CN107262722A - A kind of manufacture method of powder metallurgical gear or belt wheel - Google Patents

A kind of manufacture method of powder metallurgical gear or belt wheel Download PDF

Info

Publication number
CN107262722A
CN107262722A CN201710357664.7A CN201710357664A CN107262722A CN 107262722 A CN107262722 A CN 107262722A CN 201710357664 A CN201710357664 A CN 201710357664A CN 107262722 A CN107262722 A CN 107262722A
Authority
CN
China
Prior art keywords
belt wheel
outer layer
layer
internal layer
powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710357664.7A
Other languages
Chinese (zh)
Other versions
CN107262722B (en
Inventor
包崇玺
秦晓冬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NBTM New Materials Group Co Ltd
Original Assignee
NBTM New Materials Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NBTM New Materials Group Co Ltd filed Critical NBTM New Materials Group Co Ltd
Priority to CN201710357664.7A priority Critical patent/CN107262722B/en
Publication of CN107262722A publication Critical patent/CN107262722A/en
Application granted granted Critical
Publication of CN107262722B publication Critical patent/CN107262722B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten

Landscapes

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

Abstract

The present invention relates to the manufacture method of a kind of powder metallurgical gear or belt wheel, composition of this method including designing material, compacting, sintering process, wherein, gear or belt wheel are designed to internal layer, outer layer and intermediate layer and carry out Material composition design to different layers, compared with prior art, the advantage of the invention is that：Intermediate layer is using damping metal alloy, damping metal alloy is connected with ectonexine, outer layer part of the force is delivered to internal layer by damping metal alloy, when gear or belt wheel rotation, reduce vibration, the reliability of ectonexine connection is added, the vibration damping of tooth or belt wheel is solved the problems, such as, improves the service life of gear or belt wheel.

Description

A kind of manufacture method of powder metallurgical gear or belt wheel
Technical field
The invention belongs to powder metallurgical technology, and in particular to a kind of manufacture method of powder metallurgical gear or belt wheel.
Background technology
The development trend of automobile industry is reduction energy consumption, reduces discharge, and therefore especially traditional fuel-engined vehicle, reduces The discharge capacity of automobile, the performance of lifting engine just seems particularly main, and the main force that three-cylinder engine will turn into industry starts Machine, still, three-cylinder engine are uneven due to operating, and engine noise itself is big, and vibration is big, and occupant comfort is poor, in order to subtract Few shake, vibration often needs to devise balance shaft, offsets the imbalance of cylinder body, to give full play to the saving of three cylinder machines, low cost Advantage, singly balanced axle, which can be balanced, accounts for the vibration of whole vibration ratio sizable single order, the vibration of engine is obtained substantially Improve, the gear or belt wheel of balance shaft are generally steel processing, but the gear or belt wheel noise of steel processing are big, and process is long, Cost is high；Powder metallurgical gear or belt wheel manufacturing process are short, and cost is low, due to containing certain hole, can effectively reduce and make an uproar Sound, but noise level is still higher, can not meet automobile industry to noise, the requirement of vibration.
For supporting the damping element of gear to be usually the damping element based on rubber in conventional art, pass through rubber The elasticity of body and the hysteresis loss decay vibrational energy of itself.At present, with advances in technology, various damping elements are used for branch Gear is supportted to realize more preferable vibration damping, vibration isolating effect；Such as, automobile engineering o. 11th in 2007 is described《Engine crankshaft is multistage The design of rubber damping formula torsional vibration damper》, the design reports a kind of crankshaft pulley, using embedding between wheel hub and belt pulley Enter rubber parts, moment of torsion is transmitted by rubber；Between metal wheel hub, belt pulley and rubber can using direct mechanical snap or Glue sticking adds the mode of vulcanization to combine, and the bond strength of the latter is better than the former.Due to rubber intensity in itself and temperature tolerance ratio gold What is belonged to is low, therefore, and the failure of gear or belt wheel is particularly likely that rubber fails, in addition, the adhesive strength of metal and rubber also can Influence the use of part.
Accordingly, it would be desirable to develop new technique, solve the problems, such as the vibration damping of powder metallurgy product, this for powder metallurgical gear, The application of belt wheel has vital meaning.
The content of the invention
The technical problem to be solved by the invention for the present situation of prior art is to provide a kind of powder metallurgical gear or band The manufacture method of wheel, efficiently solves the vibration damping problem of powder metallurgical gear or belt wheel.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：A kind of manufacture of powder metallurgical gear or belt wheel Method, it is characterised in that comprise the following steps：
1) gear or belt wheel include outer layer, internal layer and the intermediate layer being arranged between outer layer and internal layer, the outer layer Composition is copper：0~5%, carbon：0~1.5%, nickel：0~5.0%, molybdenum：0~3.0%, chromium：0~3.0%, no more than 2% not Evitable impurity, iron：Surplus；Intermediate layer is damping metal alloy；The composition of the internal layer is：Copper：0~5%, carbon：0~ 1.5%, nickel：0~4.0%, molybdenum：0~3.0%, chromium：0~3.0%, the inevitable impurity no more than 2%, iron：Surplus； The internal layer is internal layer powder or steel or aluminium alloy；
2) the internal layer powder matched, outer layer powder in batch mixer be sufficiently mixed respectively obtaining internal layer mixed powder Material and outer layer mixed powder；
3) suppress：By step 2) obtained by internal layer mixed powder and outer layer mixed powder respectively in room temperature or less than 130 DEG C The internal layer and outer layer green compact of compressing gear or belt wheel in mould are placed in, forming pressure is 500~800MPa, the life after shaping Base density is 6.8~7.3g/cm3；
4) sinter：The internal layer and outer layer green compact of the gear of gained or belt wheel are placed in sintering furnace and be sintered, sintering temperature Spend for 1050 DEG C~1250 DEG C, soaking time is more than 20min, sintering atmosphere is nitrogen and hydrogen mixture atmosphere；
5) it is heat-treated：The outer layer progress induction heat treatment of sintered blank or carburizing are heat-treated and be tempered；
6) it is machined：The gear or belt wheel after heat treatment are machined to internal layer, outer layer according to drawing technical requirements And intermediate layer elastic conjunction is integrated, matching allowance is less than 1.0mm；
7) intermediate laminate is attached to outer layer inner radius, then internal layer is press fit into intermediate layer inner radius, or first by internal layer external diameter Intermediate layer inner radius formation assembly is press fit into, then assembly is press fit into outer layer inner radius；
8) finish：Gear or belt wheel size are finished.
Preferably, the step 1) in internal layer powder composition be：Copper：0~5%, carbon：0~1.5%, nickel：0~ 4.0%, molybdenum：0~3.0%, chromium：0~3.0%, the inevitable impurity no more than 2%, iron：Surplus.
Preferably, the step 1) described in damping metal alloy be Damping Cast Iron, Mn-Cu alloys, magnesium alloy, kirsite Or pure magnesium.
Preferably, the step 7) press-fit for hot pressing dress or be cold-pressed dress.
Preferably, the step 1) intermediate layer is shaped as annular.
Preferably, the step 1) intermediate layer inside and outside hole wall on process breach, correspondingly, have in the position of ectonexine The projection being engaged with the breach in intermediate layer.
Preferably, the step 1) intermediate layer inside and outside hole wall on process projection, correspondingly, have in the position of ectonexine The breach being engaged with the projection in intermediate layer.
Further preferably, the raised and breach is interference fitted.
Compared with prior art, the advantage of the invention is that：Intermediate layer between gear or the ectonexine of belt wheel is using resistance Buddhist nun's metal alloy, improves the intensity and heat resistance of gear or belt wheel, is connected while damping metal alloy with ectonexine, outside When layer part of the force is delivered to internal layer, gear or belt wheel rotation by damping metal, vibration is reduced, ectonexine connection is added Reliability, solve the problems, such as the vibration damping of tooth or belt wheel, improve the service life of gear or belt wheel, structure and rational technology are real With.
Brief description of the drawings
Fig. 1 is the structural representation of powder metallurgical gear of the embodiment of the present invention or belt wheel；
Fig. 2 is profiles of the Fig. 1 along A-A directions；
Fig. 3 is the structural representation of Fig. 1 middle gears or belt wheel outer layer；
Fig. 4 is profiles of the Fig. 3 along B-B directions；
Fig. 5 is Fig. 1 middle gears or the structural representation in belt wheel intermediate layer；
Fig. 6 is profiles of the Fig. 5 along C-C directions；
Fig. 7 is the structural representation of internal layer in Fig. 1；
Fig. 8 is profiles of the Fig. 7 along D-D directions；
Fig. 9 is powder metallurgical gear or the structural representation with wheel belt breach and projection；
Figure 10 is profiles of the Fig. 9 along E-E directions；
Figure 11 is gear or the notched structural representation of belt wheel outer layer；
Figure 12 is profiles of the Figure 11 along F-F directions；
Figure 13 is the raised structural representation of intermediate layer band；
Figure 14 is profiles of the Figure 14 along G-G directions；
Figure 15 is gear or the notched structural representation of belt wheel internal layer；
Figure 16 is profiles of the Figure 13 along H-H directions.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment 1
As shown in Figures 1 to 8, the manufacture method of the powder metallurgical gear in the present embodiment comprises the following steps：
1) gear includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For copper：2%, carbon：0.8%, nickel：1.0%, molybdenum：0.5%, chromium：1.5%, the inevitable impurity no more than 2%, iron：It is remaining Amount；Intermediate layer 2 is HT250 cast irons, is shaped as annular；The composition of internal layer 3 is：Copper：2%, carbon：0.3%, no more than 2% Inevitable impurity, iron：Surplus；
2) powder of internal layer 3 matched, the powder of outer layer 1 in batch mixer be sufficiently mixed respectively obtaining internal layer 3 and mixing Close powder and the mixed powder of outer layer 1, reunion and segregation that the mixed powder of internal layer 3 and the mixed powder of outer layer 1 are visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of internal layer 3 and the mixed powder of outer layer 1 be placed in mould at room temperature respectively In the compressing green compact of internal layer 3 for obtaining gear and the green compact of outer layer 1, forming pressure is 600MPa, and the green density after shaping is 7.0g/cm3；
4) sinter：The green compact of internal layer 3 of the gear of gained and the green compact of outer layer 1 are respectively placed in be sintered in sintering furnace and obtained The ectonexine of sintered blank, sintering temperature is 1120 DEG C, soaking time 30 minutes, and sintering protective atmosphere is nitrogen and hydrogen mixture atmosphere；
5) it is heat-treated：Induction heat treatment is carried out to the outer layer 1 of sintered blank and is tempered；
6) it is machined：According to drawing technical requirements by the gear mechanism after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) cold pressing of intermediate layer 2 is attached to the inner radius of outer layer 1, then the cold pressing of internal layer 3 is attached to the inner radius of intermediate layer 2；
8) finish：Gear size is finished.
Embodiment 2
1) gear includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, wherein,
The composition of outer layer 1 is copper：1%, carbon：0.3%, nickel：1.0%, the inevitable impurity no more than 2%, iron：It is remaining Amount；The composition of internal layer 3 is：Copper：2%, carbon：0.7%, nickel：2.0%, the inevitable impurity no more than 2%, iron：Surplus； The damping metal alloy in intermediate layer 2 is MnCu alloys, and its composition is：Copper：37%, aluminium：4.25%, iron：3%, nickel：1.5%, Manganese：Surplus；Wherein, intermediate layer 2 is shaped as annular；
2) internal layer 3 matched, the powder of outer layer 1 in batch mixer be sufficiently mixed respectively obtaining the mixed powder of internal layer 3 Material and the mixed powder of outer layer 1, reunion and segregation that the mixed powder of internal layer 3 and the mixed powder of outer layer 1 are visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of internal layer 3 and the mixed powder of outer layer 1 be placed in respectively below 130 DEG C The compressing green compact of internal layer 3 for obtaining gear and the green compact of outer layer 1 in mould, forming pressure is 600MPa, and the green compact after shaping are close Spend for 7.2g/cm3；
4) sinter：The green compact of internal layer 3 of the gear of gained and the green compact of outer layer 1 are respectively placed in be sintered in sintering furnace and obtained The ectonexine of sintered blank, sintering temperature is 1150 DEG C, soaking time 25 minutes, and sintering protective atmosphere is nitrogen and hydrogen mixture atmosphere；
5) it is heat-treated：Carburizing heat treatment is carried out to the outer layer 1 of sintered blank and is tempered；
6) it is machined：According to drawing technical requirements by the gear mechanism after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) the external diameter hot pressing of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly hot pressing is attached to outer layer 1 Inner radius；
8) finish：Gear size is finished.
Embodiment 3
1) belt wheel includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For copper：2.0%, carbon：0.8%, nickel：2.0%, molybdenum：1.5%, the inevitable impurity no more than 2%, iron：Surplus；Internal layer 3 Composition be：Copper：1.5%, carbon：0.5%, the inevitable impurity no more than 2%, iron：Surplus；The damping gold in intermediate layer 2 Category alloy is magnesium alloy Mg7Cu2.3Mn, and intermediate layer 2 is shaped as annular；
2) powder of internal layer 3 matched, the powder of outer layer 1 in batch mixer be sufficiently mixed respectively obtaining internal layer 3 and mixing Close powder and the mixed powder of outer layer 1, reunion and segregation that the mixed powder of internal layer 3 and the mixed powder of outer layer 1 are visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of internal layer 3 and the mixed powder of outer layer 1 be placed in mould at room temperature respectively In the compressing green compact of internal layer 3 for obtaining belt wheel and the green compact of outer layer 1, forming pressure is 500MPa, and the green density after shaping is 7.0g/cm3；
4) green compact of internal layer 3 of belt wheel green compact and the green compact of outer layer 1 are respectively placed in continuous fritting furnace and are sintered, sintering temperature Spend for 1120 DEG C, soaking time 30 minutes, protective atmosphere is quickly to cool down after nitrogen and hydrogen mixture atmosphere, sintering；
5) it is heat-treated：Induction heat treatment is carried out to the outer layer 1 of sintered blank and is tempered；
6) it is machined：According to drawing technical requirements by the belt wheel after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) cold pressing of the external diameter of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly cold pressing is attached to outer layer 1 Inner radius；
8) finish：Belt wheel size is finished.
Embodiment 4
1) gear includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For copper：2.0%, carbon：0.8%, nickel：2.0%, molybdenum：1.5%, the inevitable impurity no more than 2%, iron：Surplus；It is middle The damping metal alloy of layer 2 is that kirsite Zn27Al and intermediate layer 2 are shaped as annular；The composition of internal layer 3 is：Copper： 1.5%, carbon：0.5%, the inevitable impurity no more than 2%, iron：Surplus；
2) powder of internal layer 3 matched, the powder of outer layer 1 in batch mixer be sufficiently mixed respectively obtaining internal layer 3 and mixing Close powder and the mixed powder of outer layer 1, reunion and segregation that the mixed powder of internal layer 3 and the mixed powder of outer layer 1 are visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of internal layer 3 and the mixed powder of outer layer 1 be placed in mould at room temperature respectively In the compressing green compact of internal layer 3 for obtaining gear and the green compact of outer layer 1, forming pressure is 500MPa, and the green density after shaping is 7.0g/cm3；
4) green compact of internal layer 3 of gear green compact and the green compact of outer layer 1 are respectively placed in continuous fritting furnace and are sintered, sintering temperature Spend for 1120 DEG C, soaking time 30 minutes, protective atmosphere is quickly to cool down after nitrogen and hydrogen mixture atmosphere, sintering；
5) it is heat-treated：Carburization Treatment is carried out to the outer layer 1 of sintered blank and is tempered；
6) it is machined：According to drawing technical requirements by the gear mechanism after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) the external diameter hot pressing of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly hot pressing is attached to outer layer 1 Inner radius；
8) finish：Gear size is finished.
Embodiment 5
1) belt wheel includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For copper：2.0%, nickel：2.0%, molybdenum：1.5%, the inevitable impurity no more than 2%, iron：Surplus；The damping in intermediate layer 2 Metal alloy is that kirsite Zn27Al and intermediate layer 2 are shaped as annular；Internal layer 3 is aluminium alloy；
2) powder of outer layer 1 matched is carried out being sufficiently mixed in batch mixer and obtains the mixed powder of outer layer 1, outer layer 1 is mixed Close reunion and segregation that powder is visible by naked eyes；
3) suppress：By step 2) gained the mixed powder of outer layer 1 compressing in mould obtain is placed in below 130 degrees Celsius The green compact of belt wheel outer layer 1, forming pressure is 800MPa, and the green density after shaping is 6.8g/cm3；
4) internal layer 3 of belt wheel green compact and the green compact of outer layer 1 are respectively placed in continuous fritting furnace and be sintered, sintering temperature is 1050 DEG C, soaking time 30 minutes, protective atmosphere is nitrogen and hydrogen mixture atmosphere, is quickly cooled down after sintering；
5) it is heat-treated：Induction heat treatment and tempering are carried out to the outer layer 1 of sintered blank；
6) it is machined：According to drawing technical requirements by the belt wheel after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) cold pressing of the external diameter of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly cold pressing is attached to outer layer 1 Inner radius；
8) finish：Belt wheel size is finished.
Embodiment 6
1) gear includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For carbon：1.5%, molybdenum：3%, chromium：3%, the inevitable impurity no more than 2%, iron：Surplus；Intermediate layer 2 is pure magnesium and shape Shape is annular；Internal layer 3 is 20CrMo steel；
2) powder of outer layer 1 matched in batch mixer be sufficiently mixed respectively obtaining the mixed powder of outer layer 1, outer layer Reunion and segregation that 1 mixed powder is visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of outer layer 1 be placed in compressing in mould obtain at room temperature respectively The green compact of outer layer 1 of gear, forming pressure is 800MPa, and the green density after shaping is 6.8g/cm3；
4) internal layer 3 of gear green compact and the green compact of outer layer 1 are respectively placed in continuous fritting furnace and be sintered, sintering temperature is 1250 DEG C, soaking time 30 minutes, protective atmosphere is nitrogen and hydrogen mixture atmosphere, is quickly cooled down after sintering；
5) it is heat-treated：Induction heat treatment is carried out to the outer layer 1 of sintered blank and is tempered；
6) it is machined：According to drawing technical requirements by the gear mechanism after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) the external diameter hot pressing of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly hot pressing is attached to outer layer 1 Inner radius；
8) finish：Gear size is finished.
Embodiment 7
1) belt wheel includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For copper：5.0%, molybdenum：3%, nickel：5%, chromium：3%, the inevitable impurity no more than 2%, iron：Surplus；Intermediate layer 2 is zinc Alloy Zn27Al and intermediate layer 2 are shaped as annular；Internal layer 3 is copper：5.0%, carbon：1.5%, nickel：4.0%, molybdenum：3%, Chromium：3%, the inevitable impurity no more than 2%, iron：Surplus；
2) powder of internal layer 3 matched, the powder of outer layer 1 in batch mixer be sufficiently mixed respectively obtaining internal layer 3 and mixing Close powder and the mixed powder of outer layer 1, reunion and segregation that the mixed powder of internal layer 3 and the mixed powder of outer layer 1 are visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of internal layer 3 and the mixed powder of outer layer 1 be placed in mould at room temperature respectively In the compressing green compact of internal layer 3 for obtaining belt wheel and the green compact of outer layer 1, forming pressure is 800MPa, and the green density after shaping is 7.3g/cm3；
4) internal layer 3 of belt wheel green compact and the green compact of outer layer 1 are respectively placed in continuous fritting furnace and be sintered, sintering temperature is 1250 DEG C, soaking time 30 minutes, protective atmosphere is nitrogen and hydrogen mixture atmosphere, is quickly cooled down after sintering；
5) it is heat-treated：Induction heat treatment and tempering are carried out to the outer layer 1 of sintered blank；
6) it is machined：According to drawing technical requirements by the belt wheel after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) cold pressing of the external diameter of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly cold pressing is attached to outer layer 1 Inner radius；
8) finish：Belt wheel size is finished.
Embodiment 8
1) gear includes outer layer 1, internal layer 3 and the intermediate layer 2 being arranged between outer layer 1 and internal layer 3, the composition of outer layer 1 For copper：3.0%, molybdenum：2%, nickel：4%, the inevitable impurity no more than 2%, iron：Surplus；Intermediate layer 2 is magnesium alloy Mg7Cu2.3Mn, and intermediate layer 2 is shaped as annular；Internal layer 3 is carbon：1.5%, molybdenum：2%, nickel：2%, chromium：2%, do not surpass Cross 2% inevitable impurity, iron：Surplus；
2) powder of internal layer 3 matched, the powder of outer layer 1 in batch mixer be sufficiently mixed respectively obtaining internal layer 3 and mixing Close powder and the mixed powder of outer layer 1, reunion and segregation that the mixed powder of internal layer 3 and the mixed powder of outer layer 1 are visible by naked eyes；
3) suppress：By step 2) obtained by the mixed powder of internal layer 3 and the mixed powder of outer layer 1 be placed in mould at room temperature respectively In the compressing green compact of internal layer 3 for obtaining gear and the green compact of outer layer 1, forming pressure is 700MPa, and the green density after shaping is 7.3g/cm3；
4) internal layer 3 of gear green compact and the green compact of outer layer 1 are respectively placed in continuous fritting furnace and be sintered, sintering temperature is 1200 DEG C, soaking time 30 minutes, protective atmosphere is nitrogen and hydrogen mixture atmosphere, is quickly cooled down after sintering；
5) it is heat-treated：Induction heat treatment and tempering are carried out to the outer layer 1 of sintered blank；
6) it is machined：According to drawing technical requirements by the gear mechanism after heat treatment be machined to internal layer, outer layer and in Interbed energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) cold pressing of the external diameter of internal layer 3 is attached to the inner radius of intermediate layer 2 and obtains assembly, then assembly cold pressing is attached to outer layer 1 Inner radius；
8) finish：Gear size is finished.
Embodiment 9
As shown in Fig. 9 to Figure 16, the manufacture method and the difference of above-described embodiment of the powder metallurgy belt wheel in the present embodiment Part is：In step 1) intermediate layer 2 inside and outside hole wall on process projection, correspondingly, set in the position of internal layer and outer layer It is equipped with the breach being engaged with the projection in intermediate layer and raised and breach interference fit.In the present embodiment, the external diameter of internal layer 3 3 the first breach 31 are provided with, the internal diameter of outer layer 1 is provided with 3 the second breach 11, intermediate layer 2 to be formed and internal layer 3 respectively The first projection 41 and the second projection 42 that first breach 31 and the breach 11 of outer layer 1 second are engaged, the first breach 31 and first are convex 41 interference fits are played, the second breach 11 and the second projection 42 are interference fitted.
Can also be using in step 1 in the present embodiment) intermediate layer inside and outside hole wall on process breach, correspondingly, inside The position of outer layer is provided with the projection being engaged with the breach in intermediate layer, raised and breach interference fit.

Claims (8)

1. the manufacture method of a kind of powder metallurgical gear or belt wheel, it is characterised in that comprise the following steps：
1) gear or belt wheel include outer layer, internal layer and the intermediate layer being arranged between outer layer and internal layer, the composition of the outer layer For copper：0~5%, carbon：0~1.5%, nickel：0~5.0%, molybdenum：0~3.0%, chromium：0~3.0%, can not keep away no more than 2% The impurity exempted from, iron：Surplus；Intermediate layer is damping metal alloy；The composition of the internal layer is：Copper：0~5%, carbon：0~1.5%, Nickel：0~4.0%, molybdenum：0~3.0%, chromium：0~3.0%, the inevitable impurity no more than 2%, iron：Surplus；In described Layer is internal layer powder or steel or aluminium alloy；
2) by the internal layer powder matched, outer layer powder respectively in batch mixer carry out be sufficiently mixed obtain internal layer mixed powder and Outer layer mixed powder；
3) suppress：By step 2) obtained by internal layer mixed powder and outer layer mixed powder be placed in respectively in room temperature or less than 130 DEG C The internal layer green compact and outer layer green compact of compressing gear or belt wheel in mould, forming pressure are 500~800MPa, the life after shaping Base density is 6.8~7.3g/cm3；
4) sinter：The internal layer and outer layer green compact of the gear of gained or belt wheel are placed in sintering furnace and be sintered, sintering temperature is 1050 DEG C~1250 DEG C, soaking time is more than 20min, and sintering atmosphere is nitrogen and hydrogen mixture atmosphere；
5) it is heat-treated：The outer layer progress induction heat treatment of sintered blank or carburizing are heat-treated and be tempered；
6) it is machined：According to drawing technical requirements by the gear or belt wheel after heat treatment be machined to internal layer, outer layer and Intermediate layer energy elastic conjunction is integrated, and matching allowance is less than 1.0mm；
7) intermediate laminate is attached to outer layer inner radius, then internal layer is press fit into intermediate layer inner radius, or first press-fit internal layer external diameter Outer layer inner radius is press fit into intermediate layer inner radius formation assembly, then by assembly；
8) finish：Gear or belt wheel size are finished.
2. the manufacture method of powder metallurgical gear according to claim 1 or belt wheel, it is characterised in that：The step 1) in Internal layer powder composition be：Copper：0~5%, carbon：0~1.5%, nickel：0~4.0%, molybdenum：0~3.0%, chromium：0~3.0%, no Inevitable impurity more than 2%, iron：Surplus.
3. the manufacture method of powder metallurgical gear according to claim 1 or belt wheel, it is characterised in that：The step 1) in The damping metal alloy is Damping Cast Iron, Mn-Cu alloys, magnesium alloy, kirsite or pure magnesium.
4. the manufacture method of powder metallurgical gear according to claim 1 or belt wheel, it is characterised in that：The step 7) pressure Fill and dress is filled or be cold-pressed for hot pressing.
5. the manufacture method of powder metallurgical gear according to claim 1 or belt wheel, it is characterised in that：The step 1) in Interbed is shaped as annular.
6. the manufacture method of powder metallurgical gear according to claim 1 or belt wheel, it is characterised in that：The step 1) in Breach is processed on the inside and outside hole wall of interbed, correspondingly, there is the projection being engaged with the breach in intermediate layer in the position of ectonexine.
7. the manufacture method of powder metallurgical gear according to claim 1 or belt wheel, it is characterised in that：The step 1) in Projection is processed on the inside and outside hole wall of interbed, correspondingly, there is the breach being engaged with the projection in intermediate layer in the position of ectonexine.
8. the manufacture method of the powder metallurgical gear or belt wheel according to claim 6 or 7, it is characterised in that：The projection It is interference fitted with breach.
CN201710357664.7A 2017-05-19 2017-05-19 A kind of manufacturing method of powder metallurgical gear or belt wheel Active CN107262722B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710357664.7A CN107262722B (en) 2017-05-19 2017-05-19 A kind of manufacturing method of powder metallurgical gear or belt wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710357664.7A CN107262722B (en) 2017-05-19 2017-05-19 A kind of manufacturing method of powder metallurgical gear or belt wheel

Publications (2)

Publication Number Publication Date
CN107262722A true CN107262722A (en) 2017-10-20
CN107262722B CN107262722B (en) 2019-10-25

Family

ID=60065088

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710357664.7A Active CN107262722B (en) 2017-05-19 2017-05-19 A kind of manufacturing method of powder metallurgical gear or belt wheel

Country Status (1)

Country Link
CN (1) CN107262722B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115323262A (en) * 2022-06-27 2022-11-11 浙江吉森金属科技有限公司 Composite steel for valve plate and manufacturing method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08159240A (en) * 1994-11-30 1996-06-21 Nippon Steel Corp Gear and manufacture thereof
CN101663508A (en) * 2007-04-18 2010-03-03 诺伊曼尔·泰克福尔控股有限公司 Composite body
CN201513206U (en) * 2009-09-16 2010-06-23 东睦（天津）粉末冶金有限公司 Timing gear pulley of powder metallurgy engine camshaft used for automobile
CN103511497A (en) * 2012-06-20 2014-01-15 苏舍摩擦系统(德国)有限责任公司 Synchronizer ring
CN205806326U (en) * 2016-06-29 2016-12-14 神龙汽车有限公司 A kind of balance shaft apparatus of Novel belt vibration-reduction gear
CN106541139A (en) * 2015-09-18 2017-03-29 东睦新材料集团股份有限公司 A kind of preparation method of P/M cam

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08159240A (en) * 1994-11-30 1996-06-21 Nippon Steel Corp Gear and manufacture thereof
CN101663508A (en) * 2007-04-18 2010-03-03 诺伊曼尔·泰克福尔控股有限公司 Composite body
CN201513206U (en) * 2009-09-16 2010-06-23 东睦（天津）粉末冶金有限公司 Timing gear pulley of powder metallurgy engine camshaft used for automobile
CN103511497A (en) * 2012-06-20 2014-01-15 苏舍摩擦系统(德国)有限责任公司 Synchronizer ring
CN106541139A (en) * 2015-09-18 2017-03-29 东睦新材料集团股份有限公司 A kind of preparation method of P/M cam
CN205806326U (en) * 2016-06-29 2016-12-14 神龙汽车有限公司 A kind of balance shaft apparatus of Novel belt vibration-reduction gear

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115323262A (en) * 2022-06-27 2022-11-11 浙江吉森金属科技有限公司 Composite steel for valve plate and manufacturing method thereof
CN115323262B (en) * 2022-06-27 2023-11-03 浙江吉森金属科技有限公司 Composite steel for valve plate and manufacturing method thereof

Also Published As

Publication number Publication date
CN107262722B (en) 2019-10-25

Similar Documents

Publication Publication Date Title
EP1184107B1 (en) Alloyed steel powder for powder metallurgy
JP4183346B2 (en) Mixed powder for powder metallurgy, iron-based sintered body and method for producing the same
KR20050077492A (en) Method to make sinter-hardened powder metal parts with complex shapes
JP2648519B2 (en) Method of manufacturing synchronizer hub
CN104028765A (en) Powder metallurgy component and production method of powder metallurgy component with through hole
CN106584758A (en) Preparation method of encapsulated chain wheel for powder metallurgy
CN107761002B (en) Double-material powder forging gear with gradient layer and preparation method thereof
CN105200322A (en) High-strength automobile part powder metallurgy component and preparation method thereof
CN107321993A (en) A kind of powder metallurgical gear preparation method for being used to share bicycle
JP4702758B2 (en) Sintered sprocket for silent chain and manufacturing method thereof
CN107262722B (en) A kind of manufacturing method of powder metallurgical gear or belt wheel
US11883883B2 (en) Process for manufacturing toroid parts
CN107262720B (en) A kind of manufacturing method of powder metallurgical gear or belt wheel
CN107237877A (en) A kind of preparation method of powder metallurgical gear or belt wheel
JP5936954B2 (en) Manufacturing method of machine parts
CN107262723B (en) A kind of preparation method of powder metallurgical gear or belt wheel
JP6528899B2 (en) Method of manufacturing mixed powder and sintered body for powder metallurgy
CN107262721B (en) A kind of manufacturing method of powder metallurgical gear or belt wheel
CN107043885A (en) A kind of manufacture method of immediate action valve valve element
US11097346B1 (en) Process for manufacturing toroid parts
CN107858604B (en) High-wear-resistance iron-based powder metallurgy internal spline, clutch outer cover and clutch
CN107214340B (en) A kind of preparation method of powder metallurgical gear or belt wheel
CN105983705A (en) Powder metallurgy preparing method for automobile transmission gear
CN111842876A (en) Production process of powder metallurgy gear
WO2018143088A1 (en) Mixed powder for powder metallurgy, sintered body, and method for producing sintered body

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant