Hard alloy yog ib qho alloy feem ntau yog tsim los ntawm ib lossis ob peb refractory carbides (xws li tungsten carbide, titanium carbide, thiab lwm yam) hauv cov hmoov, nrog cov hmoov hlau (xws li cobalt, npib tsib xee) ua tus tuav.Nws yog tsim los ntawm cov hmoov metallurgy txheej txheem.Hard alloy feem ntau yog siv rau kev tsim cov cuab yeej siv siab ceev thiab txiav cov cuab yeej rau cov ntaub ntawv nyuaj thiab tawv.Nws kuj tseem ua haujlwm nyob rau hauv kev tsim cov khoom txias ua haujlwm tuag, ntsuas ntsuas qhov tseeb, thiab cov khoom hnav-tiv taus uas tiv taus qhov cuam tshuam thiab kev co.
▌ Cov yam ntxwv ntawm Hard Alloy
(1)High hardness, hnav tsis kam, thiab liab hardness.
Hard alloy qhia txog qhov hardness ntawm 86-93 HRA ntawm chav tsev kub, uas yog sib npaug rau 69-81 HRC.Nws tuav lub siab tawv ntawm qhov kub ntawm 900-1000 ° C thiab muaj qhov hnav zoo heev.Piv nrog rau cov cuab yeej siv ceev ceev, cov hlau tawv tawv ua rau kev txiav ceev uas yog 4-7 zaug siab dua thiab muaj lub neej ntev dua 5-80 zaug.Nws tuaj yeem txiav los ntawm cov ntaub ntawv nyuaj nrog lub hardness txog li 50HRC.
(2)Siab zog thiab siab elastic modulus.
Hard alloy muaj lub siab compressive zog txog li 6000 MPa thiab elastic modulus xws li (4-7) × 10^5 MPa, ob qho tib si siab dua cov hlau ceev.Txawm li cas los xij, nws lub zog flexural yog qhov qis dua, feem ntau yog li ntawm 1000-3000 MPa.
(3)Zoo heev corrosion kuj thiab oxidation kuj.
Hard alloy feem ntau pom zoo tiv thaiv atmospheric corrosion, acids, alkalis, thiab tsis tshua muaj oxidation.
(4)Tsawg coefficient ntawm linear expansion.
Hard alloy tuav ruaj khov zoo thiab qhov ntev thaum ua haujlwm vim nws cov coefficient qis ntawm linear expansion.
(5)Cov khoom zoo li tsis tas yuav tsum tau machining ntxiv lossis regrinding.
Vim nws siab hardness thiab brittleness, hard alloy tsis undergo ntxiv txiav los yog regrinding tom qab hmoov metallurgy txoj kev thiab sintering.Yog tias yuav tsum tau ua cov txheej txheem ntxiv, cov txheej txheem xws li hluav taws xob tawm tshuab, xaim txiav, electrolytic sib tsoo, lossis kev sib tsoo tshwj xeeb nrog cov log sib tsoo.Feem ntau, cov khoom siv tawv tawv ntawm qhov tshwj xeeb yog brazed, sib txuas, lossis mechanically clamped mus rau lub cev cov cuab yeej lossis cov pwm rau kev siv.
▌ Cov Hom Kev Nyuaj Siab
Cov hom tawv tawv feem ntau tau muab faib ua peb pawg raws li muaj pes tsawg leeg thiab kev ua haujlwm zoo: tungsten-cobalt, tungsten-titanium-cobalt, thiab tungsten-titanium-tantalum (niobium) alloys.Feem ntau siv hauv kev tsim khoom yog tungsten-cobalt thiab tungsten-titanium-cobalt nyuaj alloys.
(1)Tungsten-Cobalt Hard Alloy:
Cov khoom tseem ceeb yog tungsten carbide (WC) thiab cobalt.Qib yog qhia los ntawm tus lej "YG", ua raws li feem pua ntawm cov ntsiab lus cobalt.Piv txwv li, YG6 qhia txog tungsten-cobalt hard alloy nrog 6% cobalt cov ntsiab lus thiab 94% tungsten carbide cov ntsiab lus.
(2)Tungsten-Titanium-Cobalt Hard Alloy:
Cov khoom tseem ceeb yog tungsten carbide (WC), titanium carbide (TiC), thiab cobalt.Qib yog qhia los ntawm tus lej "YT", ua raws li feem pua ntawm titanium carbide cov ntsiab lus.Piv txwv li, YT15 qhia txog tungsten-titanium-cobalt hard alloy nrog 15% titanium carbide cov ntsiab lus.
(3)Tungsten-Titanium-Tantalum (Niobium) Hard Alloy:
Hom tawv alloy no tseem hu ua universal hard alloy lossis ntau yam nyuaj alloy.Cov khoom tseem ceeb yog tungsten carbide (WC), titanium carbide (TiC), tantalum carbide (TaC), lossis niobium carbide (NbC), thiab cobalt.Qib yog qhia los ntawm tus lej "YW" (lub npe ntawm "Ying" thiab "Wan," lub ntsiab lus nyuaj thiab thoob plaws hauv Suav), ua raws li tus lej.
▌ Daim ntawv thov ntawm Hard Alloy
(1)Cov cuab yeej txiav:
Hard alloy yog dav siv nyob rau hauv zus tau tej cov cuab yeej cuab tam, xws li tig cov cuab yeej, milling cutters, planer hniav, xyaum, thiab lwm yam , cam khwb cia tooj dag, thiab composite ntoo.Tungsten-titanium-cobalt nyuaj alloys yog tsim rau ntev nti machining hlau thiab lwm yam ferrous hlau.Ntawm cov alloys, cov uas muaj cov ntsiab lus cobalt ntau dua yog tsim rau kev ua haujlwm ntxhib, thaum cov ntsiab lus qis cobalt yog tsim rau kev ua tiav.Universal nyuaj alloys muaj lub neej ntev dua lub cuab yeej thaum machining nyuaj-rau-txiav cov ntaub ntawv zoo li stainless hlau.
(2)Cov khoom siv pwm:
Hard alloy feem ntau yog siv los ua cov khoom siv txias txias tuag, txias stamping tuag, txias extrusion tuag, thiab txias taub hau tuag.
Hard alloy txias taub hau tuag yog raug hnav nyob rau hauv kev cuam tshuam los yog muaj zog tej yam kev mob.Cov khoom tseem ceeb uas yuav tsum tau muaj yog qhov zoo ntawm qhov toughness, tawg toughness, qaug zog lub zog, khoov lub zog, thiab zoo heev hnav tsis kam.Feem ntau, nruab nrab mus rau siab cobalt cov ntsiab lus thiab nruab nrab rau coarse-grained alloys raug xaiv.Cov qhab nia muaj xws li YG15C.
Feem ntau, muaj kev sib pauv ntawm kev hnav tsis kam thiab toughness hauv cov ntaub ntawv nyuaj alloy.Kev txhim kho kev hnav tsis kam yuav ua rau txo qis, thaum txhim kho toughness yuav ua rau txo qis.
Yog tias cov npe xaiv tau yooj yim los tsim cov khoom tawg thaum ntxov thiab kev puas tsuaj hauv kev siv, nws yog qhov tsim nyog los xaiv lub hom muaj zog dua;Yog tias lub npe xaiv tau yooj yim los tsim kev hnav thaum ntxov thiab kev puas tsuaj hauv kev siv, nws yog qhov tsim nyog los xaiv lub hom uas muaj zog dua thiab hnav zoo dua.Cov qib hauv qab no: YG15C, YG18C, YG20C, YL60, YG22C, YG25C los ntawm sab laug mus rau sab xis, lub hardness yog txo, hnav tsis kam yog txo, lub toughness yog txhim kho;Ntawm qhov tsis sib xws, qhov sib txawv yog qhov tseeb.
(3) Kev ntsuas cov cuab yeej thiab qhov hnav-tiv taus
Tungsten carbide yog siv rau abrasive nto inlays thiab qhov chaw ntawm kev ntsuas cov cuab yeej, precision bearings ntawm kev sib tsoo tshuab, cov lus qhia thiab cov tuav tuav ntawm centerless sib tsoo cov cav tov, thiab hnav-resistant qhov chaw xws li tshuab dhos chaw.
Post lub sij hawm: Aug-02-2023
