CN107419186A - A kind of manufacture method of helical gear - Google Patents

A kind of manufacture method of helical gear Download PDF

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Publication number
CN107419186A
CN107419186A CN201710291601.6A CN201710291601A CN107419186A CN 107419186 A CN107419186 A CN 107419186A CN 201710291601 A CN201710291601 A CN 201710291601A CN 107419186 A CN107419186 A CN 107419186A
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CN
China
Prior art keywords
powder
sintered products
helical gear
metallic sintered
mixed
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Pending
Application number
CN201710291601.6A
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Chinese (zh)
Inventor
宁上中
刘爱民
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Zhangjiagang Zhen Jiang Sintered Metal Product Co Ltd
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Zhangjiagang Zhen Jiang Sintered Metal Product Co Ltd
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Priority to CN201710291601.6A priority Critical patent/CN107419186A/en
Publication of CN107419186A publication Critical patent/CN107419186A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • B22F5/085—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs with helical contours
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention discloses a kind of manufacture method of the helical gear of hardness for improving finished product, intensity and wearability, its step is：1) by mass percentage, raw material containing 95.15~96.15% iron, 1.3%~1.7% copper, 1.45~1.95% nickel, 0.3%~0.6% molybdenum, 0.3%~0.6% carbon, 0.3%~0.7% rare earth element is mixed, obtains alloy iron-based mixed-powder；2) green compact are pressed into；3) green sintering is formed into metallic sintered products in non-oxidizing atmosphere；4) annealed in non-oxidizing atmosphere, annealing temperature is controlled between 750~1080 DEG C, and annealing soaking time control was at 50~120 minutes；5) metallic sintered products are extruded, its maximum extrusion deformation degree in diametric(al) is controlled more than 2%, and the density domination of metallic sintered products is in 6.7~6.9g/cm3Between；6) mechanical process；7) it is heat-treated；8) grind, obtain finished product.Manufacture method of the present invention is particularly suitable for use in the manufacture of instrument helical gear.

Description

A kind of manufacture method of helical gear
Technical field
The present invention relates to a kind of manufacture method of metallic sintered products, and in particular to a kind of manufacturer of helical gear Method.
Background technology
So-called metallic sintered products, refer to metal mixed powder is pressed into various finished products using mould.Current spiral Gear, generally all it is to use traditional machine-tooled method, not only production process is more complicated, cost is higher；Moreover, it is obtained into Product hardness is relatively low, intensity and wearability are all inadequate, so as to substantially reduce the service life of helical gear.
The content of the invention
The technical problems to be solved by the invention are：A kind of spiral for improving finished product hardness, intensity and wearability is provided The manufacture method of gear.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of manufacture method of helical gear, it is walked Suddenly it is：
1) by mass percentage, by containing 95.15~96.15% iron, 1.3%~1.7% copper, 1.45~ 1.95% nickel, 0.3%~0.6% molybdenum, 0.3%~0.6% carbon, the raw material of 0.3%~0.7% rare earth element are mixed Close, wherein, molybdenum, nickel are added in the form of iron alloy powder or element powder, and the iron of surplus is added in the form of water-atomized iron powder, copper with The form of element powder is added, and carbon is added in the form of graphite powder；Specifically mixing process is：First by the water atomization of 40~60% weight Iron powder is fitted into mixed powder machine, then adds rare earth element, copper, molybdenum and nickel, then, remaining water atomization iron is added into mixed powder machine Powder, after stirring, then graphite powder and appropriate micro mist wax and binding agent are added and mixed in powder machine, sieved after stirring, Place at least 12 hours, obtain alloy iron-based mixed-powder；
2) the alloy iron-based mixed-powder is pressed into helical gear green compact on press；
3) compressing helical gear green compact are sintered under the protection of non-oxidizing gas, forms metallic sintered products；
4) annealed under the protection of non-oxidizing gas, annealing temperature is controlled between 750~1080 DEG C, when annealing is incubated Between control at 50~120 minutes；
5) metallic sintered products after annealing are extruded, its control of maximum extrusion deformation degree in diametric(al) exists More than 2%, the density domination of metallic sintered products is in 6.7~6.9g/cm3Between；
6) metallic sintered products are machined out with processing；
7) metallic sintered products after mechanical process are put into progress carbo-nitriding processing in carburizer, then 850 ± 5 DEG C, be incubated more than 2 hours under conditions of carbon potential 0.7 ± 0.1, then, metallic sintered products are sent into tempering furnace, are heated to 180 ~200 DEG C of progress tempers, are incubated more than 1 hour；
8) metallic sintered products surface vibration is ground, obtains finished product.
It is described to powder in steps of 5 in a kind of manufacture method of described helical gear as a kind of preferred scheme The metallurgical part in end is carried out in extrusion process, and its maximum extrusion deformation degree in diametric(al) is controlled between 2~5%.
As a kind of preferred scheme, in a kind of manufacture method of described helical gear, described rare earth element is cerium Or lanthanum.
As a kind of preferred scheme, in a kind of manufacture method of described helical gear, described non-oxidizing gas For the mixed gas of hydrogen and nitrogen, the percent by volume of nitrogen accounts for more than the 92% of the cumulative volume of mixed gas.
The beneficial effects of the invention are as follows：It is of the invention compared with traditional machining, helical gear of the present invention uses Alloy iron-based mixed-powder forms by compacting, sintering, machining, heat treatment and surface grinding successively, obtained helical gear Hardness is high, intensity is big, wearability is good, can greatly prolong its service life, moreover, also simplify technique, improves production efficiency With the utilization rate of material, manufacturing cost is reduced.
Embodiment
With reference to specific embodiment, a kind of the specific of manufacture method of helical gear of the present invention is described in detail Embodiment.
Embodiment one：
1) by mass percentage, prepare 50 kilograms of water-atomized iron powders, 47.4 kilograms of iron alloy powder (nickel account for 1.5 kilograms, Molybdenum accounts for 0.6 kilogram), 1.7 kilograms of copper powder, 580 grams of graphite powders, 320 grams of cerium powder；
First take 25 kilograms of water-atomized iron powder to be fitted into mixed powder machine, then, whole iron alloy powders, copper powder and cerium powder are added In mixed powder machine, remaining water-atomized iron powder then is added into mixed powder machine, after stirring, then by graphite powder, appropriate micro mist Wax and binding agent are added in mixed powder machine, are sieved after stirring, and are placed 12 hours, are obtained alloy iron-based mixed-powder；
2) the alloy iron-based mixed-powder is pressed into helical gear green compact on press；
3) compressing helical gear green compact are sintered under the protection of non-oxidizing gas, form metallic sintered products, In sintering process, by micro mist wax and binding agent burn off；
4) annealed under the protection of non-oxidizing gas, annealing temperature is controlled between 750~1080 DEG C, when annealing is incubated Between control at 60~90 minutes；
5) metallic sintered products after annealing are extruded, its maximum extrusion deformation degree in diametric(al) is controlled 2 More than~5%, the density domination of metallic sintered products is in 6.7~6.9g/cm3Between；
6) metallic sintered products are machined out with processing；
7) metallic sintered products after mechanical process are put into progress carbo-nitriding processing in carburizer, then 850 ± 5 DEG C, be incubated more than 2 hours under conditions of carbon potential 0.7 ± 0.1, then, metallic sintered products are sent into tempering furnace, are heated to 180 ~200 DEG C of progress tempers, are incubated more than 1 hour；
8) metallic sintered products surface vibration is ground, obtains finished product.
Embodiment two：
1) 50 kilograms of water-atomized iron powders by mass percentage, are prepared, (nickel accounts for 1.7 kilograms, molybdenum to 48 kilograms of iron alloy powder Account for 0.3 kilogram), 1.3 kilograms of copper powder, 320 grams of graphite powders, 380 grams of cerium powder；
First take 25 kilograms of water-atomized iron powder to be fitted into mixed powder machine, then, whole iron alloy powders, copper powder and cerium powder are added In mixed powder machine, remaining water-atomized iron powder then is added into mixed powder machine, after stirring, then by graphite powder, appropriate micro mist Wax and binding agent are added in mixed powder machine, are sieved after stirring, and are placed 13 hours, are obtained alloy iron-based mixed-powder；
2) the alloy iron-based mixed-powder is pressed into helical gear green compact on press；
3) compressing helical gear green compact are sintered under the protection of non-oxidizing gas, form metallic sintered products, In sintering process, by micro mist wax and binding agent burn off；
4) annealed under the protection of non-oxidizing gas, annealing temperature is controlled between 750~1080 DEG C, when annealing is incubated Between control at 70~100 minutes；
5) metallic sintered products after annealing are extruded, its maximum extrusion deformation degree in diametric(al) is controlled 2 More than~5%, the density domination of metallic sintered products is in 6.7~6.9g/cm3Between；
6) metallic sintered products are machined out with processing；
7) metallic sintered products after mechanical process are put into progress carbo-nitriding processing in carburizer, then 850 ± 5 DEG C, be incubated more than 2 hours under conditions of carbon potential 0.7 ± 0.1, then, metallic sintered products are sent into tempering furnace, are heated to 180 ~200 DEG C of progress tempers, are incubated more than 1 hour；
8) metallic sintered products surface vibration is ground, obtains finished product.
Embodiment three：
1) 50 kilograms of water-atomized iron powders by mass percentage, are prepared, (nickel accounts for 1.85 thousand to 47.3 kilograms of iron alloy powder Gram, molybdenum account for 0.3 kilogram), 1.5 kilograms of copper powder, 580 grams of graphite powders, 620 grams of cerium powder；
First take 25 kilograms of water-atomized iron powder to be fitted into mixed powder machine, then, whole iron alloy powders, copper powder and cerium powder are added In mixed powder machine, remaining water-atomized iron powder then is added into mixed powder machine, after stirring, then by graphite powder, appropriate micro mist Wax and binding agent are added in mixed powder machine, are sieved after stirring, and are placed 14 hours, are obtained alloy iron-based mixed-powder；
2) the alloy iron-based mixed-powder is pressed into helical gear green compact on press；
3) compressing helical gear green compact are sintered under the protection of non-oxidizing gas, form metallic sintered products, In sintering process, by micro mist wax and binding agent burn off；
4) annealed under the protection of non-oxidizing gas, annealing temperature is controlled between 750~1080 DEG C, when annealing is incubated Between control at 90~120 minutes；
5) metallic sintered products after annealing are extruded, its maximum extrusion deformation degree in diametric(al) is controlled 2 More than~5%, the density domination of metallic sintered products is in 6.7~6.9g/cm3Between；
6) metallic sintered products are machined out with processing；
7) metallic sintered products after mechanical process are put into progress carbo-nitriding processing in carburizer, then 850 ± 5 DEG C, be incubated more than 2 hours under conditions of carbon potential 0.7 ± 0.1, then, metallic sintered products are sent into tempering furnace, are heated to 180 ~200 DEG C of progress tempers, are incubated more than 1 hour；
8) metallic sintered products surface vibration is ground, obtains finished product.
In practical application, described hydrogen and nitrogen mixed gas in, the percent by volume of nitrogen accounts for mixed gas More than the 92% of cumulative volume.
In summary, only presently preferred embodiments of the present invention, is not used for limiting the scope that the present invention is implemented, it is all according to The equivalent changes and modifications that shape, construction, feature and spirit described in scope of the invention as claimed are made, this all should be included in In the right of invention.

Claims (4)

1. a kind of manufacture method of helical gear, its step are：
1) by mass percentage, 95.15~96.15% iron, 1.3%~1.7% copper, 1.45~1.95% will be contained Nickel, 0.3%~0.6% molybdenum, 0.3%~0.6% carbon, the raw material of 0.3%~0.7% rare earth element are mixed, wherein, Molybdenum, nickel are added in the form of iron alloy powder or element powder, and the iron of surplus is added in the form of water-atomized iron powder, and copper is with element powder Form is added, and carbon is added in the form of graphite powder；Specifically mixing process is：First the water-atomized iron powder of 40~60% weight is loaded In mixed powder machine, rare earth element, copper, molybdenum and nickel are then added, then remaining water-atomized iron powder is added into mixed powder machine, is stirred Afterwards, graphite powder and appropriate micro mist wax and binding agent are added in mixed powder machine, sieved after stirring, it is small to place at least 12 When, obtain alloy iron-based mixed-powder；
2) the alloy iron-based mixed-powder is pressed into helical gear green compact on press；
3) compressing helical gear green compact are sintered under the protection of non-oxidizing gas, forms metallic sintered products；
4) annealed under the protection of non-oxidizing gas, annealing temperature is controlled between 750~1080 DEG C, soaking time control of annealing System was at 50~120 minutes；
5) metallic sintered products after annealing are extruded, its in diametric(al) maximum extrusion deformation degree control 2% with On, the density domination of metallic sintered products is in 6.7~6.9g/cm3Between；
6) metallic sintered products are machined out with processing；
7) metallic sintered products after mechanical process are put into carburizer progress carbo-nitriding processing, then 850 ± 5 DEG C, More than 2 hours are incubated under conditions of carbon potential 0.7 ± 0.1, then, metallic sintered products are sent into tempering furnace, it is heated to 180~ 200 DEG C of progress tempers, are incubated more than 1 hour；
8) metallic sintered products surface vibration is ground, obtains finished product.
2. according to the manufacture method of the helical gear described in claim 1, it is characterised in that：It is described to powder in steps of 5 The metallurgical part in end is carried out in extrusion process, and its maximum extrusion deformation degree in diametric(al) is controlled between 2~5%.
3. according to the manufacture method of the helical gear described in claim 1, it is characterised in that：Described rare earth element be cerium or Lanthanum.
4. according to the manufacture method of the helical gear described in claim 1, it is characterised in that：Described non-oxidizing gas are The mixed gas of hydrogen and nitrogen, the percent by volume of nitrogen account for more than the 92% of the cumulative volume of mixed gas.
CN201710291601.6A 2017-04-28 2017-04-28 A kind of manufacture method of helical gear Pending CN107419186A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108480644A (en) * 2018-04-12 2018-09-04 金华市宇辰粉末冶金有限公司 A kind of full-automatic production equipment special and production method of powder metallurgical helical gear
CN115283677A (en) * 2022-07-27 2022-11-04 浙江迅达工业科技股份有限公司 Preparation system and preparation method of powder metallurgy part

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JPS6057482B2 (en) * 1979-05-17 1985-12-16 住友電気工業株式会社 Manufacturing method for iron-based sintered machine parts
GB2324803A (en) * 1997-04-30 1998-11-04 Nippon Piston Ring Co Ltd Synchroniser ring
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CN104028765A (en) * 2014-06-27 2014-09-10 张家港振江粉末冶金制品有限公司 Powder metallurgy component and production method of powder metallurgy component with through hole
CN104070160A (en) * 2014-06-30 2014-10-01 张家港振江粉末冶金制品有限公司 Powder metallurgy duplicate gear and preparation method for same
CN104889403A (en) * 2015-06-05 2015-09-09 东睦新材料集团股份有限公司 Method for manufacturing iron-based powder metallurgy components
CN104972127A (en) * 2015-07-02 2015-10-14 东睦新材料集团股份有限公司 Method for preparing powder metallurgy striking block
CN105014077A (en) * 2014-04-17 2015-11-04 东睦新材料集团股份有限公司 Preparation method of powder metallurgical gear and chain wheel

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Publication number Priority date Publication date Assignee Title
US4170474A (en) * 1978-10-23 1979-10-09 Pitney-Bowes Powder metal composition
JPS6057482B2 (en) * 1979-05-17 1985-12-16 住友電気工業株式会社 Manufacturing method for iron-based sintered machine parts
CA1166043A (en) * 1979-08-20 1984-04-24 Yew-Tsung Chen Process for producing a powder metal part
GB2324803A (en) * 1997-04-30 1998-11-04 Nippon Piston Ring Co Ltd Synchroniser ring
CN1907603A (en) * 2006-08-08 2007-02-07 海门市常乐粉末冶金厂 Manufacture method and die for powder metallurgy inside spin ratchet wheel
CN104001924A (en) * 2014-03-20 2014-08-27 建德市易通金属粉材有限公司 Iron-based alloy premix for metal injection forming
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108480644A (en) * 2018-04-12 2018-09-04 金华市宇辰粉末冶金有限公司 A kind of full-automatic production equipment special and production method of powder metallurgical helical gear
CN115283677A (en) * 2022-07-27 2022-11-04 浙江迅达工业科技股份有限公司 Preparation system and preparation method of powder metallurgy part
CN115283677B (en) * 2022-07-27 2024-01-26 浙江迅达工业科技股份有限公司 Preparation system and preparation method of powder metallurgy part

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Application publication date: 20171201