CN109128188A - A kind of disc brake piston powder metallurgical processing moulding process - Google Patents
A kind of disc brake piston powder metallurgical processing moulding process Download PDFInfo
- Publication number
- CN109128188A CN109128188A CN201811077482.5A CN201811077482A CN109128188A CN 109128188 A CN109128188 A CN 109128188A CN 201811077482 A CN201811077482 A CN 201811077482A CN 109128188 A CN109128188 A CN 109128188A
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- Prior art keywords
- disc brake
- brake piston
- powder
- parts
- embryo
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Classifications
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- 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
- B22F1/105—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing inorganic lubricating or binding agents, e.g. metal salts
-
- 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
Abstract
The invention discloses a kind of disc brake piston powder metallurgical processing moulding process, specific steps are as follows: S1: stock；S2: mixing；S3: molding；S4: it fires；S5: finishing；S6: surface treatment.The present invention passes through metal powder as main material, using powder metallurgical technique, by increasing secondary compacting among heat treatment twice, blank internal structure can be made even closer, molded part structural strength is improved, in the case where guaranteeing equal performance and quality condition, saves metal, reduce production cost, by carrying out micro-arc oxidation treatment to surface of shaped parts, increases the inoxidizability and wearability of workpiece surface, improve product quality, simple process improves production efficiency.
Description
Technical field
The invention belongs to metallurgical processing technical fields, and more specifically more particularly to a kind of disc brake piston powder metallurgy adds
Work moulding process.
Background technique
Powder metallurgy is to produce metal powder or made with metal powder (or mixture of metal powder and non-metal powder)
For raw material, by shaping and being sintered, the technology of manufacture metal material, composite material and various types product.Powder smelting
The advantages that fitting has saving metal, reduces production cost.
Currently, traditional disc brake piston is processed using copper, iron, aluminium material, at high cost, processing technology is complicated, and processes
Piston face afterwards will be processed using electroplating technology, be unfavorable for environmental protection.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of disc brake piston powder smelting proposed
Metalworking moulding process.
To achieve the above object, the invention provides the following technical scheme:
A kind of disc brake piston powder metallurgical processing moulding process, specific steps are as follows:
S1: stock weighs 200~300 parts of iron powder according to parts by weight, 30~50 parts of copper powder, 10~18 parts of alumina powder, slides
4~10 parts of mountain flour, 20~30 parts of tungsten-cobalt-titanium alloy powder, iron powder is used 250~300 by 2~6 parts of cadmium sulfide, 1~5 part of graphite
Mesh screen sieving processing, remaining raw material are handled using 200 mesh filter screen sievings；
S2: mixing sequentially adds above-mentioned raw materials in blender, and heated by thermocouple to raw material, is mixed equal
Even mixture, it is spare；
S3: molding uses pressing in 3~5 addition metallurgical powder molding dies of mixture point after every addition mixed once material
Machine follows compacting, and pressure is 3~5MPa when pressing, compresses 3~5 seconds, until mixture is full of metallurgical powder molding die, later
Using pressing machine with 300~500 MPa pressure compaction 10~20 seconds, disc brake piston embryo material is obtained, it is spare；
S4: firing, and heats intermediate-frequency heating furnace is placed in disc brake piston embryo material immersion fuse salt, is nitrogen in intermediate-frequency heating furnace
Atmosphere is enclosed, and temperature controlled processes are as follows: disc brake piston embryo material being heated to 400~500 DEG C in 3~5 hours, heat preservation 2~3 is small
When, disc brake piston embryo material temperature is heated to 1300~1500 DEG C in 4~6 hours later, 1~2 hour is kept the temperature, carries out later
Speed with 5~7 DEG C/minute cools down, until 650~700 DEG C are cooled to, it is isothermal holding 3~5 hours, later that disc brake is living
Plug embryo material is placed in molding die, then by pressing machine with 300~500 MPa pressure compaction 10~20 seconds, will after compacting
Disc brake piston embryo material is put into again in the fuse salt of intermediate-frequency heating furnace, and repeats above-mentioned temperature control variation operation, is finally closed
Intermediate-frequency heating furnace takes out disc brake piston embryo material after furnace cooling, spare；
S5: disc brake piston embryo material is carried out turnery processing using lathe, after sanding and polishing, obtains precise piston embryo by finishing, standby
With；
S6: the cleaning of precise piston embryo is deoiled and is dried in the micro-arc oxidation treatment liquid for being placed on 40~50 DEG C, to essence by surface treatment
The surface of close piston embryo carries out micro-arc oxidation treatment, processing parameter are as follows: micro-arc oxidation treatment liquid 400~450V of operating voltage, place
The reason time 20~40 minutes, after treatment are taken out, and it is small that cleaning, drying is placed on immersion 4~6 in 110~130 DEG C of lubricating oil
When, packaging film sealed package is used after draining excess oil.
Preferably, the heating temperature of thermocouple is 300~330 DEG C in step S2.
Preferably, fuse salt is that sodium phosphate and sodium metasilicate 1:1 in mass ratio are mixed in step S4.
Preferably, micro-arc oxidation treatment liquid is sodium radio-phosphate,P-32 solution that concentration is 25~35% in step S6, and the sodium phosphate is molten
It further include the ammonium molybdate that concentration is 4~8% in liquid.
Technical effect and advantage of the invention:
The present invention passes through metal powder as main material, using powder metallurgical technique, by increasing by two among heat treatment twice
Secondary compacting can make blank internal structure even closer, improve molded part structural strength, guarantee equal performance and quality feelings
Under condition, metal is saved, reduces production cost, by carrying out micro-arc oxidation treatment to surface of shaped parts, increases the anti-of workpiece surface
Oxidisability and wearability, improve product quality, and simple process improves production efficiency.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of disc brake piston powder metallurgical processing moulding process, specific steps are as follows:
S1: stock weighs 200 parts of iron powder according to parts by weight, and 30 parts of copper powder, 10 parts of alumina powder, 4 parts of talcum powder, tungsten-cobalt
20 parts of titanium alloy powder, 2 parts of cadmium sulfide, 1 part of graphite handle iron powder using 250 mesh screen sievings, remaining raw material uses 200
Mesh filter screen sieving processing；
S2: mixing sequentially adds above-mentioned raw materials in blender, and heated by thermocouple to raw material, is mixed equal
Even mixture, it is spare；
S3: mixture is added three times in metallurgical powder molding die by molding, and pressing machine is used after every addition mixed once material
Follow compacting, pressure is 3MPa when pressing, is compressed 3 seconds, until mixture is full of metallurgical powder molding die, later using pressing
Machine obtained disc brake piston embryo material with 300 MPa pressure compaction 10 seconds, spare；
S4: firing, and heats intermediate-frequency heating furnace is placed in disc brake piston embryo material immersion fuse salt, is nitrogen in intermediate-frequency heating furnace
Atmosphere is enclosed, and temperature controlled processes are as follows: disc brake piston embryo material being heated to 400 DEG C in 3 hours, 2 hours are kept the temperature, later 4
Disc brake piston embryo material temperature is heated to 1300 DEG C in hour, 1 hour is kept the temperature, carries out being dropped with 5 DEG C/minute of speed later
Disc brake piston embryo material isothermal holding 3 hours, is placed in molding die, then pass through pressing by temperature later until being cooled to 650 DEG C
Machine was with 300MPa pressure compaction 10 seconds, and after compacting, disc brake piston embryo material is put into again in the fuse salt of intermediate-frequency heating furnace,
And above-mentioned temperature control variation operation is repeated, and intermediate-frequency heating furnace is finally closed, disc brake piston embryo material is taken out after furnace cooling, it is standby
With；
S5: disc brake piston embryo material is carried out turnery processing using lathe, after sanding and polishing, obtains precise piston embryo by finishing, standby
With；
S6: the cleaning of precise piston embryo is deoiled and is dried in the micro-arc oxidation treatment liquid for being placed on 40 DEG C by surface treatment, living to precision
The surface for filling in embryo carries out micro-arc oxidation treatment, processing parameter are as follows: micro-arc oxidation treatment liquid operating voltage 400V, processing time 20 divide
Clock, after treatment are taken out, and cleaning, drying, which is placed in 110 DEG C of lubricating oil, to be impregnated 4 hours, is used after draining excess oil
Packaging film sealed package.
The heating temperature of thermocouple is 300 DEG C in step S2.
Fuse salt is that sodium phosphate and sodium metasilicate 1:1 in mass ratio are mixed in step S4.
Micro-arc oxidation treatment liquid is the sodium radio-phosphate,P-32 solution that concentration is 25% in step S6, further includes in the sodium radio-phosphate,P-32 solution
The ammonium molybdate that concentration is 4%.
Embodiment 2
A kind of disc brake piston powder metallurgical processing moulding process, specific steps are as follows:
S1: stock weighs 250 parts of iron powder according to parts by weight, and 40 parts of copper powder, 14 parts of alumina powder, 7 parts of talcum powder, tungsten-cobalt
25 parts of titanium alloy powder, 4 parts of cadmium sulfide, 3 parts of graphite handle iron powder using 270 mesh screen sievings, remaining raw material uses 200
Mesh filter screen sieving processing；
S2: mixing sequentially adds above-mentioned raw materials in blender, and heated by thermocouple to raw material, is mixed equal
Even mixture, it is spare；
S3: molding uses pressing machine in 4 addition metallurgical powder molding dies of mixture point after every addition mixed once material
Follow compacting, pressure is 4MPa when pressing, is compressed 4 seconds, until mixture is full of metallurgical powder molding die, later using pressing
Machine obtained disc brake piston embryo material with 400 MPa pressure compaction 15 seconds, spare；
S4: firing, and heats intermediate-frequency heating furnace is placed in disc brake piston embryo material immersion fuse salt, is nitrogen in intermediate-frequency heating furnace
Atmosphere is enclosed, and temperature controlled processes are as follows: disc brake piston embryo material being heated to 450 DEG C in 4 hours, keeps the temperature 2.5 hours, Zhi Hou
Disc brake piston embryo material temperature is heated to 1400 DEG C in 5 hours, keeps the temperature 1.5 hours, carries out carrying out with 6 DEG C/minute of speed later
Disc brake piston embryo material isothermal holding 4 hours, is placed in molding die, then pass through pressure by cooling later until being cooled to 680 DEG C
Conjunction machine was with 400 MPa pressure compaction 15 seconds, and after compacting, disc brake piston embryo material is put into the fuse salt of intermediate-frequency heating furnace again
In, and above-mentioned temperature control variation operation is repeated, intermediate-frequency heating furnace is finally closed, disc brake piston embryo material is taken out after furnace cooling,
It is spare；
S5: disc brake piston embryo material is carried out turnery processing using lathe, after sanding and polishing, obtains precise piston embryo by finishing, standby
With；
S6: the cleaning of precise piston embryo is deoiled and is dried in the micro-arc oxidation treatment liquid for being placed on 45 DEG C by surface treatment, living to precision
The surface for filling in embryo carries out micro-arc oxidation treatment, processing parameter are as follows: micro-arc oxidation treatment liquid operating voltage 425V, processing time 30 divide
Clock, after treatment are taken out, and cleaning, drying, which is placed in 120 DEG C of lubricating oil, to be impregnated 5 hours, is used after draining excess oil
Packaging film sealed package.
The heating temperature of thermocouple is 315 DEG C in step S2.
Fuse salt is that sodium phosphate and sodium metasilicate 1:1 in mass ratio are mixed in step S4.
Micro-arc oxidation treatment liquid is the sodium radio-phosphate,P-32 solution that concentration is 30% in step S6, further includes in the sodium radio-phosphate,P-32 solution
The ammonium molybdate that concentration is 6%.
Embodiment 3
A kind of disc brake piston powder metallurgical processing moulding process, specific steps are as follows:
S1: stock weighs 300 parts of iron powder according to parts by weight, and 50 parts of copper powder, 18 parts of alumina powder, 10 parts of talcum powder, tungsten-cobalt
30 parts of titanium alloy powder, 6 parts of cadmium sulfide, 5 parts of graphite handle iron powder using 300 mesh screen sievings, remaining raw material uses 200
Mesh filter screen sieving processing；
S2: mixing sequentially adds above-mentioned raw materials in blender, and heated by thermocouple to raw material, is mixed equal
Even mixture, it is spare；
S3: molding uses pressing machine in 5 addition metallurgical powder molding dies of mixture point after every addition mixed once material
Follow compacting, pressure is 5MPa when pressing, is compressed 5 seconds, until mixture is full of metallurgical powder molding die, later using pressing
Machine obtained disc brake piston embryo material with 500 MPa pressure compaction 20 seconds, spare；
S4: firing, and heats intermediate-frequency heating furnace is placed in disc brake piston embryo material immersion fuse salt, is nitrogen in intermediate-frequency heating furnace
Atmosphere is enclosed, and temperature controlled processes are as follows: disc brake piston embryo material being heated to 500 DEG C in 5 hours, 3 hours are kept the temperature, later 6
Disc brake piston embryo material temperature is heated to 1500 DEG C in hour, 2 hours is kept the temperature, carries out being dropped with 7 DEG C/minute of speed later
Disc brake piston embryo material isothermal holding 5 hours, is placed in molding die, then pass through pressing by temperature later until being cooled to 700 DEG C
Machine was with 500 MPa pressure compaction 20 seconds, and after compacting, disc brake piston embryo material is put into the fuse salt of intermediate-frequency heating furnace again
In, and above-mentioned temperature control variation operation is repeated, intermediate-frequency heating furnace is finally closed, disc brake piston embryo material is taken out after furnace cooling,
It is spare；
S5: disc brake piston embryo material is carried out turnery processing using lathe, after sanding and polishing, obtains precise piston embryo by finishing, standby
With；
S6: the cleaning of precise piston embryo is deoiled and is dried in the micro-arc oxidation treatment liquid for being placed on 50 DEG C by surface treatment, living to precision
The surface for filling in embryo carries out micro-arc oxidation treatment, processing parameter are as follows: micro-arc oxidation treatment liquid operating voltage 450V, processing time 40 divide
Clock, after treatment are taken out, and cleaning, drying, which is placed in 130 DEG C of lubricating oil, to be impregnated 6 hours, is used after draining excess oil
Packaging film sealed package.
The heating temperature of thermocouple is 330 DEG C in step S2.
Fuse salt is that sodium phosphate and sodium metasilicate 1:1 in mass ratio are mixed in step S4.
Micro-arc oxidation treatment liquid is the sodium radio-phosphate,P-32 solution that concentration is 35% in step S6, further includes in the sodium radio-phosphate,P-32 solution
The ammonium molybdate that concentration is 8%.
The present invention passes through metal powder as main material, using powder metallurgical technique, by increasing among heat treatment twice
Add secondary compacting, blank internal structure can be made even closer, improve molded part structural strength, guarantees equal performance and matter
In the case of amount, metal is saved, reduces production cost, by carrying out micro-arc oxidation treatment to surface of shaped parts, increases workpiece surface
Inoxidizability and wearability, improve product quality, simple process, improve production efficiency.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1. a kind of disc brake piston powder metallurgical processing moulding process, it is characterised in that: specific steps are as follows:
S1: stock weighs 200~300 parts of iron powder according to parts by weight, 30~50 parts of copper powder, 10~18 parts of alumina powder, slides
4~10 parts of mountain flour, 20~30 parts of tungsten-cobalt-titanium alloy powder, iron powder is used 250~300 by 2~6 parts of cadmium sulfide, 1~5 part of graphite
Mesh screen sieving processing, remaining raw material are handled using 200 mesh filter screen sievings；
S2: mixing sequentially adds above-mentioned raw materials in blender, and heated by thermocouple to raw material, is mixed equal
Even mixture, it is spare；
S3: molding uses pressing in 3~5 addition metallurgical powder molding dies of mixture point after every addition mixed once material
Machine follows compacting, and pressure is 3~5MPa when pressing, compresses 3~5 seconds, until mixture is full of metallurgical powder molding die, later
Using pressing machine with 300~500 MPa pressure compaction 10~20 seconds, disc brake piston embryo material is obtained, it is spare；
S4: firing, and heats intermediate-frequency heating furnace is placed in disc brake piston embryo material immersion fuse salt, is nitrogen in intermediate-frequency heating furnace
Atmosphere is enclosed, and temperature controlled processes are as follows: disc brake piston embryo material being heated to 400~500 DEG C in 3~5 hours, heat preservation 2~3 is small
When, disc brake piston embryo material temperature is heated to 1300~1500 DEG C in 4~6 hours later, 1~2 hour is kept the temperature, carries out later
Speed with 5~7 DEG C/minute cools down, until 650~700 DEG C are cooled to, it is isothermal holding 3~5 hours, later that disc brake is living
Plug embryo material is placed in molding die, then by pressing machine with 300~500 MPa pressure compaction 10~20 seconds, will after compacting
Disc brake piston embryo material is put into again in the fuse salt of intermediate-frequency heating furnace, and repeats above-mentioned temperature control variation operation, is finally closed
Intermediate-frequency heating furnace takes out disc brake piston embryo material after furnace cooling, spare；
S5: disc brake piston embryo material is carried out turnery processing using lathe, after sanding and polishing, obtains precise piston embryo by finishing, standby
With；
S6: the cleaning of precise piston embryo is deoiled and is dried in the micro-arc oxidation treatment liquid for being placed on 40~50 DEG C, to essence by surface treatment
The surface of close piston embryo carries out micro-arc oxidation treatment, processing parameter are as follows: micro-arc oxidation treatment liquid 400~450V of operating voltage, place
The reason time 20~40 minutes, after treatment are taken out, and it is small that cleaning, drying is placed on immersion 4~6 in 110~130 DEG C of lubricating oil
When, packaging film sealed package is used after draining excess oil.
2. a kind of disc brake piston powder metallurgical processing moulding process according to claim 1, it is characterised in that: in step S2
The heating temperature of thermocouple is 300~330 DEG C.
3. a kind of disc brake piston powder metallurgical processing moulding process according to claim 1, it is characterised in that: in step S4
Fuse salt is that sodium phosphate and sodium metasilicate 1:1 in mass ratio are mixed.
4. a kind of disc brake piston powder metallurgical processing moulding process according to claim 1, it is characterised in that: in step S6
Micro-arc oxidation treatment liquid is the sodium radio-phosphate,P-32 solution that concentration is 25~35%, further include in the sodium radio-phosphate,P-32 solution concentration be 4~8%
Ammonium molybdate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811077482.5A CN109128188A (en) | 2018-09-15 | 2018-09-15 | A kind of disc brake piston powder metallurgical processing moulding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811077482.5A CN109128188A (en) | 2018-09-15 | 2018-09-15 | A kind of disc brake piston powder metallurgical processing moulding process |
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| CN109128188A true CN109128188A (en) | 2019-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110614363A (en) * | 2019-09-02 | 2019-12-27 | 扬州得意模具制造有限公司 | Powder metallurgy forming die processing technology |
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Application publication date: 20190104 |