CN102549184A - Graphite body impregnated with a light metal alloy - Google Patents
Graphite body impregnated with a light metal alloy Download PDFInfo
- Publication number
- CN102549184A CN102549184A CN2010800440641A CN201080044064A CN102549184A CN 102549184 A CN102549184 A CN 102549184A CN 2010800440641 A CN2010800440641 A CN 2010800440641A CN 201080044064 A CN201080044064 A CN 201080044064A CN 102549184 A CN102549184 A CN 102549184A
- Authority
- CN
- China
- Prior art keywords
- quality
- graphite
- duraluminum
- graphite body
- copper
- Prior art date
- 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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
Abstract
The invention relates to a graphite body impregnated with a light metal alloy, said body containing 10 to 20% by volume of an aluminum alloy having a content of 5 to 9.9% by mass silicon, 0.05 to 5.0% by mass copper, 0.5 to 1.5% by mass iron, 0.25 to 1.0% by mass manganese, 0.10 to 1.5% by mass zinc, and 0.05 to 0.35% by mass titanium in a matrix made of graphite particles having a mean particle size in the range of 3 to 20 [mu]m, and a density of 2.00 to 2.3 g/cm3, flexural strength of 120 to 160 N/mm2, pressure resistance of 250 to 330 N/mm2, a modulus of elasticity of 10.0 x 103 to 40 x 103 N/mm3 and thermal conductivity of 70 to 140 W/mK. The invention further relates to a method for producing such a graphite body and to the use thereof as an electrode for the discharge machining of metal parts.
Description
The present invention relates to a kind of graphite body with the light metal alloy dipping.The invention still further relates to the method that is used to prepare this graphite body and as the application of the electrode of metal parts electrodischarge machining(E.D.M.).
Described electric spark ablation processing or electrodischarge machining(E.D.M.) (electrical discharge machining EDM) are the established methodologies that in workpiece and mould manufacturing, is used in workpiece inset and mold insert, producing cavity.Then specifically, when the high tolerance of needs, great surface quality and filigree shape (filigrane Geometrien) or in the time must having the mold insert of high firmness, make in this way.
Typical use field is the mould manufacturing that is used for injection-moulded plastic part, and said injection-moulded plastic part for example also has electronics such as mobile telephone, televisor in automotive industry, in toy industry or packing are produced, uses.
In order to produce aluminium moulding and pressure die casting part also by the electric spark ablation mfg. moulding die.
Yet, compare with the hard milling of the direct method of mould manufacturing, when electrodischarge machining(E.D.M.) (EDM), must prepare electrode.Electrode is processed by copper or graphite usually.Owing to graphite is not affected (not having distortion) because of heat effect during ablate processing or Milling Process, so trend is obviously tended to graphite.
Basically divide into rough etch and close etching.The electrode that becomes for copper only possibly use copper electrolyte.Electrode for graphite is processed can be optimized described technology because can be used for slightly degrading, general degrade and the smart graphite that degrades between select.Corresponding graphite is waited the static pressure compacting usually, uses the fine granularity between 1-15 μ m here.How many materials the user can according to losing by mould at short notice, and selects to be particularly suitable for the graphite grade of rough etch for this reason.When if purpose is the great surface quality that is implemented under the strictest tolerance situation, for this purpose use is used for the graphite grade of so-called " close etching ".
Particularly, described rough etch also is used in forging industry.
Here graphite and milling direct competitive firmly.Described mould possibly be huge (bent axle, drag link, steering knuckle etc.), therefore also can be fully not the bypass electrode manufacturing but through hard milling with direct method production.
As describe already, also exist to have the graphite grade that is used for close etching than small grain size.Also for the material that is difficult to ablate such as hard metal, ampcoloy (Ampcoloy), high-strength alloy beryllium copper (Mouldmax), Inconel(nickel alloys) (Inconel) and the titanium alloy of entire area, graphite is flooded with copper here.
The electric spark ablation machining principle is following:
Electrode materials and workpiece are so put into Working position, make the two not contact each other.Keep having the gap, it is filled with the insulating liquid dielectric medium.Now, leading to electric current (electrode is anodal usually) on workpiece and the electrode.If at this moment described gap is very little, the spark of then setting out out.People are referred to as " discharge ".Pass through the heat that generated, evaporation of metal and stay pit.At this moment continuous discharge produce many pits so naturally, and material meanwhile is damaged.Whole discharge process obviously complicated many and also exist many influence factors such as pulse duration, quiescent interval, strength of current, voltage, stacking factor, the final surface (
) that will reach or the like.
Become known for the electrode materials of metal parts electrodischarge machining(E.D.M.) by document JP 2004-209610, it is made up of carbon composite, and this carbon composite comprises and has at least 10% or the duraluminum of more silicone contents.In order to realize that fusing point reduces and to reduce infiltrating temperature, in the duraluminum 10% and more silicone content be considered to necessary.In addition, aluminium carbide (Al
4C
3) formation be useful.
The object of the present invention is to provide a kind of graphite body, it floods with duraluminum, silicone content be lower than 10% and its be suitable as the electrode of metal parts electrodischarge machining(E.D.M.).The invention still further relates to the method that is used to prepare this graphite body.
Solve through a kind of graphite body according to purpose of the present invention, it comprises the duraluminum of 10～20 volume % and has 2.00～2.3g/cm in by the molecular matrix of the granular graphite of median size in 3～20 mu m ranges
3Density, 120～160N/mm
2Bending strength, 250～330N/mm
2Ultimate compression strength, 10.0 * 10
3～40 * 10
3N/mm
3Young's modulus and 70～140W/mK like the thermal conductivity of 70～100W/mK, said duraluminum contains the silicon of 5～9.9 quality %, the copper of 0.05～5.0 quality %, the iron of 0.5～1.5 quality %, the manganese of 0.25～1.0 quality %, the zinc of 0.10～1.5 quality % and the titanium of 0.05～0.35 quality %.
Other advantageous embodiment of the present invention are embodied in the claim 2 to 7.
The present invention will further illustrate as follows.
Embodiment 1
Graphite body is d by size-grade distribution
50The synthetic graphite of=10 μ m and tackiness agent through etc. static pressure compacting process with subsequently carbonization and the greying under the non-oxidizable condition.With the dipping of light metal alloy through the graphite blank is preheated to workpiece temperature with matched coefficients of thermal expansion, and inject and carry out through being molded into the inner alloy of carbon body of treating infiltration.Temperature described herein should be chosen as melt temperature+5 ℃ that are equivalent to employed alloy.Internal pressure specific in the mould is＞1500bar.It is confirmed according to the size shown in the following table:
| Diameter [mm]/highly [mm] | Pressure [bar] |
| 100x100 | ＜2000 |
| 200x200 | ＞2000 |
| 300x300 | ＞2300 |
| 400x400 | ＞3000 |
Time length depends primarily on material property such as the porosity and the pore shape of the graphite that uses.Steeping process carries out under shielding gas owing to possible oxidizing reaction (melting loss, carbide forms), until realizing solidifying in the hole of light metal alloy at graphite body through cooling.
Claims (7)
1. with the graphite body of light metal alloy dipping, it is characterized in that it comprises the duraluminum of 10～20 volume % and have 2.00～2.3g/cm in by the molecular matrix of the granular graphite of median size in 3～20 mu m ranges
3Density, 120～160N/mm
2Bending strength, 250～330N/mm
2Ultimate compression strength, 10.0 * 10
3～40 * 10
3N/mm
3Young's modulus and the thermal conductivity of 70～140W/mK, said duraluminum contains the silicon of 5～9.9 quality %, the copper of 0.05～5.0 quality %, the iron of 0.5～1.5 quality %, the manganese of 0.25～1.0 quality %, the zinc of 0.10～1.5 quality % and the titanium of 0.05～0.35 quality %.
2. according to the graphite body of claim 1, it is characterized in that it comprises the duraluminum of tin of the plumbous and the highest 0.40 quality % of the magnesium with the highest 0.50 quality %, the chromium of the highest 0.20 quality %, the nickel of the highest 0.70 quality %, the highest 0.50 quality %.
3. according to the graphite body of claim 1 or 2, it is characterized in that it comprises duraluminum; Said duraluminum contains the silicon of 7.0～9.5 quality %, the copper of 3.0～3.5 quality %, the iron of 1.2 quality %; 0.1 the manganese of～0.5 quality %, the zinc of 1.2 quality %, the titanium of 0.15 quality %; 0.10 the magnesium of～0.5 quality %, the tin of the plumbous and 0.10 quality % of 0.20 quality %.
4. be used to prepare the method according to the graphite body of claim 1 to 3, it is characterized in that, the graphite that waits the static pressure compacting is flooded with duraluminum, wherein using density is 1.75～1.80g/cm
3, bending strength is 40～60N/mm
2, ultimate compression strength is 100～130N/mm
2, Young's modulus is 9.0 * 10
3～12 * 10
3N/mm
3, thermal conductivity is that 70～100W/mK and open-cell porosity are the graphite of 10%～20 volume % and the silicon that contains 5～9.9 quality %, the copper of 0.05～5.0 quality %, the iron of 0.5～1.5 quality %, the manganese of 0.25～1.0 quality %, zinc and the titanium of 0.05～0.35 quality % and the duraluminum that melting range is 470～650 ℃ of 0.10～1.5 quality %.
5. according to the method for claim 4; It is characterized in that, use the duraluminum of tin of plumbous and 0.10 quality % of magnesium, the 0.20 quality % of manganese, 1.2 quality % zinc, 0.15 quality % titanium, 0.10～0.5 quality % of iron, 0.1～0.5 quality % of copper, the 1.2 quality % of the silicon contain 7.0～9.5 quality %, 3.0～3.5 quality %.
6. the purposes that is used for the electrode of metal parts electrodischarge machining(E.D.M.) according to the graphite body conduct of claim 1 to 3.
7. according to the purposes of claim 6, it is as current electrode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910048006 DE102009048006B3 (en) | 2009-10-02 | 2009-10-02 | Graphite body impregnated with a light metal alloy, process for its preparation and its use |
| DE102009048006.4 | 2009-10-02 | ||
| PCT/EP2010/064762 WO2011039380A1 (en) | 2009-10-02 | 2010-10-04 | Graphite body impregnated with a light metal alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102549184A true CN102549184A (en) | 2012-07-04 |
Family
ID=43571274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800440641A Pending CN102549184A (en) | 2009-10-02 | 2010-10-04 | Graphite body impregnated with a light metal alloy |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2483433A1 (en) |
| CN (1) | CN102549184A (en) |
| DE (1) | DE102009048006B3 (en) |
| WO (1) | WO2011039380A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163985A (en) * | 2014-04-15 | 2016-11-23 | 东洋炭素株式会社 | Graphite-copper combination electrode material and the electro-discharge machining electrode using this material |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015117808A1 (en) * | 2015-10-20 | 2017-04-20 | Werner Schütze | Infiltration of light metals into porous granules or solids for the production of workpieces |
| CN106245023B (en) * | 2016-08-10 | 2018-07-27 | 广东工业大学 | A kind of preparation method of the surface reforming layer containing intermetallic Fe-Al compound |
| RU2753635C1 (en) * | 2020-12-21 | 2021-08-18 | Федеральное государственное бюджетное образовательное учреждение высшего образования «Волгоградский государственный технический университет» (ВолгГТУ) | Method for obtaining carbon-graphite composite material |
| RU2751859C1 (en) * | 2020-12-22 | 2021-07-19 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method for obtaining carbon-graphite composite material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4318193A1 (en) * | 1992-06-05 | 1993-12-09 | Tokai Carbon Kk | Material contg. 60-95 vol.% graphite plus aluminium@ alloy - used for piston mfr., obtd. by impregnation of graphite with molten alloy under high pressure |
| JP2004209610A (en) * | 2003-01-07 | 2004-07-29 | Toyo Tanso Kk | Electrode material for electrical discharge machining |
| CN101360906A (en) * | 2006-08-14 | 2009-02-04 | 贝贝尔·格赖纳 | Carbon piston for an internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008017756A1 (en) * | 2008-04-07 | 2009-10-15 | Carmag Gmbh | Carbon body impregnated with a light metal alloy |
-
2009
- 2009-10-02 DE DE200910048006 patent/DE102009048006B3/en not_active Expired - Fee Related
-
2010
- 2010-10-04 CN CN2010800440641A patent/CN102549184A/en active Pending
- 2010-10-04 WO PCT/EP2010/064762 patent/WO2011039380A1/en active Application Filing
- 2010-10-04 EP EP10772994A patent/EP2483433A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4318193A1 (en) * | 1992-06-05 | 1993-12-09 | Tokai Carbon Kk | Material contg. 60-95 vol.% graphite plus aluminium@ alloy - used for piston mfr., obtd. by impregnation of graphite with molten alloy under high pressure |
| JP2004209610A (en) * | 2003-01-07 | 2004-07-29 | Toyo Tanso Kk | Electrode material for electrical discharge machining |
| CN101360906A (en) * | 2006-08-14 | 2009-02-04 | 贝贝尔·格赖纳 | Carbon piston for an internal combustion engine |
Non-Patent Citations (1)
| Title |
|---|
| T.ETTER ET AL.: ""Physical properties of graphite /aluminium composites produced by gas pressure infiltration method"", 《CARBON》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163985A (en) * | 2014-04-15 | 2016-11-23 | 东洋炭素株式会社 | Graphite-copper combination electrode material and the electro-discharge machining electrode using this material |
| CN106163985B (en) * | 2014-04-15 | 2019-05-28 | 东洋炭素株式会社 | Graphite-copper combination electrode material and electro-discharge machining electrode using the material |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011039380A1 (en) | 2011-04-07 |
| EP2483433A1 (en) | 2012-08-08 |
| DE102009048006B3 (en) | 2011-03-17 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120704 |