Kev txhim kho thiab kev sib tw ntawm Ceramic Inserts Materials

Kev tsim kho thiab kev sib txawv ntawm cov ntaub ntawv ceramic hniav

Nyob rau hauv machining, lub cuab tam yeej ib txwm raug hu ua "industrially ua cov hniav", thiab txiav kev ua tau zoo ntawm cov cuab yeej cuab tam yog ib tug ntawm cov tseem ceeb yam tseem ceeb txiav txim nws cov efficiency ntau lawm, ntau lawm nqi thiab ua zoo. Yog li, qhov kev xaiv raug ntawm cov cuab yeej txiav yog qhov tseem ceeb, cov riam ceramic, nrog rau lawv cov cua sov zoo heev, hnav tsis kam thiab tshuaj lom neeg ruaj khov, qhia qhov zoo uas cov cuab yeej tsoos tsis tuaj yeem sib xws hauv kev kub ceev txiav thiab txiav cov ntaub ntawv nyuaj rau lub tshuab, thiab cov ntaub ntawv tseem ceeb ntawm cov riam ceramic yog Al thiab Si. Cov ntsiab lus nplua nuj nyob rau hauv lub ntiaj teb crust tuaj yeem hais tias yog inexhaustible thiab inexhaustible. Yog li ntawd, daim ntawv thov kev cia siab ntawm cov cuab yeej ceramic tshiab yog dav heev.

Ua ntej, hom khoom siv ceramic

Kev nce qib ntawm cov khoom siv ceramic yog tsom rau kev txhim kho kev ua haujlwm ntawm cov khoom siv niaj hnub ceramic, refining nplej, tivthaiv compounding, txheej, txhim kho sintering txheej txheem thiab tsim cov khoom tshiab, thiaj li yuav tau txais kev kub siab, hnav tsis kam thiab tsis kam. Kev ua haujlwm zoo heev chipping thiab tuaj yeem ua tau raws li qhov xav tau ntawm high-speed precision machining. Henan lub koom haum ntawm Superhard Materials tuaj yeem faib cov khoom siv ceramic rau hauv peb pawg: alumina, silicon nitride thiab boron nitride (cov cuab yeej cubic boron nitride). Nyob rau hauv lub tshav pob ntawm cov hlau txiav, alumina ceramic hniav thiab silicon nitride ceramic hniav yog sib sau ua ke hu ua ceramic hniav; Nyob rau hauv cov ntaub ntawv inorganic non-metallic, cubic boron nitride cov ntaub ntawv muaj nyob rau hauv ib chav loj ntawm cov ntaub ntawv ceramic. Cov hauv qab no yog cov yam ntxwv ntawm peb hom ceramics.

(1) Alumina (Al2O3)-raws li ceramic: Ni, Co, W, los yog lwm yam yog ntxiv raws li ib tug binder hlau rau cov carbide-raws li ceramic, thiab lub zog sib txuas ntawm alumina thiab carbide tuaj yeem txhim kho. Nws muaj qhov zoo hnav tsis kam thiab kub tsis kam, thiab nws qhov kub thiab txias tshuaj stability tsis yooj yim rau interdif los yog tshuaj tiv thaiv nrog hlau. Yog li ntawd, alumina-based ceramic cutters muaj cov ntawv thov dav tshaj plaws, haum rau cov hlau thiab cam khwb cia hlau. High-speed machining ntawm nws cov alloys; vim qhov kev txhim kho thermal poob siab tsis kam, nws kuj tuaj yeem siv rau milling lossis npaj nyob rau hauv kev cuam tshuam tej yam kev mob, tab sis nws tsis haum rau kev ua cov txhuas alloys, titanium alloys thiab niobium alloys, txwv tsis pub nws yog nquag siv tshuaj.

(2) Silicon nitride (Si3N4)-raws li ceramic cutter: Nws yog ceramic ua los ntawm kev ntxiv cov nyiaj tsim nyog ntawm cov hlau carbide thiab cov hlau ntxiv dag zog rau cov khoom siv silicon nitride matrix, thiab siv cov khoom sib xyaw ua kom muaj zog (tseem hu ua dispersion strengthening effect). Nws yog tus cwj pwm los ntawm kev ua haujlwm siab, zoo hnav tsis kam, zoo kub tsis kam thiab oxidation tsis kam, thiab tshuaj lom neeg cov tshuaj tiv thaiv ntawm silicon nitride thiab carbon thiab hlau ntsiab yog me me, thiab cov kev sib txhuam tseem tsawg. Haum rau kev ua tiav, semi-finishing, xov lossis semi-finishing.

(3) Boron nitride ceramic (cubic boron nitride cutter): siab hardness, hnav tsis kam, kub tsis kam, zoo thermal stability, zoo thermal conductivity, tsis tshua muaj kev sib txhuam coefficient, thiab me me coefficient ntawm linear expansion. Piv txwv li, Hualing cubic boron nitride cuab yeej BN-S20 qib yog siv rau roughing hardened hlau, BN-H10 qib yog siv rau kev kub ceev xov hardened steel, BN-K1 qib yog ua tiav high hardness cam khwb cia hlau, BN-S30 qib high speed txiav tshauv cam khwb cia hlau yog ntau yig tshaj tej hub inserts.

Qhov thib ob, cov yam ntxwv ntawm cov cuab yeej ceramic

Cov yam ntxwv ntawm cov cuab yeej ceramic: (1) zoo hnav tsis kam; (2) kub tsis kam, zoo liab hardness; (3) cov cuab yeej siv tau ntev yog ob peb zaug lossis ntau zaus ntau dua li cov cuab yeej siv ib txwm siv, txo cov cuab yeej hloov pauv thaum ua haujlwm, ua kom cov khoom me me thiab siab precision ntawm cov khoom ua haujlwm; (4) tsis tsuas yog siv tau rau roughing thiab xov ntawm high-hardness cov ntaub ntawv, tab sis kuj rau machining nrog loj tej yam xws li milling, npaj, interrupted txiav thiab dawb paug roughing; (5) Thaum txiav cov hniav ceramic, kev sib txhuam nrog cov hlau me me, kev txiav tsis yooj yim rau kev sib txuas nrog cov hniav, cov ntug tsim tsis yooj yim tshwm sim, thiab kev kub ceev txiav tuaj yeem ua tau.

Piv nrog cov cemented carbide inserts, ceramic inserts tuaj yeem tiv taus qhov kub thiab txias ntawm 2000 ° C, thaum cov alloys nyuaj ua mos ntawm 800 ° C; yog li cov cuab yeej ceramic muaj qhov kub ntawm cov tshuaj ruaj khov thiab tuaj yeem txiav ntawm qhov kub ceev, tab sis qhov tsis zoo yog ceramic inserts. Lub zog thiab toughness yog tsawg thiab yooj yim tawg. Tom qab ntawd, boron nitride ceramics (tom qab no hu ua cubic boron nitride cov cuab yeej) tau qhia, uas yog siv los tig, milling, thiab tho txawv superhard cov ntaub ntawv. Lub hardness ntawm cubic boron nitride cutters yog ntau dua li ntawm ceramic inserts. Vim nws cov hardness siab, nws tseem hu ua superhard khoom nrog pob zeb diamond. Nws yog feem ntau siv los ua cov ntaub ntawv nrog hardness siab dua HRC48. Nws muaj qhov kub thiab txias hardness - txog li 2000 ° C, txawm hais tias nws yog nkig ntau dua li cov cemented carbide hniav, tab sis tau txhim kho kev cuam tshuam lub zog thiab crush kuj piv rau alumina ceramic cov cuab yeej. Tsis tas li ntawd, qee qhov tshwj xeeb cubic boron nitride cov cuab yeej (xws li Huachao Super Hard BN-K1 thiab BN-S20) tuaj yeem tiv taus cov nti ntawm cov khoom siv ntxhib thiab tuaj yeem tiv taus qhov cuam tshuam ntawm kev sib tshuam machining thiab ua tiav. Kev hnav thiab txiav cov cua sov, cov yam ntxwv no tuaj yeem ua tau raws li kev ua haujlwm nyuaj ntawm cov hlau tawv tawv thiab siab tawv cam khwb cia hlau nrog cubic boron nitride cov cuab yeej.