CN1062486A - Laser radiation sintering method for powder metallurgy products - Google Patents
Laser radiation sintering method for powder metallurgy products Download PDFInfo
- Publication number
- CN1062486A CN1062486A CN 90110104 CN90110104A CN1062486A CN 1062486 A CN1062486 A CN 1062486A CN 90110104 CN90110104 CN 90110104 CN 90110104 A CN90110104 A CN 90110104A CN 1062486 A CN1062486 A CN 1062486A
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- China
- Prior art keywords
- sintering
- bar
- shaped blank
- laser beam
- laser radiation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005245 sintering Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000005855 radiation Effects 0.000 title claims abstract description 9
- 238000004663 powder metallurgy Methods 0.000 title description 4
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 7
- 239000011261 inert gas Substances 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 239000010721 machine oil Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Powder Metallurgy (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a method for sintering powder products by laser radiation, which is characterized in that different pure metal or nonmetal powders are uniformly mixed according to the required proportion, then are pressurized to be made into a rod-shaped blank (4'), and then are sintered by laser beam irradiation and are protected by inert gas. Its advantages are short sintering time, removing harmful phase, high strength and toughness, saving energy and low cost.
Description
Powder metallurgy is emerging engineering in the material subject field, and it is to be raw material with metal or part non-metal powder, makes sintered metal product through batch mixing, shaping and sintering.Adopt powder metallurgic method can make the goods that many other methods can not obtain, machine braking device iron base friction plate like flying, metal dust filter etc.Powder metallurgic method has tangible economic effect, because this goods only need on a small quantity, even not need machining just can use.Therefore the utilization rate of material is very high, and series of advantages such as energy savings, cost are low, cheap are arranged.At present, powder metallurgy has obtained using widely in industrial production.
Will be through batching, shaping and three basic steps of sintering could obtain metallurgical product, sintering is that pressed compact is carried out high-temperature process being lower than under the melting temperature of its main constituent, make pressed compact meet the requirements of intensity and toughness, become available sintered metal product, sintering is a crucial step in the above three process, if sintering process control is improper, can defective tissue occur and cause goods to be scrapped, residual porosity is an important indicator of check goods, hole too much can cause product strength and toughness obviously to descend, and usually porosity is controlled at bottom line in therefore producing.Existing sintering method has coal gas heating, resistance wire heating, and the heating of carbon pipe, the direct resistance heated of pressed compact, eddy-current heating etc. need be incubated at high-temperature very usually for a long time with these heat source sintering goods.Often owing to improper process control produces waste product.
The objective of the invention is to overcome the above-mentioned shortcoming of existing technology for sintering powder metallurgical product, providing a kind of is thermal source with the laser beam, the new method of efficient, high-quality sinter powder metal goods.
Above-mentioned purpose of the present invention can be achieved through the following technical solutions: promptly a kind of technology for sintering powder metallurgical product by laser radiation; its special character is can be earlier after different simple metal or the even mixing of non-metal powder ratio on request; be pressed into bar-shaped blank (4 ') by adding, adopt laser beam (6) irradiation sintering then and adopt the inert gas protection.
More than saidly be pressed in the plastic tube (4) of packing into after bar-shaped blank (4 ') can evenly mix different simple metal or non-metal powder ratio on request by adding, its two ends heated sealant, then plastic tube (4) is placed in the oil cylinder (5) that machine oil (3) are housed, packing into piston (1) in the oil cylinder (5) and it is added is pressed into bar-shaped blank (4 ').
More than said employing laser beam (6) irradiation sintering and adopt gas shield to be put into bar-shaped blank (4 ') on the base (10); use laser beam (6) to be radiated at bar-shaped blank (4 ') then and go up sintering by speculum (7), focus lamp (8); in the process of sintering, blow protection gas to bar-shaped blank (4 ') by nozzle (9).
By the present invention, sintered metal product obtains in following program: at first different simple metal/non-metal powders ratio on request is mixed into powder, tens seconds even mixed-powder are pressed into blank, this blank are placed on sintering under the laser beam, as long as just can sinter goods into.Can adopt gas shield during sintering, as nitrogen.
Description of drawings:
Fig. 1 is construction of pressure vessel figure;
Fig. 2 is laser sintering process figure;
(1) is piston among the figure; (5) be oil cylinder; (2) be the sealing ring of piston and oil cylinder cooperation place; (3) be in-oil cylinder machine oil; (4) be plastic tube, powder metallurgy is housed in it; (6) be laser beam from laser instrument; (7) be speculum, its incidence angle receives laser beam, and the laser beam that reflects by its angle of reflection focuses on by focus lamp (8) again, and directive is placed on the bar-shaped blank (4 ') on the base (10), (9) be nozzle, for bar-shaped blank (4 ') provides inert gas.
Characteristics of the present invention and advantage: laser beam and blank interact and can make material obtain utmost point high heat in the short time at the utmost point, and with very fast speed cooling, make sintering just obtain in the short time implementing at the utmost point, these characteristics can make element dissolve each other fully with to remove some mutually harmful. In addition, laser beam can also be certain to material production in heating material surge and plasma effect. These effects can significantly increase the mutual dissolving between the metallic particles, make the powder in the product material become the metallurgical binding state, greatly reduce the porosity of product material, increase intensity and the toughness of material. Meanwhile go back energy savings, reduce production costs.
The concrete enforcement of this method is described with following Example.Be mixed with various mixed-powders in ratio shown in the table one.
Table one sintered metal product composition
Is the composite material external diameter of packing into 3mm, in the plastic tube of wall thickness 0.3mm, plastic tube length 150mm, plastic tube two ends heat fused is shut, then this plastic tube (4) is placed in the oil cylinder (5) that machine oil (3) are housed, fuel head is greater than 150mm, the effect of sealing ring (2) is oil sealing and improves in-cylinder pressure, the piston oil cylinder of packing into, this device is placed on the testing of materials machine base, by the testing machine pressure head piston (1) upper surface is pressurized to 30Kg/mm
2, plastic tube is taken out in unloading back, and this moment, the powder in tube material was compacted that to have become diameter be the bar-shaped blank of 2.3mm, and this bar-shaped blank was just obtained sintered metal product in 20 seconds at the laser beam sintering.Laser beam (6) is by standard 500W, CO
2The quasi-sealed-off laser instrument produces, and laser beam (6) is by 45 ° of speculums (7) and the bar-shaped blank of focus lamp (8) radiation (4 '), and the power that uses during radiation is 450W, the diameter 25mm of bundle class.Bar-shaped blank (4 ') is placed on the base (10), sprays inert gas with nozzle (9) to bar-shaped blank (4 ') during sintering.Through optics and electric microscopic examination, its porosity is littler 2 times than existing goods.Knot between the powder has combined light into metallurgical binding, has second to separate out (second is the product of separating out after different simple metal dissolve each other mutually) mutually at intracell.During this explanation laser emission sintering element having taken place dissolves each other.Through measuring, the conventional goods of its strength ratio improve 3 times.
Claims (3)
1, a kind of technology for sintering powder metallurgical product by laser radiation; it is characterized in that earlier after different simple metal or the even mixing of non-metal powder ratio on request; be pressed into bar-shaped blank (4 ') by adding, adopt laser beam (6) irradiation sintering then and adopt the inert gas protection.
2, a kind of technology for sintering powder metallurgical product by laser radiation according to claim 1, it is characterized in that said to be pressed into bar-shaped blank (4 ') be to pack into after different simple metal or non-metal powder ratio are on request evenly mixed in the plastic tube (4) by adding, its two ends heated sealant, then plastic tube (4) is placed in the oil cylinder (5) that machine oil (3) are housed, packing into piston (1) in the oil cylinder (5) and it is added is pressed into bar-shaped blank (4 ').
3, a kind of technology for sintering powder metallurgical product by laser radiation according to claim 1 and 2; it is characterized in that said employing laser beam (6) irradiation sintering and adopting gas shield is that bar-shaped blank (4 ') is put on the base (10); use laser beam (6) to be radiated at bar-shaped blank (4 ') then and go up sintering by speculum (7), focus lamp (8); in the process of sintering, blow protection gas to bar-shaped blank (4 ') by nozzle (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110104 CN1062486A (en) | 1990-12-20 | 1990-12-20 | Laser radiation sintering method for powder metallurgy products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110104 CN1062486A (en) | 1990-12-20 | 1990-12-20 | Laser radiation sintering method for powder metallurgy products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1062486A true CN1062486A (en) | 1992-07-08 |
Family
ID=4881768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90110104 Pending CN1062486A (en) | 1990-12-20 | 1990-12-20 | Laser radiation sintering method for powder metallurgy products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062486A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406168C (en) * | 2003-02-26 | 2008-07-30 | 3D-微马克股份公司 | Method and device for producing miniature bodies or microstructured bodies |
| CN104736483A (en) * | 2012-10-29 | 2015-06-24 | 阿尔法金属公司 | Sintering powder |
| CN108115933A (en) * | 2017-12-20 | 2018-06-05 | 北京卫星环境工程研究所 | Particulate matter forming method based on light radiation fusion technology |
-
1990
- 1990-12-20 CN CN 90110104 patent/CN1062486A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406168C (en) * | 2003-02-26 | 2008-07-30 | 3D-微马克股份公司 | Method and device for producing miniature bodies or microstructured bodies |
| CN104736483A (en) * | 2012-10-29 | 2015-06-24 | 阿尔法金属公司 | Sintering powder |
| CN108115933A (en) * | 2017-12-20 | 2018-06-05 | 北京卫星环境工程研究所 | Particulate matter forming method based on light radiation fusion technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |