CN110421242A - A kind of wear resistant alloy material and the wear-resisting cutter ring plasma surfacing technique of shield machine - Google Patents
A kind of wear resistant alloy material and the wear-resisting cutter ring plasma surfacing technique of shield machine Download PDFInfo
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- CN110421242A CN110421242A CN201910874413.5A CN201910874413A CN110421242A CN 110421242 A CN110421242 A CN 110421242A CN 201910874413 A CN201910874413 A CN 201910874413A CN 110421242 A CN110421242 A CN 110421242A
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- tungsten carbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up welding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
Abstract
The invention belongs to shield cutter technical fields, more particularly to a kind of wear resistant alloy material and the wear-resisting cutter ring plasma surfacing technique of shield machine, it is poor to solve shield machine cutter ring wear-resisting property in the prior art, production efficiency is low, the problem of quality stability difference, the technical scheme is that including NiCrBSi alloy and spherical cast tungsten carbide, the NiCrBSi alloy mass percentage is 35%~45%, the spherical cast tungsten carbide mass percent is 55%~65%, plasma surfacing technique includes a. cleaning treatment, b. the pre-heat treatment, c. the bead-welding technology parameter of welding machine is adjusted, d. welding gun positions, e. start built-up welding, f. heat preservation cooling.The present invention improves the wear-resisting property of shield machine cutter ring, extends cutter ring service life, reduces the consumption of cutter ring and the workload of plant maintenance, reduces unit and excavates cost.The present invention is suitable for the manufacture of the wear-resisting cutter ring of shield machine.
Description
Technical field
The invention belongs to shield cutter technical fields, and in particular to a kind of wear resistant alloy material and the wear-resisting cutter ring of shield machine etc.
Ion bead-welding technology.
Background technique
Shield machine is widely applied and the operations such as underground engineering and tunnel piercing, and not only work efficiency is high for it, has a safety feature,
And it is economic and environment-friendly.Be provided with cutter on the cutterhead of shield machine, shield machine mostly used when excavation operation disk cutter or
Serrated knife carries out broken rock, and is carried out scraping fragmented rock with scraper and repaired to scrape the tunnel borehole wall using auxiliary, in tunneling process,
Shield cutter is subjected to very big broken rock power, while being subjected to the long term wear of rock again, reduces to the serious wear of cutter
The efficiency of breaking rock and digging diameter of development machine, must frequently replace shield cutter thus, to increase disappearing for vulnerable part
The workload of consumption and plant maintenance finally makes unit excavate cost and improves.
In order to increase the wearability of cutter, a kind of method is the hardness of raising cutter ring ontology, but it is tough to reduce cutter ring
Property, in engineering practice, stratum and the complexity such as quartzite stronger for abrasiveness, sandstone, weathering red rock, fracture conglomerate
Stratum, the simple hardness by raising material meet the needs of stratum, and the toughness for sacrificing cutter is run counter to desire；Separately
A kind of method is one layer of wearing layer of built-up welding on cutter, right while keeping existing cutter attack toughness or improve impact flexibility
Tool surface further enhances.A kind of economic and quick process of the built-up welding as surface enhanced, is widely used in machinery
The manufacture of part and during remanufacturing.
Existing overlaying method using it is more be oxyacetylene torch built-up welding and plasma surfacing, Flame surfacing technique needs
By substrate preheating and it is heated to higher temperature, sample is heated serious, and heat affected area is big, therefore thermal deformation and stress are big；It reviews
Plasma surfacing substrate preheating temperature is lower, and welding gun energy density is high, and heating and cooling velocity are fast, and heat affected area is small, thermal change
Shape and stress are small, and it is very tiny quickly to solidify obtained tissue, thus plasma surfacing layer surface finish, adhesion strength,
Compactness and plasticity are all more excellent than flame spurt welding layer.Plasma surfacing is divided into manual plasma surfacing and numerical control plasma surfacing,
The product overlay cladding welding bead of middle craft plasma surfacing is obvious, and butt welding layer surface is uneven on earth, appearance is coarse；In addition, by hand etc.
Ion built-up welding working efficiency is low, large labor intensity, more demanding to the level of skill of operator, the product size and quality of built-up welding
It is difficult to control.
Through retrieving, Chinese patent application (publication number: CN107625501A, publication date: 2018.01.19) discloses one kind
The method of plasma arc surfacing tungsten carbide cutter ring, i.e., in cutter ring outer rim two sides plasma arc deposition Tungsten Carbide Surfacing powder, to mention
The wearability and impact resistance of high cutter ring.The no quantization parameter of plasma surfacing technical process of the invention；At cutter ring maximum outer circle
Non- build-up wear-resistant layer easily causes the ontology advanced wear of cutter ring outer circle, and the wearing layer of two sides is also emptied, and service life is limited；
The wearing layer of nano-stage tungsten carbide powder end built-up welding made from its special process is answered suitable for cutting the thicker pile foundation containing reinforcing bar
Relatively limited to range.
Summary of the invention
For the problem that shield machine cutter ring wear-resisting property is poor, production efficiency is low, quality stability is poor in the prior art, this hair
It is bright that a kind of wear resistant alloy material and the wear-resisting cutter ring plasma surfacing technique of shield machine are provided, its object is to: improve shield machine knife
The wear-resisting property of circle extends cutter ring service life, improves production efficiency, improves quality stability.
The technical solution adopted by the invention is as follows:
A kind of wear resistant alloy material, including NiCrBSi alloy and spherical cast tungsten carbide, the NiCrBSi alloy mass
Percentage is 35%~45%, and the spherical cast tungsten carbide mass percent is 55%~65%.
After the technical solution, alloy material is more wear-resisting, will can be improved on this Alloyapplication to shield machine cutter ring
The wear-resisting property of shield machine cutter ring extends cutter ring service life, reduces the consumption of cutter ring and the workload of plant maintenance, reduces
Unit excavates cost.
Preferably, in the NiCrBSi alloy each component shared mass percent: Cr be 10%~15%, B be
It is 0~0.6%, Fe is 0~5% that 1.5%~3%, Si, which are 2%~4%, C, remaining is Ni.
After the technical solution, the wear-resisting property of wear resistant alloy material is more preferable.
Preferably, the screen size of the NiCrBSi alloy and spherical cast tungsten carbide is 45 μm~150 μm, spherical
In cast tungsten carbide, granularity D is that 150 μm of 125 μm≤D < accounts for 20%~30%, 125 μm of 75 μm≤D < account for 55%~
75 μm of < of 65%, 45 μm≤D account for 10%~20%.
After the technical solution, the powder feeding efficiency in weld deposit process can be improved, while overlay cladding can be made more evenly,
And optimization design tungsten carbide particle size and ratio, so that particle gap filling is fuller, institutional framework is fine and close, Neng Gouti
The wear-resisting property and toughness of high cutter ring.
Preferably, the NiCrBSi alloy through atomization process be it is spherical, the spherical cast tungsten carbide is through spheroidising
It is spherical.
After the technical solution, the tungsten carbide performance of spherical design is stablized, and has higher anti-crack ability.
Preferably, the NiCrBSi alloy rigidity is greater than HRC40, and the spherical cast tungsten carbide microhardness is not less than
2700HV。
After the technical solution, the hardness of wear resistant alloy material is high, and wear-resisting property is more preferable.
A kind of plasma surfacing technique preparing the wear-resisting cutter ring of shield machine using the wear resistant alloy material, including it is following
Step:
A. cleaning treatment: blasting treatment is carried out to cutter ring outer rim, removes rust staining, greasy dirt and the oxidation of cutter ring outer fringe surface
Skin；
B. the pre-heat treatment: cutter ring ontology is heated；
C. the bead-welding technology parameter of welding machine is adjusted；
D. welding gun position: keep plasma gun vertical with the holding of cutter ring outer rim side, and apart from cutter ring outer rim side 10~
15mm；
E. start built-up welding: plasma surfacing is carried out to cutter ring blade and external knife ring edge two sides；
F. heat preservation cooling: being put into incubator for cutter ring ontology, slow cooling is covered using ceramic wool insulation cotton, to cutter ring ontology
Temperature carries out air-cooled after being cooled to lower than 150 DEG C.
Using plasma surfacing technique, wear resistant alloy material and cutter ring substrate combinating strength are high, and built-up welding cladding speed is fast, dilute
Release that rate is low, and the tissue quickly solidified is very tiny, surface smoothness, adhesion strength, compactness and toughness are high, and
It is designed by packaging type, so that the equal metallurgical bonding wear-resistant tungsten carbide alloy in two sides and top of cutter ring ontology outer rim, bond strength
Height, wear-resistant tungsten carbide alloy can protect cutter ring ontology, be effectively ensured shield cutter the stronger quartzite of driving abrasiveness,
When the stratum such as sandstone, weathering red rock, fracture conglomerate and complexity stratum, there is higher wearability and longer service life,
Reduce replacement or maintenance cost.
Preferably, the preheating temperature in step b is 350 DEG C~400 DEG C.
After the technical solution, cutter ring substrate preheating temperature is lower, and welding gun energy density is high, heating and cooling velocity
Fastly, heat affected area is small, and thermal deformation and stress are small.
Preferably, the bead-welding technology parameter in step c are as follows: turning arc current is 100~150A, and back ground current is 25~35A,
Voltage is 28~32V, and plasma gas flow is 8~10SCFH, and shield gas flow rate is 16~20SCFH, powder feeding gas flow
For 8~10SCFH, powder feed rate is 10~20g/min, and built-up welding speed is 300~500mm/min.
After the technical solution, electric current appropriate ensures that cutter ring matrix heat affected area is small, dilution rate is low, gas appropriate
Flow, powder feed rate and built-up welding speed ensure that surfacing layer's densification pore-free, surface forming are beautiful.
Preferably, including programmable digital controlling plasma build-up welding apparatus, the digital controlling plasma build-up welding apparatus include welding
Manipulator 1, positioner 2 and digitlization plasma welding machine 3.
After the technical solution, artificial uncontrollable factor is converted into controllable device parameter, it is thus obtained
Surfacing layer quality is reliable and stable, overlay cladding flat appearance, while greatly improving working efficiency, improves operating condition, mitigates operation
The labor intensity of person is suitble to the shield cutter production of mass.
Preferably, the welding manipulator 1 is six axis welding manipulators, has off-line programming software and imports journey online
The function of sequence, the positioner 2 are two axis positioners, have the function of anti-and rotation two of inclining, the number
Changing plasma welding machine 3 has the function of visual edit and storage plasma surfacing parameter.
After the technical solution, offline plasma surfacing process establishment can be carried out according to shield cutter 3D model and is waited
Ion built-up welding track programming, i.e., form whole set process regulation according to the design of shield cutter, is convenient for curing process and quality
Control is suitble to the shield cutter production of seriation.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. optimizing the formula of wear resistant alloy material, the wearability of wear resistant alloy material is increased, by this alloy material application
It can be improved the wear-resisting property of shield machine cutter ring on to shield machine cutter ring, extend cutter ring service life, reduce the consumption of cutter ring
With the workload of plant maintenance, reduces unit and excavate cost.
2. optimizing the content of each component in NiCrBSi alloy, the wear-resisting property of wear resistant alloy material is more preferable.
The screen size of 3.NiCrBSi alloy and spherical cast tungsten carbide is 45 μm~150 μm, can be improved built-up welding
Powder feeding efficiency in journey, while overlay cladding can be made more evenly.In spherical cast tungsten carbide, in spherical cast tungsten carbide, granularity D
20%~30% is accounted for for 150 μm of 125 μm≤D <, and 125 μm of 75 μm≤D <'s accounts for 55%~65%, 75 μm of 45 μm≤D <'s
Account for 10%~20%.Optimization design tungsten carbide particle size and ratio, so that particle gap filling is fuller, institutional framework is caused
It is close, it can be improved the wear-resisting property and toughness of cutter ring.
4.NiCrBSi alloy and spherical cast tungsten carbide are handled to be spherical, and the tungsten carbide performance of spherical design is stablized,
With higher anti-crack ability.
5.NiCrBSi alloy rigidity is greater than HRC40, and spherical cast tungsten carbide microhardness is not less than 2700HV, resistance to adjustment
The hardness of golden material is high, and wear-resisting property is more preferable.
6. using plasma surfacing technique, wear resistant alloy material and cutter ring substrate combinating strength are high, and built-up welding cladding speed is fast,
Dilution rate is low, and the tissue quickly solidified is very tiny, and surface smoothness, adhesion strength, compactness and toughness are high, and
And designed by packaging type, so that the equal metallurgical bonding wear-resistant tungsten carbide alloy in two sides and top of cutter ring ontology outer rim, in conjunction with strong
Degree is high, and wear-resistant tungsten carbide alloy can protect cutter ring ontology, and shield cutter has been effectively ensured in the driving stronger quartz of abrasiveness
When rock, sandstone, weathering red rock, fracture conglomerate etc. stratum and complexity stratum, there is higher wearability and longer use the longevity
Life, reduces replacement or maintenance cost.
7. cutter ring substrate preheating temperature is lower, welding gun energy density is high, and heating and cooling velocity are fast, and heat affected area is small, heat
Deformation and stress are small.
8. electric current appropriate ensures that cutter ring matrix heat affected area is small, dilution rate is low, gas flow appropriate, powder feed rate and
Built-up welding speed ensures that surfacing layer's densification pore-free, surface forming are beautiful.
9. using programmable digital controlling plasma build-up welding apparatus, artificial uncontrollable factor is converted into controllable equipment
Parameter, thus obtained surfacing layer quality is reliable and stable, overlay cladding flat appearance, while greatly improving working efficiency, improves and makees
Industry condition mitigates the labor intensity of operator, is suitble to the shield cutter production of mass.
10. offline plasma surfacing process establishment and plasma surfacing track journey can be carried out according to shield cutter 3D model
Sequence programming, i.e., form whole set process regulation according to the design of shield cutter, controls convenient for curing process and quality, is suitble to seriation
Shield cutter production.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the SEM photograph of Ni-based spherical tungsten carbide alloy welding deposit layer；
Fig. 2 is digital controlling plasma built-up welding schematic diagram；
Fig. 3 is cutter ring structural schematic diagram；
Fig. 4 is cutter ring sectional view；
Fig. 5 is the microphoto of routine casting tungsten carbide overlay cladding after crushing test；
Fig. 6 is the microphoto of wear resistant alloy material overlay cladding of the present invention after crushing test.
Wherein, 1- welding manipulator, 2- positioner, 3- digitize plasma welding machine, 4- cutter ring ontology, the resistance to adjustment of 5-
Golden material.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
It elaborates below with reference to Fig. 1, Fig. 2 to the present invention.
Embodiment one
A kind of wear resistant alloy material, including NiCrBSi alloy and spherical cast tungsten carbide, the NiCrBSi alloy mass
Percentage is 35%, and the spherical cast tungsten carbide mass percent is 65%.Setting can be improved shield machine cutter ring in this way
Wear-resisting property extends cutter ring service life.
The wear resistant alloy material of the present embodiment is carried out reciprocatingly sliding wear test and rushes sliding composite abrasion test:
1. reciprocatingly slide wear test: the overlay cladding wear scar width of reciprocating friction times N=2000 time, the present embodiment is
0.39mm, H13 mould steel wear scar width 0.67mm commonly used in the prior art compare the alloy material it can be seen that the present embodiment
Wear-resisting property is more preferable.
2. rushing sliding composite abrasion test: impact wear times N=15000 time, the overlay cladding impact zone and cunning of the present embodiment
Without obvious polishing scratch, H13 mould steel Wear track depth commonly used in the prior art is 1.23 μm in dynamic area, is compared it can be seen that the present embodiment
Alloy material wear-resisting property it is more preferable.
The shared mass percent of each component in the NiCrBSi alloy: Cr 11%, B 2%, Si 2%, C are
0.3%, Fe 4%, remaining is Ni.
The screen size of the NiCrBSi alloy and spherical cast tungsten carbide is 45 μm~150 μm.
In the spherical cast tungsten carbide, granularity D accounts for 20% for 150 μm of 125 μm≤D <'s, 125 μm of 75 μm≤D <'s
65% is accounted for, 75 μm of 45 μm≤D <'s accounts for 15%.Setting can be improved the powder feeding efficiency in weld deposit process in this way, while can make
Overlay cladding more evenly, and optimization design tungsten carbide particle size and ratio so that particle gap filling is fuller, knot of tissue
Structure is fine and close, appropriate to reduce cutter ring matrix hardness (hardness HRC45-50), improves cutter ring matrix toughness, and ballistic work 27-30J is mentioned
The high wear-resisting property and toughness of cutter ring.
The NiCrBSi alloy through atomization process be it is spherical, the spherical cast tungsten carbide through spheroidising be it is spherical.Ball
The tungsten carbide performance of shape design is stablized, and has higher anti-crack ability.Fig. 5 is the tungsten carbide overlay cladding of routine casting, and Fig. 6 is
There is crackle in the application wear resistant alloy material overlay cladding, under the same conditions, the tungsten carbide overlay cladding of routine casting, and this Shen
Please wear resistant alloy material overlay cladding but without crackle.
In the present embodiment, the NiCrBSi alloy rigidity is HRC42, and the spherical cast tungsten carbide microhardness is
2700HV。
A kind of wear-resisting cutter ring plasma surfacing technique of shield machine, comprising the following steps:
A. cleaning treatment: blasting treatment is carried out to cutter ring outer rim, removes rust staining, greasy dirt and the oxidation of cutter ring outer fringe surface
Skin, then using remaining fine sand on compressed air cleaning cutter ring ontology；
B. the pre-heat treatment: heating cutter ring ontology, and preheating temperature is 350 DEG C~400 DEG C；
C. adjust the bead-welding technology parameter of welding machine: turning arc current is 100~150A, and back ground current is 25~35A, and voltage is
28~32V, plasma gas flow be 8~10SCFH, shield gas flow rate be 16~20SCFH, powder feeding gas flow be 8~
10SCFH, powder feed rate are 10~20g/min, and built-up welding speed is 300~500mm/min；
D. welding gun positions: welding gun being directed at cutter ring blade, positioner and plasma gun is adjusted, makes plasma gun
It is vertical with the holding of cutter ring outer rim side, and apart from cutter ring outer rim 10~15mm of side；
E. start built-up welding: firstly, starting numerical control built-up welding program, is fixed on the plasma gun of electroplating equipment wielding machine on hand with built-up welding
Track program reciprocally swinging, cutter ring ontology carry out circular-rotation with positioner, and the plasma beam of plasma gun will be wear-resisting
Alloy powder and cutter ring blade are heated rapidly and are melted together, mix, spread, and plasma beam leaves rear alloy pool from Quench
But, one layer of high performance wearable overlay is formed；Then, adjustment positioner to horizontal revolving stage, caller continues built-up welding
At the top of cutter ring outer rim；Finally, overturning cutter ring ontology, caller continue the another side of built-up welding cutter ring outer circle；
F. heat preservation cooling: being put into heat preservation chest for cutter ring ontology, slow cooling is covered using ceramic wool insulation cotton, to cutter ring sheet
After temperature is cooled to lower than 150 DEG C, it is air-cooled to open heat-preservation cotton progress.
The wear-resisting cutter ring plasma surfacing technique of shield machine includes programmable digital controlling plasma build-up welding apparatus, the number
Controlling plasma surfacing device includes welding manipulator 1, positioner 2 and digitlization plasma welding machine 3.
The welding manipulator 1 is six axis welding manipulators, has the function of off-line programming software and online importing program,
The positioner 2 is two axis positioners, has the function of anti-and rotation two of inclining, the digitlization plasma welding
Machine 3 has the function of visual edit and storage plasma surfacing parameter.
Embodiment two
A kind of wear resistant alloy material, including NiCrBSi alloy and spherical cast tungsten carbide, the NiCrBSi alloy mass
Percentage is 45%, and the spherical cast tungsten carbide mass percent is 55%.Setting can be improved shield machine cutter ring in this way
Wear-resisting property extends cutter ring service life.
The wear resistant alloy material of the present embodiment is carried out reciprocatingly sliding wear test and rushes sliding composite abrasion test:
1. reciprocatingly slide wear test: the overlay cladding wear scar width of reciprocating friction times N=2000 time, the present embodiment is
0.37mm, H13 mould steel wear scar width 0.67mm commonly used in the prior art compare the alloy material it can be seen that the present embodiment
Wear-resisting property is more preferable.
2. rushing sliding composite abrasion test: impact wear times N=15000 time, the overlay cladding impact zone and cunning of the present embodiment
Without obvious polishing scratch, H13 mould steel Wear track depth commonly used in the prior art is 1.23 μm in dynamic area, is compared it can be seen that the present embodiment
Alloy material wear-resisting property it is more preferable.
The shared mass percent of each component in the NiCrBSi alloy: Cr 15%, B 3%, Si 3.5%, C
For 0.6%, Fe 5%, remaining is Ni.
The screen size of the NiCrBSi alloy and spherical cast tungsten carbide is 45 μm~150 μm.
In the spherical cast tungsten carbide, granularity D accounts for 30% for 150 μm of 125 μm≤D <'s, 125 μm of 75 μm≤D <'s
60% is accounted for, 75 μm of 45 μm≤D <'s accounts for 10%.Setting can be improved the powder feeding efficiency in weld deposit process in this way, while can make
Overlay cladding more evenly, and optimization design tungsten carbide particle size and ratio so that particle gap filling is fuller, knot of tissue
Structure is fine and close, appropriate to reduce cutter ring matrix hardness (hardness HRC45-50), improves cutter ring matrix toughness, and ballistic work 29-33J is mentioned
The high wear-resisting property and toughness of cutter ring.
The NiCrBSi alloy through atomization process be it is spherical, the spherical cast tungsten carbide through spheroidising be it is spherical.Ball
The tungsten carbide performance of shape design is stablized, and has higher anti-crack ability, referring to figs. 5 and 6.
The NiCrBSi alloy rigidity is greater than HRC48, and the spherical cast tungsten carbide microhardness is 2750HV.
A kind of wear-resisting cutter ring plasma surfacing technique of shield machine, comprising the following steps:
A. cleaning treatment: blasting treatment is carried out to cutter ring outer rim, removes rust staining, greasy dirt and the oxidation of cutter ring outer fringe surface
Skin, then using remaining fine sand on compressed air cleaning cutter ring ontology；
B. the pre-heat treatment: heating cutter ring ontology, and preheating temperature is 350 DEG C~400 DEG C；
C. adjust the bead-welding technology parameter of welding machine: turning arc current is 100~150A, and back ground current is 25~35A, and voltage is
28~32V, plasma gas flow be 8~10SCFH, shield gas flow rate be 16~20SCFH, powder feeding gas flow be 8~
10SCFH, powder feed rate are 10~20g/min, and built-up welding speed is 300~500mm/min；
D. welding gun positions: welding gun being directed at cutter ring blade, positioner and plasma gun is adjusted, makes plasma gun
It is vertical with the holding of cutter ring outer rim side, and apart from cutter ring outer rim 10~15mm of side；
E. start built-up welding: firstly, starting numerical control built-up welding program, is fixed on the plasma gun of electroplating equipment wielding machine on hand with built-up welding
Track program reciprocally swinging, cutter ring ontology carry out circular-rotation with positioner, and the plasma beam of plasma gun will be wear-resisting
Alloy powder and cutter ring blade are heated rapidly and are melted together, mix, spread, and plasma beam leaves rear alloy pool from Quench
But, one layer of high performance wearable overlay is formed；Then, adjustment positioner to horizontal revolving stage, caller continues built-up welding
At the top of cutter ring outer rim；Finally, overturning cutter ring ontology, caller continue the another side of built-up welding cutter ring outer circle；
F. heat preservation cooling: being put into heat preservation chest for cutter ring ontology, slow cooling is covered using ceramic wool insulation cotton, to cutter ring sheet
After temperature is cooled to lower than 150 DEG C, it is air-cooled to open heat-preservation cotton progress.
The wear-resisting cutter ring plasma surfacing technique of shield machine includes programmable digital controlling plasma build-up welding apparatus, the number
Controlling plasma surfacing device includes welding manipulator 1, positioner 2 and digitlization plasma welding machine 3.
The welding manipulator 1 is six axis welding manipulators, has the function of off-line programming software and online importing program,
The positioner 2 is two axis positioners, has the function of anti-and rotation two of inclining, the digitlization plasma welding
Machine 3 has the function of visual edit and storage plasma surfacing parameter.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this
The protection scope of application.
Claims (10)
1. a kind of wear resistant alloy material, it is characterised in that: including NiCrBSi alloy and spherical cast tungsten carbide, the NiCrBSi
Alloy mass percentage is 35%~45%, and the spherical cast tungsten carbide mass percent is 55%~65%.
2. a kind of wear resistant alloy material as described in claim 1, which is characterized in that each component in the NiCrBSi alloy
Shared mass percent: it be 1.5%~3%, Si be 2%~4%, C is 0~0.6%, Fe 0 that Cr, which is 10%~15%, B,
~5%, remaining is Ni.
3. a kind of wear resistant alloy material as described in claim 1, which is characterized in that the NiCrBSi alloy and spherical cast
The screen size of tungsten carbide is 45 μm~150 μm, in spherical cast tungsten carbide, and granularity D is accounting for for 150 μm of 125 μm≤D <
125 μm of < of 20%~30%, 75 μm≤D account for 55%~65%, and 75 μm of 45 μm≤D <'s accounts for 10%~20%.
4. a kind of wear resistant alloy material as described in claim 1, which is characterized in that the NiCrBSi alloy is through atomization process
To be spherical, the spherical cast tungsten carbide is spherical through spheroidising.
5. a kind of wear resistant alloy material as described in claim 1, which is characterized in that the NiCrBSi alloy rigidity is greater than
HRC40, the spherical cast tungsten carbide microhardness are not less than 2700HV.
6. a kind of prepare the wear-resisting cutter ring of shield machine using wear resistant alloy material described in claim 1~6 any claim
Plasma surfacing technique, which comprises the following steps:
A. cleaning treatment: blasting treatment is carried out to cutter ring outer rim, removes rust staining, greasy dirt and the oxide skin of cutter ring outer fringe surface；
B. the pre-heat treatment: cutter ring ontology is heated；
C. the bead-welding technology parameter of welding machine is adjusted；
D. welding gun positions: keeping plasma gun vertical with the holding of cutter ring outer rim side, and apart from cutter ring outer rim 10~15mm of side；
E. start built-up welding: plasma surfacing is carried out to cutter ring blade and external knife ring edge two sides；
F. heat preservation cooling: being put into incubator for cutter ring ontology, slow cooling is covered using ceramic wool insulation cotton, to cutter ring body temperature
It is carried out after being cooled to lower than 150 DEG C air-cooled.
7. a kind of wear-resisting cutter ring plasma surfacing technique of shield machine as claimed in claim 6, which is characterized in that in step b
Preheating temperature is 350 DEG C~400 DEG C.
8. a kind of wear-resisting cutter ring plasma surfacing technique of shield machine as claimed in claim 6, which is characterized in that in step c
Bead-welding technology parameter are as follows: turning arc current is 100~150A, and back ground current is 25~35A, and voltage is 28~32V, plasma gas
Flow is 8~10SCFH, and shield gas flow rate is 16~20SCFH, and powder feeding gas flow is 8~10SCFH, powder feed rate 10
~20g/min, built-up welding speed are 300~500mm/min.
9. a kind of wear-resisting cutter ring plasma surfacing technique of shield machine as claimed in claim 6, which is characterized in that including programmable
Digital controlling plasma build-up welding apparatus, the digital controlling plasma build-up welding apparatus include welding manipulator (1), positioner (2) and
It digitizes plasma welding machine (3).
10. a kind of wear-resisting cutter ring plasma surfacing technique of shield machine as claimed in claim 9, which is characterized in that the weldering
Welding manipulator (1) is six axis welding manipulators, has the function of that off-line programming software and online importing program, the welding become
Position machine (2) is two axis positioners, has the function of anti-and rotation two of inclining, the digitlization plasma welding machine (3) has
Visual edit and the function of storing plasma surfacing parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910874413.5A CN110421242A (en) | 2019-09-17 | 2019-09-17 | A kind of wear resistant alloy material and the wear-resisting cutter ring plasma surfacing technique of shield machine |
Applications Claiming Priority (1)
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| CN110802311A (en) * | 2019-11-12 | 2020-02-18 | 济南重工股份有限公司 | Wear-resistant and impact-resistant treatment method for hob ring of shield machine |
| CN110814670A (en) * | 2019-12-17 | 2020-02-21 | 常熟市恒丰机械制造有限公司 | Machining process of cutter head of shield tunneling machine |
| CN111318864A (en) * | 2020-03-04 | 2020-06-23 | 南宁弗纳姆智能科技有限公司 | Sugarcane cutter processing technology |
| CN111843146A (en) * | 2020-08-06 | 2020-10-30 | 威海浩洋机械制造有限公司 | Welding method for wear-resistant materials |
| CN113210817A (en) * | 2021-05-23 | 2021-08-06 | 桂林市中锐特机械制造有限责任公司 | Method for surfacing high-hardness wear-resistant layer on blow-in drill bit |
| CN116944682A (en) * | 2023-09-20 | 2023-10-27 | 中铁工程服务有限公司 | Laser surfacing process of wear-resistant cutter ring of shield machine and wear-resistant cutter ring |
| CN117066501A (en) * | 2023-08-14 | 2023-11-17 | 中铁工程服务有限公司 | Wear-resistant alloy material, shield wear-resistant ring and shield machine |
| CN117210782A (en) * | 2023-09-18 | 2023-12-12 | 上海本希焊研智能科技有限公司 | Plasma cladding equipment suitable for drill bit and cladding process thereof |
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| CN110802311A (en) * | 2019-11-12 | 2020-02-18 | 济南重工股份有限公司 | Wear-resistant and impact-resistant treatment method for hob ring of shield machine |
| CN110814670A (en) * | 2019-12-17 | 2020-02-21 | 常熟市恒丰机械制造有限公司 | Machining process of cutter head of shield tunneling machine |
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| CN111843146A (en) * | 2020-08-06 | 2020-10-30 | 威海浩洋机械制造有限公司 | Welding method for wear-resistant materials |
| CN113210817A (en) * | 2021-05-23 | 2021-08-06 | 桂林市中锐特机械制造有限责任公司 | Method for surfacing high-hardness wear-resistant layer on blow-in drill bit |
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| CN117066501B (en) * | 2023-08-14 | 2024-03-12 | 中铁工程服务有限公司 | Wear-resistant alloy material, shield wear-resistant ring and shield machine |
| CN117210782A (en) * | 2023-09-18 | 2023-12-12 | 上海本希焊研智能科技有限公司 | Plasma cladding equipment suitable for drill bit and cladding process thereof |
| CN117210782B (en) * | 2023-09-18 | 2024-03-08 | 上海本希焊研智能科技有限公司 | Plasma cladding equipment suitable for drill bit and cladding process thereof |
| CN116944682A (en) * | 2023-09-20 | 2023-10-27 | 中铁工程服务有限公司 | Laser surfacing process of wear-resistant cutter ring of shield machine and wear-resistant cutter ring |
| CN116944682B (en) * | 2023-09-20 | 2024-01-09 | 中铁工程服务有限公司 | Laser surfacing process of wear-resistant cutter ring of shield machine and wear-resistant cutter ring |
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Application publication date: 20191108 |