CN107686938A - A kind of iron-based powder metallurgy friction material and preparation method thereof - Google Patents
A kind of iron-based powder metallurgy friction material and preparation method thereof Download PDFInfo
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- CN107686938A CN107686938A CN201710597078.XA CN201710597078A CN107686938A CN 107686938 A CN107686938 A CN 107686938A CN 201710597078 A CN201710597078 A CN 201710597078A CN 107686938 A CN107686938 A CN 107686938A
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0235—Starting from compounds, e.g. oxides
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Abstract
The invention provides a kind of iron-based powder metallurgy friction material, in the iron-based powder metallurgy friction material, by weight percentage, including 1.0%~2.1% C and Fe of surplus；The iron-based powder metallurgy friction material is formed by iron-based powder and organic carbon source powder compacting sintering.The present invention further correspondingly provides the preparation method of the iron-based powder metallurgy friction material, the method of the present invention need not add organic pre-mix powder, the graphite for replacing adding in prior powder metallurgy technique using organic carbon source powder, the iron-based powder metallurgy friction material being prepared by this method possesses excellent wearability, preferably moulding and higher intensity, meets industrial requirement.
Description
Technical field
The invention belongs to powder metallurgical technology, more particularly to a kind of ferrous based powder metallurgical friction resistant material and its preparation
Method.
Background technology
Prior powder metallurgy technique is that the various powder such as mechanical mixture such as iron powder, graphite powder is uniform, then by compacting
The shape of product required for moulding process obtains, last direct sintering, which is densified to obtain, has given shape, size and performance
Product.With the high speed development of modern industry, the demand of prior powder metallurgy ferrio wear-resistant material has very big lifting, graphite
Powder is widely used in powder metallurgical technique as carbon source.But because the density of graphite is far below iron, cause stone in mixed powder
Proportion between ink powder and matrix powder separates.Moreover, the full-size(d) of graphite in the tissue is larger, low intensity (tensile strength
Only 20MPa or so), combined with powder such as iron powders not close, cause the skewness of graphite, hole in material more, fine and close
Relatively low, low intensity is spent, has a strong impact on the combination property of organization material, can not meet the needs of engineer applied.And to powder metallurgy
For technique, voidage, consistency, the dimensional stability of product often determine that the final performance difference powder density of product is poor
It is different larger, it is insufficient to allow powder to be well mixed only with simple mechanical mixture, compacting sample rate is uniform, sintered products
Can be stable, it is often inevitable so as to be segregated.
At present, typically solves the segregation of graphite in powder metallurgy by adding organic pre-mix powder；AddO-on therapy
Fine grained be glued fast to basic powder surface, so as to reduce its segregation in mixed-powder, improve sintering after it is microcosmic
The uniformity of tissue.Because organic adhesive premixing flour needs to be directed to material specific design, high expensive, practical application can not be general
And.Therefore, design and develop a kind of wide adaptability, the iron-based powder metallurgy friction material of high comprehensive performance have it is highly important
Meaning.
The content of the invention
The technical problems to be solved by the invention are to overcome the shortcomings of to mention in background above technology and defect, there is provided one
Kind high intensity, high tenacity, the iron-based powder metallurgy friction material of high comprehensive performance, and its preparation method is accordingly provided.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
A kind of iron-based powder metallurgy friction material, in the iron-based powder metallurgy friction material, by weight percentage, bag
Include 1.0%~2.1% C and the Fe of surplus；The iron-based powder metallurgy friction material is by iron-based powder and organic carbon source powder
Compacting sintering forms；The iron-based powder metallurgy friction material even tissue, consistency are 93%~98%, and elongation percentage is
5.0%~18.5%, tensile strength is 489~1341MPa, and Vickers hardness is 172~622HV.
The inventive concept total as one, the present invention also provide a kind of preparation method of iron-based powder metallurgy friction material,
The preparation method comprises the following steps：
It is first that iron-based powder and organic carbon source powder is well mixed rear compressing, pressed compact is then put into logical inert gas
Pre-sintered degassing is carried out in the tube furnace of (such as argon gas), treats in tube furnace that stable gas pressure i.e. no longer exhaust can close power supply and treat stove
Pre-sintered blank is taken out after cold；Finally pressed compact is sintered under vacuum or air pressure conditions, be made by graphite, austenite shells,
The iron-based powder metallurgy friction material of the even tissue of the composition of pearlite.
Above-mentioned preparation method, it is preferred that the organic carbon source powder is glucose, sucrose and/or hydrocarbon powder
End；The quality of the organic carbon source powder accounts for the 4%~6% of mixture quality.
Above-mentioned preparation method, it is preferred that the iron-based powder is hydroxy iron powder and/or atomized iron powder；The ferrous alloy powder
The average grain diameter at end is 8~12 μm, and quality accounts for the 94%~96% of mixture quality.It is furthermore preferred that the iron-based powder is hydroxyl
Base iron powder.
Above-mentioned preparation method, it is preferred that the temperature of the pre-sintered processing is 200 DEG C~700 DEG C (heat of organic carbon source
Decomposition temperature), the time that organic carbon source fully reacts degassing is 30~60min.
Above-mentioned preparation method, it is preferred that the mixed processing is mixed with V-type batch mixer, velocity of rotation 15
~30r/min, mixing time are 6~8h.
Above-mentioned preparation method, it is preferred that the compressing processing is compression molding or cold isostatic compaction；The mould
The pressure of molded processing is 200~600MPa, and the dwell time is 5~10s；The pressure of cold isostatic compaction processing is
100~300MPa, dwell time are 2~5min.
Above-mentioned preparation method, it is preferred that the heating rate of the sintering processes is 5~20 DEG C/min, pressure is 0~
10MPa, holding temperature are 1000 DEG C~1300 DEG C, and soaking time is 1~4h, then furnace cooling.
Above-mentioned preparation method, it is preferred that also include hot rolling treatment, the temperature of the hot rolling treatment after the sintering processes
For 850 DEG C~1000 DEG C, every time volume under pressure of milling train is 5%~30%, often crosses a time and carries out melting down heating, total deformation is big
In 80%.After hot rolling treatment, the form of graphite-phase can change, from it is original it is spherical be changed into flat, so as to lubricate
Performance is improved, abrasion is reduced.Powder metallurgy product is difficult often to accomplish full densification, however consistency again largely
The structure property of powder metallurgy product is influenceed, thermal deformation field of the invention can also allow more crisp powder metallurgy product in middle height
Temperature possesses to be deformed under the tissue of preferable plasticity, greatly improves the consistency of material, so as to improve the performance of material.
Above-mentioned preparation method, it is preferred that after the hot rolling treatment also include heat treatment, the heat treatment process include with
Lower concrete operations：Material after hot rolling treatment is incubated 1~2h at 700 DEG C~900 DEG C, then quenched, after quenching
Temper is carried out at 200 DEG C~500 DEG C, temper is incubated 1~2h.Quenching process can be according to required properties of product and institute
Quenching rate is needed to select the different hardening medias such as water, salt solution, oil.Quenching greatly improves material by changing the form of tissue
The intensity of material, while fragility can accordingly increase, and the internal stress that can alleviate quenched steel component is tempered, its hardness and intensity are reduced,
Material ductility or toughness are improved, the heat treatment mode that quenching and tempering combine generally is lifted while partial extensibility is sacrificed
The intensity and hardness of material.According to the purposes of material requested, heat treatment process parameter is suitably adjusted, can be produced with property
The material of energy gradient, meets the needs of different.
Compared with prior art, the advantage of the invention is that：
(1) present invention need not add organic pre-mix powder, and prior powder metallurgy work is replaced using organic carbon source powder
The graphite added in skill, because organic carbon source size is smaller, mix with matrix iron powder more uniform, preferentially melted in sintering process
Decompose, play a part of activated sintering, and spread comparatively fast, uniformly, regular and uniform iron-base superfine is formed in sintering process
Heterogeneous structure, so as to which the iron-based powder metallurgy friction material of stable performance be made.
(2) follow-up thermal deformation and Technology for Heating Processing of the invention can regulate and control the performance of product, further eliminate sintered
Due to hole caused by organic carbon source degassing etc. in journey, make the material of preparation close to full densification, and its consistency is up to 98%, from
And enhance the combination property of product.
(3) iron-based powder metallurgy friction material friction and wear behavior of the invention is preferable, the fretting wear of existing stabilization because
Number, from 0.3 to 0.7, but also with excellent wearability, wear extent is full compared to for the cast iron of engineer applied and in no way inferior
Sufficient industrial requirement.
(4) iron-based powder metallurgy friction material combination property of the invention is excellent, especially has preferably moulding and higher
Intensity, its intensity are up to 1341MPa, and elongation percentage is up to 18.5%, and hardness is up to 622HV, meets industrial requirement.
(5) graphite that preparation technology of the invention replaces adding in prior powder metallurgy technique using organic carbon source powder,
The problem that avoiding the addition forming agent such as stearic acid or paraffin, without degreasing in preparation process, secures sintering side
Formula, technological process is simplified, and organic carbon source is cheap and easy to get, reduces production cost, suitable for industrialized production.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the metallograph of iron-based powder metallurgy friction material in the embodiment of the present invention 1；
Fig. 2 is the metallograph of iron-based powder metallurgy friction material in the embodiment of the present invention 2；
Fig. 3 is the metallograph of iron-based powder metallurgy friction material in the embodiment of the present invention 3；
Fig. 4 is the stereoscan photograph of iron-based powder metallurgy friction material in the embodiment of the present invention 4；
Fig. 5 is the stereoscan photograph of iron-based powder metallurgy friction material in the embodiment of the present invention 4；
Fig. 6 be the iron-based powder metallurgy friction material of the embodiment of the present invention 1~5 with the fretting wear of industrial gray cast iron 250 because
Number comparison diagram；
Fig. 7 is the metallograph of iron-based powder metallurgy friction material in comparative example 1 of the present invention；
Fig. 8 is the metallograph of iron-based powder metallurgy friction material in comparative example 2 of the present invention.
Embodiment
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment to invent herein do it is more complete
Face, meticulously describe, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, all technical terms used hereinafter are generally understood that implication phase with those skilled in the art
Together.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to the limitation present invention's
Protection domain.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1：
A kind of iron-based powder metallurgy friction material of the invention, in the iron-based powder metallurgy friction material, with weight percent
Than counting, include 1.7% C and 98.3% Fe；The iron-based powder metallurgy friction material is by hydroxy iron powder and glucose powder
Compacting sintering forms.
The preparation method of the iron-based powder metallurgy friction material of the present embodiment, comprises the following steps：
First by hydroxy iron powder and glucose powder, batch mixing is uniform in V-type batch mixer, and the velocity of rotation of batch mixer is 20r/
Min, mixing time 8h；Wherein, the quality of glucose powder account for mixing after quality of material 4.7%, the quality of hydroxy iron powder
95.3% of quality of material after mixing is accounted for, the average grain diameter of hydroxy iron powder is 10 μm；Compound is placed in a diameter of 25mm glue
It is compressing using isostatic cool pressing after jolt ramming in leather hose, pressing pressure 200MPa, dwell time 3min；Then by pressed compact
It is placed in tube furnace and leads to argon-degassed, 700 DEG C are risen to 10 DEG C/min heating rate, be incubated 60min, with stove after stable gas pressure
Cooling further takes out；Finally pressed compact is placed in gas pressure sintering stove, rises to 1200 DEG C with 10 DEG C/min heating rate, argon gas atmosphere
Pressure is 5MPa, after being incubated 60min, furnace cooling, iron-based powder metallurgy friction material is made.
The properties test result of the iron-based powder metallurgy friction material of the present embodiment is shown in Table 1；Its metallograph such as Fig. 1
Shown, as seen from the figure, it is organized by uniform group of pearlite outside graphite, the austenite shells being centered around around graphite and austenite
Into, wherein, graphite is spherical.
Embodiment 2：
A kind of iron-based powder metallurgy friction material of the invention, in the iron-based powder metallurgy friction material, with weight percent
Than counting, include 1.9% C and 98.1% Fe；The iron-based powder metallurgy friction material is by hydroxy iron powder and glucose powder
Compacting sintering forms.
The preparation method of the iron-based powder metallurgy friction material of the present embodiment, comprises the following steps：
First by hydroxy iron powder and glucose powder, batch mixing is uniform in V-type batch mixer, and the velocity of rotation of batch mixer is 20r/
Min, mixing time 8h；Wherein, the quality of glucose powder account for mixing after quality of material 5.6%, the quality of hydroxy iron powder
94.4% of quality of material after mixing is accounted for, the average grain diameter of hydroxy iron powder is 10 μm；Compound is placed in a diameter of 25mm glue
It is compressing using isostatic cool pressing after jolt ramming in leather hose, pressing pressure 300Mpa, dwell time 3min, obtain a diameter of
22mm cylinder pressed compact；Then pressed compact is placed in tube furnace and leads to argon-degassed, 700 are risen to 10 DEG C/min heating rate
DEG C, be incubated 60min, after stable gas pressure furnace cooling further take out；Finally pressed compact is placed in gas pressure sintering stove, with 10 DEG C/min's
Heating rate rises to 1200 DEG C, argon atmospheric pressure 5MPa, and after being incubated 60min, furnace cooling, obtained ferrous based powder metallurgical rubs
Wipe material.
The properties test result of the iron-based powder metallurgy friction material of the present embodiment is shown in Table 1；Its metallograph such as Fig. 2
Shown, as seen from the figure, it is organized by uniform group of pearlite outside graphite, the austenite shells being centered around around graphite and austenite
Into, wherein, graphite is latticed.
Embodiment 3：
A kind of iron-based powder metallurgy friction material of the invention, in the iron-based powder metallurgy friction material, with weight percent
Than counting, include 1.5% C and 98.5% Fe；The iron-based powder metallurgy friction material is by hydroxy iron powder and glucose powder
Compacting sintering forms.
The preparation method of the iron-based powder metallurgy friction material of the present embodiment is same as Example 1, and difference is this implementation
Also include hot rolling treatment after sintering processes in example, including operate in detail below：By the material after being sintered in embodiment 1 at 900 DEG C
Hot rolling is carried out, total deformation 82%, every time volume under pressure of milling train is 20% (about 4mm), often crosses a time and carries out melting down heating.
The properties test result of the iron-based powder metallurgy friction material of the present embodiment is shown in Table 1；Its metallograph such as Fig. 3
It is shown, as seen from the figure, it is hot rolled after iron-based powder metallurgy friction material even tissue and refinement it is obvious, globular graphite in tissue
It is obviously prolonged along rolling direction.
Embodiment 4：
A kind of iron-based powder metallurgy friction material of the invention, in the iron-based powder metallurgy friction material, with weight percent
Than counting, include 1.3% C and 98.7% Fe；The iron-based powder metallurgy friction material is by hydroxy iron powder and glucose powder
Compacting sintering forms.
The preparation method of the iron-based powder metallurgy friction material of the present embodiment is same as Example 3, and difference is this implementation
Also include heat treatment in example after hot rolling treatment, including operate in detail below：By the material after being heat-treated in embodiment 3 at 800 DEG C
Lower insulation 2h, is then quenched, and hardening media is water, carries out temper, temper insulation after quenching at 400 DEG C
90min。
The properties test result of the iron-based powder metallurgy friction material of the present embodiment is shown in Table 1；Its stereoscan photograph
As shown in figure 4, as seen from the figure, the iron-based powder metallurgy friction material even tissue of the present embodiment after heat treatment and have certain
Chinampa shape is presented in the softening of degree, surrounding tissue.
Embodiment 5：
A kind of iron-based powder metallurgy friction material of the invention, in the iron-based powder metallurgy friction material, with weight percent
Than counting, include 1.2% C and 98.8% Fe；The iron-based powder metallurgy friction material is by hydroxy iron powder and glucose powder
Compacting sintering forms.
The preparation method of the iron-based powder metallurgy friction material of the present embodiment is same as Example 3, and difference is this implementation
Also include heat treatment in example after hot rolling treatment, including operate in detail below：By the material after being heat-treated in embodiment 3 at 750 DEG C
Lower insulation 2h, is then quenched, and hardening media is water, carries out temper, temper insulation after quenching at 300 DEG C
90min。
The properties test result of the iron-based powder metallurgy friction material of the present embodiment is shown in Table 1；Its stereoscan photograph
As shown in figure 5, as seen from the figure, the iron-based powder metallurgy friction material even tissue of the present embodiment after heat treatment and have certain
The pattern that point-like is combined with needle-like is presented in the softening of degree, surrounding tissue.
The 1-5 of the embodiment of the present invention of table 1 iron-based powder metallurgy friction material properties test result
| Vickers hardness/HV | Tensile strength/MPa | Elongation percentage/% | Consistency/% | |
| Embodiment 1 | 172 | 489 | 18.5 | 95 |
| Embodiment 2 | 151 | 474 | 11.6 | 93 |
| Embodiment 3 | 317 | 827 | 8.3 | 98 |
| Embodiment 4 | 408 | 1055 | 6.3 | 98 |
| Embodiment 5 | 622 | 1341 | 5.0 | 98 |
The iron-based powder metallurgy friction material of the embodiment of the present invention 1~5 is moved reciprocatingly under 20N load, with industry
The comparison diagram of the fretting wear factor of gray cast iron 250 is as shown in fig. 6, as seen from the figure, iron-based powder metallurgy friction material of the invention
Compare that the fretting wear factors curve of gray cast iron 250 is more steady, and wear factor possesses excellent wearability from 0.3 to 0.7.
Comparative example 1：
A kind of iron-based powder metallurgy friction material, formed by hydroxy iron powder and powdered graphite compacting sintering, with weight percent
Than counting, include 1.7% C and 98.3% Fe.
The preparation method of the iron-based powder metallurgy friction material of this comparative example, comprises the following steps：
First by hydroxy iron powder and powdered graphite, batch mixing is uniform in V-type batch mixer, and the velocity of rotation of batch mixer is 20r/
Min, mixing time 8h；Wherein, the quality of hydroxy iron powder account for mixing after quality of material 98.3%, the average grain of hydroxy iron powder
Footpath is 10 μm；Compound is placed in a diameter of 25mm hose, compressing using isostatic cool pressing after jolt ramming, pressing pressure
For 200MPa, dwell time 3min, a diameter of 21mm cylinder pressed compact is obtained；Pressed compact is placed in gas pressure sintering stove, sintered
Air pressure is 5MPa, and 1200 DEG C are risen to 10 DEG C/min heating rate, after being incubated 60min, furnace cooling, iron-based powder smelting is made
Golden friction material.
The properties test result of the iron-based powder metallurgy friction material of this comparative example is shown in Table 2；Its metallograph such as Fig. 7
Shown, as seen from the figure, its tissue is made up of graphite, ferrite, pearlite, organize compared with organized in embodiment 1 it is thick and distribution not
Uniformly.
Comparative example 2：
A kind of iron-based powder metallurgy friction material, formed by hydroxy iron powder and powdered graphite compacting sintering, with weight percent
Than counting, include 1.9% C and 98.1% Fe.
The preparation method of the iron-based powder metallurgy friction material of this comparative example, comprises the following steps：
First by hydroxy iron powder and powdered graphite, batch mixing is uniform in V-type batch mixer, and the velocity of rotation of batch mixer is 20r/
Min, mixing time 8h；Wherein, the quality of hydroxy iron powder account for mixing after quality of material 98.1%, the average grain of hydroxy iron powder
Footpath is 10 μm；Compound is placed in a diameter of 25mm hose, compressing using isostatic cool pressing after jolt ramming, pressing pressure
For 300MPa, dwell time 3min, a diameter of 23mm cylinder pressed compact is obtained；Pressed compact is placed in gas pressure sintering stove, sintered
Air pressure is 5MPa, and 1200 DEG C are risen to 10 DEG C/min heating rate, after being incubated 60min, furnace cooling, iron-based powder smelting is made
Golden friction material.
The properties test result of the iron-based powder metallurgy friction material of this comparative example is shown in Table 2；Its metallograph such as Fig. 8
Shown, as seen from the figure, its tissue is made up of graphite, ferrite, pearlite, organizes, distribution thicker compared with being organized in comparative example 1
It is uneven, and the form of graphite is changeable, some is gathered, some is scattered.
The ferrous based powder metallurgical graphite material properties test result of the comparative example 1,2 of the present invention of table 2
| Vickers hardness/HV | Tensile strength/MPa | Elongation percentage/% | Consistency/% | |
| Comparative example 1 | 164 | 312 | 10.3 | 94 |
| Comparative example 2 | 143 | 278 | 7.6 | 90 |
With reference to Tables 1 and 2, pass through comparative example 1,2 and the items of the iron-based powder metallurgy friction material of comparative example 1,2
The performance test results, it can be deduced that, it is more or less the same in cost, in the case of final composition identical, preparation method of the invention life
The iron-based powder metallurgy friction material performance of production is far above current industrial iron-based powder metallurgy friction material.
Claims (10)
1. a kind of iron-based powder metallurgy friction material, it is characterised in that in the iron-based powder metallurgy friction material, with weight hundred
Divide than meter, including 1.0%~2.1% C and Fe of surplus；The iron-based powder metallurgy friction material is by iron-based powder and organic
Carbon source powder compacting sintering forms；The iron-based powder metallurgy friction material even tissue, consistency are 93%~98%, extension
Rate is 5.0%~18.5%, and tensile strength is 489~1341MPa, and Vickers hardness is 172~622HV.
2. a kind of preparation method of iron-based powder metallurgy friction material, it is characterised in that the preparation method comprises the following steps：
It is first that iron-based powder and organic carbon source powder is well mixed rear compressing, then pressed compact is put into the pipe of logical inert gas
Pre-sintered degassing is carried out in formula stove, is finally sintered pressed compact under vacuum or air pressure conditions, obtained ferrous based powder metallurgical rubs
Wipe material.
3. preparation method according to claim 2, it is characterised in that the organic carbon source powder be glucose, sucrose and/
Or hydrocarbon powder；The quality of the organic carbon source powder account for mixing after quality of material 4%~6%.
4. the preparation method according to Claims 2 or 3, it is characterised in that the iron-based powder is hydroxy iron powder and/or mist
Change iron powder；The average grain diameter of the iron-based powder be 8~12 μm, quality account for mixing after quality of material 94%~96%.
5. the preparation method according to Claims 2 or 3, it is characterised in that the temperature of the pre-sintered processing for 200 DEG C~
700 DEG C, the time is 30~60min.
6. the preparation method according to Claims 2 or 3, it is characterised in that the mixed processing is carried out with V-type batch mixer
Mixing, velocity of rotation is 15~30r/min, and mixing time is 6~8h.
7. the preparation method according to Claims 2 or 3, it is characterised in that the compressing processing for compression molding or
Cold isostatic compaction；The pressure of the compression molding processing is 200~600MPa, and the dwell time is 5~10s；It is described cold etc. quiet
The pressure of molded processing is 100~300MPa, and the dwell time is 2~5min.
8. the preparation method according to Claims 2 or 3, it is characterised in that the heating rate of the sintering processes is 5~20
DEG C/min, pressure is 0~10MPa, and holding temperature is 1000 DEG C~1300 DEG C, and soaking time is 1~4h.
9. the preparation method according to Claims 2 or 3, it is characterised in that also include hot rolling treatment after the sintering processes,
The temperature of the hot rolling treatment is 850 DEG C~1000 DEG C, and every time volume under pressure of milling train is 5%~30%, often crosses a time and carries out
Heating is melted down, total deformation is more than 80%.
10. preparation method according to claim 9, it is characterised in that also include heat treatment after the hot rolling treatment, it is described
Heat treatment process includes operating in detail below：Material after hot rolling treatment is incubated 1~2h, Ran Houjin at 700 DEG C~900 DEG C
Row quenching, carries out temper at 200 DEG C~500 DEG C after quenching, temper is incubated 1~2h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112570707A (en) * | 2020-01-22 | 2021-03-30 | 沈阳市沈新粉末冶金制品有限公司 | Iron-based ferrite material and preparation method and application thereof |
| CN114645205A (en) * | 2022-03-21 | 2022-06-21 | 安徽工业大学 | Graphite-based powder metallurgy material for drilling and locking and preparation method thereof |
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| CN112570707B (en) * | 2020-01-22 | 2023-04-07 | 沈阳市沈新粉末冶金制品有限公司 | Iron-based ferrite material and preparation method and application thereof |
| CN114645205A (en) * | 2022-03-21 | 2022-06-21 | 安徽工业大学 | Graphite-based powder metallurgy material for drilling and locking and preparation method thereof |
| CN114645205B (en) * | 2022-03-21 | 2022-08-30 | 安徽工业大学 | Graphite-based powder metallurgy material for drilling and locking and preparation method thereof |
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| CN107686938B (en) | 2019-06-14 |
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