730 MPa.
Example 12
TiB2The preparation method of the/Ti (C, N) -stainless steel metal ceramic hot rolling roll collar comprises the steps of mixing, wet grinding, drying, compression molding, vacuum solid phase sintering, machining and high temperature liquid phase sintering in sequence, and specifically comprises the following steps:
(1) a material mixing step: selecting TiB with purity not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder, eachThe composition is TiB in percentage by mass24.39%, Ti (C, N): 70%, Fe: 15%, Ni: 4%, Cr: 6%, Mn: 0.15%, Si: 0.45% and C: 0.01 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 20: 1, ball milling rotation speed is 250r/min, and ball milling time is 4 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 60 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 300MPa to obtain a molded blank, wherein the pressure maintaining time is 70 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 900 deg.C and 10 deg.C-2Pa, the sintering time is 50min, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: and (3) placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1300 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain the metal ceramic hot rolling roll collar.
The hardness of the cermet hot rolling ring prepared in this example was 86HRA and the bending strength was 1370 MPa.

Claims (1)

1. A preparation method of a multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar is characterized by comprising the following steps:
(1) a material mixing step: selecting pureTiB with degree not less than 99%2Ti (C, N), Fe, Ni, Cr, Mn, Si and C powder are mixed, and the weight percentage of each component is TiB21.53%, Ti (C, N): 79%, Fe: 14%, Ni: 2%, Cr: 3%, Mn: 0.35%, Si: 0.09% and C: 0.03 percent;
(2) ball milling: putting the mixed raw materials into a ball milling tank, adding anhydrous ethanol accounting for 2% of the mass of the raw materials as a medium, vacuumizing the ball milling tank, and filling argon, wherein the mass ratio of ball materials is 20: 1, ball milling rotation speed is 250r/min, and ball milling time is 4 h;
(3) and (3) drying: placing the slurry after ball milling in a rotary evaporator, firstly vacuumizing, reducing the air pressure to 0.09MPa, starting heating and drying, wherein the drying temperature is 60 ℃, and sieving the dried powder by using a 200-mesh sieve;
(4) a compression molding step: putting the dried powder into a metal mold, and performing compression molding under the pressure of 300MPa to obtain a molded blank, wherein the pressure maintaining time is 70 s;
(5) solid-phase sintering: sintering the molded green body in a vacuum sintering furnace at 900 deg.C and 10 deg.C-2Pa, the sintering time is 50min, and TiB is obtained by furnace cooling2a/Ti (C, N) -stainless steel cermet hot roll collar preform;
(6) and (3) machining: machining the hot roll ring preform obtained by sintering by using a lathe to obtain a roll ring preform with a required size;
(7) and (3) high-temperature sintering: placing the roll collar preform obtained after the mechanical processing into a vacuum sintering furnace for high-temperature sintering, specifically, heating to 1000 ℃ from room temperature at a heating rate of 8 ℃/min, then heating to sintering temperature at a heating rate of 4 ℃/min, wherein the sintering temperature is 1300 ℃, the sintering time is 1 hour, and cooling along with the furnace after sintering to obtain a metal ceramic hot rolling roll collar;
the hardness of the metal ceramic hot rolling ring is 92HRA, and the bending strength is 1730 MPa.
CN201810254730.2A 2018-03-26 2018-03-26 Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar Active CN108486448B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810254730.2A CN108486448B (en) 2018-03-26 2018-03-26 Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810254730.2A CN108486448B (en) 2018-03-26 2018-03-26 Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar

Publications (2)

Publication Number Publication Date
CN108486448A CN108486448A (en) 2018-09-04
CN108486448B true CN108486448B (en) 2020-11-10

Family

ID=63337849

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810254730.2A Active CN108486448B (en) 2018-03-26 2018-03-26 Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar

Country Status (1)

Country Link
CN (1) CN108486448B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115044819B (en) * 2022-07-28 2022-11-18 西安稀有金属材料研究院有限公司 High-hardness in-situ reinforced iron-based composite material and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1061907C (en) * 1996-08-28 2001-02-14 邢台市特种冶金轧辊厂 Ceramic metal roll-ring
CN100382907C (en) * 2006-04-30 2008-04-23 宣化盛龙冶金设备制造厂 Hard alloy composite roll collar for high-speed wire production line and method for manufacturing the same
DE102011017594A1 (en) * 2011-04-27 2012-10-31 Siemens Aktiengesellschaft Method for producing a porous body and cell of a rechargeable oxide battery

Also Published As

Publication number Publication date
CN108486448A (en) 2018-09-04

Similar Documents

Publication Publication Date Title
CN109487141B (en) Preparation method of platy carbide solid solution toughened mixed crystal Ti (C, N) -based metal ceramic
CN108637268B (en) Method for preparing composite Ti (C, N) metal ceramic powder by microwave carbothermic reduction
CN109576545B (en) Ti (C, N) -based metal ceramic with mixed crystal structure and preparation method thereof
CN102787267A (en) Multiple boride metal ceramic based on high-entropy alloy adhesion agent and preparation method thereof
CN112647006B (en) Tungsten carbide-based hard alloy and preparation method thereof
CN109868382A (en) A kind of rare-earth element modified Mo2FeB2Based ceramic metal and preparation method thereof
CN112063905B (en) High-performance WC-WCoB-Co complex phase hard alloy and preparation method thereof
CN113122747B (en) Cu- (WC-Y) with excellent mechanical property2O3) Method for preparing composite material
CN108941546A (en) A kind of high-entropy alloy combination cubic boron nitride superhard composite material and preparation method
CN111235452A (en) Ti (C, N) -based hard alloy material and preparation method thereof
CN108546863A (en) A kind of more pivot high temperature alloys and preparation method thereof
CN104674098A (en) Cermet material based on TiCN-(Ti,M)CN core mixed structure and preparation method thereof
CN114318038A (en) Boride modified Mo2FeB2Base cermet and method for preparing same
CN114635069A (en) High-strength-toughness medium-entropy alloy binding phase Ti (C, N) -based metal ceramic and preparation method thereof
CN108486448B (en) Preparation method of multiphase titanium diboride/titanium carbonitride-stainless steel cermet hot mill roll collar
CN109053191B (en) Titanium carbonitride based cermet without binder phase and preparation method thereof
CN108411179B (en) Multiphase titanium diboride/titanium carbonitride cermet and preparation method thereof
CN108265217A (en) A kind of method for preparing -304 stainless steel metal ceramics hot-rolling mill composite material collars of Ti (C, N)
CN111778436B (en) Method for preparing WC-Y2O3 binderless hard alloy by cold pressing-hot pressing sintering
CN104388717A (en) Method for quickly preparing gradient cemented carbide by adding rare-earth elements
CN104690273A (en) Preparation process for nanometer modified Ti(C&N)-based metal ceramic cutting tool
CN104131206A (en) Titanium carbonitride-based hard alloy high-speed wire guide wheel material and preparation method thereof
CN108517449B (en) Ti (C, N) -304 stainless steel cermet and preparation process thereof
CN101307406A (en) Molybdenum free Ti(C, N)-based cermet and method for preparing same
CN111826567B (en) Alloy-reinforced titanium carbonitride-based composite material and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant