CN1102608A - Method for mfg. of compound products by using powder metallurgy - Google Patents
Method for mfg. of compound products by using powder metallurgy Download PDFInfo
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- CN1102608A CN1102608A CN 94115469 CN94115469A CN1102608A CN 1102608 A CN1102608 A CN 1102608A CN 94115469 CN94115469 CN 94115469 CN 94115469 A CN94115469 A CN 94115469A CN 1102608 A CN1102608 A CN 1102608A
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- taper
- powder
- pressing die
- compacting
- mould
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Abstract
The powder metallurgical process for manufacturing high-compression and load-composite workpiece is aimed at making powder-sintered clad on internal and external surfaces of shaped part through filling powder material, compacting and sinter. It features that metallic powder material is filled between basic part and conic press mould with central conic structure and alpha angle between conic working surface and central line of mould; pressing force is applied to end face of part; and pressing and demoulding are simultaneously performed.
Description
The invention belongs to by metal dust being carried out compacting, sintering manufacturing and comprise the composite article of this powder.
The preparation method of existing composite article has technology such as spraying, built-up welding, the processing of bimetallic plates stamping-out, double layer of powder compacting.Spraying or built-up welding all are the outer surface covering layer of metal layers at original part, can improve the performance of original part material, but its weak point are that process conditions and coating quality are restive, and auxiliary material consumption is many, only is fit to single-piece or partial operation.Stamping-out processing is to adopt the bimetallic plates punch forming, and as bi-metal shaft bushing, DU bearing, DP bearing, its weak point is that production process is many, technological requirement is high, so waste of raw materials is big, production cost is high.Patent of invention CN1056832A, CN1061367A are disclosed to be the manufacture craft of iron, copper powder metallurgy composite article, adopts copper powder and iron powder to load at interval, vertical compression moulding, and pressure, resintering are made finished product again again behind the sintering.But its technology is because of sintering temperature is controlled at 880 ℃ of following low-temperature sinterings, and making with iron is that the product strength of skeleton is lower, and is prone to the infiltration phenomenon during sintering, makes part and is only applicable to the less part of crushing strength, as the mechanical lining of little load.
The purpose of this invention is to provide a kind of method of making composite article, covering metal level on the matrix of former base material, can keep the intensity of former base material, can reduce operation again, cut down finished cost.
The present invention is achieved in that the method that adopts metal dust to make composite article promptly at the inner surface of forming part or the outer surface sintering coating that makes powder, and concrete steps comprise loads powder, compacting and sintering, it is characterized in that:
A. taper pressing die (1) middle part be a pyramidal structure, and the upper and lower part still be a vertical plane, in the middle part of mould, increase gradually or dwindle, and formation taper work face, the center line of taper work face and mould is angle α;
B. the metal dust compound is filled between the slit of taper pressing die (1) and part base solid (3) formation;
C. press power P is added on the end face of part base solid (3);
D. the compacting and the demoulding are carried out simultaneously.
Taper work face conicity angles alpha in the taper pressing die (1) is 1～10 °, best results in the time of 2～7 °.
The present invention has compared following beneficial effect with background technology.
1. compare with the manufacture craft of double layer of powder compacting, because can select for use the material of higher-strength or the pulverulent product of tight burning to make the skeleton matrix, so be suitable for processing the part of high crushing strength, load-bearing heavy load.
2. the taper pressing die is simple in structure, and is convenient and practical, can realize continued operation, the productivity ratio height.
3. the scope of application is wide.The cylindrical surface that obtains powder sintered layer can be that inner surface, outer surface or the surfaces externally and internally of matrix obtains coating simultaneously.End surface shape is not limited to circle, can be other shape.
4. powder sintered layer can be selected according to instructions for use, has various difference in functionalitys such as antifriction, wear-resisting, anticorrosion anti-corrosion, porous.Coating can be a mixed layer, and repetitive operation can be produced the three-layer composite structure goods.
5. sintering warpage is little, the precision height, and surface state is good, and therefore back processing is few, the stock utilization height.
6. the present invention can select coating thickness 0.2～3mm according to function of use, and resulting product has saves precious materials more than 70%, and remarkable advantage more than 25% reduces production costs.
7. compare with built-up welding, spraying, bimetallic plates stamping-out processing technology have operation few, be fit to that batch process, efficient height, product quality are controlled easily, auxiliary material consumption less, take the few obvious advantage of machine tool.
Fig. 1 is an inner surface shaping taper pressing die
Fig. 2 is an outer surface shaping taper pressing die
Fig. 3 is an inner surface moulding compacting behaviour in service structural representation
Fig. 4 is an outer surface moulding compacting behaviour in service structural representation
Fig. 5 is inner surface formation of parts goods
Fig. 6 is outer surface forming part goods
1-taper pressing die among the figure
2-powder coating
The 3-part base solid
H
1-dress powder district height
H
2-compacting workspace height
H
3-sizing area height
H
4-demoulding district height
D
1Mould footpath ,-dress powder district
D
2-sizing area mould footpath
D
3Mould footpath ,-demoulding district
α-taper work face taper angle
D
0-part base solid diameter (D during the inner surface moulding
0Be goods matrix internal diameter, D during the outer surface moulding
0Be goods matrix external diameter)
H
0-part base solid height
The P-press power and the goods direction of motion
Major parameter relation and selection:
（H
2+H
3）＜H
1=H
0＜H
4
D during the inner surface moulding
0＞D
2＞D
1, D
2＞D
3
D during the outer surface moulding
0＜D
2＜D
1, D
2＜D
3
Coating thickness:
During the inner surface moulding D
0-D
2
During the outer surface moulding D
2-D
0
The dress powder layer thickness:
D during the inner surface moulding
0-D
1≈ K(D
0-D
2)
D during the outer surface moulding
1-D
0≈ K(D
2-D
0)
K is the powders compression ratio, and is relevant with material behavior.
Be described further below in conjunction with embodiment
Embodiment 1:
Part name: mechanical sliding bearing
Accessory size: φ 58 * φ 43.8 * H38mm
End surface shape: circle
Function of use: antifriction
Matrix material: 20# steel
Clad material: atomized tin bronze powder+graphite
Coating position: inner surface
Coating thickness: 0.5mm
Work conicity angles alpha: 2 °
Matrix surface is handled: the car fine thread
Sintering temperature: 810 ℃
Sintering atmosphere: cracked ammonium
The multiple pressure and resintering: conical die, 810 ℃
Machined: chamfering, car oil groove
Cover performance: density 8.0g/cm
3, hardness HB 58～62
Save copper product: 94%
Embodiment 2:
Part name: die-punch
Accessory size: 25 * 30 * H40mm
End surface shape: rectangle
Require the part performance: wear-resisting
Matrix material: 45# steel
Clad material: steel-bonded cemented carbide powder
Coating position: outer surface
Coating thickness: 1.5mm
Work conicity angles alpha: 4.5 °
Matrix surface: mechanical rough turn condition
Sintering temperature: 1280 ℃
Sintering atmosphere: vacuum
Machined: grinding (reaching precision)
Cover performance: density 6.5g/cm
3, after hardness HRC68～73(quenches)
Save Hardmetal materials: 78%
Claims (3)
1, a kind ofly make the method for composite article with metal dust, at the inner surface of forming part or the outer surface sintering coating that makes powder, concrete steps comprise loads powder, compacting and sintering, it is characterized in that:
A. taper pressing die (1) middle part is a pyramidal structure, and the upper and lower part still is a vertical plane, increases gradually or dwindle at the mould middle part to form the taper work face, and the center line of taper work face and mould is angle α;
B. the metal dust compound is filled between the slit of taper pressing die (1) and part base solid (3) formation;
C. press power P is added on the end face of part base solid (3);
D. the compacting and the demoulding are carried out simultaneously.
2, method according to claim 1, the angle α that it is characterized in that taper pressing die (1) is 1～10 °.
3, method according to claim 1, the best when the angle α that it is characterized in that taper pressing die (1) is 2～7 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115469A CN1034854C (en) | 1994-08-31 | 1994-08-31 | Method for mfg. of compound products by using powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115469A CN1034854C (en) | 1994-08-31 | 1994-08-31 | Method for mfg. of compound products by using powder metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1102608A true CN1102608A (en) | 1995-05-17 |
| CN1034854C CN1034854C (en) | 1997-05-14 |
Family
ID=5037507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94115469A Expired - Fee Related CN1034854C (en) | 1994-08-31 | 1994-08-31 | Method for mfg. of compound products by using powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1034854C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406169C (en) * | 2002-07-23 | 2008-07-30 | 南加利福尼亚大学 | Metallic parts fabrication using selective inhibition of sintering (SIS) |
| CN102211172A (en) * | 2011-05-25 | 2011-10-12 | 北京交通大学 | Mold and method for manufacturing bimetal composite sliding bearing |
| CN102974830A (en) * | 2012-11-22 | 2013-03-20 | 宁波得利时泵业有限公司 | Preparation method for pump body structure of cam rotor pump |
| CN102996441A (en) * | 2012-11-22 | 2013-03-27 | 宁波得利时泵业有限公司 | Pump body structure of cam rotor pump and preparation method thereof |
| CN105312576A (en) * | 2014-06-26 | 2016-02-10 | 株式会社电装 | Method of manufacturing sintering diffusion joining member and manufacturing apparatus of the same |
| CN106694889A (en) * | 2017-01-17 | 2017-05-24 | 苏州艾盾合金材料有限公司 | Inner liner with composite alloy layer and preparation method of inner liner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762191B2 (en) * | 1990-11-29 | 1995-07-05 | 大同メタル工業株式会社 | Sliding member having sintered copper alloy layer |
-
1994
- 1994-08-31 CN CN94115469A patent/CN1034854C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406169C (en) * | 2002-07-23 | 2008-07-30 | 南加利福尼亚大学 | Metallic parts fabrication using selective inhibition of sintering (SIS) |
| CN102211172A (en) * | 2011-05-25 | 2011-10-12 | 北京交通大学 | Mold and method for manufacturing bimetal composite sliding bearing |
| CN102211172B (en) * | 2011-05-25 | 2013-01-23 | 北京交通大学 | Mold and method for manufacturing bimetal composite sliding bearing |
| CN102974830A (en) * | 2012-11-22 | 2013-03-20 | 宁波得利时泵业有限公司 | Preparation method for pump body structure of cam rotor pump |
| CN102996441A (en) * | 2012-11-22 | 2013-03-27 | 宁波得利时泵业有限公司 | Pump body structure of cam rotor pump and preparation method thereof |
| CN105312576A (en) * | 2014-06-26 | 2016-02-10 | 株式会社电装 | Method of manufacturing sintering diffusion joining member and manufacturing apparatus of the same |
| CN106694889A (en) * | 2017-01-17 | 2017-05-24 | 苏州艾盾合金材料有限公司 | Inner liner with composite alloy layer and preparation method of inner liner |
| CN106694889B (en) * | 2017-01-17 | 2018-10-09 | 苏州艾盾合金材料有限公司 | A kind of neck bush and preparation method thereof with composite alloy layer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1034854C (en) | 1997-05-14 |
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