CN109576582A - A kind of high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter and preparation method thereof - Google Patents

A kind of high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter and preparation method thereof Download PDF

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CN109576582A
CN109576582A CN201811524535.3A CN201811524535A CN109576582A CN 109576582 A CN109576582 A CN 109576582A CN 201811524535 A CN201811524535 A CN 201811524535A CN 109576582 A CN109576582 A CN 109576582A
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cutter ring
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cutter
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CN109576582B (en
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王飞
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Tianjin Gang Yanhai Moral Science And Technology Ltd
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
    • 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
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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Abstract

The present invention provides a kind of high-intensitive, high-wearing feature and has both toughness cutter ring of disc cutter and preparation method thereof, the material for preparing the hobboing cutter cutter ring includes each ingredient of following weight percent: C 0.48-0.55%, Si 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus Fe, it can make that matrix is pure, proeutectoid carbide Dispersed precipitate using technical solution of the present invention, no bulk primary carbide cutter ring alloy.Under same test condition, the hardness of hobboing cutter cutter ring provided by the invention is higher by 10% than the hardness of high-carbon cutter ring, and intensity improves 20%, and wearability improves 25%, and impact flexibility and temper resistance also make moderate progress.

Description

A kind of high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter and preparation method thereof
Technical field
The invention belongs to cutter ring and machining field, in particular to a kind of high-intensitive, high-wearing feature has both toughness dish type Hobboing cutter cutter ring and preparation method thereof.
Background technique
Rock tunnel(ling) machine (shield machine or TBM) is advanced tunneling equipment, is that construction important in Tunnel Engineering is set It is standby, it is mainly used for the fields such as subway tunnel, hydraulic engineering, tunnel over strait, defence engineering and Urban Buried Pipeline Network.Work progress The middle effect of rolling using the cutter being installed on cutterhead carries out broken rock, and disk cutter circle is current most commonly used shield knife Tool, disk cutter are often run under strong extruding, large torque, thump, the high adverse circumstances worn, and are failed in constructing tunnel The components of maximum probability, dish type cutter ring dominant failure mode are as follows: abrasion, heel and toe wear, cracking, crimping etc..The mistake of cutter ring Effect directly affects construction period and construction cost.Therefore, the quality especially hardness and wearability of dish type cutter ring are proposed higher It is required that while guarantee sufficiently ductile, avoid the generation of dish type cutter ring cracking phenomena in work progress.
Domestic cutter ring of disc cutter material mainly includes 9Cr2Mo, 6Cr4W2Mo2V, 40CrNiMo, 4Cr5MoSiV1 steel Deng furthermore X50CrVMo5-1 (DIN standard) steel uses wide steel grade also as external Disc Cutter Ring Material and makes extensively at home With.Perhaps high abrasion resistance or toughness are high for these materials, but are difficult to meet the requirement to complex working condition, such as in quartz content The high high cutter ring of location rock strength is prone to wear, and is easy to cause cutter ring to crack in the location of soft or hard unevenness, therefore high rigidity, High abrasion, high-ductility alloy are of great significance for the application range and service life that improve disk cutter circle.
Chinese invention patent CN106566983B discloses high-performance flange-type hob Disc Cutter Ring Material and its production technology, system The main ingredient for making the hobboing cutter Disc Cutter Ring Material is C 0.35-0.42%, Mn 0.2-0.5%, Si 0.8-1.2%, Cr 5.0- 5.5%, Mo 1.8-2.5%, V 0.8-1.2%, Co 2.0-2.5%, Ni < 0.30%, P≤0.01%, S≤0.005% and The Fe of dosage.The hardness of the cutter ring processed with this Disc Cutter Ring Material reaches 58~60HRC, ballistic work ak14~16J/cm2, compared with H13 Steel hardness is higher and toughness also improves, and improves cutter ring service life.But Disc Cutter Ring Material described in the patent, it is easy in forging There is large-sized primary carbide and easy to crack, due to being added to expensive Co element, production work is at high cost.
Chinese invention patent CN 1670235A, discloses shield engine disk type hobbing cutter ring and its manufacturing method, manufactures the rolling The main ingredient of knife Disc Cutter Ring Material is C 0.38-0.45%, Mn 0.4-0.8%, Si 0.2-1.2%, Cr 4.0-6.0%, Mo 1.0-2.0%, V 0.8-2.0%, 0.005%≤P≤0.03%, 0.005%≤S≤0.03% and dosage Fe.The cutter ring Hardness be 55~57HRC, impact value akFor 18-20J/cm2, according to cutter ring ingredient described in the patent, easily occur in forging Large-sized primary carbide, open hardness is only 55~57HRC, and sulfur content is higher, finally will affect cutter ring of disc cutter Degree of purity, wear-resisting property and toughness.
In order to meet application of shield cutter under the conditions of severe geology, it is desirable that shield cutter ring not only hardness high abrasion but also Good toughness, the Disc Cutter Ring Material reported at present are not able to satisfy above-mentioned requirements.
Summary of the invention
In view of the above-mentioned problems, the present invention, which provides a kind of high-intensitive, high-wearing feature, has both toughness cutter ring of disc cutter and its system Preparation Method, the hobboing cutter cutter ring have high-wearing feature, high rigidity and high tenacity.
Specific technical solution of the present invention is as follows:
The present invention provides a kind of high-intensitive, high-wearing feature and has both toughness cutter ring of disc cutter, prepares the hobboing cutter cutter ring Material includes each ingredient of following weight percent: C 0.48-0.55%, Si 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus are Fe。
Further to improve, the material for preparing the hobboing cutter cutter ring includes each ingredient of following weight percent: C 0.5- 0.53%, Si 1.05-1.15%, Mn 0.25-0.3%, Cr 5.0-5.1%, Mo 1.5-1.6%, V 0.5-0.62%, Nb 0.02-0.03%, P < 0.02%, S < 0.001%, surplus Fe.
Further to improve, the material for preparing the hobboing cutter cutter ring includes each ingredient of following weight percent: C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P < 0.02%, S < 0.001%, surplus Fe.
Another aspect of the present invention provides the preparation method that a kind of high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter, This method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, high-temperature molten steel is poured into LF furnace by smelting acquisition high-temperature molten steel It is interior, according to the material and following weight percent C 0.48-0.55%, Si 0.9-1.2%, Mn for preparing the hobboing cutter cutter ring 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；Under protection of argon gas, it prevents from dissolving in atmosphere in steel Oxygen；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；Improve the solidification item of steel by control melting system Part, to reduce element segregation, reduce the defects of loose shrinkage cavity, improve ingot casting compactness；
5) it forges: will be forged by the steel ingot of electroslag remelting, obtain forging blank；
6) cutter ring forms: forging blank being processed into cutter ring blank by punching, die forging or twirl ring technique；
7) it is heat-treated: cutter ring blank shove charge is heat-treated；The type of cooling is cold/air-cooled using water cooling/mist, plays thin Change the effect of crystal grain, uniform formation；
8) nodularization degeneration processing spheroidizing: is carried out to the cutter ring blank after Overheating Treatment.
By process above, proeutectoid carbide nodularization in cutter ring can be made, be uniformly distributed, hardness height, toughness height.
Further to improve, step 1) smelting temperature is 1720-1880 DEG C.
It is further to improve, forging specifically comprises the processes of: heating temperature is 1230-1255 DEG C when forging, and starting forging temperature is 1185-1230 DEG C, 840-890 DEG C of final forging temperature, it is preferable that heating temperature is 1240-1250 DEG C when forging, and starting forging temperature is 1200-1215 DEG C, 860-880 DEG C of final forging temperature.
Further to improve, cutter ring is molding specifically comprises the processes of: forging blank is kept the temperature at 1220-1300 DEG C, It is kept the temperature at preferably 1250-1270 DEG C, after soaking time is 3-6h, is punched out and preforming, starts molding temperature It is 1200-1250 DEG C, preferably 1210-1230 DEG C, is then processed into cutter ring blank on twisting ring machine or die forging machine, it is after molding Cutter ring slab temperature is 840-870 DEG C, preferably 850-860 DEG C.
It is further to improve, heat treatment specifically comprises the processes of: cutter ring blank is fitted into high-temperature heater, in 630-720 DEG C to warm 1-2h, preferably it is warming up to 1020-1050 DEG C of heat preservation 1-2h, is then quickly cooled to warm 1-2h in 670-680 DEG C 440-500 DEG C, preferably 450-470 DEG C.
It is further to improve, spheroidizing specifically comprises the processes of: fill the cutter ring blank through Overheating Treatment in 410-450 DEG C Furnace is warming up to 870-880 DEG C of heat preservation 5-10h, with less than 25 DEG C speed slow cooling to 655-720 DEG C, preferably 680-700, and heat preservation 4-8h, then with the speed slow cooling less than 25 DEG C to 430-500 DEG C, preferably 440-460 DEG C, come out of the stove air-cooled.
Further to improve, high-intensitive, high-wearing feature provided by the invention has both the preparation side of toughness cutter ring of disc cutter Method includes the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1800 DEG C； High-temperature molten steel is poured into LF furnace, according to the material and following weight percent C 0.48-0.55% for preparing the hobboing cutter cutter ring, Si 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01- Ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium is added in 0.05%, P < 0.02%, S < 0.001%, surplus Fe, ingredient, into Row refining；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1248 DEG C when forging, and starting forging temperature is 1205 DEG C, 865 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1260 DEG C, soaking time be 4h after, be punched out and in advance at Type, starting molding temperature is 1220 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 855 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 675 DEG C to warm 1.5h, is warming up to 1035 DEG C of heat preservations Then 1.5h is quickly cooled to 460 DEG C；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 435 DEG C of shove charges, 875 DEG C of heat preservation 7h are warming up to, with 15 DEG C Speed slow cooling is come out of the stove air-cooled to 685 DEG C of heat preservation 5.5h, then with 10 DEG C of speed slow cooling to 455 DEG C.
High-intensitive, high-wearing feature provided by the present invention has both toughness cutter ring of disc cutter and preparation method thereof, has Following advantages: can make that matrix is pure, proeutectoid carbide Dispersed precipitate using technical solution of the present invention, no bulk primary carbide knife Enclose alloy.Under same test condition, the hardness of hobboing cutter cutter ring provided by the invention is higher by 10% than the hardness of high-carbon cutter ring, by force Degree improves 20%, and wearability improves 25%, and impact flexibility and temper resistance also make moderate progress.
Detailed description of the invention
Fig. 1 is the mirco structure figure that the present invention is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter；
Fig. 2 is the abrasion test that the present invention is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter；
Fig. 3 is the temper resistance test that the present invention is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter；
Fig. 4 is the v-notch impact ductility test that the present invention is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter；
Fig. 5 is the U-shaped notch impact toughness test that the present invention is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter.
Specific embodiment
Embodiment 1 is to embodiment 8
The ingredient that the preparation that various embodiments of the present invention provide is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is shown in Table 1.
Each embodiment of table 1 prepares the ingredient and weight percent (%) of hobboing cutter Disc Cutter Ring Material
The method for preparing cutter ring using the cutter ring alloy in above embodiments are as follows:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1800 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.48-0.55%, Si 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4- Ferrosilicon, manganese iron, ferrochrome, molybdenum is added in 0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus Fe, ingredient Iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1248 DEG C when forging, and starting forging temperature is 1205 DEG C, 865 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1260 DEG C, soaking time be 4h after, be punched out and in advance at Type, starting molding temperature is 1220 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 855 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 675 DEG C to warm 1.5h, is warming up to 1035 DEG C of heat preservations Then 1.5h is quickly cooled to 460 DEG C；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 435 DEG C of shove charges, 875 DEG C of heat preservation 7h are warming up to, with 15 DEG C Speed slow cooling is come out of the stove air-cooled to 685 DEG C of heat preservation 5.5h, then with 10 DEG C of speed slow cooling to 455 DEG C.
Embodiment 9
The ingredient that the preparation that the embodiment of the present invention 9 provides is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.55%, Si 0.9%, Mn 0.35%, Cr 5.3%, Mo 1.7%, V 0.4%, Nb 0.03%, P 0.009%, S 0.0006%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1720 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.55%, Si 0.9%, Mn 0.35%, Cr 5.3%, Mo 1.7%, V 0.4%, Nb 0.03%, P 0.009%, S 0.0006%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1230 DEG C when forging, and starting forging temperature is 1185 DEG C, 840 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1220 DEG C, soaking time be 6h after, be punched out and in advance at Type, starting molding temperature is 1200 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 840 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 630 DEG C to warm 2h, is warming up to 1020 DEG C of heat preservation 1h, Then it is cooled to 440 DEG C using quick；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 410 DEG C of shove charges, 870 DEG C of heat preservation 10h are warming up to, with 15 DEG C speed slow cooling is come out of the stove air-cooled to 655 DEG C of heat preservation 4h, then with 10 DEG C of speed slow cooling to 430 DEG C.
Embodiment 10
The ingredient that the preparation that the embodiment of the present invention 10 provides is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1880 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1255 DEG C when forging, and starting forging temperature is 1230 DEG C, 890 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1300 DEG C, soaking time be 3h after, be punched out and in advance at Type, starting molding temperature is 1250 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 870 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 720 DEG C to warm 1h, is warming up to 1050 DEG C of heat preservation 1h, Then it is cooled to 500 DEG C using quick；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 450 DEG C of shove charges, then heating to 880 DEG C of heat preservation 5h, with 20 DEG C of speed slow cooling are come out of the stove air-cooled to 720 DEG C of heat preservation 4h, then with 10 DEG C of speed slow cooling to 500 DEG C.
Embodiment 11
The ingredient that the preparation that the embodiment of the present invention 11 provides is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1760 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1240 DEG C when forging, and starting forging temperature is 1200 DEG C, 860 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1250 DEG C, soaking time be 4h after, be punched out and in advance at Type, starting molding temperature is 1210 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 850 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 670 DEG C to warm 1.2h, is warming up to 1030 DEG C of heat preservations Then 1.2h is quickly cooled to 450 DEG C；
8) spheroidizing: by the cutter ring blank blank through Overheating Treatment in 420 DEG C of shove charges, being warming up to 870 DEG C of heat preservation 6h, with 15 DEG C of speed slow cooling are come out of the stove air-cooled to 650 DEG C of heat preservation 5h, then with 15 DEG C of speed slow cooling to 440 DEG C.
Embodiment 12
The ingredient that the preparation that the embodiment of the present invention 12 provides is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1820 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1250 DEG C when forging, and starting forging temperature is 1215 DEG C, 880 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1270 DEG C, soaking time be 5h after, be punched out and in advance at Type, starting molding temperature is 1230 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 860 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 680 DEG C to warm 1h, is warming up to 1040 DEG C of heat preservation 1h, Then it is cooled to 470 DEG C using quick；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 440 DEG C of shove charges, then heating to 874 DEG C of heat preservation 8h, with 20 DEG C of speed slow cooling are come out of the stove air-cooled to 700 DEG C of heat preservation 6h, then with 5 DEG C of speed slow cooling to 460 DEG C.
Embodiment 13
The ingredient that the preparation that the embodiment of the present invention 13 provides is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1800 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1248 DEG C when forging, and starting forging temperature is 1205 DEG C, 865 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1260 DEG C, soaking time be 4h after, be punched out and in advance at Type, starting molding temperature is 1220 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 855 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 675 DEG C to warm 1.5h, is warming up to 1035 DEG C of heat preservations Then 1.5h is quickly cooled to 460 DEG C；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 435 DEG C of shove charges, 875 DEG C of heat preservation 7h are warming up to, with 15 DEG C Speed slow cooling is come out of the stove air-cooled to 685 DEG C of heat preservation 5.5h, then with 10 DEG C of speed slow cooling to 455 DEG C.
Reference examples 1-8
The ingredient that the preparation that each reference examples of the present invention provide is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is shown in Table 2.
Each reference examples of table 2 prepare the ingredient and weight percent (%) of hobboing cutter Disc Cutter Ring Material
The method for preparing cutter ring using the cutter ring alloy in the above reference examples are as follows:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1800 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each reference examples 0.48-0.55%, Si 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4- Ferrosilicon, manganese iron, ferrochrome, molybdenum is added in 0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus Fe, ingredient Iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1248 DEG C when forging, and starting forging temperature is 1205 DEG C, 865 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1260 DEG C, soaking time be 4h after, be punched out and in advance at Type, starting molding temperature is 1220 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 855 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 675 DEG C to warm 1.5h, is warming up to 1035 DEG C of heat preservations Then 1.5h is quickly cooled to 460 DEG C；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 435 DEG C of shove charges, 875 DEG C of heat preservation 7h are warming up to, with 15 DEG C Speed slow cooling is come out of the stove air-cooled to 685 DEG C of heat preservation 5.5h, then with 10 DEG C of speed slow cooling to 455 DEG C.
Reference examples 9
The ingredient that the preparation that reference examples 9 of the present invention provide is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1700 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1220 DEG C when forging, and starting forging temperature is 1180 DEG C, 900 DEG C of acquisition forging blanks of final forging temperature；
5) cutter ring form: forging blank is kept the temperature at 1210 DEG C, soaking time be 5h after, be punched out and in advance at Type, starting molding temperature is 1180 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 880 DEG C；
6) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 620 DEG C to warm 1.5h, is warming up to 1000 DEG C of heat preservations Then 2h is quickly cooled to 430 DEG C；
7) spheroidizing: by the cutter ring blank through Overheating Treatment in 400 DEG C of shove charges, 890 DEG C of heat preservation 7.5h are warming up to, with 50 DEG C speed slow cooling is come out of the stove air-cooled to 650 DEG C of heat preservation 6h, then with 30 DEG C of speed slow cooling to 420 DEG C.
Reference examples 10
The ingredient that the preparation that reference examples 10 of the present invention provide is high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter material And the weight percent of each ingredient is as follows:
C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe.
High-intensitive, high-wearing feature have both toughness cutter ring of disc cutter the preparation method comprises the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1900 DEG C； High-temperature molten steel is poured into LF furnace, the material and following weight percent C of the hobboing cutter cutter ring are prepared according to each embodiment 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P 0.009%, S 0.0001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1260 DEG C when forging, and starting forging temperature is 1240 DEG C, 830 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring form: forging blank is kept the temperature at 1310 DEG C, soaking time be 5h after, be punched out and in advance at Type, starting molding temperature is 1260 DEG C, is then processed into cutter ring blank, cutter ring hair after molding on twisting ring machine or die forging machine Base temperature is 830 DEG C；
7) spheroidizing: by the cutter ring blank through Overheating Treatment in 460 DEG C of shove charges, 860 DEG C of heat preservation 7.5h are warming up to, with 30 DEG C speed slow cooling is come out of the stove air-cooled to 730 DEG C of heat preservation 6h, then with 40 DEG C of speed slow cooling to 510 DEG C.
High-intensitive, high-wearing feature has both the investigation of toughness cutter ring of disc cutter mechanical property
1 mirco structure of test example
From figure 1 it appears that high-intensitive, high-wearing feature provided by the invention has both toughness cutter ring of disc cutter segregation base This elimination, fine microstructures are uniform, on matrix Dispersed precipitate short grained carbide.
The investigation of 2 wearability of test example
Using rubber foot wheel abrasion tester carry out wear test, comparing embodiment 1-13, reference examples 1-10 hobboing cutter cutter ring, The wearability of H13 fashioned iron and X50CrVMo5-1.Test result is shown in Fig. 2.
From figure 2 it can be seen that hobboing cutter cutter ring provided by the invention has extraordinary wearability.
The investigation of 3 temper resistance of test example
Example 1-13, the hobboing cutter cutter ring of reference examples 1-10, H13 fashioned iron and X50CrVMo5-1 are placed in 620 DEG C, survey each The hardness number (HRC) of sample, testing result is shown in Fig. 3.
From figure 3, it can be seen that the hardness that the present invention provides hobboing cutter cutter ring significantly improves, hardness number (HRC) reaches 57.5- 63.6。
The investigation of 4 impact flexibility of test example
Example 1-13, the hobboing cutter cutter ring of reference examples 1-10, H13 fashioned iron and X50CrVMo5-1 carry out " V-type " notch Impact test, test result are shown in Fig. 4.
Figure 4, it is seen that the toughness of hobboing cutter cutter ring provided by the invention significantly improves, impact flexibility Akv reaches 6.3-11.8J/cm2。
Example 1-13, the hobboing cutter cutter ring of reference examples 1-10, H13 fashioned iron and X50CrVMo5-1 carry out " U-shaped " notch Impact test, test result are shown in Fig. 5.
From figure 5 it can be seen that the toughness of hobboing cutter cutter ring provided by the invention significantly improves, impact flexibility Aku reaches 18.7-28.9J/cm2。
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the scope of the present invention into Row limits, and without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention Various changes and improvements out, should fall within the scope of protection determined by the claims of the present invention.

Claims (10)

1. a kind of high-intensitive, high-wearing feature has both toughness cutter ring of disc cutter, which is characterized in that prepare the material of the hobboing cutter cutter ring Material includes each ingredient of following weight percent: C 0.48-0.55%, Si 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8- 5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus Fe.
2. high-intensitive, high-wearing feature according to claim 1 has both toughness cutter ring of disc cutter, which is characterized in that preparation The material of the hobboing cutter cutter ring includes each ingredient of following weight percent: C 0.5-0.53%, Si 1.05-1.15%, Mn 0.25-0.3%, Cr 5.0-5.1%, Mo 1.5-1.6%, V 0.5-0.62%, Nb 0.02-0.03%, P < 0.01%, S < 0.0005%, surplus Fe.
3. high-intensitive, high-wearing feature according to claim 2 has both toughness cutter ring of disc cutter, which is characterized in that preparation The material of the hobboing cutter cutter ring includes each ingredient of following weight percent: C 0.52%, Si 1.1%, Mn 0.27%, Cr 5.1%, Mo 1.55%, V 0.55%, Nb 0.03%, P < 0.005%, S < 0.0002%, surplus Fe.
4. a kind of high-intensitive, high-wearing feature described in claim 1 has both the preparation method of toughness cutter ring of disc cutter, feature It is, the preparation method includes the following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel pours into high-temperature molten steel in LF furnace, According to the material and following weight percent C 0.48-0.55%, Si 0.9-1.2%, Mn 0.2- for preparing the hobboing cutter cutter ring 0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01-0.05%, P < 0.02%, S < 0.001%, surplus Fe, ingredient are added ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium, are refined；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, obtain forging blank；
6) cutter ring forms: forging blank being processed into cutter ring blank by punching, die forging or twirl ring technique；
7) it is heat-treated: cutter ring blank shove charge is heat-treated；
8) nodularization degeneration processing spheroidizing: is carried out to the cutter ring blank after Overheating Treatment.
5. the preparation method according to claim 4, which is characterized in that step 1) smelting temperature is 1720-1880 DEG C.
6. preparation method according to claim 5, which is characterized in that forging specifically comprises the processes of: heating temperature when forging It is 1230-1255 DEG C, starting forging temperature is 1185-1230 DEG C, 840-890 DEG C of final forging temperature, it is preferable that heating temperature is when forging 1240-1250 DEG C, starting forging temperature is 1200-1215 DEG C, 860-880 DEG C of final forging temperature.
7. preparation method as claimed in claim 6, which is characterized in that cutter ring is molding specifically comprises the processes of: forging blank exists Kept the temperature at 1220-1300 DEG C, kept the temperature at preferably 1250-1270 DEG C, soaking time be 3-6h after, be punched out and Preforming, starting molding temperature is 1200-1250 DEG C, preferably 1210-1230 DEG C, is then added on twisting ring machine or die forging machine For work at cutter ring blank, cutter ring slab temperature after molding is 840-870 DEG C, preferably 850-860 DEG C.
8. preparation method as claimed in claim 7, which is characterized in that heat treatment specifically comprises the processes of: cutter ring blank to be packed into In high-temperature heater, in 630-720 DEG C to warm 1-2h, 1020-1050 DEG C preferably is warming up to warm 1-2h in 670-680 DEG C 1-2h is kept the temperature, 440-500 DEG C, preferably 450-470 DEG C are then quickly cooled to.
9. preparation method as claimed in claim 8, which is characterized in that spheroidizing specifically comprises the processes of: will be through Overheating Treatment Cutter ring blank in 410-450 DEG C of shove charge, 870-880 DEG C of heat preservation 5-10h is warming up to, with less than 25 DEG C speed slow cooling to 655- 720 DEG C, preferably 680-700 keep the temperature 4-8h, then with the speed slow cooling less than 25 DEG C to 430-500 DEG C, preferably 440-460 DEG C, it comes out of the stove air-cooled.
10. preparation method as claimed in claim 9, which is characterized in that described method includes following steps:
1) refine: by scrap iron or iron block investment electric arc furnaces, smelting acquisition high-temperature molten steel, smelting temperature is 1800 DEG C；It will be high Warm molten steel pours into LF furnace, according to the material and following weight percent C 0.48-0.55%, Si for preparing the hobboing cutter cutter ring 0.9-1.2%, Mn 0.2-0.37%, Cr 4.8-5.3%, Mo 1.45-1.7%, V 0.4-0.7%, Nb 0.01- Ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron and ferro-niobium is added in 0.05%, P < 0.02%, S < 0.001%, surplus Fe, ingredient, into Row refining；
2) it deaerates: being de-gassed by VD furnace；
3) it is poured: being poured under protection of argon gas, form steel ingot；
4) electroslag remelting: by steel ingot electroslag remelting under protection of argon gas；
5) it forges: will be forged by the steel ingot of electroslag remelting, heating temperature is 1248 DEG C when forging, starting forging temperature 1205 DEG C, 865 DEG C of acquisition forging blanks of final forging temperature；
6) cutter ring forms: forging blank is kept the temperature at 1260 DEG C, after soaking time is 4h, is punched out and preforming, Starting molding temperature is 1220 DEG C, is then processed into cutter ring blank, cutter ring blank after molding on twisting ring machine or die forging machine Temperature is 855 DEG C；
7) it is heat-treated: cutter ring blank being fitted into high-temperature heater, in 675 DEG C to warm 1.5h, is warming up to 1035 DEG C of heat preservation 1.5h, Then quickly it is cooled to 460 DEG C；
8) spheroidizing: by the cutter ring blank through Overheating Treatment in 435 DEG C of shove charges, 875 DEG C of heat preservation 7h are warming up to, with 15 DEG C of speed Slow cooling is come out of the stove air-cooled to 685 DEG C of heat preservation 5.5h, then with 10 DEG C of speed slow cooling to 455 DEG C.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111235481A (en) * 2020-01-21 2020-06-05 广东达济科技有限公司 Casting alloy for plastic mold and preparation method thereof
CN113667893A (en) * 2021-08-10 2021-11-19 北京科技大学 Wear-resistant TBM cutter ring and preparation method and application thereof
CN115821160A (en) * 2022-12-09 2023-03-21 株洲中车天力锻业有限公司 Hard rock TBM shield cutter ring material and preparation process thereof
CN117051330A (en) * 2023-08-04 2023-11-14 威海天润新材料科技有限公司 Steel for tunnel excavator hob ring for extremely hard rock and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108728756A (en) * 2018-06-30 2018-11-02 中铁工程装备集团隧道设备制造有限公司 A kind of high-performance hobboing cutter Disc Cutter Ring Material and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108728756A (en) * 2018-06-30 2018-11-02 中铁工程装备集团隧道设备制造有限公司 A kind of high-performance hobboing cutter Disc Cutter Ring Material and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111235481A (en) * 2020-01-21 2020-06-05 广东达济科技有限公司 Casting alloy for plastic mold and preparation method thereof
CN113667893A (en) * 2021-08-10 2021-11-19 北京科技大学 Wear-resistant TBM cutter ring and preparation method and application thereof
CN115821160A (en) * 2022-12-09 2023-03-21 株洲中车天力锻业有限公司 Hard rock TBM shield cutter ring material and preparation process thereof
CN115821160B (en) * 2022-12-09 2024-02-13 株洲中车天力锻业有限公司 Hard rock TBM shield cutter ring material and preparation process thereof
CN117051330A (en) * 2023-08-04 2023-11-14 威海天润新材料科技有限公司 Steel for tunnel excavator hob ring for extremely hard rock and preparation method thereof

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