Sidee loo gooyaa usha Tungsten Carbide?

Waxaan ognahay in adkaanta qalabka qalabka laftiisa ay tahay inuu ka sarreeyo adkaanta qaybta shaqada si loo farsameeyo. Adkeydka Rockwell ee karbidhida sibidhka ayaa guud ahaan ku dhow HRA78 ilaa HRA90. Haddii aad rabto inaad dhaliso ama aad jarto ulaha carbide tungsten, 4ta dariiqo ee soo socda ayaa shaqayn kara, kuwaas oo ah shiididda giraangiraha naaxinta, mashiinnada walxaha aad u adag, mashiinnada elektrolytic-ka (ECM), iyo mishiinada dheecaanka korontada (EDM).

1. Usha kaarbiide oo maran ku jar shiididda giraangiraha

Hadda wixii ka dambeeya, agabka farsamayn kara meelaha bannaan ee carbide waxay inta badan tixraacaan poly-crystalline cubic boron nitride (PCBN) iyo poly-crystalline diamond (PCD).

Qalabka ugu muhiimsan ee giraangiraha shiida waa carbide silicon cagaaran iyo dheeman. Tan iyo markii la shiidi karo carbide silikoon ay dhalin doonto cadaadis kulayl ka badan xadka xoogga carbide sibidhka, dildilaaca dusha wax badan dhacaan, taas oo ka dhigaysa silikon carbide aan doorasho ku habboon in la sameeyo dusha la damaanad qaadi karo.

In kasta oo giraangiraha PCD-du uu yahay mid u qalma in uu dhammaystiro dhammaan hawlaha laga bilaabo roughing ilaa dhammaystirka meelaha bannaan ee carbide, si loo yareeyo luminta giraangiraha shiidada, meelaha bannaan ee carbide waxa lagu sii habayn doonaa habka mishiinka koronto, ka dibna samee dhammayn iyo ganaax- dhammayn by shiidi giraangiraha ugu dambeyntii.

2.  gooy baararka karbidhida adigoo shidin oo leexanaya

Qalabka CBN iyo PCBN, oo loogu talagalay hab lagu gooyo biraha madow ee adag, sida birta adag iyo birta (birta). Boron nitrite wuxuu awood u leeyahay inuu u adkaysto saameynta heerkulka sare (oo ka sarreeya 1000 darajo) oo ku xajiyo adkaanta 8000HV. Hantidaani waxay ka dhigaysaa mid la mid ah farsamaynta meelaha bannaan ee carbide, gaar ahaan qaybaha qaab dhismeedka oo ay ka kooban yihiin xudunta carbide iyo birta birta ah ee hoos yimaada faragelinta ku habboon.

Si kastaba ha ahaatee, marka qallafsanaanta qaybaha karbidhida sibidhka ay ka sarreeyaan HRA90, gebi ahaanba ka baxsan boron nitrite's league si loo gooyo, looma baahna in lagu adkaysto qalabka PCBN iyo CBN. kaliya waxaan u jeesan karnaa gooyaha PCD dheeman sida beddelka xaaladan.

Wali ma lumin karno faa'iido darrada PCD-da, awood la'aanta inay hesho cidhifyo fiiqan iyo dhibka in lagu sameeyo chipbreakers. Sidaa darteed, PCD waxa loo isticmaali karaa oo kaliya goynta ganaaxa biraha aan birta ahayn iyo kuwa aan biraha ahayn, laakiin ma gaadhi karaan muraayad-joojin saxan oo saxan oo bannaan oo carbide ah, ugu yaraan weli.

3. Mashiinnada Korontada (ECM)

Ka-hortagga Electrolytic waa habaynta qaybaha iyadoo la raacayo mabda'a ah in carbide lagu milmi karo korantada (NaOH). Waxay hubisaa in dusha sare ee shaqada karbidhidu aanu kululayn. Xaqiiqdu waxay tahay in xawaaraha habaynta ECM iyo tayada habaynta ay ka madax banaan yihiin sifooyinka jidheed ee walaxda la farsamaynayo.

4. Mashiinka daadinta korantada (EDM)

Mabda'a EDM wuxuu ku salaysan yahay ifafaale daxalka korantada u dhexeeya qalabka iyo workpiece (electrodes togan iyo taban) inta lagu guda jiro dheecaanka garaaca wadnaha si meesha looga saaro qaybo carbide xad-dhaaf ah si loo gaaro shuruudaha processing ee la sii go'aamiyay ee cabbirka, qaabka iyo tayada dusha ee workpiece. . Electrodes copper-tungsten iyo copper-silver electrodes oo kaliya ayaa farsamayn kara meelaha banaan ee karbidhida ah.

Marka la soo koobo, EDM ma isticmaasho tamarta farsamada, kuma xirna jarida ciidamada si ay uga saarto birta, laakiin waxay si toos ah u isticmaashaa tamarta korantada iyo kulaylka si ay uga saarto qaybta carbide.