CN104203458B - By using vibration that sintered body is carried out case-hardened method - Google Patents
By using vibration that sintered body is carried out case-hardened method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 104
- 239000000758 substrate Substances 0.000 claims abstract description 96
- 230000001133 acceleration Effects 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 238000005065 mining Methods 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 9
- 210000000746 body region Anatomy 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 6
- 239000010941 cobalt Substances 0.000 abstract description 2
- 229910017052 cobalt Inorganic materials 0.000 abstract description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052759 nickel Inorganic materials 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 25
- 239000000463 material Substances 0.000 description 11
- 238000012545 processing Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 239000010936 titanium Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000007545 Vickers hardness test Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Abstract
The present invention relates to a kind of multiple sintered bodies to comprising hard phase such as WC and Binder Phase such as cobalt or nickel and carry out case-hardened method.Described method comprises the steps: to place in a reservoir described base substrate, is consequently formed and comprises described container and the system of described base substrate therein, and described base substrate is moved and mutually and collides with the inwall of described container.Described container utilizes the mechanical resonance frequency of described system to vibrate, that described vibration is preferably single shaft and sound wave, its frequency with 20～80Hz and the acceleration of 30～100G.
Description
Technical field
The present invention relates to a kind of the multiple sintered bodies comprising hard phase and Binder Phase (sintered body) be carried out surface
The method of hardening, wherein said method comprises the steps: put in container by described base substrate (body) and be consequently formed by institute
State container and the system of described base substrate therein restriction so that described base substrate moves and mutual and with described container inwall occurs
Collision.
Background technology
The assembly being made up of the sintered material comprising hard phase and Binder Phase is used in the application of wide scope, such as, is used for
Under abrasive conditions in the assembly of the extreme abrasion of experience.In oil, gas and mining industry, it is several significant components, from drill bit
Commonly used material in household wear parts.The most important material character of this assembly is high surface hardness and high tenacity
Combination.Preferably, outer surface display high rigidity is to resist abrasive wear, and the core display high tenacity of base substrate is with the damage that withstands shocks
Wound.
Hard alloy is the example of this material comprising tungsten carbide particle in the Binder Phase of usual cobalt and/or nickel.Institute
State manufacture and generally include following steps: the powder of WC and Co is carried out mixing wet grinding form slurry, described slurry is sprayed
It is dried, and the base substrate of the powder of described spray drying is pressed into desired shape.It is sintered the base substrate of compacting being formed
The DB of hard alloy.Described sintered body can grind due to dimensional tolerance (dimension tolerance) or machinery
It is processed into its final size.
The surface of the cemented carbide body of sintering can carry out processing to improve the wearability of base substrate by surface hardening.Often
Rule ground, applies this surface to process by such as vibrating tumbling (tumbling), centrifugal tumbling or shot peening.Surface processes
Another example of method is the cascade flow disclosed in US 2005/0053511 and US 2010/0075122
(cascading)。
Surface hardening treatment known to these is the mechanical shock with base substrate outer surface or is deformed into basis, thus at table
Locate immediately below at face and on surface to form strain hardening or processing hardening region.During deforming, dislocation moves also in the material
Form new dislocation, and dislocation mutually locks, thus achieve the increase of hardness.
Summary of the invention
It is an object of the invention to provide a kind of sintered body to comprising hard phase and Binder Phase and carry out case-hardened method,
Described method has higher time and energy efficiency than prior art.Another purpose is to provide a kind of case hardening process,
Described method provides the region, surface than prior art with more high rigidity level.Still another object is to provide a kind of surface hard
Change method, compared with prior art, the described method bigger depth below billet surface provides hardness to increase.Further
Purpose is to provide the toughness bigger than prior art.
By the multiple sintered bodies comprising hard phase and Binder Phase being carried out case-hardened method and by through described side
The base substrate comprising hard phase and Binder Phase that method processes realizes these purposes, and wherein said method comprises the steps: base substrate
Place in a reservoir, be consequently formed and comprise described container and the system of described base substrate therein；By utilizing the machine of described system
Tool resonant frequency makes described container vibration, and described base substrate is moved and mutually and collides with the inwall of described container.
The present invention relates to a kind of multiple sintered bodies to comprising hard phase and Binder Phase and carry out case-hardened method.Described
Method comprises the steps: to place in a reservoir base substrate, is consequently formed and comprises described container and the body of described base substrate therein
System, by utilizing the mechanical resonance frequency of described system to make described container vibration, described base substrate is moved and mutually and with
The inwall of described container collides.
One advantage of the method according to the invention is that the process time required for realizing Surface hardened layer effect is short.Another
Advantage is, compared with in itself previously known method, described method causes bigger hardness increase and the hardness at bigger depth
Increase.And, utilize the resonant frequency of described system to provide the advantage that energy consumption is low.
The base substrate of the present invention can have any shape, the such as shape of drill tip (insert).
Described container is arranged in the way of encapsulating pending base substrate.Described container comprises wall and preferred closable opening,
Can load by base substrate described in described opening before treatment and unload after the treatment.Described container can have and such as have
The bottom closed and the cylindrical shape at closable top.Closable top is opened during base substrate is loaded into container,
And close during case hardening process.Described container within it can be provided with liner on wall, and described liner is by such as making
Collision between base substrate and chamber wall is more biased towards the material of elastic collision and makes.Liner can be such as by polymeric material or other conjunction
Suitable material such as steel are made.
The system limited by container and base substrate therein can comprise the base substrate of difformity or size, and it can be additionally included in
The medium such as gas or liquid of base substrate is surrounded during process.
Described base substrate can be arranged in the way of can move freely during processing to allow it.Or, can during processing
Some base substrates are fixed to wall of a container and some base substrates move freely, it is possible to only in the region selected to fixing base
Body processes.
During single treatment, in container, the suitable number of base substrate is adjusted by those of ordinary skill in the art.With more skinny device
In small container compare, the bulk container in bigger equipment can have higher base substrate number certainly.Described equipment preferably for
The mode of specific load designs and preferred non-overloading.Free volume in container needs sufficiently large to think that base substrate provides space, with
Preacceleration in collision.If there is base substrate very little during processing in a reservoir, then relatively low due to collision frequency and process
Amount (throughput) is relatively low and causes the time efficiency processed relatively low.If the base substrate in container is too many, then owing to accelerating road
The average length in footpath is short and causes the inefficient of technique.If only making each base substrate accelerate the shortest distance, the most every time
The energy of collision is relatively low.The biggest base substrate needs the biggest container.Preferably so that workload is optimal relative to system capacity.
Mechanical resonance, also referred to as natural vibration or self-oscillation, be that the amplitude wherein vibrated substantially amplifies under resonant frequency
The universal phenomenon of vibration system.Under resonant frequency, even if weak driving force is applied to system, it still is able to provide big shaking
Width, therefore provides the system of high acceleration.The level amplified depends on frequency and when frequency is close or equal to non-continuous (un-
Reach maximum during the natural frequency of sustained) system.But, generally avoid mechanical resonance, because under resonance, many energy
Amount transfers to vibration system because of driving force, and damage or operation disturbance thus generally occur.
In the method according to the invention, on the other hand, utilize mechanical resonance that system is placed in energy to shake the most efficiently
Dynamic model formula.Described system is forced to be vibrated under the frequency equal or close to its resonant frequency.It is advantageous that, the base substrate in container
Affected by vibrations, thus it is moved and mutually collides under conditions of high-energy and high acceleration.Term " utilizes body
The mechanical resonance frequency of system " refer to, system is vibrated under the frequency close to the mechanical resonance frequency of system.Close to resonant frequency
Frequency refers in +/-0.05Hz.
In order to this is emphasized, preferably connect the container at least one spring and at least one control member.It is excellent
Gesture is, it is possible to by vibration and the system isolation limited by container, the most described method can keep relative stability and controlled.Institute
State container and the sensor reaching resonant frequency for continuous measurement acceleration control is preferably installed.A reality in the present invention
Execute in scheme, by frequency being raised and lowered continuously and measuring acceleration and find resonant frequency, it is thus found that for vibration system
Mechanical resonance frequency.In another embodiment of the present invention, such as based on experiment before with load in a reservoir
The gross weight of base substrate, predetermined resonant frequency.
The case hardening process according to the present invention can be implemented in resonant acoustic wave mixer apparatus.Sonic mixers is at this
It is known in field, for example, see WO 2008/088321 and US 7,188,993.This blender uses low frequency, high intensity
Acoustic energy is to mix.
Described sintered body can be such as made up of ceramic metal or hard alloy.Such as, TiCN based ceramic metal can comprise 3～
The main Binder Phase being made up of Co and/or Ni of 30 weight %, also can comprise Mo, and surplus is essentially hard phase with inevitable
Impurity.In TiCN based ceramic metal, hard phase is mainly made up of the carbide of titanium, nitride and/or carbonitride, but also may be used
To comprise (Ti, Ta) (C, N), (Ti, W) (C, N), (Ti, Ta) (C, N) and/or (Ti, Ta, W) (C, N).
In one embodiment of the invention, described sintered body is made up of hard alloy.Described Hardmetal materials can
Such as comprise Binder Phase and the hard phase of remaining WC particle of Co and/or Ni of 3～20 weight %.The granularity of WC particle can be
Any size.In one embodiment, the particle mean size of WC is preferably 1～8 μm, and described granularity is to use division lines method
(linear intercept method) measures.In one embodiment, the particle mean size of WC is preferably shorter than 1 μm, described
Granularity is to use division lines method to measure.Described hard alloy also can comprise selected from following hard constituents: periodic chart 4 race, 5 races or
Boride, carbide, nitride or the carbonitride of 6 race's metals, described metal is preferably tungsten, titanium, tantalum, niobium, chromium and vanadium.Hard
The granularity of composition can have less than 1 μm up to the average-size of 8 μm, and it depends on classes of applications (grade
application)。
In one embodiment of the invention, described container vibrates under conditions of single shaft vibrates.
In one embodiment of the invention, the movement of described base substrate is derived from single shaft vibration.This rolls with conventional rotation
Rubbing up cascade flow different, wherein in conventional technique, base substrate realizes its motion from radial motion.
In one embodiment of the invention, described vibration is acoustic vibration.Sound wave is utilized described system to be placed in altogether
Under the conditions of shaking.Think that frequency of sound wave is in interval 20～20000Hz.In another embodiment of the present invention, described vibration
Have 20～80Hz, preferably 50～the frequency of 70Hz.
In one embodiment of the invention, described container has 10～100G, preferably 30～50G, most preferably 40G
Acceleration vibration under vibrate, wherein 1G=9.81m/s2.The acceleration applied affects base substrate and sets the intensity of collision.Too
High acceleration has negative effect because the danger of surface damage and face crack and abrasion is higher to base substrate.About under surface
The degree of depth and the processing firmness level that reaches of hardening, too low acceleration will cause the inefficient of case hardening process.Setting
Being scheduled under the acceleration of relatively low value, the method according to the invention will realize the table similar with the such as tumbling of standard hardening method
Face hardening result.Alternatively, can be set in by acceleration under higher value, the method thus according to the present invention is capable of and table
The Surface hardened layer result that face method for curing is similar, but the time much less spent.
System and internally-damped, such as by container is depended in order to apply the amount of energy required for realizing sufficient effect
Inelastic collision and the loss that causes, and any out-damping, be such as connected to spring or the damping element of external container
The loss of middle generation.
In one embodiment of the invention, the volume of each base substrate is more than 100mm3.Another reality in the present invention
Executing in scheme, the weight of each base substrate is more than 0.01kg.The value of quality and volume is the lowest, then the acceleration causing base substrate is not enough,
Thus processing hardening will be the most notable.
In one embodiment of the invention, described method is for oil, gas or the table of mining application cemented carbide body
Harden in face.
In one embodiment of the invention, described base substrate is drill tip.Drill bit is generally used for rock or other is non-
Creeping into of the hardest and crisp material.
The invention still further relates to the sintered body comprising hard phase and Binder Phase processed by method disclosed above.
In one embodiment of the invention, the hardness in described sintered body display first surface region, described hardness ratio
The hardness height ＞ 4% of body regions, wherein in described first surface region, described first surface region is from the table of described base substrate
Under face and described surface, 1mm extends into described base substrate, and described body regions 5mm from surface extends into described base substrate.It is excellent
Gesture is the wearability improved.
In one embodiment of the invention, the hardness in described sintered body display second surface region, described hardness ratio
The hardness height ＞ 1.5% of body regions, wherein in described second surface region, described second surface region is from described base substrate
Under surface and described surface, 5mm extends into described base substrate, and described body regions extends into described base substrate.Its advantage is improve
Wearability.
When combining drawings and claims and considering, according to following detailed Description Of The Invention, other mesh of the present invention will be made
, advantage and new feature become obvious.
Accompanying drawing explanation
Now with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the figure of drill tip,
Fig. 2 is the figure of the hardness of the function as the degree of depth according to embodiment 5.
Detailed description of the invention
Hereinafter, embodiment 1 discloses the sample before any Surface hardening treatment, examples 2 describes basis
One example of the method for one embodiment of the invention, and embodiment 3 and 4 describes tumbling known in the art and high energy
Tumbling processes.Embodiment 5 discloses the hardness test processing the sample processed according to the present invention compared with prior art
As a result, described hardness is the function of the degree of depth, and embodiment 6 discloses tough test result.Embodiment 7 discloses according to this
The crushing test (crush test) that the sample of daylight reason is implemented, is carried out described sample with the sample processed according to prior art
Compare.Embodiment 8 discloses the change of the coercivity (Coersivity) caused by treatment in accordance with the present invention.
Embodiment 1 (prior art)
Manufacture the hard alloy sample comprising hard phase WC and Binder Phase Co.The powder of WC and Co is carried out wet grinding, spray
Mist is dried and pressed into the base substrate of drill-shape.At a temperature of 1410 DEG C, the base substrate GPS of compacting is sintered into firmly under vacuo
The fine and close sample of matter alloy.Various base substrates are the form of drill bit 1 as shown in Figure 1, and wherein green body cylinders has a ball
Shape end 2 and a flush end 3.The size of one base substrate is, height is 12mm for 15mm and diameter or width.The weight of one sample
It is about 25g.UseSample is entered by type centerless grinding equipment (centre less grinding equipment)
Go centreless grinding.
Sample is characterized and composition and character are shown in Table 1.
The mean intercept method according to ISO 4499 is utilized at otch (through cut) place of polishing, granularity to be surveyed
Measure, and the value shown in table 1 is meansigma methods.
The load using 30kg utilizes Vickers (Vickers) durometer to hardness according to ISO 3878 in the surface of polishing
Measured.
Being measured porosity according to ISO 4505, ISO 4505 is a kind of light based on the polished cut at sample
Learn the method carrying out in microscope studying.Using ISO 4505 scale, the porosity of good level is maximum equal to or less than A02
B00C00(A02maxB00C00)。
The composition of 1. test samples of table and character
| Type | A | B | C |
| Co (weight %) | 11 | 10 | 6 |
| WC | Surplus | Surplus | Surplus |
| Wc grain size (μm) | 2 | 3 | 3 |
| Hardness (HV30) | 1250 | 1150 | 1270 |
| Porosity | A02maxB00C00 | A02maxB00C00 | A02maxB00C00 |
Embodiment 2 (present invention)
By method according to an embodiment of the invention, the sample of type A, B and C is processed.It is being referred to as
Sample is processed in the equipment mixing liquid, powder or slurry by Resodyn LabRam.To load most 500g
Mode construct this machinery.Container for powder or liquid is mounted with 10 base substrates, each 25g.Use " automatically " (Auto)
Function, to reach resonant frequency in the interval of 58～68Hz, stops (landing) in the frequency of about 60Hz.The process time is such as
Disclosed below and change.In the way of realizing peak acceleration 20G, 40G or 60G, energy is adjusted, wherein 1G=
9.82m/s2。
Embodiment 3 (tumbling)
In standard vibration tumbling machinery, the sample of type A is carried out tumbling.Tumbling machinery is arranged on vibration for comprising
The vibrating machine of the bowl (bowl) on raw device top.Tumbling machinery is Sweco type X FMD-3-LR, and it can load at most
70kg.The number of the base substrate processed in this embodiment is about 2000 base substrates.Frequency is 25kg, and acceleration is 2G, and tumbling
Time be 2 hours.
Embodiment 4 (high energy tumbling)
The sample of type A is processed by Vibro Benz type high energy tumbling machinery.It is the tumbling machinery improved,
Wherein sample vibrated and move in the way of screw.The method is also referred to as cascade flow.Described machinery can load
At most 70kg.The number of the base substrate processed during this embodiment is about 2000 base substrates.Frequency is 26kg, and acceleration is 4G,
And the time of high energy tumbling is 2 hours.
High energy tumbling relates to being put into by parts in bucket (barrel).Then, at the carousel accommodating four buckets
(carousel) on, the bucket sealed with lid is rotated.While carousel rotates in one way, bucket is at it
Its side moves upward.This produces the centrifugal force of strength, thus parts are carried out surface process.
Embodiment 5 (hardness and the degree of depth)
Case hardening process according to the present invention is compared with known case hardening process tumbling, and about firmly
The degree of depth that the increase of degree and hardness increase compares with untreated sample.
Utilize tumbling disclosed above and under 40G, the sample of type A being processed according to the present invention, and with not
The sample processed compares.By sample otch and polish, Vickers hardness test is utilized under 3kg load, hardness to be carried out
Measuring, described hardness is as the function of the degree of depth away from treated surface.Show the result in table 2 and shown in Figure 2.
Table 2. is as the hardness (HV3) of the function processed with the degree of depth
As shown in table 2, the sample utilizing Surface hardened layer according to an embodiment of the invention to carry out processing shows
The degree of depth that higher levels of hardness and bigger hardness increase.It should be noted that compared with 1 hour according to the inventive method, be used for
The process time that tumbling processes is 2 hours.
Embodiment 6 (toughness)
The tumbling of the case hardening process according to the present invention with known case hardening process is compared, and about
The increase of toughness compares with untreated samples.Specimen types A is carried out Surface hardening treatment and has measured toughness.Base
Toughness is studied by the crack length in the corner at the Vickers indentation (indent) made by 100kg load, described
Crack length the most so-called " average Palmquist (Palmquist) crack length ", and show the result in table 3.
In region, surface, under the optical microscope of 500 times, it is not detected by crackle, and in nucleus, at 500 times
Under, in the material processed without ephemeris face, crack length is usually 77 μm.
Table 3.Palmquist crack length (μm)
Embodiment 7 (crushing test)
By sample being placed between two anvils and applying the load of increase continuously until rupturing, implement so-called
" crushing test ".Then the load when destroying being recorded as maximum compressive strength, described maximum compressive strength is that sample is broken
The comprcssive strength that can bear before Huai.The sample with type A of geometry as disclosed above has been carried out described test,
And result is shown in Table 4 as comprcssive strength.
The table 4. load when fracture
| Surface processes | Comprcssive strength (kN) |
| Untreated surface, grinding | 83.32 |
| Tumbling (prior art) | 115.38 |
| High energy tumbling (prior art) | 124.26 |
| 40G of the present invention, 75 minutes | 134.72 |
| 60G of the present invention, 75 minutes | 141.55 |
Embodiment 8 (coercivity)
Hard alloy reference sample is used to utilize the Foerster equipment of suitably calibration that coercivity (Hc) is measured.
Coercivity raises because the surface according to the present invention processes, as shown in table 5.
The untreated base substrate of table 5. and the coercivity (kA/m) of the base substrate according to present invention process
| Type | A | B | C |
| Untreated | 8.2 | 6.0 | 6.8 |
| 40G of the present invention, 75 minutes | 9.2 | 7.0 | 7.6 |
As shown in table 6, coercivity level raises with the acceleration during process time and process.
Table 6. for type A sample as the coercivity (kA/m) of the function processing time and acceleration
Compared with the hardness measurement needing otch, the advantage carrying out coercivity measurement is to need not any destruction
Under conditions of step, base substrate is implemented coercivity measurement.Quantification steps during it is possible to as such as production line implements coercive
Power is measured with inspection Surface hardening treatment the most abundant.
Although already in connection with multiple exemplary, invention has been described, it should be appreciated that the present invention is not subject to
It is limited to disclosed exemplary, on the contrary, it is intended to cover the various variants in scope and equivalence
Arrange.
Claims (41)
1. the multiple sintered bodies to comprising hard phase and Binder Phase carry out case-hardened method, it is characterised in that described
Method comprises the steps:
Base substrate is placed in a reservoir, is consequently formed and comprises described container and the system of described base substrate therein,
By utilizing the mechanical resonance frequency of described system to make described container vibration, and described base substrate is moved and mutually and with
The inwall of described container collides.
Method the most according to claim 1, wherein said hard phase is WC, and described Binder Phase is Co and/or Ni.
Method the most according to claim 1 and 2, wherein said container vibrates under single shaft vibration condition.
Method the most according to claim 3, the movement of wherein said base substrate is derived from described vibration.
Method the most according to claim 1 and 2, wherein said vibration is acoustic vibration.
Method the most according to claim 3, wherein said vibration is acoustic vibration.
Method the most according to claim 4, wherein said vibration is acoustic vibration.
Method the most according to claim 1 and 2, wherein said container vibrates under the vibration with 20～80Hz frequencies.
Method the most according to claim 3, wherein said container vibrates under the vibration with 20～80Hz frequencies.
Method the most according to claim 4, wherein said container vibrates under the vibration with 20～80Hz frequencies.
11. methods according to claim 5, wherein said container vibrates under the vibration with 20～80Hz frequencies.
12. methods according to claim 1 and 2, wherein said container shakes under the vibration with 30～100G acceleration
Dynamic, wherein 1G=9.81m/s2。
13. methods according to claim 3, wherein said container vibrates under the vibration with 30～100G acceleration,
Wherein 1G=9.81m/s2。
14. methods according to claim 4, wherein said container vibrates under the vibration with 30～100G acceleration,
Wherein 1G=9.81m/s2。
15. methods according to claim 5, wherein said container vibrates under the vibration with 30～100G acceleration,
Wherein 1G=9.81m/s2。
16. methods according to claim 6, wherein said container vibrates under the vibration with 30～100G acceleration,
Wherein 1G=9.81m/s2。
17. methods according to claim 1 and 2, the volume of one of them base substrate is more than 100mm3。
18. methods according to claim 3, the volume of one of them base substrate is more than 100mm3。
19. methods according to claim 4, the volume of one of them base substrate is more than 100mm3。
20. methods according to claim 5, the volume of one of them base substrate is more than 100mm3。
21. methods according to claim 6, the volume of one of them base substrate is more than 100mm3。
22. methods according to claim 7, the volume of one of them base substrate is more than 100mm3。
23. methods according to claim 1 and 2, the weight of one of them base substrate is more than 0.01kg.
24. methods according to claim 3, the weight of one of them base substrate is more than 0.01kg.
25. methods according to claim 4, the weight of one of them base substrate is more than 0.01kg.
26. methods according to claim 5, the weight of one of them base substrate is more than 0.01kg.
27. methods according to claim 6, the weight of one of them base substrate is more than 0.01kg.
28. methods according to claim 7, the weight of one of them base substrate is more than 0.01kg.
29. methods according to claim 8, the weight of one of them base substrate is more than 0.01kg.
30. methods according to claim 1 and 2, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Matter alloy body.
31. methods according to claim 3, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
32. methods according to claim 4, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
33. methods according to claim 5, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
34. methods according to claim 6, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
35. methods according to claim 7, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
36. methods according to claim 8, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
37. methods according to claim 9, wherein said base substrate is the hard of the sintering for oil, gas or mining application
Alloy body.
38. methods according to claim 30, wherein said base substrate is drill tip (1).
39. 1 kinds of sintered bodies processed by the method described in any one in claims 1 to 38, described sintered body comprises firmly
Matter phase and Binder Phase.
40. according to the sintered body described in claim 39, the wherein hardness height ＞ of the hardness ratio body regions in first surface region
4%, wherein in described first surface region, described first surface region is 1mm from the surface of described base substrate and described surface
Extend into described base substrate, and described body regions 5mm from described surface extends into described base substrate.
41. according to the sintered body described in claim 39 or 40, the wherein hardness of the hardness ratio body regions in second surface region
High ＞ 1.5%, wherein in described second surface region, described second surface region is from the surface of described base substrate and described surface
Lower 5mm extends into described base substrate, and described body regions extends into described base substrate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12159307.3A EP2638992B1 (en) | 2012-03-13 | 2012-03-13 | Method of surface hardening |
| EP12159307.3 | 2012-03-13 | ||
| PCT/EP2013/054607 WO2013135555A1 (en) | 2012-03-13 | 2013-03-07 | Method of surface hardening sintered bodies by using vibrations |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104203458A CN104203458A (en) | 2014-12-10 |
| CN104203458B true CN104203458B (en) | 2016-11-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002079452A (en) * | 2000-06-23 | 2002-03-19 | Sumitomo Special Metals Co Ltd | Chamfering method for rare earth alloy, and selecting method and device for ball media |
| EP1287928B1 (en) * | 2001-09-03 | 2009-10-14 | Kabushiki Kaisha Toyota Jidoshokki | Process for producing composite material |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002079452A (en) * | 2000-06-23 | 2002-03-19 | Sumitomo Special Metals Co Ltd | Chamfering method for rare earth alloy, and selecting method and device for ball media |
| EP1287928B1 (en) * | 2001-09-03 | 2009-10-14 | Kabushiki Kaisha Toyota Jidoshokki | Process for producing composite material |
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