EP2082072A2 - Prealloyed metal powder, process for obtaining it, and cutting tools produced with it - Google Patents
Prealloyed metal powder, process for obtaining it, and cutting tools produced with itInfo
- Publication number
- EP2082072A2 EP2082072A2 EP07848318A EP07848318A EP2082072A2 EP 2082072 A2 EP2082072 A2 EP 2082072A2 EP 07848318 A EP07848318 A EP 07848318A EP 07848318 A EP07848318 A EP 07848318A EP 2082072 A2 EP2082072 A2 EP 2082072A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- sintering
- cutting
- metal powder
- diamond
- 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.)
- Granted
Links
- 239000000843 powder Substances 0.000 title claims abstract description 133
- 238000005520 cutting process Methods 0.000 title claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 50
- 238000005245 sintering Methods 0.000 claims abstract description 50
- 239000010432 diamond Substances 0.000 claims abstract description 45
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 239000010949 copper Substances 0.000 claims description 25
- 239000000654 additive Substances 0.000 claims description 23
- 239000011324 bead Substances 0.000 claims description 23
- 230000000996 additive effect Effects 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 229910017052 cobalt Inorganic materials 0.000 claims description 9
- 239000010941 cobalt Substances 0.000 claims description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 235000019589 hardness Nutrition 0.000 description 15
- 239000010438 granite Substances 0.000 description 13
- 239000008187 granular material Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000011812 mixed powder Substances 0.000 description 6
- VAKIVKMUBMZANL-UHFFFAOYSA-N iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000000280 densification Methods 0.000 description 4
- 238000009854 hydrometallurgy Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 208000018747 cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
- C22C33/0214—Using a mixture of prealloyed powders or a master alloy comprising P or a phosphorus compound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Definitions
- Pre-metallized metal powder its production process, and cutting tools made with it.
- the invention relates to the field of pre-alloyed metal powders, from which diamond cutting tools such as saw segments and beads for the production of yarns for cutting hard materials such as granite are produced.
- the metal powders used to make diamond beads are usually made from granules containing about 20% tungsten carbide and about 80% cobalt. These granules are mixed with diamonds and compressed in the form of rings, and the green parts are sintered according to two possibilities.
- the object of the invention is above all to provide pre-alloyed metal powders whose cost would be relatively moderate, and which would be compatible with processes for manufacturing diamond beads substantially less expensive than existing processes, in particular because natural sintering , realized without mold, would nevertheless make it possible to obtain sufficiently powerful products, in particular for the cut of the granite. Also, these powders should be compatible with the manufacture of other types of cutting tools for less demanding applications.
- the subject of the invention is a pre-alloyed metal powder, in particular for the manufacture of sintering cutting tools, characterized in that its composition in weight percentages is:
- the Fisher diameter of its particles is 1 to 3 ⁇ m. It is preferably constituted by a mixture of such a powder and of at least one sintering aid additive in a proportion of 80 to 90% by weight of powder and 10 to 20% by weight of additive.
- the sintering aid additive is preferably a phosphide of iron, nickel, copper or cobalt, or a mixture of at least two of these phosphides, or a mixed phosphide of at least two of these metals.
- the powder is preferably obtained by mixing a first powder and a second powder, and a possible sintering additive, said first and second powders having the respective characteristics:
- the Fisher diameter of the particles of the first powder is 0.8 to 1.5 ⁇ m
- the Fisher diameter of the particles of the second powder is 3.0 to 4.0 ⁇ m
- the Fisher diameter of the powder. obtained after mixing is 1 to 3 ⁇ m.
- the subject of the invention is also a process for manufacturing a diamond cutting tool, comprising in particular a step of mixing a pre-alloyed metal powder and diamonds, a cold pressing step of the mixture and a sintering step to said mixture.
- tablet characterized in that said metal powder is of the preceding type.
- Sintering is preferably natural sintering.
- Said tool can be a cutting segment for diamond saw.
- Said tool can be a diamond bead for cutting wire.
- Said powder may be of the aforementioned type.
- the invention also relates to a diamond saw of the type comprising cutting segments fixed on the periphery of a metal disk, characterized in that said segments were obtained by the above method.
- the invention also relates to a cutting wire of the type comprising diamond beads threaded on a cable, characterized in that said beads were obtained by the above method.
- the invention is based on the use of a prealloyed powder of precise composition, based on iron, cobalt and copper. It turns out that this powder, which does not implement very expensive elements in high proportions, allows for diamond cutting tools (saws and beads) high performance by simple natural sintering, so by an economical process and can be run with high productivity.
- a process for obtaining the powder, making it possible to obtain sintered products of particularly high characteristics from said powder, is also proposed.
- the prealloyed powder according to the invention must in particular meet the following requirements.
- the relative density of the raw parts obtained with it must be at least 60% for a maximum cold pressure of 700 MPa.
- the relative density of the part obtained must preferably be at least 97 %.
- the powder must be able to be used to manufacture parts whose hardness after sintering would be at least 220 HB, so that they can be used for cutting the granite. It appears that these objectives, as well as those previously expressed, are achieved, according to the invention, using a prealloyed powder having the following characteristics.
- composition is (in percentages by weight):
- the mean Fisher diameter of the particles is preferably from 1 to 3 ⁇ m.
- the ratio between the iron and cobalt contents is deliberately adjusted so as to avoid forming a hard and weak ⁇ 'phase, which is formed when the mass ratio Fe / (Fe + Co) is between 30 and 70%. According to the invention, this ratio is between 72 and 78%, and the ⁇ 'phase is avoided.
- the amount of copper added is that which is sufficient to provide good sintering.
- the oxygen content is maintained at a maximum of 1.2% to avoid the presence of oxides which would not be reduced entirely by hydrogen during natural sintering.
- Such unreduced oxides would reduce the sinterability of the green parts, cause heterogeneities in the structures of the sintered parts, increase the hardness, therefore the fragility of the parts and react with the diamonds by destroying them at least on the surface. This would reduce the cutting performance of the tools.
- This powder can be obtained in particular in two different ways.
- a powder having the desired composition and morphology characteristics is prepared directly by the conventional hydrometallurgical route.
- This hydrometallurgical route consists in first producing metal hydroxides by sodium hydroxide precipitation of a mixture of metal chlorides according to the reaction: x CuCl 2 + y FeCl 3 + z CoCl 2 + (2 + t) NaOH -> Cu x Fe y Co 2 (OH) 2 + 2
- x, y and z are in ratios corresponding to the atomic ratios which one wishes to find on the final powder between the respective contents in Cu, Fe, Co.
- Solid-liquid separation is then carried out followed by washing the hydroxide cake with deionized water to remove NaCl.
- the cake is then passed through a dryer to obtain a co-precipitated hydroxide powder with a residual water content of a few%.
- the hydroxide powder is reduced, in order to be transformed into a pre-alloyed metal powder.
- This reduction is preferably carried out in a scroll oven and under H 2 according to: Cu x Fe y Co z (OH) + H 2 -> Cu x + Fe y + Co 2 + H 2 O.
- the pre-alloyed powder is ground under an inert gas in a mill, then sieved at 90 ⁇ m.
- the powder according to the invention is produced by mixing two powders of different compositions, also obtained separately by hydrometallurgy.
- Table 1 shows the compositions of the two powders to be used:
- Table 1 characteristics of the powders I and II used.
- a mixture of the powders I and II in relative proportions of 60 - 40% by weight approximately makes it possible to manufacture the powder according to the invention.
- the powder according to the invention After obtaining the powder according to the invention, it can be used directly or granulated by a conventional method that will now be described. These granules can then be used to make specific diamond tools, such as diamond threads and thin diamond segments.
- the prealloyed powder to be granulated is mixed with an organic binder powder at 2 to 3% by weight of the amount of powder to be granulated and an organic solvent in a high shear granulator. After the granulation step, the solvent is removed by evaporation.
- the granules are sieved continuously on vibrating screens comprising two superposed canvases, openings of different mesh (450 microns for the first, 63 microns for the second for example). The fraction of diameter between 63 ⁇ m and 450 ⁇ m is thus selected. The finer and coarser granules are recycled during the next granulation operation.
- additives known for this purpose such as tungsten carbide
- tungsten carbide have proved to be ineffective in the context of the invention because they decreased the densification during sintering, and thus the hardness of the parts, the opposite result of what was desired.
- the tungsten carbide is insoluble in the powder according to the invention and therefore does not metallurgically bind to the metal matrix.
- iron phosphide makes it possible to obtain remarkable results from this point of view; the phosphides of nickel, copper and cobalt are also interesting.
- the powder obtained by mixing (“powder mixture”) was in a blender previously put under CO 2 , from 60% of powder I and 40% of powder II, these powders having been previously prepared separately by hydrometallurgy. The mixing operation lasted 50 minutes.
- the "direct” and “mixing” powders were then compressed to 200 MPa in order to produce PS 21 pieces, whose raw density was calculated from their dimensions and their weight.
- the direct powder had a density equal to 58.0% of the theoretical density, the powder mixes a density equal to
- the PS21 parts are parallelepipedal pieces obtained by cold compression at 200 MPa of 6 g of powder in a steel matrix of dimensions 24.48 x 7.97 mm.
- the height of the green part obtained depends on the compressibility of the powder, and is generally of the order of 5 to 6 mm.
- Table 2 results of the sintering of direct powders and mixing. The test results show that the direct powder has better cold compressibility than the mixed powder. It will therefore be the easiest of the two to form before sintering.
- the mixed powder has the best sintering densification and the best hardness after sintering.
- Table 3 results of the sintering of direct powders and mixture additive to FeP.
- the hierarchy of performances between the direct powders and additive mix with FeP is the same as for pure powders (not additive).
- the mixed powder has the best results after sintering.
- the additivation makes it possible to obtain sintered pieces having a hardness substantially higher than that of the parts obtained under the same conditions from non-additive powders, as can be seen by comparing the results of Tables 2 and 3.
- a powder according to the invention to which one would add FeP at a rate of 85% of powder and 15% of FeP would end up with approximately the following characteristics:
- Table 4 results of the sintering of the mixed powder additive with NiP.
- NiP under the conditions that have been said also provides outstanding results in terms of density and hardness sintered parts.
- a powder according to the invention to which NiP would be added at a rate of 85% of powder and 15% of NiP would have approximately the following characteristics:
- the additivation can also be carried out using copper phosphide or cobalt. Also, a mixture of at least two of iron, nickel, copper and cobalt phosphides or a mixed phosphide of at least two of these metals can be used.
- the segments made with the reference powder and with the powder of the invention were sintered by natural sintering in a rolling oven at 940 ° C. for the powder of the invention and 980 ° C. for the reference powder, and then brazed. on 500 mm diameter steel discs to form the saws. Granites of different categories were then cut with saws. For each type of powder, three types of diamond mixtures were tested, made from diamonds of the company ELEMENT SIX whose references will be indicated.
- the reference saw had a service life of 4.4 m 2 / mm and a cutting speed of 520 cnrYmin).
- the saw of the invention had a service life of 4.8 m 2 / mm and a cutting speed of 620 cnfVmin.
- the reference saw was unable to cut the granite.
- the saw of the invention had a life of 3 m 2 / mm and a cutting speed of 620 cm 2 / min.
- the saw of the invention had a service life of 6.7 m 2 / mm and a cutting speed of 900 cm 2 / min.
- the results of tests of the saws of the invention are excellent in absolute value, and systematically better in every respect than those of the reference saws.
- beads had outer diameters of 7.2 mm (beads for multi-thread machines) and 11 mm (beads for single-thread machines) and were manufactured by the following process:
- brazing at 900 ° C. using a solder containing 72% of Ag and 28% of Cu to ensure sufficient bonding on the steel sheath which serves as a support.
- the debinding, sintering and brazing operations were carried out in an oven under H 2 .
- the beads obtained were threaded onto steel cables at the rate of 37 beads / linear meter, then the assembly was plasticized to stiffen it.
- Table 5 results of the tests carried out on cutting son (pearls made from powder according to the invention additive of FeP).
- the invention makes it possible to produce high-performance diamond beads at a substantially lower cost than by conventional methods.
- life of usual son, using diamond-coated titanium is of the order of 28 m z / m linear.
- the powder according to the invention, used pure has a good cold compressibility and densifies very correctly from 900 ° C. (97% of its theoretical density), in particular when it is obtained by mixing the powders I and II as previously defined.
- the hardness obtained after sintering can be considered as insufficient for the cutting of the granite, but would be sufficient for the cutting of marble.
- the addition of 15% iron phosphide or nickel increases the densification and hardness of the sintered parts in a manner that makes them perfectly suitable for cutting the granite.
- a “mixture 1" mixture under CO 2 was prepared for 50 min from commercial Fe, Co and Cu powders as shown in Table 6:
- the weight percentages of metals are expressed excluding oxygen content.
- This composition is in the middle of the range of the prealloyed powder according to the invention.
- the weight percentages of metals and phosphorus are expressed excluding oxygen content.
- PS21-type parts were compressed at 200 MPa.
- the powder according to the invention in particular in its additive version, is easily granular, which makes it possible to produce thin segments and diamond threads by inexpensive methods. It is easily sinterable in the presence of diamonds, whether in a static oven or in a scrolling oven, both in powder form and in the form of granules. It responds very well to the problems posed.
- the powder according to the invention could also be used with advantage for making cutting tools by methods other than those described.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07848318T PL2082072T3 (en) | 2006-10-04 | 2007-10-04 | Prealloyed metal powder, process for obtaining it, and cutting tools produced with it |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0608709A FR2906739B1 (en) | 2006-10-04 | 2006-10-04 | PREALLIED METAL POWDER, PROCESS FOR OBTAINING IT, AND CUTTING TOOLS MADE WITH IT |
PCT/FR2007/001622 WO2008040885A2 (en) | 2006-10-04 | 2007-10-04 | Prealloyed metal powder, process for obtaining it, and cutting tools produced with it |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2082072A2 true EP2082072A2 (en) | 2009-07-29 |
EP2082072B1 EP2082072B1 (en) | 2018-01-10 |
Family
ID=37944729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07848318.7A Active EP2082072B1 (en) | 2006-10-04 | 2007-10-04 | Prealloyed metal powder, process for obtaining it, and cutting tools produced with it |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP2082072B1 (en) |
KR (1) | KR20090060330A (en) |
CN (1) | CN101541990B (en) |
DK (1) | DK2082072T3 (en) |
ES (1) | ES2663267T3 (en) |
FR (1) | FR2906739B1 (en) |
HU (1) | HUE036676T2 (en) |
PL (1) | PL2082072T3 (en) |
PT (1) | PT2082072T (en) |
WO (1) | WO2008040885A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3808864A1 (en) | 2019-10-15 | 2021-04-21 | ECKA Granules Germany GmbH | Premix alloy powders for diamond tools |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101961784B (en) * | 2010-09-21 | 2012-06-27 | 博深工具股份有限公司 | Powder metallurgy material and method for manufacturing diamond bit |
CN102407336A (en) * | 2010-09-25 | 2012-04-11 | 李国平 | Method for preparing partially pre-alloyed iron powder by short process |
CN102672824B (en) * | 2012-06-04 | 2015-01-21 | 安泰科技股份有限公司 | Tungsten-copper based diamond cutter bit and diamond round saw blade and manufacture method thereof |
CN104128893A (en) * | 2014-07-31 | 2014-11-05 | 泉州众志金刚石工具有限公司 | Diamond abrasive grinding block |
CN104439255B (en) * | 2014-12-30 | 2016-06-22 | 中国有色桂林矿产地质研究院有限公司 | A kind of preparation method of diamond bead |
CN104907732A (en) * | 2015-06-18 | 2015-09-16 | 鄂州市金刚石技术研发中心 | Prealloy powder used for laser welding diamond saw blade transition layer and preparation method |
CN105695830A (en) * | 2016-01-29 | 2016-06-22 | 长沙百川超硬材料工具有限公司 | Pressure-free sintering preparation method of diamond string bead |
CN107419155B (en) * | 2017-05-12 | 2018-10-23 | 郑州航空工业管理学院 | A kind of Fe-Co is base single phase solid solution Fe-Co-Cu ternary alloy three-partalloys and preparation method thereof |
CN111822716A (en) * | 2020-07-21 | 2020-10-27 | 泉州华大超硬工具科技有限公司 | Preparation method of novel technical bead string |
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ATE214435T1 (en) * | 1997-04-29 | 2002-03-15 | Umicore S A Nv | PRE-ALLOYED COPPER CONTAINING POWDER AND ITS USE IN DIAMOND TOOL MANUFACTURING |
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EP3808864A1 (en) | 2019-10-15 | 2021-04-21 | ECKA Granules Germany GmbH | Premix alloy powders for diamond tools |
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FR2906739B1 (en) | 2009-07-17 |
PT2082072T (en) | 2018-03-28 |
EP2082072B1 (en) | 2018-01-10 |
CN101541990B (en) | 2011-08-03 |
HUE036676T2 (en) | 2018-07-30 |
DK2082072T3 (en) | 2018-04-16 |
WO2008040885A2 (en) | 2008-04-10 |
WO2008040885A3 (en) | 2008-07-03 |
KR20090060330A (en) | 2009-06-11 |
CN101541990A (en) | 2009-09-23 |
FR2906739A1 (en) | 2008-04-11 |
PL2082072T3 (en) | 2018-07-31 |
ES2663267T3 (en) | 2018-04-11 |
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