Imfucuza Ye-Sintering Evamile Nezimbangela

Ingxenye eyinhloko ye-carbide enosimende i-tungsten carbide powder enobukhulu obuncane bokuqina okuphezulu. I-carbide enosimende iwumkhiqizo wokugcina okhiqizwe nge-powder metallurgy futhi ushiswe esithandweni se-vacuum noma esithandweni sokunciphisa i-hydrogen. Inqubo isebenzisa i-cobalt, i-nickel, noma i-molybdenum njengesibophezelo. I-Sintering yisinyathelo esibucayi kakhulu ku-carbide enosimende. Inqubo ye-sintering iwukushisa impushana ehlangene ezingeni lokushisa elithile, uyigcine isikhathi esithile, bese uyipholisa ukuze uthole into enezici ezidingekayo. Inqubo ye-sintering ye-carbide enosimende iyinkimbinkimbi kakhulu, futhi kulula ukukhiqiza imfucuza e-sintered uma wenza amaphutha athile. Lesi sihloko sizokhuluma ngezinye imfucuza evamile ye-sintering nokuthi yini ebangela udoti.

1. Ukucwecwa

Imfucuza yokuqala evamile ye-sintering iyaxebuka. Ukucwecwa kulapho ingaphezulu le-carbide enosimende livela linemifantu emaphethelweni namagobolondo aguquguqukayo. Ngaphezu kwalokho, ezinye zivela izikhumba ezincane ezizacile njengamazenga ezinhlanzi, imifantu eqhumayo, ngisho nokupondwa. Ukucwenga kubangelwa ikakhulukazi ukuthintana kwe-cobalt ku-compact, bese igesi equkethe i-carbon ibola i-carbon yamahhala kuyo, okuholela ekunciphiseni kwamandla wendawo we-compact, okuholela ekucwebeni.

2. Izimbotshana

Imfucumfucu yesibili evamile kakhulu yizimbotshana ezisobala endaweni ye-carbide enosimende. Izimbobo ezinama-microns angaphezu kuka-40 zibizwa ngokuthi ama-pores. Noma yini engabangela ama-bubbles izobangela ama-pores phezulu. Ukwengeza, lapho kukhona ukungcola emzimbeni we-sintered ongamanziswanga yinsimbi encibilikisiwe noma umzimba we-sintered unesigaba esiqinile esiqinile futhi ukuhlukaniswa kwesigaba soketshezi kungase kubangele izimbotshana.

3. Amabhamuza

Amabhamuza lapho kunezimbobo ngaphakathi kwe-carbide enosimende futhi abangele amaqhubu ebusweni bezingxenye ezihambisanayo. Isizathu esiyinhloko samabhamuza ukuthi umzimba we-sintered unegesi egxilile. Igesi egxilile ngokuvamile ihlanganisa izinhlobo ezimbili.

4. Isakhiwo esingalingani esibangelwa ukuxuba izimpushana ezahlukene.

5. Ukuguquguquka

Ukuma okungavamile komzimba owenziwe nge-sintered kubizwa ngokuthi i-deformation. Izizathu eziyinhloko ze-deformation zihlanganisa: ukusatshalaliswa kokuqina kwama-compacts akufani; umzimba we-sintered untula kakhulu kukhabhoni endaweni; ukulayishwa kwesikebhe akunangqondo, futhi i-backing plate ayilingani.

6. Isikhungo Esimnyama

Indawo evulekile endaweni ephukile ye-alloy ibizwa ngokuthi isikhungo esimnyama. Imbangela yesikhungo esimnyama okuqukethwe kwekhabhoni eningi noma okuqukethwe kwekhabhoni akwanele. Zonke izici ezithinta okuqukethwe kwekhabhoni emzimbeni we-sintered zizothinta isikhungo esimnyama se-carbide.

7. Imifantu

Imifantu iphinde ibe yinto evamile kudoti owenziwe usimende we-carbide sintered. Kunezinhlobo ezimbili zokuqhekeka, enye i-compression crack, enye i-oxidation cracks.

8. Ukushiswa ngokweqile

Uma izinga lokushisa le-sintering liphezulu kakhulu noma isikhathi sokubamba siside kakhulu, umkhiqizo uzoshiswa kakhulu. Ukushiswa ngokweqile komkhiqizo kwenza okusanhlamvu kube mkhulu, ama-pores anda, futhi izakhiwo ze-alloy ziyancipha kakhulu. I-metallic luster yemikhiqizo engashiswanga kahle ayibonakali, futhi idinga ukuxoshwa kabusha kuphela.