CN108130483B - A kind of guider of shock absorber and preparation method thereof - Google Patents
A kind of guider of shock absorber and preparation method thereof Download PDFInfo
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- CN108130483B CN108130483B CN201711417657.8A CN201711417657A CN108130483B CN 108130483 B CN108130483 B CN 108130483B CN 201711417657 A CN201711417657 A CN 201711417657A CN 108130483 B CN108130483 B CN 108130483B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1035—Liquid phase sintering
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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Abstract
The present invention relates to automobile technical fields more particularly to a kind of guider of shock absorber and preparation method thereof.The raw material of the guider of shock absorber includes the component of following parts by weight: Fe powder: 60-80 parts；Nickel powder: 10-20 parts；Silica: 2-6 parts；Antimony powder: 0.8-2.1 parts；Phosphorus powder: 0.5-1.2 parts；Rare earth oxide: 0.8-1.5 parts；Lubricant: 0.5-1.0 parts.The preparation method comprises the following steps: weighing the raw material according to the ratio and carries out ball milling, after spray drying, it is dry-pressing formed, shaped article is warming up to 450-550 DEG C, heat preservation ultrasonic treatment 20-30min, it is pressed again after cooling, is subsequently placed in vacuum drying oven and is warming up to 1500-1700 DEG C with 1-1.5 DEG C/s, heat preservation sintering 1-2h.
Description
Technical field
The present invention relates to automobile technical fields more particularly to a kind of guider of shock absorber and preparation method thereof.
Background technique
In recent years, the damping with the fast development of auto industry, especially car industry, as the important accessory of automobile
Device is also rapidly developed.Automobile absorber is a kind of damping element, be automobile suspension system important component it
One, the ride comfort of vehicle driving, comfort, safety, steering operation and passability are served conclusive.It is now wide
The general independent suspension type damper applied on car, 95% or more is that the bitubular is hydraulic or pneumatic bumper, since it is with matter
Small, performance stabilization is measured, reliable operation, becomes the mainstream of automobile absorber at suitable the advantages that producing in enormous quantities.The work of damper
Principle be when between vehicle frame or wheel and vehicle body it is vibrated there is relative motion when, the piston in damper moves up and down, damping
Pressure oil in device just repeatedly flows into shock absorber oil storage cylinder from a damper working cylinder by different throttle orifices, at this time hole
The intermolecular interior friction of friction and hydraulic oil between wall and hydraulic oil forms damping force to vibration, converts automobile vibrational energy
For oil liquid thermal energy, then it is dispersed into atmosphere by absorber.Guider is one of the important spare part in damper, it is to subtracting
The movement of piston rod plays good guiding role in shake device, and bears the huge lateral force generated therefrom, simultaneously
Working cylinder is connected to oil storage cylinder by the oilhole of guider.
However in actual use, since guider of shock absorber needs multiple back and forth movement, it is therefore desirable to guider
With good wear-resisting property and there are preferable product density and air tightness.In the prior art, Chinese patent (Granted publication
Number: a kind of production process of guider of front shock absorber of automobile CN 102335744B) is disclosed, through mixing, compacting sintering, finishing, hair
Blue, cleaning, packing processes obtain guider, mainly use one-shot forming technique, overcome current same type producer still need to it is subsequent
The problem of finishing, improves work efficiency；Chinese patent (Authorization Notice No.: CN 102921942B) discloses a kind of damping
Device guider and preparation method thereof, the guider are made of reduced iron powder, electrolytic copper powder, graphite, lubricant and manganese sulfide, pass through
The adjustment of material composition improves the performance of guider of shock absorber.These prior arts still cannot to the promotion of guider performance
Meet guider of shock absorber need of work, the deficiency of guider performance can shorten the service life of damper, influence damper
Working efficiency.
Summary of the invention
For disadvantages mentioned above of the existing technology, the present invention provides a kind of guider of shock absorber and preparation method thereof, leads to
The combination of component and technique is crossed, so that guider of shock absorber performance greatly promotes and meets need of work.
Above-mentioned purpose of the invention can be realized by the following technical scheme: a kind of guider of shock absorber, the damper
The raw material of guider includes the component of following parts by weight:
Fe powder: 60-80 parts；Nickel powder: 10-20 parts；Silica: 2-6 parts；Antimony powder: 0.8-2.1 parts；Phosphorus powder: 0.5-1.2
Part；Rare earth oxide: 0.8-1.5 parts；Lubricant: 0.5-1.0 parts.
Iron powder and nickel powder are the common metal elements in powder metallurgy process, using ferro element as main body, nickel element conduct
Collaboration support effect can occur for the component cooperation of ligand, the two, enhance product performance.Individual rare earth oxide is in powder smelting
Crystal grain can be refined during gold, improve densification, but this effect is not very prominent.In the present invention, it is added to antimony
The antimony phosphorus compound of powder and phosphorus powder, rare earth oxide and addition interacts during the sintering process, can be in matrix richness phosphorus and antimony
Side, generate the glass phase composite oxides of low melting point, this composite oxides first becomes liquid phase in initial stage of sintering, generated
Liquid phase is impregnated with to iron particle, since surface tension is drawn together the iron particle of surrounding, so as to cause rapidly densifying, and sintering
Later period, composite oxides are distributed in crystal boundary, grow up to crystal grain and play pinning interception, further increase crystal grain refinement degree.Two
Silica in the base evenly dispersed can induce the generation of above-mentioned composite oxides, and silica itself has enhancing
Effect.The content of antimony powder and phosphorus powder in the base must be strictly controlled, and excessive presence will lead to the macrosegregation of antimony phosphorus, instead
The performance of product can be reduced.
Preferably, the mass ratio of the antimony powder and phosphorus powder is (1.5-1.8): 1.Antimony powder and phosphorus powder are that the present invention must can not
Few element, and the quality of the two needs to control in OK range, the synergistic effect of both competence exertions.
Preferably, the partial size of the silica is 50-150nm.The silica of appropriate particle size in the base can
It is uniformly distributed, induces the generation of composite oxides.
Preferably, the rare earth oxide is one kind or more of yttrium oxide, lanthana, samarium oxide, gadolinium oxide, holimium oxide
Kind.
Preferably, the rare earth oxide is lanthana.Lanthana is currently preferred rare earth oxide, with respect to it
His rare earth oxide can be acted on preferably with antimony phosphorus powder.
Preferably, the lubricant is the one or more of paraffin, hard fatty acids zinc, lithium stearate or polyethylene wax.
Another object of the present invention can be achieved through the following technical solutions: a kind of preparation side of guider of shock absorber
Method, the preparation method comprises the following steps: the raw material weighed according to the ratio carries out ball milling, dry-pressing formed, shaped article heating
To 450-550 DEG C, heat preservation ultrasonic treatment 20-30min is pressed again after cooling, is subsequently placed in vacuum drying oven with the heating of 1-1.5 DEG C/s
To 1500-1700 DEG C, heat preservation sintering 1-2h.
For product after molding first at 450-550 DEG C, heat preservation ultrasonic treatment, ultrasound removes the gas inside powder, reduces
The generation of follow-up sintering hole, after gas removes, green compact becomes loosely, to need further to press again and be allowed to be compacted.Then slowly rise
For temperature to sintering temperature, the fusing point of nano SiO 2 particle is higher, in slow temperature-rise period, Fe powder, nickel powder, antimony powder, phosphorus powder,
Rare earth oxide, lubricant are more first melting than silica, and the composite oxides formed at this time are along evenly dispersed titanium dioxide
Nano silicon particles distribution, improves the uniformity of composite oxides.
It dry-pressing formed is carried out under 150-200MPa pressure preferably, described；It is described to be pressed in 350-450MPa pressure again
Lower progress.Molding pressure should not be too high, will affect the ultrasonic degassing effect in later period, and multiple pressure uses elevated pressures again, and compacting is
Green compact after deaerated.
Preferably, the cooling is carried out with the rate of 20-50 DEG C/s.Cooling requirement after degasification quickly carries out, with
Exempt from during Slow cooling, gas escapes into again.
Compared with prior art, the present invention by conventional sintered powder add silica, antimony powder, phosphorus powder, in conjunction with
The special preparation process of the present invention improves the hardness, resistance to of product so that the mutual promoting action between element during the sintering process
Mill property improves product density and reduces product size tolerance.And it is provided by the present invention preparation is simple, be suitble to industry
Metaplasia produces.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 80 parts；Nickel powder: 20 parts；Silica: 5 parts；Antimony powder: 1.0 parts；Phosphorus powder: 1.0 parts；Yttrium oxide: 1.2 parts；
Hard fatty acids zinc: 0.8 part.Wherein the partial size of silica is 300nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, protects
Temperature ultrasonic treatment 25min, with the rate of 30 DEG C/s it is cooling after press again, multiple pressure pressure is 450MPa, be subsequently placed in vacuum drying oven with
1.5 DEG C/s's is warming up to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 2
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 80 parts；Nickel powder: 20 parts；Silica: 5 parts；Antimony powder: 1.2 parts；Phosphorus powder: 0.8 part；Yttrium oxide: 1.2 parts；
Hard fatty acids zinc: 0.8 part.Wherein the partial size of silica is 300nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, protects
Temperature ultrasonic treatment 25min, with the rate of 30 DEG C/s it is cooling after press again, multiple pressure pressure is 450MPa, be subsequently placed in vacuum drying oven with
1.5 DEG C/s's is warming up to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 3
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 80 parts；Nickel powder: 20 parts；Silica: 5 parts；Antimony powder: 1.2 parts；Phosphorus powder: 0.8 part；Yttrium oxide: 1.2 parts；
Hard fatty acids zinc: 0.8 part.Wherein the partial size of silica is 100nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, protects
Temperature ultrasonic treatment 25min, with the rate of 30 DEG C/s it is cooling after press again, multiple pressure pressure is 450MPa, be subsequently placed in vacuum drying oven with
1.5 DEG C/s's is warming up to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 4
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 80 parts；Nickel powder: 20 parts；Silica: 5 parts；Antimony powder: 1.2 parts；Phosphorus powder: 0.8 part；Lanthana: 1.2 parts；
Hard fatty acids zinc: 0.8 part.Wherein the partial size of silica is 100nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, protects
Temperature ultrasonic treatment 25min, with the rate of 30 DEG C/s it is cooling after press again, multiple pressure pressure is 450MPa, be subsequently placed in vacuum drying oven with
1.5 DEG C/s's is warming up to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 5
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 80 parts；Nickel powder: 20 parts；Silica: 5 parts；Antimony powder: 1.2 parts；Phosphorus powder: 0.8 part；Lanthana: 1.2 parts；
Polyethylene wax: 0.8 part.Wherein the partial size of silica is 100nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, protects
Temperature ultrasonic treatment 25min, with the rate of 30 DEG C/s it is cooling after press again, multiple pressure pressure is 450MPa, be subsequently placed in vacuum drying oven with
1.5 DEG C/s's is warming up to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 6
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 80 parts；Nickel powder: 20 parts；Silica: 5 parts；Antimony powder: 1.2 parts；Phosphorus powder: 0.8 part；Lanthana: 1.2 parts；
Polyethylene wax: 0.8 part.Wherein the partial size of silica is 100nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, protects
Temperature ultrasonic treatment 25min, with the rate of 10 DEG C/s it is cooling after press again, multiple pressure pressure is 450MPa, be subsequently placed in vacuum drying oven with
1.5 DEG C/s's is warming up to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 7
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 70 parts；Nickel powder: 15 parts；Silica: 3 parts；Antimony powder: 1.8 parts；Phosphorus powder: 1.1 parts；Lanthana: 1.4 parts；
Polyethylene wax: 0.5 part.Wherein the partial size of silica is 50nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 150MPa forming under the pressure, shaped article is warming up to 550 DEG C, protects
Temperature ultrasonic treatment 20min, with the rate of 30 DEG C/s it is cooling after press again, multiple pressure pressure is 400MPa, be subsequently placed in vacuum drying oven with
1.2 DEG C/s's is warming up to 1600 DEG C, heat preservation sintering 1h.Sintered products obtain guider of shock absorber after finishing.
Embodiment 8
The raw material of the present embodiment guider of shock absorber is the component of following parts by weight:
Fe powder: 60 parts；Nickel powder: 10 parts；Silica: 2 parts；Antimony powder: 0.8 part；Phosphorus powder: 0.5 part；Lanthana: 0.8 part；
Polyethylene wax: 0.8 part.Wherein the partial size of silica is 150nm.
The raw material is weighed according to the ratio and carries out ball milling, and in 180MPa forming under the pressure, shaped article is warming up to 4500 DEG C, protects
Temperature ultrasonic treatment 30min, with the rate of 40 DEG C/s it is cooling after press again, multiple pressure pressure is 350MPa, be subsequently placed in vacuum drying oven with
1.0 DEG C/s's is warming up to 1650 DEG C, heat preservation sintering 2h.Sintered products obtain guider of shock absorber after finishing.
Comparative example 1
Comparative example 1 and the difference of embodiment 5 are that the guider of shock absorber raw material of comparative example 1 does not include antimony powder and phosphorus powder,
It is other same as Example 5, it does not repeat herein.
Comparative example 2
Comparative example 2 and the difference of embodiment 5 are, antimony powder is not included in the guider of shock absorber raw material of comparative example 2, other
It is same as Example 5, it does not repeat herein.
Comparative example 3
Comparative example 3 and the difference of embodiment 5 are, phosphorus powder is not included in the guider of shock absorber raw material of comparative example 3, other
It is same as Example 5, it does not repeat herein.
Comparative example 4
Comparative example 4 and the difference of embodiment 5 are, silica is not included in the guider of shock absorber raw material of comparative example 4,
It is other same as Example 5, it does not repeat herein.
Comparative example 5
Comparative example 5 and the difference of embodiment 5 are that the guider of shock absorber raw material of comparative example 5 is Fe powder: 85 parts；Nickel powder:
9 parts；Silica: 7 parts；Antimony powder: 2.0 parts；Phosphorus powder: 1.8 parts；Lanthana: 1.8 parts；Polyethylene wax: 1.2 parts.Other and implementation
Example 5 is identical, does not repeat herein.
Comparative example 6
Comparative example 6 and the difference of embodiment 5 be, the guider of shock absorber of comparative example 6 the preparation method comprises the following steps: claiming according to the ratio
It takes the raw material to carry out ball milling to be subsequently placed in vacuum drying oven in 200MPa forming under the pressure and be warming up to 1700 with 1.5 DEG C/s
DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.It is other same as Example 5, it does not go to live in the household of one's in-laws on getting married herein
It states.
Comparative example 7
Comparative example 7 and the difference of comparative example 6 be, the briquetting pressure of comparative example 7 is 450MPa, other with 6 phase of comparative example
Together.
Comparative example 8
Comparative example 8 and the difference of embodiment 5 are that the shaped article of comparative example 8 is warming up to 500 DEG C, under no ultrasound
Keep the temperature 25min.It is other same as Example 5, it does not repeat herein.
Comparative example 9
Comparative example 9 and the difference of embodiment 5 are that the shaped article of comparative example 9 is placed in vacuum drying oven with the heating of 5 DEG C/s
To 1700 DEG C.It is other same as Example 5, it does not repeat herein.
Comparative example 10
Comparative example 10 and the difference of embodiment 5 be, the guider of shock absorber of comparative example 10 the preparation method comprises the following steps: according to the ratio
It weighs the raw material and carries out ball milling, in 200MPa forming under the pressure, shaped article is warming up to 500 DEG C, heat preservation ultrasonic treatment
25min, to press again after the rate cooling of 30 DEG C/s, multiple pressure pressure is 200MPa, is subsequently placed in vacuum drying oven with the liter of 1.5 DEG C/s
Temperature is to 1700 DEG C, heat preservation sintering 1.5h.Sintered products obtain guider of shock absorber after finishing.
The measurement of hardness, wearability, density, dimensional tolerance is carried out to the guider of embodiment 1-8 and comparative example 1-10.
The results are shown in Table 1.
The performance parameter of 1 embodiment 1-8 of table and comparative example 1-10 guider
Embodiment 5,7,8 is used as most highly preferred embodiment of the invention, has an optimal performance, and comparative example 1-10 is because must be at
Divide or the missing of step, performance parameter are far below embodiment 5.
Specific embodiment described in the present invention only illustrate the spirit of the present invention by way of example.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. a kind of guider of shock absorber, which is characterized in that the raw material of the guider of shock absorber is the component of following parts by weight:
Fe powder: 60-80 parts；Nickel powder: 10-20 parts；Silica: 2-6 parts；Antimony powder: 0.8-2.1 parts；Phosphorus powder: 0.5-1.2 parts；It is dilute
Native oxide: 0.8-1.5 parts；Lubricant: 0.5-1.0 parts.
2. a kind of guider of shock absorber according to claim 1, which is characterized in that the mass ratio of the antimony powder and phosphorus powder is
(1.5-1.8): 1.
3. a kind of guider of shock absorber according to claim 1, which is characterized in that the partial size of the silica is 50-
150nm。
4. a kind of guider of shock absorber according to claim 1, which is characterized in that the rare earth oxide be yttrium oxide,
Lanthana, samarium oxide, gadolinium oxide, holimium oxide it is one or more.
5. a kind of guider of shock absorber according to claim 1, which is characterized in that the lubricant is paraffin, tallow
Sour zinc, lithium stearate or polyethylene wax it is one or more.
6. a kind of preparation method of any guider of shock absorber of claim 1-5, which is characterized in that the preparation method
The following steps are included: weighing the raw material according to the ratio carries out ball milling, dry-pressing formed, shaped article is warming up to 450-550 DEG C, heat preservation
It is ultrasonically treated 20-30min, is pressed again after cooling, is subsequently placed in vacuum drying oven and 1500- is warming up to the heating rate of 1-1.5 DEG C/s
1700 DEG C, heat preservation sintering 1-2h.
7. a kind of preparation method of guider of shock absorber according to claim 6, which is characterized in that it is described it is dry-pressing formed
It is carried out under 150-200MPa pressure；Described be pressed under 350-450MPa pressure again carries out.
8. a kind of preparation method of guider of shock absorber according to claim 6, which is characterized in that the cooling is with 20-
The rate of 50 DEG C/s carries out.
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| CN201711417657.8A CN108130483B (en) | 2017-12-25 | 2017-12-25 | A kind of guider of shock absorber and preparation method thereof |
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| CN201711417657.8A CN108130483B (en) | 2017-12-25 | 2017-12-25 | A kind of guider of shock absorber and preparation method thereof |
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| CN108130483B true CN108130483B (en) | 2019-08-02 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59197549A (en) * | 1983-04-25 | 1984-11-09 | Mitsubishi Metal Corp | Fe-base sintered alloy for armature of electromagnetic coupling apparatus |
| CN102335744B (en) * | 2011-09-22 | 2013-06-19 | 安徽奥泰粉末冶金有限公司 | Production process of guider of front shock absorber of automobile |
| CN102921942B (en) * | 2012-10-17 | 2015-01-14 | 宁波拓发汽车零部件有限公司 | Guider of damper and preparation method of guider |
| CN105149569A (en) * | 2015-08-31 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy damper piston rod and preparation method thereof |
| CN105478743A (en) * | 2015-11-27 | 2016-04-13 | 宁波市群星粉末冶金有限公司 | Guider of automobile shock absorber and manufacturing method thereof |
| CN107470632B (en) * | 2017-07-27 | 2019-07-26 | 宁波金钟粉末冶金有限公司 | A kind of guider of shock absorber |
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2017
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