Inkunkuma yeSintering eqhelekileyo kunye nezizathu

Icandelo eliphambili le-cemented carbide yi-micro-size tungsten carbide powder yobunzima obuphezulu. I-carbide enesamente yimveliso yokugqibela eveliswe ngomgubo wesinyithi kunye ne-sintered kwi-vacuum vacuum okanye kwiziko lokunciphisa i-hydrogen. Inkqubo isebenzisa i-cobalt, i-nickel, okanye i-molybdenum njengesibophelelo. I-Sintering linyathelo elibaluleke kakhulu kwi-carbide enesamente. Inkqubo ye-sintering kukutshisa i-powder compact kwiqondo elithile lobushushu, liyigcine ixesha elithile, kwaye emva koko lipholise phantsi ukuze lifumane into eneempawu ezifunekayo. Inkqubo ye-sintering ye-cemented carbide inzima kakhulu, kwaye kulula ukuvelisa inkunkuma edibeneyo ukuba wenza iimpazamo. Eli nqaku liza kuthetha malunga nenkunkuma eqhelekileyo ye-sintering kwaye yintoni ebangela inkunkuma.

1. Ukuxobula

Inkunkuma yokuqala eqhelekileyo ye-sintering kukuxobula. I-peeling kuxa umphezulu we-carbide ene-cemented ubonakala ngokuqhekeka emaphethelweni kunye namagobolondo alwayo. Ngaphezu koko, ezinye zibonakala izikhumba ezincinci ezibhityileyo njengamaxolo eentlanzi, iintanda ezigqabhukileyo, kunye nokucolwa. I-peeling iyinhloko ngenxa yoqhagamshelwano lwe-cobalt kwi-compact, kwaye i-carbon-containing gas ichitha i-carbon free kuyo, okubangelwa ukuhla kwamandla asekhaya e-compact, okubangelwa ukukhupha.

2. Iintunja

Inkunkuma yesibini ixhaphakileyo yi-sintering pores ebonakalayo kumphezulu we-carbide enesamente. Imingxuma engaphezulu kwe-40 microns ibizwa ngokuba yi-pores. Nantoni na enokubangela amaqamza iya kubangela iipores kumphezulu. Ukongeza, xa kukho ukungcola kumzimba we-sintered ongamanziswanga yintsimbi etyhidiweyo okanye umzimba odibeneyo unesigaba esiqinileyo esiqinileyo kwaye ulwahlulo lwesigaba solwelo lunokubangela iipores.

3. Amaqamza

I-Bubbles xa kukho imingxuma ngaphakathi kwi-carbide ene-cemented kwaye ibangele i-bulges ebusweni beendawo ezihambelanayo. Esona sizathu siphambili samaqamza kukuba umzimba we-sintered unerhasi exineneyo. Igesi egxininisiweyo idla ngokuquka iindidi ezimbini.

4. Isakhiwo esingalinganiyo esibangelwa ukuxuba iipowder ezahlukeneyo.

5. Utshintsho

Ubume obungaqhelekanga bomzimba we-sintered kuthiwa yi-deformation. Izizathu eziphambili ze-deformation ziquka: ukusabalalisa koxinzelelo lwee-compacts akufani; umzimba we-sintered unqongophele kakhulu kwikhabhoni yendawo; ukulayishwa kwesikhephe akunangqiqo, kwaye i-backing plate ayilingani.

6. Iziko eliMnyama

Indawo ekhululekileyo kumphezulu we-alloy fracture ibizwa ngokuba ngumbindi omnyama. Unobangela weziko elimnyama ngumxholo wekhabhoni kakhulu okanye umxholo wekhabhoni awanelanga. Zonke izinto ezichaphazela umxholo wekhabhoni womzimba we-sintered ziya kuchaphazela iziko elimnyama le-carbide.

7. Iintanda

Iintanda zikwayinto eqhelekileyo kwinkunkuma eyenziwe ngesamente ye-carbide sintered. Kukho iintlobo ezimbini zeentanda, enye yi-compression cracks, kwaye enye i-oxidation cracks.

8. Ukutshisa ngaphezulu

Xa ukushisa kwe-sintering kuphezulu kakhulu okanye ixesha lokubamba lide kakhulu, imveliso iya kutshiswa ngokugqithisileyo. Ukutshiswa ngokugqithisileyo kwemveliso kwenza ukuba iinkozo zibe zikhulu, i-pores yanda, kwaye iimpawu ze-alloy ziyancipha kakhulu. I-metallic luster yeemveliso ezingaphantsi kwe-fired ayibonakali, kwaye kufuneka iphinde iphinde ikhutshwe.