CN109082503A - A kind of gradient hardness hobboing cutter cutter ring manufacture craft - Google Patents
A kind of gradient hardness hobboing cutter cutter ring manufacture craft Download PDFInfo
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- CN109082503A CN109082503A CN201810864693.7A CN201810864693A CN109082503A CN 109082503 A CN109082503 A CN 109082503A CN 201810864693 A CN201810864693 A CN 201810864693A CN 109082503 A CN109082503 A CN 109082503A
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- cutter ring
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
- C23C8/38—Treatment of ferrous surfaces
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- Y02P10/25—Process efficiency
Abstract
A kind of gradient hardness hobboing cutter cutter ring manufacture craft, includes the following steps, the molding of cutter ring blank forging；Roughing forms cutter ring crude green body；Vacuum hardening processing；Cryogenic technology processing；Nitrogen treatment；Tempering；Inner hole sensing processing；Destressing processing；Finishing, is eventually fabricated hobboing cutter cutter ring finished product.The material composition design of cutter ring of the invention is ledeburite steel, improves the carbon content of steel to guarantee that cutter ring has high rigidity and high-wearing feature；Molybdenum refinement crystal grain is improved, increases toughness and reduces steel belt roof bolt brittleness；It mentions high-Cr and increases harden ability；It adds silicon and improves temper resistance；Increase vanadium and further increases toughness to refine crystal grain.The present invention substantially increases fatigue resistance, hardness, wearability, corrosion resistance and the chemical stability of hobboing cutter cutter ring, extends the service life of hobboing cutter cutter ring, obtains hardness into the cutter ring of gradient distribution, is adapted to the driving of soft lower hard formation.
Description
Technical field
The present invention relates to a kind of shield machine excavation work technical fields, and in particular to a kind of gradient hardness hobboing cutter cutter ring production
Technique.
Background technique
In underground engineering field, shield construction using more and more extensive.Shield machine in underground engineering is bulky,
Weight is big, and underground activities space is limited, and cutter head of shield machine rotation drives various cutters thereon to complete the excavation to the soil body when work.
Shield cutter is the part directly with landwaste, rock contact, it is easy to wear and need in time replacement.The quality of hobboing cutter directly influences
The cutting effect and driving speed of shield machine.The work edge of hobboing cutter is hobboing cutter cutter ring, the frictional force being subject at work, shearing force
Quite big with impact force, the damage mode of cutter ring mainly has premature abrasion, tipping, fracture.Especially for upper-soft lower-hard ground
When tunneling, the phenomenon that fracture of hobboing cutter cutter ring and premature abrasion, more protrudes.
Summary of the invention
The present invention provides a kind of gradient hardness hobboing cutter cutter ring manufacture craft to solve shortcoming in the prior art,
The shock resistance for not reducing cutter ring center portion while the wearability on cutter ring surface can be improved in it is adapted in soft lower hard formation
Driving.
In order to solve the above technical problems, the present invention adopts the following technical scheme: a kind of gradient hardness hobboing cutter cutter ring makes work
Skill includes the following steps,
(1), cutter ring blank forging forms；
(2), roughing forms cutter ring crude green body；
(3), vacuum hardening is handled；
(4), cryogenic technology is handled；
(5), nitrogen treatment；
(6), tempering；
(7), inner hole sensing processing；
(8), destressing is handled；
(9), it finishes, is eventually fabricated hobboing cutter cutter ring finished product, hobboing cutter cutter ring hardness is radially at gradient distribution, i.e. hobboing cutter knife
Sword region HRC61~64, arc area surface HRC57~59, HRC50~57 inside arc area, step surface region with
Cutter ring inner hole HRC42~46.
The ingredient and mass percent of cutter ring blank in step (1) are as follows: C is that 1.20~1.50%, Si is 0.40~0.60%,
It is 6.80~7.70%, Mo be 2.0~2.4%, V is 0.4~0.6%, Fe surplus that Mn, which is 0.3~0.65%, Cr,；Impurity P≤
0.01%, S≤0.02%.
The detailed process of step (3) vacuum hardening processing is, by cutter ring crude green body under vacuum conditions with < 150 DEG C/h speed
It is heated to 650-700 DEG C from room temperature, keeps the temperature 1h, then cutter ring crude green body is heated to 870-900 DEG C with < 120 DEG C/h speed, heat preservation
1h then continues to be warming up to 1050 ± 20 DEG C of heat preservation 1h, and vacuum hardening is finally cooled to 60 DEG C or less.
The detailed process of step (4) cryogenic technology processing is, in such a way that liquid nitrogen is cooling, cooling minimum temperature is-
150 DEG C, cutter ring crude green body is cooled to -150 DEG C from room temperature with < 30 DEG C/h speed, keeps the temperature 1h under -150 DEG C of states.
The detailed process of step (5) nitrogen treatment is that use is plasma nitrided, 520-550 DEG C of nitriding temperature, in 520-
550 DEG C of heat preservation 4-6h.
The detailed process of step (6) tempering is, in 540 ± 20 DEG C of progress first time tempering, to keep the temperature 3h；Again 515
± 20 DEG C carry out second and are tempered, and keep the temperature 3h.
The detailed process of step (7) inner hole sensing processing is to extend into the thick embryo inner hole areas of cutter ring using induction coil and add
Heat, induction heating control thick 700 ± 20 DEG C of embryo inner hole temperature of cutter ring, and heating time 3~10 minutes, natural cooling in air,
Wherein induction coil is circular coil.
The detailed process of step (8) destressing processing is that destressing is handled in atmosphere protection stove, 220 ± 20 DEG C of temperature,
Tempering time 1~2 hour.
By adopting the above technical scheme, the present invention have following originality and the utility model has the advantages that
After vacuum hardening, the hardness of hobboing cutter cutter ring be can be improved up to HRC61-64 by using cryogenic technology to hobboing cutter cutter ring
Austenite effectively reduces the content of retained austenite in cutter ring crude green body tissue to the transformation efficiency of martensite.Using nitriding process
When, nitrided iron be constantly adsorbed on cutter ring crude green body surface and to spreading inside cutter ring crude green body, improve cutter ring crude green body circumferential surface
Wearability and anti-fatigue performance.
By handling cutter ring crude green body inner hole areas induction tempering, and cutter ring crude green body inner hole and step surface zone hardness are lowered
For HRC42-46, cutter ring blade is not influenced by induction tempering processing, it is ensured that the wearability and solid hob knife of hobboing cutter blade
The probability of hobboing cutter cutter ring fracture can be greatly reduced in the impact flexibility of circle.
In conclusion the material composition design of cutter ring of the invention is ledeburite steel, the carbon content of steel is improved to guarantee knife
Circle has high rigidity and high-wearing feature；Molybdenum refinement crystal grain is improved, increases toughness and reduces steel belt roof bolt brittleness；Propose high-Cr increasing
Add harden ability；It adds silicon and improves temper resistance；Increase vanadium and further increases toughness to refine crystal grain.The present invention sufficiently improves
Fatigue resistance, hardness, wearability, corrosion resistance and the chemical stability of hobboing cutter cutter ring, extend hobboing cutter cutter ring uses the longevity
Life obtains hardness into the cutter ring of gradient distribution, is adapted to the driving of soft lower hard formation.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Appended drawing reference 1 is hobboing cutter blade, and 2 be arc area, and 3 be cutter ring inner hole.
Specific embodiment
A kind of gradient hardness hobboing cutter cutter ring manufacture craft of the invention, includes the following steps,
(1), cutter ring blank forging forms；
(2), roughing forms cutter ring crude green body；
(3), vacuum hardening is handled；
(4), cryogenic technology is handled；
(5), nitrogen treatment；
(6), tempering；
(7), inner hole sensing processing；
(8), destressing is handled；
(9), it finishes, is eventually fabricated hobboing cutter cutter ring finished product, as shown in Figure 1, hobboing cutter cutter ring hardness is radially at gradient point
Cloth, i.e. 1 region HRC61~64 of hobboing cutter blade, 2 surface HRC57~59 of arc area, 2 inside HRC50 of arc area~
57, step surface region and cutter ring inner hole 3HRC42~46.
The ingredient and mass percent of cutter ring blank in step (1) are as follows: C 1.0%, Si 0.9%, Mn 0.4%, Cr are
7%, Mo 2.2%, V 1.8%, Fe surplus；Impurity P≤0.01%, S≤0.02%.
Step (3) vacuum hardening processing detailed process be, by cutter ring crude green body under vacuum conditions with 130 DEG C/h speed from
Room temperature is heated to 680 DEG C, keeps the temperature 1h, then cutter ring crude green body is heated to 880 DEG C with 100 DEG C/h speed, keeps the temperature 1h, then continue to rise
Temperature to 1050 DEG C of heat preservation 1h, vacuum hardening is finally cooled to 60 DEG C or less.
The detailed process of step (4) cryogenic technology processing is, in such a way that liquid nitrogen is cooling, cooling minimum temperature is-
150 DEG C, cutter ring crude green body is cooled to -150 DEG C from room temperature with 15 DEG C/h speed, keeps the temperature 1h under -150 DEG C of states.
The detailed process of step (5) nitrogen treatment is that use is plasma nitrided, 530 DEG C of nitriding temperature, is kept the temperature at 530 DEG C
4-6h。
The detailed process of step (6) tempering is, in 540 DEG C of progress first time tempering, to keep the temperature 3h；Again 515 DEG C into
Second of tempering of row, keeps the temperature 3h.
The detailed process of step (7) inner hole sensing processing is to extend into the thick embryo inner hole areas of cutter ring using induction coil and add
Heat, induction heating control thick 700 DEG C of embryo inner hole temperature of cutter ring, and heating time 8 minutes, natural cooling in air, wherein incuding
Coil is circular coil.
The detailed process of step (8) destressing processing is that destressing is handled in atmosphere protection stove, 220 DEG C of temperature, tempering
Time 1.5 hours.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (8)
1. a kind of gradient hardness hobboing cutter cutter ring manufacture craft, it is characterised in that: include the following steps,
(1), cutter ring blank forging forms；
(2), roughing forms cutter ring crude green body；
(3), vacuum hardening is handled；
(4), cryogenic technology is handled；
(5), nitrogen treatment；
(6), tempering；
(7), inner hole sensing processing；
(8), destressing is handled；
(9), it finishes, is eventually fabricated hobboing cutter cutter ring finished product, hobboing cutter cutter ring hardness is radially at gradient distribution, i.e. hobboing cutter knife
Sword region HRC61~64, arc area surface HRC57~59, HRC50~57 inside arc area, step surface region with
Cutter ring inner hole HRC42~46.
2. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1, it is characterised in that: knife in step (1)
Enclose the ingredient and mass percent of blank are as follows: it be 0.40~0.60%, Mn is that 0.3~0.65%, Cr is that C, which is 1.20~1.50%, Si,
6.80~7.70%, Mo are that 2.0~2.4%, V is 0.4~0.6%, Fe surplus；Impurity P≤0.01%, S≤0.02%.
3. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1 or 2, it is characterised in that: step (3) is true
The detailed process of sky quenching treatment is that cutter ring crude green body is heated to 650- from room temperature with < 150 DEG C/h speed under vacuum conditions
700 DEG C, 1h is kept the temperature, then cutter ring crude green body is heated to 870-900 DEG C with < 120 DEG C/h speed, keep the temperature 1h, then continue to be warming up to
1050 ± 20 DEG C of heat preservation 1h, vacuum hardening are finally cooled to 60 DEG C or less.
4. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1 or 2, it is characterised in that: step (4) is deep
The detailed process of cold process is, in such a way that liquid nitrogen is cooling, cooling minimum temperature is -150 DEG C, by cutter ring crude green body with
< 30 DEG C/h speed is cooled to -150 DEG C from room temperature, keeps the temperature 1h under -150 DEG C of states.
5. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1 or 2, it is characterised in that: step (5) nitrogen
The detailed process for changing processing is that use is plasma nitrided, 520-550 DEG C of nitriding temperature, in 520-550 DEG C of heat preservation 4-6h.
6. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1 or 2, it is characterised in that: step (6) is returned
The detailed process of fire processing is, in 540 ± 20 DEG C of progress first time tempering, to keep the temperature 3h；It is carried out second time at 515 ± 20 DEG C again
Fire keeps the temperature 3h.
7. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1 or 2, it is characterised in that: in step (7)
The detailed process of hole sensing processing is to extend into the thick embryo inner hole areas of cutter ring using induction coil and heat, induction heating controls knife
Enclose thick 700 ± 20 DEG C of embryo inner hole temperature, heating time 3~10 minutes, natural cooling in air, wherein induction coil was circle
Coil.
8. a kind of gradient hardness hobboing cutter cutter ring manufacture craft according to claim 1 or 2, it is characterised in that: step (8) is gone
The detailed process of stress processing is that destressing is handled in atmosphere protection stove, 220 ± 20 DEG C of temperature, tempering time 1~2 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810864693.7A CN109082503A (en) | 2018-08-01 | 2018-08-01 | A kind of gradient hardness hobboing cutter cutter ring manufacture craft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810864693.7A CN109082503A (en) | 2018-08-01 | 2018-08-01 | A kind of gradient hardness hobboing cutter cutter ring manufacture craft |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517966A (en) * | 2019-01-15 | 2019-03-26 | 常德市中天精密工具有限公司 | A kind of heat treatment method of break bar cutter ring |
| CN109913633A (en) * | 2019-03-27 | 2019-06-21 | 刘辉 | A kind of heat treatment process of screwdriver bit production |
| CN110231238A (en) * | 2019-05-30 | 2019-09-13 | 吉林省维尔特隧道装备有限公司 | The gradient rigidity detection device and method in development machine hobboing cutter cutter ring section |
| CN110257616A (en) * | 2019-06-25 | 2019-09-20 | 葫芦岛力天重工机械有限公司 | A kind of rock tunnel(ling) machine heavy duty hobboing cutter cutter ring |
| CN112646956A (en) * | 2020-12-17 | 2021-04-13 | 江苏大学 | Wear-resistant shield tunneling machine hard rock cutter ring and preparation method and application thereof |
| RU2757362C1 (en) * | 2021-03-11 | 2021-10-14 | федеральное государственное бюджетное образовательное учреждение высшего образования «Уфимский государственный авиационный технический университет» | Method for combined processing of products from fast cutting steel |
| RU2760515C1 (en) * | 2021-02-24 | 2021-11-25 | федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный авиационный технический университет" | Method for combined processing of products from fast cutting steel |
| CN115226515A (en) * | 2022-08-04 | 2022-10-25 | 青岛征和工业股份有限公司 | Saw chain cutter tooth and preparation process |
| CN115522138A (en) * | 2022-10-27 | 2022-12-27 | 神拓科技有限公司 | Preparation process of high-strength shield tunneling machine hobbing cutter ring |
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