Tungsten-cobalt Alloy Hnav-resistant Cov Menyuam Nail PM Sintered Parts

Khoom Taw Qhia

Stellite yog cobalt (Co)-raws li superalloy uas tuaj nyob rau hauv ob lub ntsiab ua ke: (a) tungsten (W) pawg uas muaj Co-cr-Wc. (b) Molybdenum (Mo) pawg uas muaj Co-Cr-Mo-C. Tungsten-cobalt alloy hnav-tiv taus rau cov ntsia hlau PM sintered qhov chaw muaj corrosion kuj zoo heev, oxidation tsis kam, hnav tsis kam, kub tsis kam, thiab tsis tshua muaj hlau nplaum permeability. Cheebtsam ua los ntawm stellite ua haujlwm zoo nyob rau hauv ib puag ncig corrosive heev thiab tswj cov khoom zoo tshaj plaws ntawm qhov kub siab. Cheebtsam ua los ntawm stellite yog dav siv nyob rau hauv cov roj thiab roj tsheb, nuclear zog, ntawv thiab pulp, tshuaj thiab petrochemical, refinery, automotive, aerospace, thiab aviation industries. Vim nws tsis yog-magnetic, anti-corrosion, thiab non-reactive rau lub cev kua. Stellite alloys yog siv rau hauv kev kho mob phais, cov cuab yeej phais, kho hniav thiab pob txha thiab hloov, lub plawv li qub, thiab cov pacemakers. Stellite muaj qhov nyuaj ntawm 32 txog 55 HRC thiab yog cov khoom siv tawv tawv, tab sis nws cov Young modulus yog qis. Kev ua haujlwm ntawm stellite yog qhov nyuaj heev vim lawv cov hardness siab, thiab siab ceev tab sis inhomogeneous: cov qauv molecular thiab thermal conductivity tsawg, stellite yog cais raws li nyuaj rau tshuab xws li titanium alloy s khoom. Inconel, composites, thiab stainless hlau feem ntau, cov khoom siv lub tshuab ua los ntawm stellite yog tsim los ntawm txoj kev tso rau ntawm cov hlau substrate es tsis yog los ntawm cov khoom kim heev stellite rods. Qhov ntxhib nto ntawm deposited stellite yog tiav los ntawm kev sib tsoo es tsis yog ib co lwm economical machining txheej txheem uas yog kim thiab siv sij hawm-siv, ua stellite khoom kim heev. Tsab ntawv xov xwm no qhia txog cov xwm txheej tseem ceeb ntawm stellite rau engineering, qhov tseem ceeb thiab kev siv tshwj xeeb ntawm stellite, nrog rau qhov zoo thiab qhov tsis zoo ntawm kev siv tshuab. Daim ntawv no luv luv tshuaj xyuas cov kev tshawb fawb txog kev lag luam tsim nyog txiav cov kev txiav rau kev txiav cov stellite alloys nrog coated carbide inserts. Daim ntawv no nthuav tawm thiab txheeb xyuas qhov tshwm sim nthuav dav ntawm kev ntxhov siab nyob hauv lub sijhawm ua haujlwm ntawm Stellite alloys. Lub micro-convexity variation ntawm stellite-chrome-cobalt alloy machined nto nyob rau hauv txawv geometric duab tau kawm. Cov txiaj ntsig tau pom tias cov coated carbide inserts ntawm nruab nrab lub qhov ntswg radii ua tau zoo dua nyob rau hauv cov nqe lus ntawm hardness hloov thiab kub tiam, ua tsawg kawg theem transformation los yog txiav nto stellite.

Cov ntawv thov kev lag luam ntawm Stellite Alloys Qhov laj thawj rau kev siv stellite hauv kev lag luam engineering yog los muab kev tiv thaiv corrosion thiab hnav-resistant nto uas yuav pab tiv thaiv kev hnav thiab corrosion ntawm txhua yam khoom. Txawm li cas los xij, cov ntaub ntawv hnav-tiv taus yog yam ntxwv los ntawm kev faib khoom sib xws. Ib tug ntom carbide matrix yog ib txwm nyuaj rau tshuab vim nws cov ntsiab lus carbide siab. Qee zaum qhov kev faib ntawm cemented carbide tsis sib npaug. Tsawg thermal conductivity thiab hardness ntau dua ua rau cov machinability tsis zoo ntawm cov ntaub ntawv no.

Cobalt-based alloys qee zaum tsis yog cov khoom sib nqus tab sis muaj lub zog siab. Paub txog lawv cov khoom siv siab, corrosion, thiab tshav kub tsis kam, cov alloys yog cov khoom siv tsis tau txaus. Cov alloys khaws lawv lub zog zoo rau lub sijhawm ntev, txawm tias qhov kub thiab txias, thiab ua tau zoo nyob rau hauv ib puag ncig corrosive thiab acidic. Raws li tau hais ua ntej, cobalt-raws li alloys muaj kev tiv thaiv zoo heev rau kev degradation nyob rau hauv lub cev dej ib puag ncig, uas ua rau lawv ua tiav daim ntawv thov nyob rau hauv cov txheej txheem kho mob thiab phais implants. Ntau qhov kev kuaj mob tau lees paub tias cov khoom siv cobalt-based yog biocompatible rau kev siv los ua kev phais thiab hloov pob txha. Raws li niaj hnub ntawm nws daim ntawv thov, nws tuaj yeem muab faib ua pawg hauv qab no:

• Hnav-resistant alloys

• Superalloy

• Corrosion Resistant Alloys

Stellite (Stellite 6B) thiab Stellite (Stellite 6K) yog cov hnav-tiv taus alloys uas muaj feem ntau (li 30 feem pua) ntawm Cr thiab txog 65 feem pua ​​​​ntawm Co. Ib feem ntau ntawm Cr yog lub ntsiab carbide-forming tus neeg sawv cev hauv cov txheej txheem solidification. ntawm cov alloy, uas muaj zog heev. Kev hnav zoo heev ntawm cov alloys no yog ntaus nqi rau feem ntau cov cobalt-nplua nuj matrix ntawm carbide nplej tsim. Vim nws zoo heev hnav tsis kam thiab toughness, stellite 6 tau dav siv nyob rau hauv kev tsim cov khoom txiav rau cov khoom sib sib zog nqus drilling xws li mining thiab pob zeb. Crushing yob, cement thiab steel khoom, conveyor systems, chav turbine yaig shields, ib nrab casings, thiab bushings uas tsis tuaj yeem los yog tsis tuaj yeem lubricated zoo. siv 6k. Tsis muaj molybdenum (Mo) nyob rau hauv nws muaj pes tsawg leeg, tsuas yog 30 feem pua ​​ntawm Cr, thiab nws muaj ib tug siab hardness (47 HRC). Nws yog qhov tsim nyog rau kev tsim khoom rau kev txiav cov organic thiab cog cov ntaub ntawv xws li luam yeeb.

Lwm cov hlau, Stellite 3, muaj 3 zaug ntau dua tungsten (W) dua li Stellite 6, 6B, thiab 6K, tsis muaj molybdenum, thiab tsis zoo nyob rau hauv ib puag ncig corrosive li Stellite 6, 6B, thiab 6K, yog li nws tsis pom zoo rau siv hauv qhov xwm txheej no. Tab sis vim muaj cov pa roj carbon ntau dua (C) cov ntsiab lus thiab nce ntim feem ntawm carbides, Stellite 3 muaj 3 mus rau 4 npaug ntawm kev hnav tsis kam ntawm Stellite 6 thiab ob npaug ntawm Stellite 12. Stellite 3 muaj zog dua liab thiab tsis kam rau corrosion thiab hnav zoo li. tag nrho cov stellite alloys. Yog li ntawd, Stellite 3 tau pom zoo rau kev tsim cov pob bearings thiab koob, lub tes tsho thiab bushings, lub rooj zaum valve inserts nyob rau hauv qhov chaw uas tsis yog-corrosive, txiab inserts, burner nozzles, steel zeb qhia rolls, thiab sealing rolls.

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