CN109468547A - A kind of high-ductility abrasion-proof inner rotating-shuttle and preparation method thereof - Google Patents
A kind of high-ductility abrasion-proof inner rotating-shuttle and preparation method thereof Download PDFInfo
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- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The present invention relates to sewing machine accessories, and in particular to a kind of high-ductility abrasion-proof inner rotating-shuttle and preparation method thereof.The solution of the present invention contains suitable Nb, V, S element using Fe~Cr~Ni~Mo~Mn alloy material as matrix；And each element content weight percent are as follows: carbon content is 0~0.08%；Chromium content is 10~24%；Nickel content is 8~12%；Molybdenum content is 0~4%；Manganese content is 0~4%；Content of niobium is 0~1%；Content of vanadium is 0~2%, and sulfur content is 0~1%, and surplus is iron.Present invention reduces the consumption of raw material and processing cost, high production efficiency.Thus more suitable for extensive utility value practical, and that there is industry.
Description
Technical field
The present invention relates to sewing machine accessories, and in particular to a kind of high-ductility abrasion-proof inner rotating-shuttle and preparation method thereof.
Background technique
In current sewing device, the most universal with the sewing machine that lock-type chain stitch sutures, most of these sewing machines are to adopt
With rotating shuttle, wire loop is caught on its spur, while expanding wire loop, and wire loop is guided to surround shuttle and constituted lock-type chain stitch.It is interior
Shuttle and outer shuttle are the important spare parts of rotating shuttle, rotating shuttle components small volume, and structure is complicated, so refining journey to production
Degree requires relatively high.
The interior shuttle of existing sewing-machine rotating shuttle commonly uses 20CrMo or 20Cr material to carry out turn-milling cutting and is made, 20CrMo
Or 20Cr has good machinability.But, complex process loaded down with trivial details using the full processing procedure production manufacturing procedure of turn-milling cutting technique
(up to 300 multiple working procedures), equipment investment is big, and manpower consumption is high, and large-scale production process flow is long, at high cost, metal material
Utilization rate is low.
Therefore, existing inner rotating-shuttle technology of preparing scheme starts using Metal Injection Molding.Metal injection moulding skill
Art prepares inner rotating-shuttle technical solution and generallys use high-carbon low-alloy steel, usually contain 1.5~2.5% nickel elements, 0.2~
The chromium of 0.8% molybdenum element and lower content, manganese element, this material have the spy that sintered density is high, yield strength is high, elongation percentage is low
Point
Machining is combined to be made or the direct inner rotating-shuttle made of turn-milling cutting Metal Injection Molding, after
Extended meeting uses carburizing or carbonitriding heat-treatment protocol to improve the purpose of intensity or surface hardness, meets the wear-resisting of sewing machine
Performance.But there are surface hardness is relatively low or uneven 600- after both material carburizing or carbonitriding process
700HV, cementation zone is thicker (0.3-0.4mm), and core hardness is higher, product be easy to appear stress concentrate, brittle fracture
Risk, and blank still needs to the subsequent processings processes such as polishing~pickling~chromium plating after the heat treatment of above two scheme, to meet rotation
Suo Neisuo corrosion resistance and wearability requirement.Surface treatment procedure is complicated, and material corrosion resistance is low, perishable in polishing acid cleaning process
, there is the bad orders phenomenon such as hole, pit in erosion.
Summary of the invention
In view of defect existing for above-mentioned existing inner rotating-shuttle and preparation method thereof, the present inventor is based on being engaged in such product
Manufacture and design practical experience and professional knowledge abundant for many years, and cooperate the utilization of scientific principle, is subject to research and innovation, actively to create
If a kind of new inner rotating-shuttle and preparation method thereof, can improve existing interior shuttle performance and preparation method thereof, make it with more tough
Property, wear-resisting property.By constantly studying, designing, and after being studied and being improved repeatedly, this hair having practical value is createed
It is bright.
The present invention provides a kind of new interior shuttle and preparation method thereof, and the technical problem to be solved is that so that it is met interior shuttle function
It can property, the requirement of usability long-life.The interior shuttle has high surface hardness 700-2000HV, high tenacity matrix.
Preparation method of the invention, the technical problem to be solved is that make it use metal powder injection molded technology direct
The interior shuttle matrix of final shape is prepared, machine-finish allowance and process is reduced, reduces the consumption and processing cost of raw material,
High production efficiency, thus more suitable for practical, and with the utility value in industry.By adding suitable element and use
Sintering appropriate and heat treatment improve the density of material, improve the consistency and yield rate of product, material prepared it is close
Degree is greater than 96%, and the dimensional accuracy of product is ± 0.15%, thus more practical.
The following technical solution is employed for the object of the invention to solve the technical problems to realize.It is proposed according to the present invention
Interior shuttle contains suitable Nb, V, S element using Fe~Cr~Ni~Mo~Mn alloy material as matrix；And each element content
Weight percent are as follows: carbon content is 0~0.08%；Chromium content is 10~24%；Nickel content is 8~12%；Molybdenum content be 0~
4%；Manganese content is 0~4%；Content of niobium is 0~1%；Content of vanadium is 0~2%, and sulfur content is 0~1%, and surplus is iron.
The present invention preferably, the high-ductility abrasion-proof inner rotating-shuttle, contained each element content weight percent are as follows: carbon content
It is 0.03~0.05%；Chromium content is 16~20%；Nickel content is 10~11%；Molybdenum content is 2~3%；Manganese content be 2~
3%；Content of niobium is 0.4~0.6%；Content of vanadium is 0.8~1.2%, and sulfur content is 0.4~0.6%, and surplus is iron.
High-ductility abrasion-proof inner rotating-shuttle of the present invention is most preferably contained each element content weight percent are as follows: carbon contains
Amount is 0.04%；Chromium content is 18%；Nickel content is 10.5%；Molybdenum content is 2.5%；Manganese content is 2.6%；Content of niobium is
0.53%；Content of vanadium is 0.9%, and sulfur content 0.5%, surplus is iron.
High-ductility abrasion-proof inner rotating-shuttle of the invention, another preferred embodiment are that the interior shuttle matrix surface has following surfaces
One of process layer: (1) nitration case, 700~2000HV of surface hardness, nitride layer depth are 0.001~0.2mm；(2) carbon heat
Reaction-diffusion terms layer, diffusion layer include NbC, VC, Cr7C3The metals carbon object such as one of or several seeps coating composition, surface hardness
700~2000HV, diffusion layer depth are 0.001~0.2mm.(3) hydrogeneous or non-hydrogen diamond film plating layer, coating layer thickness are
0.0005-0.1mm, surface hardness are 800~2000HV.
The present invention also provides the preparation methods of the high-ductility abrasion-proof inner rotating-shuttle, comprising the following steps:
(1) pre-alloyed powder that D80 is less than 22um is made using high pressure gas atomization or water-gas combined atomization method；
(2) by pre-alloyed powder and organic matter binding agent in the case where 170~200 DEG C of temperature are by shearing force stirring 50~
80min carries out mixing, is uniformly mixed and pelletizes；
(3) by mold, by feeding, high-voltage high-speed is configured to inner rotating-shuttle green compact in the molten state, and injection moulding speed 60~
120mm/s；
(4) by inner rotating-shuttle green compact at a temperature of 100~140 DEG C, in hydrionic inert gas shielding environment
Carry out catalysis degreasing, 8~12h of degreasing time；
(5) inner rotating-shuttle degreasing blank is carried out in 800 DEG C or less progress thermal debindings and and in 1300~1400 DEG C of high temperature
Sintering, protective atmosphere is argon gas, obtains sintered blank after keeping the temperature 10~300min；
(6) inner rotating-shuttle for meeting size tolerance requirements is made by techniques such as subsequent shaping, machinings；
(7) above-mentioned inner rotating-shuttle is carried out at deburring polishing using vibro-grinding, centrifugation grinding, flow-type grinding method
Reason；
(8) cure process is carried out using internal shuttle surface any in following three kinds of methods:
A. glow discharge nitriding, QPQ or gas nitriding technology carry out surface carburization processing in internal shuttle matrix；
B. thermal response is carried out in internal shuttle matrix using thermal response diffusion (TD salt bath process) technology and spreads carbonization treatment；
C. cure process is carried out using the internal shuttle matrix surface of DLC coating technology；
Above-mentioned technical proposal, a kind of high-ductility abrasion-proof rotating shuttle of the present invention and preparation method thereof at least have the advantage that
1, using Gao Ge, nickel and stainless steel alloy material, interior shuttle matrix toughness is good, and corrosion resistance is good.
2, the cementation zone that surface hardness is apparently higher than prior art level can be made by Surface hardening treatment technology,
Up to 700~2000HV；Interior shuttle after surface treated has splendid corrosion resistance and wear-resisting property.
3, raw material availability is high, and product size precision high (± 0.15%) is, it can be achieved that high efficiency, the low cost of interior shuttle are raw
It produces.
In conclusion a kind of high-ductility abrasion-proof rotating shuttle of the present invention and preparation method thereof, using metal powder injection molded technology
The interior shuttle for directly preparing final shape is greatly decreased subsequent mechanical processing, reduces the consumption and processing cost of raw material, raw
It produces high-efficient.Shuttle in prepared work, 700~2000HV of surface hardness, product size precision is high (± 0.15%), and high tenacity is not
It is easily broken, corrosion resistance and wearability are good.It has the advantages that above-mentioned many and practical value, and in similar preparation method
It there are no similar design to publish or use and really belong to innovation, no matter all having in preparation method or in function biggish
It improves, technically has large improvement, and produce handy and practical effect, and more existing interior shuttle and preparation method thereof
Have effects that the multinomial of enhancement, thus more suitable for practical, and the extensive utility value with industry, be really one novel, progress,
Practical new design.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, with presently preferred embodiments of the present invention, detailed description is as follows below.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated, and protection scope of the present invention is not limited in this
A little embodiments.
Embodiment 1
D50 is made between 7-9um using water-vapour combined atomizing method, D80 is less than the pre-alloyed powder of 22um, in advance
Alloy powder is the ingredient of following weight: carbon content 0.03%；Chromium content is 19%；Nickel content is 10.5%；Molybdenum
Content is 2.5%；, content of niobium 2%；Content of vanadium is 1.1%, and sulfur content 0.3%, surplus is iron.By pre-alloyed powder with
Organic matter binding agent stirring 80min in the case where 185 DEG C of temperature are by shearing force carries out mixing, is uniformly mixed and pelletizes；Pass through
Feeding is configured to inner rotating-shuttle green compact by mold in the molten state, and 195 DEG C of material temperature, injection speed 100mm/s, 95 DEG C of mould temperature；
By inner rotating-shuttle green compact at a temperature of 140 DEG C, have 1.4 × 10-3It is carried out in the hydrionic nitrogen gas protection environment of mol/L
Catalysis degreasing, degreasing time 10h；Inner rotating-shuttle degreasing blank is subjected to 1335 DEG C of high temperature sinterings under argon atmosphere protection, is protected
Sintered blank is obtained after warm 120min；Add by processes such as subsequent inner hole shaping, verticality shapings, and by the processing of core slot, guide rail
The inner rotating-shuttle for meeting size tolerance requirements is made in the techniques such as work；Above-mentioned inner rotating-shuttle is gone using flow-type grinding method
Burr polishing treatment, polishing time 4h；Surface hardening treatment, salt temperature 440 are carried out using QPQ salt-bath nitriding-oxidation technology
DEG C, the time 6 hours.Obtained interior shuttle density 7.7g/cm3, surface hardness 1000HV, nitride layer depth 0.05mm.
Embodiment 2
D50 is made between 11-13um using aerosolization method, D80 is less than the pre-alloyed powder of 26um, prealloy powder
End is the ingredient of following weight: carbon content 0.01%；Chromium content is 18%；Nickel content is 10.5%；Content of niobium is
2%；Content of vanadium is 1.1%, and sulfur content 0.3%, surplus is iron.By pre-alloyed powder and organic matter binding agent in 195 DEG C of temperature
Degree carries out mixing by stirring 60min under shearing force, is uniformly mixed and pelletizes；By mold by feeding in the molten state
It is configured to inner rotating-shuttle green compact, 185 DEG C of material temperature, injection speed 80mm/s, 120 DEG C of mould temperature；By inner rotating-shuttle green compact in 130 DEG C of temperature
Under degree, have 2.4 × 10-3Catalysis degreasing, degreasing time 8h are carried out in the hydrionic nitrogen gas protection environment of mol/L；It will
Inner rotating-shuttle degreasing blank carries out 1360 DEG C of high temperature sinterings under argon atmosphere protection, obtains sintered blank after keeping the temperature 180min；It is logical
Later continue the processes such as inner hole shaping, verticality shaping, and be made by techniques such as the processing of core slot, guide rail processing and meet dimensional tolerance
It is required that inner rotating-shuttle；Deburring polishing treatment, polishing time 2h are carried out to above-mentioned inner rotating-shuttle using centrifugation grinding method；It adopts
Surface hardening treatment is carried out with carbon-thermal reduction diffusion technique (TD salt bath process), 1000 DEG C of salt temperature, the time 6 hours.It is obtained
Interior shuttle density 7.7g/cm3, surface hardness 1800HV, thermal response diffusion layer depth is 0.01mm.
Embodiment 3
D50 is made between 8-9um using water atomization process, D80 is less than the pre-alloyed powder of 22um, pre-alloyed powder
For the ingredient of following weight: carbon content 0.01%；Chromium content is 16%；Nickel content is 10.5%；Content of niobium is
2%；Content of vanadium is 1.1%, and sulfur content 0.6%, surplus is iron.By pre-alloyed powder and organic matter binding agent in 195 DEG C of temperature
Degree carries out mixing by stirring 120min under shearing force, is uniformly mixed and pelletizes；By mold by feeding in molten condition
Under be configured to inner rotating-shuttle green compact, 195 DEG C of material temperature, injection speed 60mm/s, 120 DEG C of mould temperature；By inner rotating-shuttle green compact at 130 DEG C
At a temperature of, have 2.4 × 10-3Catalysis degreasing, degreasing time 6h are carried out in the hydrionic nitrogen gas protection environment of mol/L；
Inner rotating-shuttle degreasing blank is subjected to 1360 DEG C of high temperature sinterings under argon atmosphere protection, obtains sintered blank after keeping the temperature 240min；
By processes such as subsequent inner hole shaping, verticality shapings, and it is made by techniques such as the processing of core slot, guide rail processing and meets size public affairs
The inner rotating-shuttle that difference requires；Deburring polishing treatment, polishing time 2h are carried out to above-mentioned inner rotating-shuttle using centrifugation grinding method；
Surface hardening treatment is carried out using DLC coating technology, device therefor is that gas ion source enhances magnetron sputtering apparatus, obtained interior
Shuttle density 7.7g/cm3, surface hardness 1800HV, DLC coating layer thickness is 0.005mm.
Embodiment 4
D50 is made between 11-13um using aerosolization method, D80 is less than the pre-alloyed powder of 26um, prealloy powder
End is the ingredient of following weight: carbon content 0.01%；Chromium content is 16%；Nickel content is 10.5%；Content of niobium is
4%；Content of vanadium is 1.1%, and sulfur content 0.6%, surplus is iron.By pre-alloyed powder and organic matter binding agent in 195 DEG C of temperature
Degree carries out mixing by stirring 120min under shearing force, is uniformly mixed and pelletizes；By mold by feeding in molten condition
Under be configured to inner rotating-shuttle green compact, 195 DEG C of material temperature, injection speed 60mm/s, 120 DEG C of mould temperature；By inner rotating-shuttle green compact at 130 DEG C
At a temperature of, catalysis degreasing, degreasing time 6h are carried out in there is the hydrionic nitrogen gas protection environment of 2.4 × 10-3mol/L；
Inner rotating-shuttle degreasing blank is subjected to 1360 DEG C of high temperature sinterings under argon atmosphere protection, obtains sintered blank after keeping the temperature 240min；
By processes such as subsequent inner hole shaping, verticality shapings, and it is made by techniques such as the processing of core slot, guide rail processing and meets size public affairs
The inner rotating-shuttle that difference requires；Deburring polishing treatment, polishing time 2h are carried out to above-mentioned inner rotating-shuttle using centrifugation grinding method；
Surface hardening treatment is carried out using ion nitriding technology, device therefor is furnace for double-layer metallic glow ion cementation, ammonia pressure
400Pa, 530 DEG C of nitriding temperature, the time 8 hours.Obtained interior shuttle density 7.8g/cm3, surface hardness 1000HV, thermal response expand
Dissipating layer depth is 0.035mm.
Embodiment 5
D50 is made between 11-12um using aerosolization method, D80 is less than the pre-alloyed powder of 24um, prealloy powder
End is the ingredient of following weight: carbon content 0.04%；Chromium content is 18%；Nickel content is 10.5%；Molybdenum content is
2.5%；Manganese content is 2.6%；Content of niobium is 0.53%；Content of vanadium is 0.9%, and sulfur content 0.5%, surplus is iron.It will be pre-
Alloy powder and organic matter binding agent the stirring 120min in the case where 195 DEG C of temperature are by shearing force carry out mixing, are uniformly mixed
And it pelletizes；Feeding is configured to inner rotating-shuttle green compact in the molten state by mold, 195 DEG C of material temperature, injection speed 60mm/s,
120 DEG C of mould temperature；By inner rotating-shuttle green compact at a temperature of 130 DEG C, have 2.4 × 10-3The hydrionic nitrogen gas protection of mol/L
Catalysis degreasing, degreasing time 6h are carried out in environment；Inner rotating-shuttle degreasing blank is subjected to 1360 DEG C of height under argon atmosphere protection
Temperature sintering, obtains sintered blank after keeping the temperature 240min；Add by processes such as subsequent inner hole shaping, verticality shapings, and by core slot
The inner rotating-shuttle for meeting size tolerance requirements is made in the techniques such as work, guide rail processing；Using centrifugation grinding method in above-mentioned rotating shuttle
Shuttle carries out deburring polishing treatment, polishing time 2h；Surface hardening treatment is carried out using DLC coating technology, device therefor is gas
Body ion source enhances magnetron sputtering apparatus, obtained interior shuttle density 7.7g/cm3, surface hardness 1850HV, DLC coating layer thickness is
0.004mm。
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (4)
1. a kind of high-ductility abrasion-proof inner rotating-shuttle, characterized in that the inner rotating-shuttle uses Fe~Cr~Ni~Mo~Mn alloy material
Material is used as matrix, and contained each element content weight percent are as follows: carbon content is 0~0.08%；Chromium content is 10~24%；Nickel
Content is 8~12%；Molybdenum content is 0~4%；Manganese content is 0~4%；Content of niobium is 0~1%；Content of vanadium is 0~2%, sulphur
Content is 0~1%, and surplus is iron.
2. high-ductility abrasion-proof inner rotating-shuttle according to claim 1, characterized in that contained each element content weight percent
Are as follows: carbon content is 0.03~0.05%；Chromium content is 16~20%；Nickel content is 10~11%；Molybdenum content is 2~3%；Manganese contains
Amount is 2~3%；Content of niobium is 0.4~0.6%；Content of vanadium is 0.8~1.2%, and sulfur content is 0.4~0.6%, and surplus is iron.
3. high-ductility abrasion-proof inner rotating-shuttle according to claim 2, characterized in that contained each element content weight percent
Are as follows: carbon content 0.04%；Chromium content is 18%；Nickel content is 10.5%；Molybdenum content is 2.5%；Manganese content is 2.6%；Niobium
Content is 0.53%；Content of vanadium is 0.9%, and sulfur content 0.5%, surplus is iron.
4. the preparation method of high-ductility abrasion-proof inner rotating-shuttle described in claims 1 to 3 any one claim, characterized in that
The following steps are included:
(1) pre-alloyed powder that D80 is less than 26um is made using high pressure gas atomization or water-gas combined atomization method；
(2) by pre-alloyed powder and organic matter binding agent in the case where 170~200 DEG C of temperature are by shearing force stirring 50~
80min carries out mixing, is uniformly mixed and pelletizes；
(3) by mold, by feeding, high-voltage high-speed is configured to inner rotating-shuttle green compact in the molten state, and injection moulding speed 60~
120mm/s；
(4) it by inner rotating-shuttle green compact at a temperature of 100~140 DEG C, is carried out in hydrionic inert gas shielding environment
Catalysis degreasing, 8~12h of degreasing time；
(5) by inner rotating-shuttle degreasing blank carry out 800 DEG C or less progress thermal debindings with and in 1300~1400 DEG C of high temperature sinterings,
Protective atmosphere is argon gas, obtains sintered blank after keeping the temperature 0~300min；
(6) inner rotating-shuttle for meeting size tolerance requirements is made by techniques such as subsequent shaping, machinings.
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Cited By (1)
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| CN109877311A (en) * | 2019-04-17 | 2019-06-14 | 泉州天智合金材料科技有限公司 | A kind of MIM is injection moulded high-end cutter, metal powder and preparation method thereof |
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| CN102962459A (en) * | 2012-11-27 | 2013-03-13 | 浙江一火科技有限公司 | Method for manufacturing rotating shuttle inner shuttle through injection molding method |
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Application publication date: 20190315 |