CN1051489C - Manufacture of porous materials by powder metallurgy - Google Patents
Manufacture of porous materials by powder metallurgy Download PDFInfo
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- CN1051489C CN1051489C CN93121182A CN93121182A CN1051489C CN 1051489 C CN1051489 C CN 1051489C CN 93121182 A CN93121182 A CN 93121182A CN 93121182 A CN93121182 A CN 93121182A CN 1051489 C CN1051489 C CN 1051489C
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- powder metallurgy
- porous materials
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Abstract
The present invention discloses a manufacture technology of porous materials by powder metallurgy, which comprises the procedures, such as the mixing of prepared materials, forming by pressing, sintering, cutting, etc. The present invention overcomes the defect that the porous materials manufactured by the prior art have few through holes, tortuous hole channels, hole distribution without being designed according to requirements, etc. The present invention is characterized in that (1) the present invention has simple technology and no pollution; (2) the porous materials which are manufactured by powder metallurgy according to the technology have many through holes, flat and straight hole channels, reasonable distribution according to requirements, etc. The porous materials which are manufactured by powder metallurgy according to the technology can be used for manufacturing elements, such as separators, filters, flow guiders, flow limiters, dampers, etc.
Description
The present invention relates to a kind of powdered metallurgical material manufacturing process, particularly manufacture of porous materials by powder metallurgy.
At present, the technology of the metallurgical porous material that makes powder has two kinds, first metal or alloy powder loose sintering; It two is that the metal or alloy powder is mixed with pore creating material, compression moulding, sintering then.See that Baoji non-ferrous metal research institute writes " powder metallurgy porous material " metallurgical industry publishing house, the first volume, 1978.He Fengjia, to beautiful jade, sintering filtering material serviceability and powder size and sintering process relation, " PM technique ", 1989 (2), 35-38 etc.Aforementioned technology is made the porous material of gained, and its hole is a random distribution.This is at random because of pore creating material mixes residing position, back with alloy powder.This pore creating material is heated volatilization and the hole that forms also is at random.As shown in Figure 1.The hole of these random distribution has plenty of closed pore, as 2.1 in the accompanying drawing 2.Though the hole that has more deeply but be not commonly referred to as half through hole, as 2.2 in the accompanying drawing 2.For the material that specification requirement is permeability, have only through hole just useful, as 2.3 in the accompanying drawing 2.In above-mentioned three kinds of closed pores, half through hole and through hole, and through hole proportion in the porous material of making gained with aforementioned technology is less, and duct complications, changes of section are big, hole wall is coarse and the arranging, move towards to be difficult to design as required of hole.In research practice and production practices, need through hole many in addition all Kong Jun be that through hole, duct can be as required and the manufacture of porous materials of characteristics such as design is exactly the problem that needs solve.
The object of the present invention is to provide a kind of technology that can produce powder metallurgy porous material with characteristics such as through hole are many, the duct can be controlled, hole wall is smooth.
The present invention is realized by following measures: manufacture of porous materials by powder metallurgy, at first carry out the mixing of raw material, and be about to the metal or alloy powder and mix with additive; Secondly with aforesaid compound base.Be about to the compound die mould of packing into, meanwhile, plant the hole material in compound, use forcing press compression moulding according to pore-creating design needs; To become the powdered metallurgical material of base to insert sintering furnace once more and carry out sintering; The 4th step was to cut, and this operation is to reveal for the opening of the channel that makes powder metallurgy porous material.The principle that this technical process can make powdered metallurgical material form porous is; Place the pore-creating material in the pressed compact when sintering, to be molten condition.Because unidirectional a large amount of diffusions that the diffusion of capillary force and atom, pore-creating material take place in matrix material powder gap and powder are flowed, so that the pore-creating material all moves away the formation duct from original position.According to actual needs, can design with regard to the density in hole, arrangement, size etc.
The present invention has compared following beneficial effect with prior art: (1) technical process reduces or is pollution-free.In the prior art, its pore-creating material is heated to volatilize and burns and contaminated environment; (2) powder metallurgy porous material that utilizes this technology to make has through hole many, and the duct is straight, and changes of section is little, and hole wall is more smooth, is beneficial to the characteristics that form laminar flow; (3) material that utilizes this technology to make, its hole can be designed arbitrarily.As required, what, the size, density, distribution in hole all can be controlled, and have overcome the deficiency of the random distribution in the prior art.The powder metallurgy porous material that makes with this technology can be used for making elements such as separation, filtration, water conservancy diversion, current limliting, damping.
Description of drawings
Accompanying drawing 1 is a porous material structural representation in the prior art;
Accompanying drawing 2 is porous material closed pore 2.1, half through hole 2.2, through hole 2.3 schematic diagrames in the prior art.
Accompanying drawing 3 is these process charts.
Now 3 the invention will be further elaborated in conjunction with the accompanying drawings:
1, raw material:
(1)-100% order FJ316 stainless steel powder～+ 200:
(2) use all size brass stainless steel cloth as the pore-creating material;
(3) additive is a zinc stearate.
2, raw material mixes and compression moulding:
(1) stainless steel powder is crossed 80 mesh sieves, sieve removes big grain agglomerate impurity;
(2) zinc stearate is crossed 80 mesh sieves, sieve removes agglomerate;
(3) weighing stainless steel powder and zinc stearate, its ratio are 99.2: 0.8;
(4) stainless steel powder and zinc stearate are packed into blender is puddled, and blender changes to build and is n=46.7 rev/min, puddles 35 minutes;
(5) press type volume and cloth hole design takes by weighing mixed powder;
(6) powder is packed into die mould is implanted the pore-creating copper wire according to the design needs in hole simultaneously;
(7) repeat (5), (6) operation;
(8) (6) gained is placed the pressurization of 600KN forcing press, pressure is 70～75KN/cm
2The pressed compact averag density is 6.3～6.4 gram/cm
3
3, sintering:
Use tunneled sintering kiln, pressed compact is carried out sintering.In sintering process, use hydrogen to make protection atmosphere.Sintering schedule is 700 ℃ of preheatings 10 minutes; Sintering is 30～60 minutes under 1100～1200 ℃ of conditions.
4, cutting:
Utilize TYe120BOFIL2000 line cutting mill, cut stub bar, the hole is revealed.By above-mentioned technical process, can make powder metallurgy porous material.
Claims (3)
1, a kind of manufacture of porous materials by powder metallurgy, comprise operations such as mixing is got the raw materials ready, compression moulding, sintering, line cutting, cleaning, alloy powder and additive desired proportions are mixed stirring in blender, it is characterized in that in the compression moulding operation, material after puddling places die mould, meanwhile designs needs with in the compound in the pore-creating material implantation die mould, afterwards according to the cloth hole, at the press pressure compacted under, obtain the powder metallurgy porous material that needs at last.
2, manufacture of porous materials by powder metallurgy according to claim 1 is characterized in that the pore-creating material is the wire that the melting temperature of material is lower than matrix powder material melting point temperature.
3, manufacture of porous materials by powder metallurgy according to claim 1 is characterized in that additive is zinc stearate or calcium stearate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121182A CN1051489C (en) | 1993-12-29 | 1993-12-29 | Manufacture of porous materials by powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121182A CN1051489C (en) | 1993-12-29 | 1993-12-29 | Manufacture of porous materials by powder metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1104569A CN1104569A (en) | 1995-07-05 |
| CN1051489C true CN1051489C (en) | 2000-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93121182A Expired - Fee Related CN1051489C (en) | 1993-12-29 | 1993-12-29 | Manufacture of porous materials by powder metallurgy |
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| Country | Link |
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| CN (1) | CN1051489C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434216C (en) * | 2007-03-20 | 2008-11-19 | 贵州永红航空机械有限责任公司 | Machining process of wearable sealing part of nickel-base sintered material |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10224671C1 (en) * | 2002-06-03 | 2003-10-16 | Forschungszentrum Juelich Gmbh | Making high porosity sintered moldings, mixes metal powder with place holder, presses and processes blank, then removes place holder before sintering |
| CN1299797C (en) * | 2004-12-31 | 2007-02-14 | 华南理工大学 | Porous inorganic microstraining core and preparation method thereof |
| CN102380615A (en) * | 2011-10-16 | 2012-03-21 | 枣庄市润源粉末冶金有限公司 | Powder metallurgy start chainwheel and gear |
| CN114505480A (en) * | 2020-11-16 | 2022-05-17 | 鞍钢股份有限公司 | Method for preparing foam steel |
| CN115475942A (en) * | 2022-09-26 | 2022-12-16 | 安泰环境工程技术有限公司 | Porous titanium plate and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4828785A (en) * | 1986-01-27 | 1989-05-09 | Lanxide Technology Company, Lp | Inverse shape replication method of making ceramic composite articles |
-
1993
- 1993-12-29 CN CN93121182A patent/CN1051489C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4828785A (en) * | 1986-01-27 | 1989-05-09 | Lanxide Technology Company, Lp | Inverse shape replication method of making ceramic composite articles |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434216C (en) * | 2007-03-20 | 2008-11-19 | 贵州永红航空机械有限责任公司 | Machining process of wearable sealing part of nickel-base sintered material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1104569A (en) | 1995-07-05 |
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