CN108559922B - A kind of rock tunnel(ling) machine hobboing cutter cutter ring alloy material and preparation method thereof - Google Patents
A kind of rock tunnel(ling) machine hobboing cutter cutter ring alloy material and preparation method thereof Download PDFInfo
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- 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
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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Abstract
The present invention provides a kind of TBM hob cutter ring alloy material and preparation method thereof, based on mass content, comprising: C 0.70~0.90%, Si 1.01~2.00%, Mn 1.01~2.00%, Cr 2.00~3.00%, Mo 1.50~2.00%, Ni 1.01~2.00%, V 0.80~1.50%, the Fe of Nb 0.10~0.40, S≤0.03%, P≤0.03% and surplus.TBM hob cutter ring alloy material provided by the invention promotes mechanical property and significantly improves the intensity of alloy material under the premise of meeting tough performance requirement by the alloying cooperation of the elements such as Mn, Si, Cr, Ni, Mo, V.Embodiment the result shows that, TBM hob cutter ring alloy material HRC hardness provided by the invention be 59~62, impact flexibility (ak) it is 6~10J/cm2。
Description
Technical field
The present invention relates to technical field of metal material, in particular to a kind of rock tunnel(ling) machine hobboing cutter cutter ring alloy material and its
Preparation method.
Background technique
With increasing, the rock tunnel(ling) machine of railway, the construction of hydraulic engineering major long tunnel and subway work project
The application of (Tunnelboring machine, hereinafter referred to as TBM) is also increasingly extensive.The driving of TBM is led to certain thrust
The cutter ring for crossing the disk cutter (hereinafter referred to as hobboing cutter) of installation at the front of the knife plate forms rolling extrusion to rock and realizes broken rock.Cause
In the tunneling process of TBM, the abrasion of hobboing cutter cutter ring is the most main for this.
The design and manufacturing technology of TBM hob is one of core technology of TBM, meanwhile, TBM construction in cutter inspection, replacement,
The non-cutting times such as maintenance and cutter consumption costs account for the significant proportion of TBM construction total time and total cost of constructing.Under normal circumstances,
TBM construction work cutter consumption costs accounts for about a quarter of project cost to 1/5th, when geological conditions is bad, in addition it is high
Up to one third or so.The ratio of cutter changing time Zhan total construction time is up to 4%~26%.Therefore, in TBM work progress
Tool quality is to restrict the primary factor of drivage efficiency, and reduce the critical issue of TBM construction cost.
Hobboing cutter is made of axis, end cap, floating seal, bearing, cutter ring, ring washer, cutter hub, pressing plate, refueling bolt etc., wherein knife
Circle is one of key component of cutter.Hobboing cutter will bear huge load and impact, violent friction and high temperature in broken rock, and each zero
Part especially cutter ring surface is worn.
Hobboing cutter Disc Cutter Ring Material comparative maturity is German WIRTH company, Hai Ruike company and the production of ROBBINS company, the U.S.
Hobboing cutter cutter ring.The mode of existing hobboing cutter cutter ring multi-pass over carburizing processing forms one layer of high rigidity carburizing on alloy material surface layer
Layer, so as to improve the hardness of hobboing cutter cutter ring.But the thinner thickness of carburized layer, it is still difficult to meet the big abrasion loss of hobboing cutter cutter ring
It is required that.
Summary of the invention
In view of this, the present invention provides a kind of TBM hob cutter ring alloy materials and preparation method thereof.The present invention is prepared into
The hobboing cutter cutter ring alloy material hardness arrived is high, and good toughness, facilitates the service life for extending hobboing cutter cutter ring.
In order to reach the goals above, the present invention provides following technical schemes:
The present invention provides a kind of rock tunnel(ling) machine hobboing cutter cutter ring alloy materials, based on mass content, comprising: and C 0.70~
0.90%, Si 1.01~2.00%, Mn 1.01~2.00%, Cr 2.00~3.00%, Mo 1.50~2.00%, Ni
The Fe of 1.01~2.00%, V 0.80~1.50%, Nb 0.10~0.40, S≤0.03%, P≤0.03% and surplus.
Preferably, the tissue of the rock tunnel(ling) machine hobboing cutter cutter ring alloy material be tempered martensite and precipitate, it is described
Precipitate contains the carbide of the carbide of niobium, the carbide of molybdenum and vanadium.
Preferably, the crystallite dimension of the rock tunnel(ling) machine hobboing cutter cutter ring alloy material is 80~120 μm.
The present invention provides the preparation method of the rock tunnel(ling) machine hobboing cutter cutter ring alloy material described in above-mentioned technical proposal,
It is characterized in that, comprising the following steps:
(1) it will be cast after alloy raw material melting, obtain cartridge type casting；
(2) the cartridge type casting that the step (1) obtains is forged, obtains just base；
(3) the first base that the step (2) obtains is annealed, obtain annealing just base；
(4) just base carries out roughing for the annealing for obtaining the step (3), obtains first product；
(5) first product that the step (4) obtains successively is quenched and is tempered, obtain the conjunction of rock tunnel(ling) machine hobboing cutter cutter ring
Golden material.
Preferably, the temperature of melting is 1600~1650 DEG C in the step (1), and the mode of melting is electro-smelting.
Preferably, the starting forging temperature forged in the step (2) is 990~1040 DEG C, and the final forging temperature of forging is at 900 DEG C
More than, the forging ratio of forging is 1.5 or more.
Preferably, before step (2) forging, the cartridge type casting is subjected to isothermal holding；The temperature of the heat preservation is
1090~1140 DEG C, the time of heat preservation is 5~6h.
Preferably, annealing includes the first annealing and the second annealing successively carried out in the step (3)；First annealing
Temperature be 850~860 DEG C, first annealing time be 3.9~4.1h；The temperature of second annealing is 715~725 DEG C,
The time of second annealing is 1.9~2.1h.
Preferably, the temperature quenched in the step (5) is 1030~1090 DEG C, and the time of quenching is 8~10h.
Preferably, the temperature being tempered in the step (5) is 450~580 DEG C, and the time of tempering is 5~6h.
Rock tunnel(ling) machine hobboing cutter cutter ring alloy material provided by the invention, based on mass content, comprising: C 0.70~
0.90%, Si 1.01~2.00%, Mn 1.01~2.00%, Cr 2.00~3.00%, Mo 1.50~2.00%, Ni
The Fe of 1.01~2.00%, V 0.80~1.50%, Nb 0.10~0.40, S≤0.03%, P≤0.03% and surplus.This hair
For the TBM hob cutter ring alloy material of bright offer by the cooperation of the elements such as C, Mn, Si, Cr, Ni, Mo, V, Nb, less is tiny
The carbide dispersion of niobium, molybdenum and vanadium is distributed on martensitic matrix, is conducive to the toughness for promoting material；And higher Mo and V contain
Amount, ensure that material hardness with higher under the heat treatment process taken, and then under the premise of meeting hardness requirement,
Significantly improve the toughness of alloy material.
Preparation method provided by the invention by forging the heat treatment mode of binding operation simplicity, (return again by annealing-quenching-
Fire), regulate and control phase transition process, refines crystal grain, obtain tempered martensite, while a small amount of carbide is precipitated, further increase TBM
The intensity and toughness of hobboing cutter cutter ring alloy material.
Embodiment the result shows that, TBM hob cutter ring alloy material HRC hardness provided by the invention be 59~62, impact
Toughness (ak) it is 6~10J/cm2；Hobboing cutter cutter ring provided by the invention compared to tradition Wirth cutter ring service life raising 20% with
On.
Detailed description of the invention
Fig. 1 is the optics metallograph of embodiment 1TBM hobboing cutter cutter ring alloy material；
Fig. 2 is the stereoscan photograph of embodiment 1TBM hobboing cutter cutter ring alloy material；
Fig. 3 is the point analysis for the carbide being precipitated in Fig. 2.
Specific embodiment
The present invention provides a kind of TBM hob cutter ring alloy materials, based on mass content, comprising: C 0.70~0.90%,
Si 1.01~2.00%, Mn 1.01~2.00%, Cr 2.00~3.00%, Mo 1.50~2.00%, Ni 1.01~
The Fe of 2.00%, V 0.80~1.50%, Nb 0.10~0.40, S≤0.03%, P≤0.03% and surplus.
In terms of mass content, TBM hob cutter ring alloy material provided by the invention includes C 0.70~0.90%, preferably
0.72~0.83%, more preferably 0.75~0.80%.In the present invention, the C content can guarantee that matrix microscopic structure is
Martensitic structure, while a small amount of Dispersed precipitate carbide (percentage by volume about 4%), and then guarantee while improving hardness
Good plasticity and toughness.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention include Si 1.01~
2.00%, preferably 1.19~1.8%, further preferably 1.33~1.55%.In the present invention, the Si can promote geneva
The formation of body, and play the role of solution strengthening.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention further includes Mn 1.01
~2.00%, preferably 1.21~1.9%, further preferably 1.41~1.62%.In the present invention, the Mn content can be with
Improve the intensity and toughness of steel；And manganese can promote the dissolution of V, improve the solid solution strengthening effect of V, and low in cost.
In the present invention, the cooperative reinforcing effect of the Mn and Si can partially substitute traditional Cr, Mo and be strengthened.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention include Cr 2.00~
3.00%, preferably 2.21~2.8%, further preferably 2.31~2.52%.In the present invention, the Cr can increase steel
Harden ability, while refining crystal grain, improve the intensity of steel；Although the present invention contains certain Cr element, due to Cr content
Lower, C element preferentially forms carbide, and the carbide of not formed Cr with elements such as Mo, Nb and V, improves the shape of carbide
State, this is advantageous the toughness for improving material.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention include Mo 1.50~
2.00%, preferably 1.52~1.81%, further preferably 1.55~1.62%.In the present invention, the Mo and C forms carbon
Compound, and the intensity of steel is helped to improve, temper resistance is improved, improves temper brittleness, guarantees hardness of the invention.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention include Ni 1.01~
2.00%, preferably 1.2~1.7%, further preferably 1.52~1.65%.In the present invention, the Ni can promote horse
The formation of family name's body, and guarantee toughness of the invention.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention include V 0.80~
1.50%, preferably 1.05~1.45%, further preferably 1.12~1.24%.In the present invention, the V and C forms carbon
Compound, and crystal grain can be refined, guarantee hardness of the invention, and play the role of solution strengthening.
On the basis of the mass content of the C, TBM hob cutter ring alloy material provided by the invention include Nb 0.10~
0.40%, preferably 0.15~0.35%, further preferably 0.2~0.3%.In the present invention, the Nb and C, which is formed, is carbonized
Object, and crystal grain can be refined, improve the toughness of material.
On the basis of the mass content of the C, in the present invention, content≤0.03% of the S, further preferably≤
0.025%；Content≤0.03% of the P, further preferably≤0.024%.In the present invention, described P, S are harmful members
Element should reduce the content of P and S to the greatest extent in the conceived case.
Based on mass content, in addition to above-mentioned each element, TBM hob cutter ring alloy material provided by the invention includes surplus
Fe。
In the present invention, the tissue of the TBM hob cutter ring alloy material is preferably tempered martensite and precipitate, described
Precipitate contains the carbide of the carbide of niobium, the carbide of molybdenum and vanadium.In the present invention, in terms of volume content, the tempering
The volume content of martensite is preferably 92~96%；The volume content of the precipitate is preferably 4~8%；In the present invention, institute
The length for stating precipitate is preferably 30~50 μm, further preferably 35~48 μm, more preferably 40~45 μm.In the present invention
In, the tempered martensite maintains higher firmness level, and the tempered martensite itself with low-dislocation-density also has
There are good plasticity and toughness.
In the present invention, the size of microcrystal of the TBM hob cutter ring alloy material is preferably 80~120 μm, further excellent
It is selected as 85~115 μm, more preferably 90~100 μm.
The present invention promotes mechanical property by the content of control each element, in the premise for meeting the requirement of operating condition plastic toughness
Under, significantly improve the intensity and toughness of alloy material.
The present invention also provides a kind of preparation methods of TBM hob cutter ring alloy material described in above-mentioned technical proposal, including
Following steps:
(1) it will be cast after alloy raw material melting, obtain cartridge type casting；
(2) it will be forged after cartridge type casting parts thermal insulation that the step (1) obtains, obtain just base；
(3) the first base that the step (2) obtains is annealed, obtain annealing just base；
(4) just base carries out roughing for the annealing for obtaining the step (3), obtains first product；
(5) first product that the step (4) obtains successively is quenched and is tempered, obtain the conjunction of rock tunnel(ling) machine hobboing cutter cutter ring
Golden material.
The present invention will be cast after alloy raw material melting, obtain cartridge type casting.Kind of the present invention to the alloy raw material
Class does not have special restriction, using the alloy raw material of steel-making well known to those skilled in the art.In the present invention, the conjunction
Golden raw material preferably includes steel scrap, high carbon ferro-chrome, low-carbon ferrochromium, ferrosilicon, manganese iron, molybdenum-iron, vanadium iron, ferro-niobium and nickel raw material.The present invention
There is no special restriction to the ratio of various alloy raw materials, final alloying component can be made to meet the requirements.
In the present invention, the melting is preferably electro-smelting, is obtained without refining route by common smelting furnace
Melting liquid reduces production cost convenient for operation.The present invention does not have special restriction to the specific embodiment of the melting, adopts
With the technical solution of steel-making well known to those skilled in the art.In the present invention, the temperature of the melting is preferably 1600
~1650 DEG C, more preferably 1630~1640 DEG C；The time of the melting is preferably 1.2~1.8h.
After the completion of melting, the present invention preferably adds aluminium powder into the melting liquid that the melting obtains, and carries out deoxidation treatment.?
In the present invention, the aluminium powder dosage is preferably the 0.2~0.3% of melting liquid quality.In the present invention, the temperature of the deoxidation treatment
Preferably 1600~1620 DEG C of degree, the time of deoxidation treatment is preferably 1~3min.The present invention during deoxidation treatment,
Aluminium powder reacts with O element in melting liquid, and the content of the elements such as O in melting liquid is effectively reduced, is further ensured that the pure of melt
Cleanliness.
In the present invention, the casting is preferably sand casting or centrifugal casting；The casting molds are preferably annulated column
Pattern.In the present invention, the selection of dimension of TBM hob cutter ring of the size of the annulated column pattern tool according to required preparation；It is described
Internal diameter of the internal diameter of ring mould preferably than target TBM hob cutter ring is 5~15mm big, and the outer diameter of the ring mould preferably compares mesh
Mark the big 5~15mm of outer diameter of TBM hob cutter ring.In the present invention, the temperature of the casting is consistent with the temperature of melting liquid.
After obtaining cartridge type casting, the present invention forges the cartridge type casting, obtains just base.
In the present invention, the starting forging temperature of forging is preferably 990~1040 DEG C, and further preferably 1000~1030 DEG C,
More preferably 1010~1015 DEG C；The final forging temperature of the forging is preferably at 900 DEG C or more, and further preferably 920 DEG C；It is described
The forging ratio of forging is preferably 1.5 or more, and further preferably 1.5~2.
In the present invention, the forging can change as-cast structure, smash the unfavorable tissue such as dendrite, homogenization of composition；
Forging forms recrystallization, realizes reconstructed tissue, is conducive to the carbide for refining matrix and precipitation, improves performance.
The cartridge type casting is carried out isothermal holding preferably before forging by the present invention, and the temperature of the isothermal holding is preferably
1090~1140 DEG C, further preferably 1100~1130 DEG C, more preferably 1120 DEG C；The time of the heat preservation is preferably 5~
6h, further preferably 5.5~5.8h.In the present invention, the isothermal holding process can ensure that alloying component homogenizes, separately
Temperature drop when being on the one hand the time interval and cooling for considering heating furnace and forging machine procedure connection, prevents steel billet burning.
After obtaining just base, the present invention anneals the just base, and obtain annealing just base.In the present invention, the annealing
Preferably include the successively carry out first annealing and the second annealing.In the present invention, the temperature of first annealing be preferably 850~
The time of 860 DEG C, further preferably 855~858 DEG C, the first annealing is preferably 3.9~4.1h, further preferably 3.95~
4.0h；In the present invention, the temperature of second annealing is preferably 715~725 DEG C, and further preferably 718~722 DEG C, more
Preferably 720 DEG C；The time of second annealing is preferably 1.9~2.1h, further preferably 2h.In the present invention, described
The holding temperature of the second annealing is directly cooled to after first annealing heat preservation with the speed of 30~50 DEG C/h, realization is annealed stage by stage
Heat preservation；The present invention does not have particular/special requirement to the rate of the cooling, is using rate of temperature fall well-known to those skilled in the art
It can.In the present invention, the type of cooling after second annealing is preferred are as follows: after being cooled to 500 DEG C with the speed of 30~50 DEG C/h
It is air-cooled to room temperature.
In the present invention, the annealing can improve bacillar structure after forging, reduce the strength of materials, slightly add conducive to subsequent
Work.
It obtains annealing after just base, base at the beginning of the annealing is carried out roughing by the present invention, obtains first product.The present invention is to described thick
The not special restriction of the operation of processing, using rough machined technical solution well known to those skilled in the art.In this hair
In bright, the roughing is preferably machined.The present invention does not have special restriction to the rough machined size, according to using need
It asks and is adjusted.The present invention carries out roughing according to the target size of TBM hob cutter ring first, avoids subsequent quenching treatment
Alloy material hardness is too high afterwards, increases difficulty of processing.
After obtaining first product, the first product is successively quenched and is tempered by the present invention, obtains TBM hob cutter ring alloy material
Material.In the present invention, the temperature of the quenching is preferably 1030~1090 DEG C, further preferably 1050~1080 DEG C, more excellent
It is selected as 1055~1075 DEG C；The time of the quenching is preferably 8~10 hours.In the present invention, the quenching is preferably with true
The quenching of empty high pressure gas glowing furnace, the quenching vacuum degree are preferably 0.08~0.12Pa, and the pressure of nitrogen is preferably when quenching
0.4~0.6MPa.In the present invention, the temperature being quickly quenching into is preferably 70~100 DEG C；In the present invention, tempering tool
Body carries out in forvacuum tempering furnace, and the temperature of the tempering is preferably 450~580 DEG C, further preferably 480~550
DEG C, more preferably 500~520 DEG C；The time of the tempering is preferably 5~6 hours.In the present invention, the tempering is cooled to
Temperature be preferably 380~420 DEG C.
In the present invention, ingredient described in scheme in view of the above technology, quenches again after being kept the temperature under the hardening heat
Martensitic structure can be obtained, in subsequent drawing process, martensite transfor mation is the preferable tempered martensite of plasticity and toughness；In this hair
In bright, the additional amount of Cr is less, and the additional amount of Mo, V and Nb are more, therefore molybdenum, vanadium and niobium are preferentially formed in alloy graining
Carbide, these carbide small and disperseds distribution, to improve material toughness be advantageous.
After tempering, the present invention preferably finishes the obtained tempering green body that is tempered, and obtains the conjunction of TBM hob cutter ring
Golden material.The present invention makes resulting alloy material size more regular by finishing passes, resulting TBM hob cutter ring
Alloy material is TBM hob cutter ring, be can be used directly.
In the present invention, the present invention does not have particular/special requirement to the specific embodiment of the finishing, using this field skill
Finishing mode known to art personnel；In an embodiment of the present invention, the finishing is specially to machine.The present invention
There is no special restriction to the rough machined size, is adjusted according to use demand.
In order to further illustrate the present invention, below with reference to embodiment to TBM hob cutter ring alloy material provided by the invention
And preparation method thereof be described in detail, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1:
(1) according to target alloying component divides mass percent are as follows: C 0.72%, Si 1.19%, Mn 1.41%, Cr
2.23%, Mo 1.62%, Ni 1.02%, V 1.12%, Nb 0.26%, S 0.027%, P 0.024%, surplus Fe, matches
Each steel scrap, high carbon ferro-chrome, low-carbon ferrochromium, ferrosilicon, manganese iron, molybdenum-iron, vanadium iron, ferro-niobium and nickel raw material are made, it is molten using intermediate frequency melting furnace
Refining melts raw material for iron liquid at a temperature of 1650 DEG C；
(2) aluminium powder is added into iron liquid, additional amount is the 0.08% of iron liquid weight, carries out deoxidation treatment；
(3) after calm slagging-off, iron liquid is poured into sand mold at a temperature of 1580 DEG C, obtains cartridge type casting；
(4) the remaining iron liquid of cartridge type cast(ing) surface is cleared up, after the completion of cleaning, is forged.When forging, add before forging
Heat keeps the temperature 5 hours to 1140 DEG C, and starting forging temperature is 1040 DEG C, final forging temperature >=900 DEG C, forging ratio 1.8；
(5) forging is subjected to spheroidizing, specifically comprises the processes of: forging is placed in 860 DEG C of heat preservation 4.0h, cools to 720 DEG C
2.0h is kept the temperature, is come out of the stove when being then cooled to 500 DEG C with the speed of 30 DEG C/h air-cooled；
(6) blank after annealing is subjected to roughing；
(7) blank after roughing is subjected to vacuum hardening and double tempering is handled, vacuum hardening temperature is 1080 DEG C, is protected
The warm time is 10h, and then water cooling is to 70 DEG C；Double tempering temperature is 550 DEG C, and the double tempering time is 6h；It is empty after double tempering
It is cooled to 400 DEG C；
(8) it after double tempering processing, is finished, obtains TBM hob cutter ring.
Embodiment 2:
(1) according to target alloying component divides mass percent are as follows: C 0.79%, Si 1.33%, Mn 1.62%, Cr
2.51%, Mo 1.81%, Ni 1.35%, V 1.05%, Nb 0.16%, S 0.025%, P 0.027%, surplus Fe, matches
Each steel scrap, high carbon ferro-chrome, low-carbon ferrochromium, ferrosilicon, manganese iron, molybdenum-iron, vanadium iron, ferro-niobium and nickel raw material are made, it is molten using intermediate frequency melting furnace
Refining melts raw material for iron liquid at a temperature of 1630 DEG C；
(2) aluminium powder is added into iron liquid, additional amount is the 0.12% of iron liquid weight, carries out deoxidation treatment；
(3) after calm slagging-off, iron liquid is poured into sand mold at a temperature of 1560 DEG C, obtains cartridge type casting；
(4) the remaining iron liquid of cartridge type cast(ing) surface is cleared up, after the completion of cleaning, is forged.When forging, add before forging
Heat keeps the temperature 6 hours to 1120 DEG C, and starting forging temperature is 1020 DEG C, final forging temperature >=900 DEG C, forging ratio 1.8；
(5) forging is subjected to spheroidizing, specifically comprises the processes of: 850 DEG C of heat preservation 4.0h cool to 710 DEG C of heat preservation 2.0h, with
It comes out of the stove when being cooled to 500 DEG C afterwards with the speed of 30 DEG C/h air-cooled；
(6) blank after annealing is subjected to roughing；
(7) blank after roughing is subjected to vacuum hardening and double tempering is handled, vacuum hardening temperature is 1060 DEG C, is protected
The warm time is 10h, and then water cooling is to 70 DEG C；Double tempering temperature is 550 DEG C, and the double tempering time is 6h；It is empty after double tempering
It is cooled to 420 DEG C；
(8) it finishes, obtains TBM hob cutter ring.
Embodiment 3:
(1) according to target alloying component divides mass percent are as follows: C 0.83%, Si 1.55%, Mn 1.21%, Cr
2.72%, Mo 1.50%, Ni 1.55%, V 1.24%, Nb 0.20%, S 0.020%, P 0.025%, surplus Fe, matches
Each steel scrap, high carbon ferro-chrome, low-carbon ferrochromium, ferrosilicon, manganese iron, molybdenum-iron, vanadium iron, ferro-niobium and nickel raw material are made, it is molten using intermediate frequency melting furnace
Refining melts raw material for iron liquid at a temperature of 1660 DEG C；
(2) aluminium powder is added into iron liquid, additional amount is the 0.10% of iron liquid weight, carries out deoxidation treatment；
(3) after calm slagging-off, iron liquid is poured into sand mold at a temperature of 1550 DEG C, obtains cartridge type casting；
(4) the remaining iron liquid of cartridge type cast(ing) surface is cleared up, after the completion of cleaning, is forged.When forging, add before forging
Heat keeps the temperature 6 hours to 1120 DEG C, and starting forging temperature is 1010 DEG C, final forging temperature >=900 DEG C, forging ratio 1.8；
(5) forging is subjected to spheroidizing, specifically comprises the processes of: 850 DEG C of heat preservation 4.0h cool to 720 DEG C of heat preservation 2.0h, with
It comes out of the stove when being cooled to 500 DEG C afterwards with the speed of 30 DEG C/h air-cooled；
(6) blank after annealing is subjected to roughing；
(7) blank after roughing is subjected to vacuum hardening and double tempering is handled, vacuum hardening temperature is 1050 DEG C, is protected
The warm time is 10h, and then water cooling is to 70 DEG C；Double tempering temperature is 580 DEG C, and the double tempering time is 6h；It is empty after double tempering
It is cooled to 400 DEG C；
(8) it finishes, obtains TBM hob cutter ring.
The cutter ring of 17 inch hobboing cutters obtained in embodiment 1,2 and 3, and the examination of standard V-type impact flexibility is intercepted from cutter ring
Sample, specimen size are 10mm × 10mm × 55mm.The ingredient and performance surveyed with traditional Wirth17 inch cutter ring compare,
Comparing result is as shown in table 1.
The hobboing cutter cutter ring ingredient and performance of 1 comparative example of table and different embodiments
Optics metallographic observation and scanning electron microscopic observation are carried out to the TBM hob cutter ring alloy material that embodiment 1 obtains；Its
In, optics metallograph is as shown in Figure 1, stereoscan photograph is as shown in Figure 2, wherein precipitate sweeps in stereoscan photograph
It is as shown in Figure 3 that described point analyzes result.
In conjunction with Fig. 1~3 it is found that containing tempered martensite in the tissue of obtained TBM hob cutter ring alloy material, also contain
The precipitate being made of the carbide of the carbide of Dispersed precipitate and niobium, the carbide of molybdenum and vanadium, is not precipitated the carbide of chromium.
Embodiment 4
Hobboing cutter cutter ring is prepared in the way of embodiment 1, difference is: subject alloy based on when melting ingredient forms
Are as follows: C 0.70%, Si 1.01%, Mn2.00%, Cr 3.00%, Mo 1.50%, Ni 1.01%, V 1.50%, Nb
0.22%, S 0.026%, P 0.025%, surplus Fe；After completing deoxidation, gone bad using ladle bottom pouring process to iron liquid
Processing, alterant are yttrium-base heavy rare earth particle of the granularity less than 10mm for accounting for iron liquid weight 0.3%；In forging process, forging ratio
It is 1.5.
Embodiment 5
Hobboing cutter cutter ring is prepared in the way of embodiment 2, difference is: subject alloy based on when melting ingredient forms
Are as follows: C 0.87%, Si 1.01%, Mn2.00%, Cr 2.40%, Mo 1.55%, Ni 1.8%, V 1.00%, Nb
0.21%, S 0.027%, P 0.024%, surplus Fe；After completing deoxidation, gone bad using ladle bottom pouring process to iron liquid
Processing, alterant are yttrium-base heavy rare earth particle of the granularity less than 10mm for accounting for iron liquid weight 0.4%；In forging process, forging ratio
It is 1.6.
Embodiment 6
Hobboing cutter cutter ring is prepared in the way of embodiment 3, difference is: subject alloy based on when melting ingredient forms
Are as follows: C 0.84%, Si 1.55%, Mn1.45%, Cr 3.00%, Mo 2.00%, Ni 2.0%, V 1.50%, Nb
0.11%, S 0.022%, P 0.021%, surplus Fe；After completing deoxidation, gone bad using ladle bottom pouring process to iron liquid
Processing, alterant are yttrium-base heavy rare earth particle of the granularity less than 10mm for accounting for iron liquid weight 0.4%；In forging process, forging ratio
It is 1.6.
Optics metallographic observation and scanning electron microscopic observation are carried out respectively to the hobboing cutter cutter ring that embodiment 2~6 obtains；As a result with
The test result of embodiment 1 is similar, can obtain in the tissue of obtained TBM hob cutter ring alloy material and contain tempered martensite,
The precipitate of the carbide composition of the carbide and vanadium of carbide, molybdenum also containing Dispersed precipitate and niobium, is not precipitated the carbon of chromium
Compound.The volume fraction of precipitate is respectively 5.4%, 5.6%, 4.1%, 6.7% and 6.2% in embodiment 2~6.
The impact flexibility for the hobboing cutter cutter ring that embodiment 4~6 obtains is respectively 8.9,6.7 and 7.2；HRC hardness is respectively
59.4,61.8 and 61.5.
In the wearability for the hobboing cutter Disc Cutter Ring Material that Wirth company Disc Cutter Ring Material is compared in laboratory and we develop, we are adopted
Wear test is carried out with rubber foot wheel abrasion tester.Three samples are taken to be tested on same cutter ring.Specimen size: 50 × 20 ×
6 (mm), load 7kg, rubber wheel rotation speed 240rpm, rubber wheel diameter 176mm, rubber wheel hardness 60 (Shao Er formula), quartz
Fineness of sand 40-80 mesh, quartz sand flow about 590g/min (400ml/min), wearing- in period 250s, the total revolution of rubber wheel about 1000
Turn.Test data is as shown in table 2:
2 rubber wheel Wear Test Data of table
| Sample | Average weightlessness (milligram) | Wear rate improves percentage (%) |
| Example 1 | 261.6 | 25.1 |
| Example 2 | 271.3 | 22.3 |
| Example 3 | 275.2 | 21.2 |
| Example 4 | 264 | 24.4 |
| Example 5 | 245.1 | 29.8 |
| Example 6 | 261.5 | 25.1 |
| Wirth cutter ring | 349.2 |
By the data of table 2 it is found that the service life of Examples 1 to 6 hobboing cutter cutter ring than traditional Wirth cutter ring service life
It is respectively increased 25.1%, 22.3%, 21.2%, 24.4%, 29.8%, 25.1%, is shown: hobboing cutter cutter ring phase provided by the invention
Service life than traditional Wirth cutter ring improves 20% or more.
Hobboing cutter cutter ring provided by the invention is special with hardness height, good toughness it can be seen from the above comparative example and embodiment
Point.
Preparation method simple economy provided by the invention, stable product quality.
The above is only a preferred embodiment of the present invention, it is not intended to limit the present invention in any form.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (8)
1. a kind of rock tunnel(ling) machine hobboing cutter cutter ring alloy material, based on mass content, comprising: C 0.70~0.90%, Si 1.01
~2.00%, Mn 1.01~2.00%, Cr 2.00~3.00%, Mo 1.50~2.00%, Ni 1.01~2.00%, V
The Fe of 1.05~1.45%, Nb 0.10~0.40, S≤0.03%, P≤0.03% and surplus；
The tissue of the rock tunnel(ling) machine hobboing cutter cutter ring alloy material is tempered martensite and precipitate, and the precipitate contains niobium
Carbide, the carbide of molybdenum and the carbide of vanadium；
The crystallite dimension of the rock tunnel(ling) machine hobboing cutter cutter ring alloy material is 80~120 μm.
2. the preparation method of rock tunnel(ling) machine hobboing cutter cutter ring alloy material described in claim 1, which is characterized in that including following
Step:
(1) it will be cast after alloy raw material melting, obtain cartridge type casting；
(2) the cartridge type casting that the step (1) obtains is forged, obtains just base；
(3) the first base that the step (2) obtains is annealed, obtain annealing just base；
(4) just base carries out roughing for the annealing for obtaining the step (3), obtains first product；
(5) first product that the step (4) obtains successively is quenched and is tempered, obtain rock tunnel(ling) machine hobboing cutter cutter ring alloy material
Material.
3. preparation method according to claim 2, which is characterized in that in the step (1) temperature of melting be 1600~
1650 DEG C, the mode of melting is electro-smelting.
4. preparation method according to claim 2, which is characterized in that the starting forging temperature forged in the step (2) is 990
~1040 DEG C, for the final forging temperature of forging at 900 DEG C or more, the forging ratio of forging is 1.5 or more.
5. preparation method according to claim 2 or 4, which is characterized in that before step (2) forging, by the cartridge type
Casting carries out isothermal holding；The temperature of the heat preservation is 1090~1140 DEG C, and the time of heat preservation is 5~6h.
6. preparation method according to claim 2, which is characterized in that annealing includes successively carrying out in the step (3)
First annealing and the second annealing；The temperature of first annealing is 850~860 DEG C, and the time of the first annealing is 3.9~4.1h；
The temperature of second annealing is 715~725 DEG C, and the time of the second annealing is 1.9~2.1h.
7. preparation method according to claim 2, which is characterized in that the temperature quenched in the step (5) is 1030~
1090 DEG C, the time of quenching is 8~10h.
8. the preparation method according to claim 2 or 7, which is characterized in that the temperature being tempered in the step (5) is 450
~580 DEG C, the time of tempering is 5~6h.
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| CN109338226B (en) * | 2018-11-20 | 2020-09-25 | 中铁工程装备集团隧道设备制造有限公司 | Material for high-performance TBM cutter head scraper plate and preparation method thereof |
| CN109957702A (en) * | 2019-02-26 | 2019-07-02 | 唐山志威科技有限公司 | The preparation method of high rigidity, high tenacity development machine cutter ring steel ZW552 |
| CN111203693B (en) * | 2020-01-20 | 2021-09-14 | 湖南泰嘉新材料科技股份有限公司 | Manufacturing process and production line of bimetal composite steel strip |
| CN112157242B (en) * | 2020-08-31 | 2022-04-08 | 中铁工程装备集团隧道设备制造有限公司 | Composite hob ring and preparation method thereof |
| CN112458376B (en) * | 2020-12-01 | 2022-04-22 | 中铁工程装备集团有限公司 | Hob cutter ring and preparation method thereof |
| CN114293108A (en) * | 2021-12-30 | 2022-04-08 | 广州神拓科技有限公司 | Shield machine hob alloy material and preparation process thereof |
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| CN1330787C (en) * | 2004-03-16 | 2007-08-08 | 中铁隧道集团有限公司 | Shield engine disk type hobbing cutter ring and its production method |
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