CN1116954C - Discharge surface treating electrode and production method thereof - Google Patents
Discharge surface treating electrode and production method thereof Download PDFInfo
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- CN1116954C CN1116954C CN99810834A CN99810834A CN1116954C CN 1116954 C CN1116954 C CN 1116954C CN 99810834 A CN99810834 A CN 99810834A CN 99810834 A CN99810834 A CN 99810834A CN 1116954 C CN1116954 C CN 1116954C
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Abstract
The present invention discloses a discharge surface treating electrode and a manufacture method thereof. The present invention has the manufacture method that discharge is generated between the electrode and materials to be treated; metal carbide powder TiC powder (11) and metal hydride powder TiH2 powder (12) are mixed in the discharge surface treating electrode by a hard covering film formed on the surface of the materials to be treated by the discharge energy; heat treatment is carried out after compression formation; hydrogen in the TiH2 powder (12) is released so as to from Ti powder (13). Consequently, the discharge surface treating electrode (10) with proper intensity, appropriate collapse, safety, reliability and practicality is formed.
Description
Technical field
The present invention relates to make and produce discharge between electrode and the processed material, on the processed material surface, form the hard coverlay that constitutes by electrode material according to the energy size, perhaps electrode material utilizes its discharge energy to form the hard coverlay that is made of reactive material, is used for the improved electric discharge surface treating electrode and the manufacture method thereof of discharging surface processing.
Background technology
In the past, as form the hard coverlay on the processed material surface, giving technology corrosion-resistant, wearability for example had disclosed discharge surface treating method in Japanese kokai publication hei 5-148615 communique.The metal material discharge surface treating method that this technology is made up of two procedures.Earlier the powder pressed electrode that forms with WC (tungsten carbide) powder and Co (cobalt) powder, compression molding carries out time processing (pile up and process), then changes the fewer electrode of consumption of electrode such as copper electrode into and carries out secondary operations (melt-processed again).This method can form the hard coverlay with good bond power to steel, is quite difficult but will form the hard coverlay with good bond power for agglomerated materials such as superhard alloys.
But, known to our research, with the material as electrode of compositions such as Ti hard carbides such as (titaniums), making at processed material is to produce discharge between the metal material, thereby not having melting process again, is that the metal surface forms firm hard coverlay at processed material.This is because the composition carbon reaction in used up electrode material of discharge and the working fluid generates the cause of TiC (titanium carbide).In addition, well-known, pass through TiH
2It is to produce discharge between the metal material that the powder pressed electrode of metal hydrides such as (titantium hydrides) makes processed material, can more promptly form the stronger hard coverlay of bonding force than the occasion of using materials such as Ti.And then, by at TiH
2Deng sneaking into the powder pressed electrode that other metal, pottery form in the hydride, make and processed material is to discharge between the metal material, then can form the good hard coverlay of each side character such as have hardness, wear-resisting as quick as thought.
Relevant these class methods are for example open in Japanese kokai publication hei 9-192937 communique, utilize Fig. 3 that the configuration example of using this apparatus for discharge surface treatment is described.Among the figure, 1 is TiH
2The powder pressed electrode that powder compression molding forms, 2 for processed material, 3 for working groove, 4 is switch element, 6 the control circuits for gauge tap element 5 closures, disconnection of working fluid, 5 for being applied to voltage and current switch on powder pressed electrode 1 and the processed material 2,7 be power supply, 8 for resistor, 9 be formed hard coverlay.According to such formation,, regulate discharge energy, thereby can on the surface of processed materials such as iron and steel, superhard alloy 2, form hard coverlay 9 with good bond power by between powder electrode and processed material, producing discharge.
The electrode that is used for this discharging surface processing is not as there being certain stable intensity, it is very difficult dealing with, simultaneously when discharging surface is handled, because discharge energy, electrode can be held by excessive land fall, exists electrode material and can not stick to the lip-deep problem of processed material with the state of fusion.In addition, too high at pole strength, when electrode was too firm, by the discharge electric energy, electrode was difficult to avalanche when discharging surface is handled, and has the problem that treatment effeciency reduces.Therefore, require electric discharge surface treating electrode that suitable intensity and suitable avalanche will be arranged.As the metal hydride for example of the material with such characteristic, but because have touch water will danger on fire naturally, so on safety, have problems.Therefore, in practicality, can not obtain with containing the electric discharge surface treating electrode that metal hydride is made electrode material.
Summary of the invention
Purpose of the present invention is exactly in order to solve aforesaid problem, provides and can improve the treatment effeciency that discharging surface is handled, and extremely safe is saved manufacturing cost simultaneously again, obtains practical electric discharge surface treating electrode and manufacture method thereof.
The electric discharge surface treating electrode that the 1st invention relates to, be used to make between electrode and processed material and discharge, and utilize its energy to handle at the discharging surface that aforementioned processed material surface forms the hard coverlay, at least mix with metal carbide powders and metal hydride powder, carry out heat treated after the compression molding, and the hydrogen that discharges in the aforementioned metal hydride forms.
The electric discharge surface treating electrode that the 2nd invention relates to is that the aforementioned metal carbide is a titanium carbide in the 1st invention, and aforementioned metal hydride is titantium hydride.
The 3rd electric discharge surface treating electrode that relates to of invention is in the 1st invention, considers that simultaneously the difficulty or ease of pole strength and avalanche set the mixing ratio of aforementioned metal carbonized powder and aforementioned metal hydride.
The electric discharge surface treating electrode manufacture method that the 4th invention relates to be used to make produce discharge between electrode and the processed material, and the discharging surface that utilizes its energy to form the hard coverlay on aforementioned processed material surface is handled.
At least mix with metal carbide powders and metal hydride powder, carry out heat treated after the compression molding, and the hydrogen that discharges in the aforementioned metal hydride is made aforementioned electric discharge surface treating electrode.
The electric discharge surface treating electrode manufacture method that the 5th invention relates to is that the aforementioned metal carbide is a titanium carbide in the 4th invention, and aforementioned metal hydride is titantium hydride.
The 6th electric discharge surface treating electrode manufacture method that relates to of invention is in the 4th invention, considers that simultaneously the difficulty or ease of pole strength and avalanche set the mixing ratio of aforementioned metal carbide powder and aforementioned metal hydride.
So the present invention has the effect shown in following because of having aforementioned formation.
The electric discharge surface treating electrode that the 1st invention and the 2nd invention relate to has the effect of inexpensive and extremely safe.In handling with the discharging surface of this electric discharge surface treating electrode in addition, good hard coverlay can not only be on processed material, formed, the effect of treatment effeciency can be improved simultaneously in addition.
The electric discharge surface treating electrode that the 3rd invention relates to, have and the same effect of the 1st invention, simultaneously, the electric discharge surface treating electrode that pole strength that the discharging surface treatment characteristic that can also obtain and expect adapts and avalanche are suitable, use this electric discharge surface treating electrode discharging surface handle, have and can form the effect of closing the good hard coverlay that accords with the processed material characteristic.
The 4th invention is invented the manufacture method that relates to electric discharge surface treating electrode with the 5th, and it has the effect of the electric discharge surface treating electrode that cheap and extremely safe can stably be provided.In addition, in the discharging surface of using the electric discharge surface treating electrode of making according to this manufacture method is handled, not only on processed material, good hard coverlay can be formed, the effect of treatment effeciency can be improved simultaneously in addition.
The manufacture method of the electric discharge surface treating electrode that the 6th invention relates to, have and the same effect of the 4th invention, can make simultaneously and have pole strength and the suitable electric discharge surface treating electrode of avalanche that adapts with the discharging surface treatment characteristic of expecting, in the discharging surface that uses this electric discharge surface treating electrode is handled, have can form and close the effect that accords with processed material characteristic, good hard coverlay.
Brief Description Of Drawings
Fig. 1 represents electric discharge surface treating electrode related to the present invention and manufacture method key diagram thereof.
Fig. 2 represents the key diagram of configuration example of the apparatus for discharge surface treatment of use electric discharge surface treating electrode related to the present invention.
Fig. 3 represents the key diagram of configuration example of the apparatus for discharge surface treatment of use electric discharge surface treating electrode in the past.
The best mode that carries out an invention
As shown in the background technology, require electric discharge surface treating electrode that suitable intensity and suitable avalanche are arranged, the material metal oxide with such characteristic but has problem on safety.Therefore, be necessary to make and have the intensity that is suitable for electric discharge surface treating electrode and the avalanche same with metal hydride, and the electrode of forming by the material of no problem on the safety.For this purpose, according to the experiment that various material is done, know that the intensity of powder pressed electrode after the compression molding and the hardness of powder have confidential relation.Promptly, when powder is high rigidity, for example be occasions such as metal carbides, even if because in compression molding but the shape of powder also be difficult to change, the difficulty that is shaped or be exactly to be shaped but can to become fragile, in addition, again when powder hardness is low, for example be the powder occasion of metal monomer, in case the compression molding powder is with regard to easy deformation, so have very strong compendency.
Therefore, mix compression molding with predetermined mixing ratio, thereby can obtain to have desired intensity and the suitable electric discharge surface treating electrode of avalanche as can be known by the powder that hardness is different.
Below, be an example with the different powder of hardness, to metal carbides (high rigidity) TiC powder and metal monomer (soft) Ti powder, compression molding is made the situation of electrode and is done an explanation.As electric discharge surface treating electrode, for making it that good flash-over characteristic be arranged in the discharging surface processing procedure, need to do the particle diameter of this electrode material powder less than 10 μ m, but Ti is the material that has viscosity that the particle diameter of Ti powder be run business into particular one is the thing of part difficulty.Promptly, use ball mill usually, the ball of powder and pottery is put into together and rotated for powder is pulverized again.Although use such device, in the occasion of Ti powder, also can be because of Ti is the reason with material of viscosity, powder just deforms, and powder does not have further refinement.Therefore, when electrode material is the Ti powder, obtains the small electrode material powder of particle diameter that is suitable for electric discharge surface treating electrode and will pay very high manufacturing cost.So can not obtain practical electric discharge surface treating electrode.
It is very important selecting electrode material as can be known by above narration, in order to give electric discharge surface treating electrode desired intensity and suitable avalanche, so the powder of different hardness is mixed with predetermined mixing ratio, simultaneously, do the particle diameter of these powder more finely with the instinct that manufactures of a practicality.Use selected material in view of such idea, Fig. 1 represents the electric discharge surface treating electrode related to the present invention and the key diagram of manufacture method thereof.In the drawings, 10 is that the electric discharge surface treating electrode, 11 that the present invention relates to is that metal carbide powders TiC powder, 12 is metal hydride powder TiH
2Powder, 13 is a metal monomer powders Ti powder.In addition, Fig. 2 is for using an apparatus for discharge surface treatment example of the electric discharge surface treating electrode formation that the present invention relates to, in the drawings, 2 is that processed material, 3 is that working groove, 4 is that working fluid, 5 is for being applied to the switch element of voltage across poles and current switch, 6 is that the closure of gauge tap element 5, the control circuit, 7 of disconnection are that power supply, 8 is resistor, and 10 is the hard coverlays of electric discharge surface treating electrode, 14 for forming on the processed material 2 that the present invention relates to.By means of such formation,,, thereby can on the surface of processed material 2, form hard coverlay with secure adhesion power according to discharge energy by the discharge between electric discharge surface treating electrode 10 and processed material.
In Fig. 1 (a), the TiC powder is a high hardness material, TiH
2Powder is a low-durometer material.Such as described above, by the mixing ratio of these powder, can adjust the intensity of electrode and the difficulty or ease of avalanche.According to experiment as can be known, TiC powder 11 and TiH
2The mixing ratio of powder 12 can compression molding by 1: 9 to 9: 1 scope, and with TiH
2The increase of powder 12 mixing ratios, press-powder body intensity also increases.Therefore, by changing the mixing ratio of this metal carbide powders and metal hydride powder, thereby can change the intensity of press-powder body, and then also can change the difficulty or ease of pole strength and avalanche.
In addition, compression molding can be by being that mixed-powder is put into mould and undertaken by press pressurization with aforesaid electrode material.
Like this, by by metal carbide powders TiC powder 11 and metal hydride powder TiH
2Powder 12 is formed on powder, does particle diameter very little easily (1 μ m～3 μ m).This is because can easily produce fine about TiC powder in factory, moreover, TiH
2Can very easily be pulverized.For example, TiC powder and the big TiH of particle diameter that particle diameter is little
2Powder mixes, and carries out powder-processed, then TiH with aforesaid ball mill
2The pruinescence refinement can obtain tiny TiC of particle diameter and TiH
2Mixed-powder.Do like this,, can reduce the powder manufacturing cost because can form the fine powder of particle diameter at an easy rate.
But just with such state, intactly as electric discharge surface treating electrode, then intensity is low, fragile.Contain titantium hydride again nature danger on fire is also arranged.Thereby, with TiC powder and TiH
2Powder mixes with predetermined mixing ratio, to the press-powder body heat treated (Fig. 1 (a)) that forms after the compression molding, passes through TiH
2Decompose, discharge hydrogen and form metal Ti, thereby can obtain having suitable intensity and avalanche that suits and safe and practical electric discharge surface treating electrode 10 (Fig. 1 (b)).
Aforesaid heat treated can for example be placed on the press-powder body of Fig. 1 (a) in the electric furnace and implement by high-frequency heating.
According to such manufacture method, seek to improve the treatment effeciency that discharging surface is handled, more safe and reliable, the electric discharge surface treating electrode of while energy stable supplying cheapness.
The relevant TiC powder that uses of expression is made metal carbide powders, TiH in above explanation
2Powder is as the situation of metal hydride powder, even if but use other metal carbide powders and metal hydride powder to prove effective too.
Industrial applicibility
As previously discussed, the electrode that the present invention relates to is applicable to the discharging surface processing. In addition, this The manufacture method of the bright electric discharge surface treating electrode that relates to is suitable for the system of aforementioned electric discharge surface treating electrode Make.
Claims (6)
1. an electric discharge surface treating electrode is used to make produce discharge between electrode and the processed material, and utilizes its energy to form the discharging surface processing of hard coverlay on the surface of described processed material, it is characterized in that,
At least mix with metal carbide powders and metal hydride powder, carry out heat treated after the compression molding, and the hydrogen that discharges in the described metal hydride forms.
2. electric discharge surface treating electrode as claimed in claim 1 is characterized in that described metal carbides are titanium carbides, and described metal hydride is a titantium hydride.
3. electric discharge surface treating electrode as claimed in claim 1 is characterized in that,
Consider the pole strength of expectation and the difficulty or ease of avalanche simultaneously, in 1: 9 to 9: 1 scope, set the mixing ratio of described metal carbide powders and metal hydride powder.
4. the manufacture method of an electric discharge surface treating electrode is used to make produce discharge between electrode and the processed material, and utilizes its energy to form the discharging surface processing of hard coverlay on the surface of described processed material, it is characterized in that,
At least mix with metal carbide powders and metal hydride powder, carry out heat treated after the compression molding, and the hydrogen that discharges in the described metal hydride is made described electric discharge surface treating electrode.
5. the manufacture method of electric discharge surface treating electrode as claimed in claim 4 is characterized in that,
Described metal carbides are titanium carbide, and described metal hydride is a titantium hydride.
6. the manufacture method of electric discharge surface treating electrode as claimed in claim 4 is characterized in that,
Consider the pole strength of expectation and the difficulty or ease of avalanche simultaneously, in 1: 9 to 9: 1 scope, set the mixing ratio of described metal carbide powders and metal hydride powder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4832061 | 1999-07-16 | ||
| PCT/JP1999/003830 WO2001005545A1 (en) | 1999-07-16 | 1999-07-16 | Discharge surface treating electrode and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1316932A CN1316932A (en) | 2001-10-10 |
| CN1116954C true CN1116954C (en) | 2003-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99810834A Expired - Fee Related CN1116954C (en) | 1999-07-16 | 1999-07-16 | Discharge surface treating electrode and production method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN1116954C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10225824A (en) * | 1997-02-17 | 1998-08-25 | Kagaku Gijutsu Shinko Jigyodan | Discharge surface treatment method, and treatment device |
| JPH11827A (en) * | 1997-06-10 | 1999-01-06 | Res Dev Corp Of Japan | Electric discharge surface treating method |
-
1999
- 1999-07-16 CN CN99810834A patent/CN1116954C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10225824A (en) * | 1997-02-17 | 1998-08-25 | Kagaku Gijutsu Shinko Jigyodan | Discharge surface treatment method, and treatment device |
| JPH11827A (en) * | 1997-06-10 | 1999-01-06 | Res Dev Corp Of Japan | Electric discharge surface treating method |
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| Publication number | Publication date |
|---|---|
| CN1316932A (en) | 2001-10-10 |
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