CN104728344B - The transmission belt of stepless transmission and its manufacturing method of becket - Google Patents
The transmission belt of stepless transmission and its manufacturing method of becket Download PDFInfo
- Publication number
- CN104728344B CN104728344B CN201410814767.8A CN201410814767A CN104728344B CN 104728344 B CN104728344 B CN 104728344B CN 201410814767 A CN201410814767 A CN 201410814767A CN 104728344 B CN104728344 B CN 104728344B
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- becket
- transmission belt
- mass percent
- surface layer
- transmission
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002344 surface layer Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 28
- 238000012545 processing Methods 0.000 claims description 25
- 229910000734 martensite Inorganic materials 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 5
- 238000005121 nitriding Methods 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 22
- 239000002184 metal Substances 0.000 abstract description 21
- 238000004881 precipitation hardening Methods 0.000 abstract description 5
- 239000011162 core material Substances 0.000 description 23
- 239000000463 material Substances 0.000 description 19
- 238000006396 nitration reaction Methods 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000003483 aging Methods 0.000 description 7
- 230000032683 aging Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000011282 treatment Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
-
- 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
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The becket (32) in transmission belt (3) that the present invention relates to a kind of for stepless transmission, the becket (32) is made of precipitation-hardening metal and is equipped with the core (35) in the nitrided surface layer (34) for being wrapped in becket (32), and the thickness (Tnsl) of the nitrided surface layer is the 24%-28% of the overall thickness (Tr) of becket (32).In addition, the hardness range of the core (35) of becket (32) is in 400HV1.0 to 500HV1.0.
Description
Technical field
This disclosure relates to metal tape cyclic annular and flexible, which is typically incorporated in all-metal transmission belt, to answer
For carrying out power transmission between two adjustable belt wheels of the known stepless transmission or CVT in motor vehicles.It is this
Endless belt is at least also referred to as the metal ring element of transmission belt at it in the application of transmission belt.The disclosure is also related to this metal
The manufacturing method of ring.
Background technique
In certain types of transmission belt (it is also referred to as pushing belt), multiple such beckets are incorporated at least one
In (i.e. radially nested mutually) becket group of (but usually two) stacking.Known pushing belt further include it is multiple slideably
The transverse metal elements being mounted in this ring group.The becket of the prior art is manufactured in the application of its pushing belt by martensite steel,
The steel of the type is also equipped with a possibility that relatively advantageous in addition to other aspects and material is welded and is plastically deformed,
And it is answered with big tensile strength at least after carrying out heat treatment appropriate to material and to abrasion and bending and/or tensioning
Power fatigue it is resistance.
Known becket has the core material of appropriate hardness, to realize resistance good combined to metal fatigue
It draws, the characteristic of buckling and bending strength.The ring core material is wrapped in substantially harder and therefore wear resistant the appearance of becket
In surface layer.The hard outer surface layer is usually by introducing calking nitrogen-atoms (passing through nitrogen treatment) in the metal lattice of ring
To obtain, and it is adequately elastic to limit internal Zernike annular polynomial and there is becket equipped with maximum gauge, so as to which longitudinal direction is curved
The fracture of bent and resisting fatigue.In particular, consistently approve in this field, the range of the thickness value of nitration case should be becket and exist
The 10%-20% of overall thickness radially.The known range discloses in Japanese publication JP 2000-337453-A.Certainly,
Becket transmission belt application in, by during its service life it born it is a large amount of load and bending process,
All these material characteristics are all critically important.
It is in the maximally related feature of ring material the other is the hardness of the core material other than its nitration case.If core material
Too hard, becket just will be too crisp, if core material is too soft, becket cannot resist applied in the operating process of speed changer
Tensile stress.About this ring core hardness, compared with the hardness number 550HV1.0 (Wei measured when applying 1kg gravity of lower limit
Family name's hardness number) or greater value be mainly used in the prior art.Since becket is made of martensite steel, the ring core portion
Hardness number is obtained by the ageing treatment (aging) (passing through precipitation-hardening) of martensite steel ring material.In addition, about ring core
In terms of portion's hardness, European patent application EP2281128-A1 is taught, in the feelings for the martensitic steel alloy for combining particular range
Under condition, lower value actually can be applied to ring core hardness.In the specific background of EP2281128-A1, range is in 400-
The core hardness value of 500HV1.0 and preferably approximately 475 HV1.0, which are taught into, is suitable for transmission belt metal ring element.This phase
Benefit to lower core hardness value is: under given processing temperature, ageing treatment processing request less process time
And/or the sediment that must be included in martensitic steel alloy is formed and/or catalytic elements are less.
Summary of the invention
The disclosure attempts to widen the introduction of EP-2281128-A1, and thus makes the described of relatively low core hardness value
Benefit can be utilized broadly in the art.According to the disclosure, this target following by it is a kind of according to claim 1
Transmission belt metal ring element realize.Therefore, the feature of this new becket is not only in that the relatively low of ring core portion
Hardness number is less than 550HV1.0, preferably smaller than 500HV1.0, is more preferably about 475HV1.0, but also because nitration case
Thickness.In particular, according to the disclosure, relatively thick nitration case is applied, which is becket in gold
Belong to the 22%-30% of the overall thickness of ring radially, the preferably 24%-28% of metal ring thickness, more preferably becket
About the 25% of thickness.In the latter aspect, it should be noted that in general, the gold in the transmission belt application for the becket being presently considered
Belong to ring with a thickness of 0.185mm.However, the scope of application of this ring thickness is 0.15-0.20mm.
Experimentally it has been observed that in the relatively low core hardness value and relatively thick nitration case being presently considered
In the case where combination, which is valuably presented outstanding antifatigue and wear-resistant spy in its described transmission belt application
Property, and the characteristic safely challenge comparison with existing and commonly used transmission belt metal ring element provided by characteristic.Obviously, thick
(thicker) nitration case compensates for the unfavorable effect of low (lower) core hardness value in terms of the fatigue strength of becket.Cause
This, the disclosure is valuably extended by the range of the EP2281128-A1 martensitic steel alloy proposed, to be suitable for providing use
In the relatively low core hardness disclosed in it.In the background of the disclosure, compared with known in EP2281128-A1
The better martensitic steel alloy of cost-effectiveness is adapted as the basic material of the becket new for this, for example, martensite steel at
Point range include mass percent be 17%-19% nickel, mass percent be 4%-6% molybdenum, mass percent be
The aluminium and quality percentage that chromium that the cobalt of 4%-6%, mass percent are 0.5%-1.5%, mass percent are 0.5%-1.5%
Than the titanium less than 0.1% and remaining be iron and inevitable pollutant (such as oxygen, nitrogen, phosphorus matter, silicon etc.).This is latter
The martensite steel ingredient of range has been confirmed as the suitable and beneficial basic material of the becket new for this, because it is combined
Relatively relatively inexpensive (due to relatively low cobalt content) and make becket have outstanding fatigue strength (due to (nominally
) not titaniferous) and the heat treatment that can be combined at one in carried out (i.e. in a smelting furnace and in a processing environment) nitrogen and
The advantages of age-hardening.
Detailed description of the invention
According to the above-mentioned opinion of the disclosure and its application in the metal ring element of transmission belt hereinafter with reference to attached drawing
It describes, in the accompanying drawings:
Fig. 1 provides the example of the schematic description of the well-known stepless transmission equipped with transmission belt,
Fig. 2 is a part to have an X-rayed the transmission belt illustrated,
Fig. 3 provides the outline signal of the presently relevant part of the existing manufacturing method of the metal ring element of transmission belt
Figure,
Fig. 4 is the schematic cross sectional views of existing transmission belt metal ring element,
Fig. 5 provides the related with the position D relative to its outer surface hard of the material of existing transmission belt metal ring element
H is spent, and
Fig. 6 provide the material of the new transmission belt metal ring element according to the disclosure with the position relative to its outer surface
Set the related hardness H of D.
Specific embodiment
Fig. 1 shows the existing nothing in the power train between its engine and driving wheel for being usually applied to motor vehicles
The central part of grade speed changer or CVT.The speed changer includes two belt wheels 1,2, and each belt wheel 1,2 is all provided with that there are two conical bands
Wheel disc 4,5, generally v-shaped groove are limited between described two conical pulley disks 4,5, described two conical pulley disks
4, a disk 4 in 5 can be axially moved along corresponding pulley shaft 6,7 (disk 4 is arranged on the pulley shaft 6,7).It passes
Dynamic band 3 surrounds belt wheel 1,2, and rotary motion ω and adjoint torque T are transferred to another belt wheel 2,1 from a belt wheel 1,2.Become
Fast device also typically includes starter, and the starter applies the corresponding another belt wheel of direction at least one described disk 4
The chucking power Fax of the axial orientation of disk 5, so that band 3 be made to be clamped between disk 4, disk 5.Also, in the revolving speed of driven pulley 2
Speed changer (speed) between the revolving speed of driving pulley 1 is determined than thus.
One example of existing transmission belt 3 is shown specifically in Fig. 2 with its cross-sectional view, which includes two ring groups 31, institute
It states two ring groups 31 and respectively includes one group (in this example) six thin and flat (i.e. lacy) made of martensite steel
Flexible metal ring 32.Transmission belt 3 further includes the lateral direction element 33 of multiple plates being formed from steel, and the lateral direction element 33 is by respectively
Described two ring groups 31 in the corresponding recess portion of lateral direction element 33 keep together.Lateral direction element 33 bears the clamping
Power Fax, so that the friction between disk 4,5 and band 3 is so that drive when input torque Tin is applied on so-called driving pulley 1
The rotation of movable belt pulley 1 is passed to so-called driven pulley 2 via the transmission belt 3 similarly rotated.
In the operating process of CVT, transmission belt 3 and outstanding other becket 32 are subjected to periodically variable tensioning and curved
Transverse stress (i.e. fatigue loads).In general, becket 32 deals with the ability (i.e. the fatigue strength of becket 32) of this fatigue loads
The service life of transmission belt 3 is thereby determined that.Therefore, overall goal long-term in the development of transmission belt manufacturing method is to tie
Desired ring fatigue strength is realized under (basis) material and the smallest situation of processing cost that close.
Fig. 3 shows the mesh of existing overall 3 manufacturing method of transmission belt (i.e. the manufacture of 32 component of becket of transmission belt 3)
Preceding relevant portion, wherein individual procedure of processing is indicated by Roman number.
In the first procedure of processing I, thickness range is usually that the thin piece or plate of the basic material of 0.4mm-0.5mm is bent
At cylindrical shape, and the plate end 12 to merge be soldered in the second procedure of processing II with formed open, hollow cylinder or
Pipe 13.In third procedure of processing III, pipe 13 is annealed.Hereafter, in the 4th procedure of processing IV, pipe 13 is cut into multiple rings
Shape ring 14, the ring-type ring 14 are then wrapped in the 5th procedure of processing V, with while being elongated that it is thick
Degree is reduced to the value of 0.150mm-0.200mm, is usually reduced to about 185 microns.After being wrapped, ring 14 is commonly known as
Becket 32.Becket 32 be then subjected to it is another, i.e. ring annealing procedure of processing VI, with by much higher than 600 degrees Celsius (such as
About 800 degrees Celsius) at a temperature of ring material is carried out restoring annealing and recrystallization eliminates previous coiling process the (the i.e. the 5th
Step V) work-hardening effect.Hereafter, in the 7th procedure of processing VII, becket 32 is calibrated, i.e., they are around two
Rotating roller installation is simultaneously stretched to predetermined circle length and forcing the roller to separate.It is interior in the 7th procedure of processing VII
Stress distribution is also applied on becket 32.
Hereafter, becket 32 two procedure of processings (i.e. the precipitation-hardening or ageing treatment of the 8th procedure of processing VIII and
The gas soft nitriding of 9th procedure of processing IX) in be heat-treated.In particular, both heat treatments are directed to exist becket 32
Heated in industrial furnace or smelting furnace comprising controlled gas atmosphere, the gas atmosphere for ageing treatment and
Speech generally includes nitrogen and some (such as percentage by volume is about 5%) hydrogen, and for gas soft nitriding usually
Including nitrogen, hydrogen and ammonia.According to the basic material (i.e. the alloying component of martensite steel) of becket 32 and it is directed to metal
The desired mechanical characteristic of ring 32, both heat treatment all usually within the temperature range of 400 degrees Celsius to 500 degrees Celsius into
Row, and may last about 45 minutes respectively to more than 120 minutes.
Finally, multiple beckets 32 so processed radially stack (i.e. nested) to form ring group 31, such as further
In Fig. 3 shown in (i.e. the 11st) the procedure of processing XI finally drawn.Obviously, the becket 32 of ring group 31 must be suitable
Ground selects size, such as must be slightly different on circumferential length so that becket 32 can be one another around adaptation.For this institute
The becket 32 of obtained ring group 31 usually purposefully in (i.e. the tenth) procedure of processing X before from many circumferential lengths not
It is selected in same but known becket 32.
As general remark it should be noted that above-described entirety 3 manufacturing method of transmission belt is only used as example.Its is a variety of times
Improvement want and even main is known.For example, being held the heat treatment of timeliness and nitridation as individual procedure of processing
Row be it is known, i.e., it is known for being performed simultaneously above-mentioned 8th and the 9th procedure of processing VIII, IX.The latter combination when
Effect and nitridation heat treatment are only considered feasible in a case where: completing the ageing treatment of ring material (to desired degree)
The required time is relatively short, especially completes ageing treatment and is completing the nitridation (to desired degree) of ring (surface) material
In the case that the required time is approximately uniform.
Fig. 4 provides the schematic cross sectional views of becket 32 (showing its nitration case 34 and core 35).According to the prior art,
Becket 32 is made for nitration case 34, and the thickness Tnsl of the nitration case 34 is the overall thickness in the radial direction of becket 32
About the 18% of Tr.
In the ideal chart of Fig. 5, the hardness H (measuring according to webster hardness) of ring material is depicted about from metal
The relationship of the distance D (i.e. depth D) of the outer surface of ring 32, the depth D are expressed as the percentage of total ring thickness Tr in this example
Than.Show that the hardness H in nitration case 34 of ring material is gradually lowered in Fig. 5, and this hardness H base in ring core portion 35
This is constant, to define the thickness Tnsl of nitration case 34 relative to " inflection point " K in depth D curve in hardness H.In fact,
In this hardness H relative to will usually generate the transition that more gradually changes in depth D curve, the thickness of nitration case 34 in this case
Degree Tnsl is confirmed as: for linear extrapolation and ring of the hardness H relative to depth D contour line of the radially outer point of nitration case 34
The intersection point of (average) the hardness H of core 35.
It is instructed according to tradition and is directed to above-mentioned transmission belt 3, the thickness Tnsl of nitration case 34 should be the overall thickness of becket 32
The 10%-20% of Tr, the range are not applied exceptionally in practice really.However, according to the disclosure and coupling collar core 35
The relatively low hardness less than 550HV1.0 of the material at place, can application range value be total ring thickness Tr 22%-28%
Thicker nitration case 34.Fig. 6 is provided by the hardness H of the transmission belt metal ring element 32 limited with this relative to depth D curve
One example of the transmission belt metal ring element 32.In the example embodiment of the becket 32 indicated by Fig. 6, nitration case
34 thickness Tnsl is the 23% of the overall thickness Tr of becket 32, and the hardness of ring core material is 490HV1.0.
By making relatively thick nitration case 34 can be formed in the outer surface of becket 32, the 9th procedure of processing
The duration of the gas soft nitriding of IX is extended.This extended nitridation duration be obviously in itself it is undesirable,
However, in the case where being presently considered, the precipitation-hardening of the 8th procedure of processing VIII can be at the same time in range
It completes, therefore harden and nitrogenize both heat treatments valuably while to be applied to individually, in the procedure of processing that combines
Becket 32.
In addition, it has been determined that nitration case 34 be presently considered, relatively thick is combining hardness less than 550HV1.0
Relatively soft ring core portion 35 in the case where effect it is especially good.And this ring core hardness H should be higher than that anyway
400HV1.0, to provide the sufficient mechanical strength for applying in transmission belt 3 to becket 32.Finally, according to this public affairs
It opens, hardness H is located in region " ca " marked in Fig. 6 relative to the inflection point K in depth D curve.
In the introduction of the disclosure, the martensite steel ingredient of wide scope can be in the precipitation-hardening and nitridation of this combination
Be heat-treated in individual procedure of processing, be in particular be previously considered it is improper for should be used to say that in transmission belt 3
Or at least less suitable this ingredient.More specifically, the martensite base steel in the introduction of the disclosure, for becket 32
It includes the relatively large amount of cobalt applied at present that this material, which does not need, or other sediments are formed or catalytic elements.
Other than all detailed contents of the full content of aforementioned specification and attached drawing, present disclosure also relates to include power
All features that benefit requires.Parenthesized appended drawing reference does not limit its scope in claim, but only as individual features
Non-binding example.The feature of claim can apply individually to specified product or specified mistake as the case may be
Journey, but can also wherein apply two or more combinations in this feature.
The present invention is not limited to the embodiment clearly proposed herein and/or examples as representated by the disclosure, but also wrap
Include its modification, improve and practical application, especially include those skilled in the art's range in power in those of modification, improve and
Practical application.
Claims (4)
1. a kind of transmission belt of stepless transmission (3), there are two belt wheel and transmission belt (3), the biographies for the stepless transmission tool
Dynamic band is provided with becket (32), and the becket (32) is made of martensite steel, and the ingredient of the martensite steel includes: quality
Cobalt that molybdenum that nickel that percentage is 17%-19%, mass percent are 4%-6%, mass percent are 4%-6%, quality hundred
Point than be 0.5%-1.5% chromium, mass percent be 0.5%-1.5% the titanium of aluminium and mass percent less than 0.1% and
Remaining is iron, the core that the becket (32) is provided with nitrided surface layer (34) and is located in the nitrided surface layer (34)
(35), which is characterized in that the range of the thickness (Tnsl) for the nitrided surface layer (34) that the becket (32) has is the gold
Belong to the 24%-28% of the overall thickness size (Tr) of ring (32), the becket (32) is wrapped up by the nitrided surface layer (34)
The hardness of core (35) be at least 400HV1.0 at most 500HV1.0.
2. transmission belt (3) according to claim 1, which is characterized in that the thickness (Tnsl) of the nitrided surface layer (34)
It is the 25% of the overall thickness size (Tr) of the becket (32).
3. transmission belt (3) according to claim 1 or 2, which is characterized in that the overall thickness size (Tr) is 0.15mm-
0.20mm。
4. method of the one kind for manufacturing becket (32), the becket (32) are intended as the transmission belt of stepless transmission
(3) or at least in the transmission belt (3) of stepless transmission, there are two belt wheel and transmission belt (3), institutes for the stepless transmission tool
Becket (32) is stated to be made of martensite steel, the ingredient of the martensite steel include: mass percent be 17%-19% nickel,
Chromium that cobalt that molybdenum that mass percent is 4%-6%, mass percent are 4%-6%, mass percent are 0.5%-1.5%,
Mass percent be 0.5%-1.5% the titanium of aluminium and mass percent less than 0.1% and remaining be iron, which is characterized in that
In the procedure of processing of gas soft nitriding, the becket (32) is provided with nitrided surface layer (34) and sediment, the nitridation
Superficial layer (34) is the 24%-28% of the overall thickness size (Tr) of the becket (32), thus the quilt of the becket (32)
The hardness of the core (35) of nitrided surface layer (34) package is at least 400HV1.0 at most 500HV1.0.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLNL-1040571 | 2013-12-24 | ||
| NL1040571A NL1040571C2 (en) | 2013-12-24 | 2013-12-24 | Metal ring component for a drive belt for a continuously variable transmission. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104728344A CN104728344A (en) | 2015-06-24 |
| CN104728344B true CN104728344B (en) | 2019-02-15 |
Family
ID=50190630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410814767.8A Active CN104728344B (en) | 2013-12-24 | 2014-12-23 | The transmission belt of stepless transmission and its manufacturing method of becket |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2015145724A (en) |
| CN (1) | CN104728344B (en) |
| NL (1) | NL1040571C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| NL1041998B1 (en) * | 2016-07-27 | 2018-02-01 | Bosch Gmbh Robert | Flexible steel ring made from maraging steel and provided with a nitrided surface layer |
| WO2019120627A1 (en) * | 2017-12-22 | 2019-06-27 | Robert Bosch Gmbh | Metal ring component of a drive belt for a continuously variable transmission and its manufacturing method |
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| EP1111080A2 (en) * | 1999-12-24 | 2001-06-27 | Hitachi Metal, Ltd. | Maraging steel having high fatigue strength and maraging steel strip made of same |
| CN101061329A (en) * | 2004-11-17 | 2007-10-24 | 罗伯特·博世有限公司 | Push belt and making method therefor |
| CN102016348A (en) * | 2008-04-28 | 2011-04-13 | 罗伯特·博世有限公司 | Drive belt ring component and manufacturing method and maraging steel base material therefor |
| CN102549301A (en) * | 2009-10-06 | 2012-07-04 | 罗伯特·博世有限公司 | Drive belt provided with a laminated set of steel rings |
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| EP1176224B1 (en) * | 2000-07-24 | 2014-04-16 | Dowa Thermotech Co., Ltd. | Nitrided maraging steel and method of manufacturing thereof |
| FR2823766B1 (en) * | 2001-04-18 | 2004-04-02 | Imphy Ugine Precision | RING CONSISTING OF A MARACING STEEL TAPE FOR MANUFACTURING A BELT FOR A CONTINUOUSLY VARIABLE TRANSMISSION DEVICE |
| EP1753889B1 (en) * | 2004-05-19 | 2017-04-12 | Robert Bosch Gmbh | Push belt and manufacturing method therefor |
| JP5174963B2 (en) * | 2008-06-30 | 2013-04-03 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Heat treatment process for metal ring components of drive belt |
| JP4451919B1 (en) * | 2009-07-27 | 2010-04-14 | エア・ウォーター株式会社 | Steel sheet and manufacturing method thereof, and steel belt for continuously variable transmission |
| CN103703274B (en) * | 2011-06-30 | 2016-10-26 | 罗伯特·博世有限公司 | Flexible ring and manufacture method thereof for buncher transmission band |
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2013
- 2013-12-24 NL NL1040571A patent/NL1040571C2/en active
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- 2014-12-23 CN CN201410814767.8A patent/CN104728344B/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1111080A2 (en) * | 1999-12-24 | 2001-06-27 | Hitachi Metal, Ltd. | Maraging steel having high fatigue strength and maraging steel strip made of same |
| CN101061329A (en) * | 2004-11-17 | 2007-10-24 | 罗伯特·博世有限公司 | Push belt and making method therefor |
| CN102016348A (en) * | 2008-04-28 | 2011-04-13 | 罗伯特·博世有限公司 | Drive belt ring component and manufacturing method and maraging steel base material therefor |
| CN102549301A (en) * | 2009-10-06 | 2012-07-04 | 罗伯特·博世有限公司 | Drive belt provided with a laminated set of steel rings |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1040571C2 (en) | 2015-06-26 |
| CN104728344A (en) | 2015-06-24 |
| JP2015145724A (en) | 2015-08-13 |
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