CN1062486A - Technology for sintering powder metallurgical product by laser radiation - Google Patents
Technology for sintering powder metallurgical product by laser radiation Download PDFInfo
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- 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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- sintering
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- shaped blank
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Abstract
The present invention relates to a kind of laser emission sintered powder article process; be characterized in 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 irradiation sintering then and adopt inert gas shielding.Its outstanding advantage is that the time compole of sintering is short, can remove some harmful phase, increases the intensity and the toughness of material, and energy savings reduces production costs.
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 | Technology for sintering powder metallurgical product by laser radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110104 CN1062486A (en) | 1990-12-20 | 1990-12-20 | Technology for sintering powder metallurgical product by laser radiation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1062486A true CN1062486A (en) | 1992-07-08 |
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ID=4881768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90110104 Pending CN1062486A (en) | 1990-12-20 | 1990-12-20 | Technology for sintering powder metallurgical product by laser radiation |
Country Status (1)
| Country | Link |
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| 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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