NO127335B - - Google Patents
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- Publication number
- NO127335B NO127335B NO287371A NO287371A NO127335B NO 127335 B NO127335 B NO 127335B NO 287371 A NO287371 A NO 287371A NO 287371 A NO287371 A NO 287371A NO 127335 B NO127335 B NO 127335B
- Authority
- NO
- Norway
- Prior art keywords
- carbide
- alloy
- molybdenum
- sintered
- vanadium
- Prior art date
Links
- 239000000956 alloy Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 claims description 7
- 229910039444 MoC Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 5
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 description 7
- 238000005245 sintering Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 150000001247 metal acetylides Chemical group 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910003178 Mo2C Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
- B60C11/16—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Description
Glidningshindrende knast, Anti-slip knob,
spesielt for kjøretøydekk. especially for vehicle tires.
I norsk patentskrift nr. 117-520 er der beskrevet en glidningshindrende knast, spesielt for kjøretøydekk, som helt eller for en slitedels vedkommende består av en legering med følgende sammensetning: 43 - 89$ titankarbid, 1 - k5% molybdenkarbid og/eller vanadiumkarbid, idet inntil halvparten av vanadiumkarbidet i legeringer uten molybdenkarbid kan være erstattet av niobkarbid, 0 - 22,5$ wolframkarbid, 10 - 22% av'ett eller flere metaller av jerngruppen og 0 - 3$ krom. In Norwegian patent document no. 117-520, there is described an anti-slip lug, especially for vehicle tyres, which entirely or for a wear part consists of an alloy with the following composition: 43 - 89$ titanium carbide, 1 - k5% molybdenum carbide and/or vanadium carbide, in that up to half of the vanadium carbide in alloys without molybdenum carbide can be replaced by niobium carbide, 0 - 22.5$ tungsten carbide, 10 - 22% of one or more metals of the iron group and 0 - 3$ chromium.
Fortrinnsvis er legeringens karboninnhold lavere enn svarende til den støkiometriske sammensetning av de i legeringen inneholdte karbider. Som spesielt foretrukket er angitt legeringer som inneholder 63 - 78$ titankarbid, 10 - 25$ molybdenkarbid og Preferably, the carbon content of the alloy is lower than corresponding to the stoichiometric composition of the carbides contained in the alloy. Alloys containing 63 - 78% titanium carbide, 10 - 25% molybdenum carbide and
Ved den praktiske anvendelse av den oppfinnelse som er beskrevet i norsk patentskrift nr. 117.520, har det overraskende vist seg at der oppnås optimale verdier for hardhet og slitestyrke og samtidig også en høy seighet når de glidningshindrende knaster har en bestemt strukturtype. Ifølge oppfinnelsen består denne i at kornstørrelsen av karbidpartiklene i det sintrede hardmetall er mindre enn 5 p m og for minst 90 volumprosents vedkommende mindre enn 3 og at de takkete kanter og typiske kornformer av finmalte karbidpartikler i stor utstrekning fremdeles kan gjenkjennes i den sintrede struktur. Et hardmetall med en slik struktur oppviser en kombinasjon av styrke og seighet som hittil ikke er oppnådd i hardmetall med et innhold på minst 43% titankarbid. In the practical application of the invention described in Norwegian patent document no. 117,520, it has surprisingly been shown that optimal values for hardness and wear resistance are achieved and at the same time also a high toughness when the anti-slip lugs have a specific structural type. According to the invention, this consists in the fact that the grain size of the carbide particles in the sintered carbide is less than 5 µm and for at least 90 percent by volume less than 3 and that the jagged edges and typical grain shapes of finely ground carbide particles can still be recognized to a large extent in the sintered structure. A cemented carbide with such a structure exhibits a combination of strength and toughness that has not yet been achieved in cemented carbide with a content of at least 43% titanium carbide.
Den struktur som skal foreligge i de glidningshindrende knaster ifølge oppfinnelsen, fremkommer når sintringen av de pressede pulveremner utføres ved moderat temperatur og i et så kort tidsrom at en labil til metastabil strukturtilstand ikke overskrides i det ferdige sintrede legeme. Porat der skal kunne fremstilles tette sintringslegemer med denne strukturtilstand, må det ved malingen og den videre behandling av pulveret sørges for at pulveret forblir sterkt aktivt helt frem til sintringen. Til dette formål må det finmalte pulver omhyggelig beskyttes mot oksydasjon. Det er f.eks. fordelaktig å utføre våtmalingen av pulveret under en inert gass. Videre har det vist seg gunstig å holde karboninnholdet i noen The structure to be present in the non-slip lugs according to the invention occurs when the sintering of the pressed powder blanks is carried out at a moderate temperature and in such a short period of time that a labile to metastable structural state is not exceeded in the finished sintered body. In order to be able to produce dense sintering bodies with this structural state, it must be ensured during the painting and the further processing of the powder that the powder remains highly active right up until sintering. For this purpose, the finely ground powder must be carefully protected against oxidation. It is e.g. advantageous to carry out the wet grinding of the powder under an inert gas. Furthermore, it has proven beneficial to keep the carbon content in some
eller alle karbider opptil 25$ lavere enn svarende til formlene TiC, Mo2C og VC.« Dette kan for molybdenkarbids vedkommende oppnås ved at en del av Mo^C-materialet erstattes av metallisk molybden ved blandingen av pulveret. or all carbides up to 25$ lower than corresponding to the formulas TiC, Mo2C and VC.« In the case of molybdenum carbide, this can be achieved by replacing part of the Mo^C material by metallic molybdenum when mixing the powder.
Strukturtypen i de glidningshindrende knaster ifølge oppfinnelsen vil bli nærmere belyst ved hjelp av'tegningen, som gjengir fotografier av mikroslip i 2000 gangers forstørrelse. Fig. 1 viser strukturen av en glidningshindrende knast ifølge oppfinnelsen. Fig. 2 viser strukturen av en glidningshindrende knast som ligger i grenseområdet og såvidt innenfor grensene for struktur-området ifølge oppfinnelsen. Fig. 3 viser en struktur som ligger utenfor struktur-området ifølge oppfinnelsen. Fig. 1 viser at de enkelte karbidpartikler er meget fine (overalt'mindre enn 5 um) og fremdeles har den uregelmessige form' og The type of structure in the anti-slip lugs according to the invention will be further explained with the help of the drawing, which reproduces photographs of microsands at 2000 times magnification. Fig. 1 shows the structure of an anti-slip knob according to the invention. Fig. 2 shows the structure of a non-slip knob located in the border area and as far as within the limits of the structure area according to the invention. Fig. 3 shows a structure which lies outside the structure area according to the invention. Fig. 1 shows that the individual carbide particles are very fine (everywhere less than 5 µm) and still have the irregular shape and
de takkete kanter som kjennetegner meget finmalte karbidpartikler. Prøvestaver av en størrelse på 4,8 x 4,8 x 50 mm av en legering med sammensetningen 12$ nikkel, 4$ molybden, 15$ molybdenkarbid, 3$ wolframkarbid og resten titankarbid hadde en bøyestyrké på 180 kp/mm 2 og en hardhet (HV^Q) på l6l0 kp/mm 2. Til sammenligning skal det nevnes at prøvestaver av den samme legering, men med en struktur som vist på fig. 2, d.v.s. en vesentlig grovere struktur, har en bøyestyrké the jagged edges that characterize very finely ground carbide particles. Test rods of a size of 4.8 x 4.8 x 50 mm of an alloy with the composition 12$ nickel, 4$ molybdenum, 15$ molybdenum carbide, 3$ tungsten carbide and the rest titanium carbide had a bending strength of 180 kp/mm 2 and a hardness (HV^Q) of l6l0 kp/mm 2. For comparison, it should be mentioned that test rods of the same alloy, but with a structure as shown in fig. 2, i.e. a significantly coarser structure, has a bending strength
på 140 kp/mm 2 og en hardhet (HV,-Q) på 1380 kp/mm 2. Fig. 3 viser en legering som i sin struktur er vidtgående forskjéllig fra strukturen ifølge oppfinnelsen. Som følge av diffusjon og samlekrystallisasjon ved manglende overholdelse av de betingelser for bearbeidelse og sintring av pulveret som er nødvendig for oppnåelse av strukturen på fig.. 1, er den på fig. 3 viste struktur allerede blitt så grovkornet at den ligger nær den stabile strukturtilstand. Et slikt hardmetall med samme sammensetning som det på fig. 1 og 2 har bare en bøyestyrké på 100 kp/mm <2> og en hardhet på 1240 kp/mm 2. of 140 kp/mm 2 and a hardness (HV,-Q) of 1380 kp/mm 2. Fig. 3 shows an alloy whose structure is vastly different from the structure according to the invention. As a result of diffusion and collective crystallization by non-compliance with the conditions for processing and sintering the powder which are necessary to obtain the structure in fig. 1, it is in fig. 3 showed the structure has already become so coarse-grained that it is close to the stable structural state. Such a hard metal with the same composition as that in fig. 1 and 2 only have a bending strength of 100 kp/mm <2> and a hardness of 1240 kp/mm 2.
De glidningshindrende knaster ifølge oppfinnelsen har så fremragende mekaniske egenskaper at det hardmetall de er fremstilt av åpenbart også kan anvendes på en rekke andre områder. The non-slip knobs according to the invention have such outstanding mechanical properties that the hard metal they are made from can obviously also be used in a number of other areas.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT725670A AT305057B (en) | 1970-08-10 | 1970-08-10 | Anti-skid studs, in particular for vehicle tires |
Publications (1)
Publication Number | Publication Date |
---|---|
NO127335B true NO127335B (en) | 1973-06-12 |
Family
ID=3594214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO287371A NO127335B (en) | 1970-08-10 | 1971-07-29 |
Country Status (6)
Country | Link |
---|---|
CA (1) | CA929451A (en) |
DE (1) | DE2130911A1 (en) |
FR (1) | FR2104845A6 (en) |
GB (1) | GB1309503A (en) |
NO (1) | NO127335B (en) |
SE (1) | SE358663B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE422550B (en) * | 1978-01-10 | 1982-03-15 | Asea Ab | WHEELS FOR RELAYING VEHICLES |
FR2471294A1 (en) * | 1979-12-10 | 1981-06-19 | Eurotungstene | Hard metal peg for antiskid studs in vehicle tyres - where peg is made of carbide(s) bonded by nickel:molybdenum alloy, so good wear resistance is obtd. at reasonable cost |
-
1971
- 1971-06-22 DE DE19712130911 patent/DE2130911A1/en active Pending
- 1971-07-21 FR FR7126623A patent/FR2104845A6/fr not_active Expired
- 1971-07-22 GB GB3433771A patent/GB1309503A/en not_active Expired
- 1971-07-29 NO NO287371A patent/NO127335B/no unknown
- 1971-08-03 SE SE993471A patent/SE358663B/xx unknown
- 1971-08-09 CA CA120075A patent/CA929451A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1309503A (en) | 1973-03-14 |
CA929451A (en) | 1973-07-03 |
FR2104845A6 (en) | 1972-04-21 |
SE358663B (en) | 1973-08-06 |
DE2130911A1 (en) | 1972-02-17 |
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