Gawo la diamondi ndi gawo logwira ntchito la tsamba la diamondi. Mutu wodula wa tsamba la macheka a diamondi umapangidwa ndi diamondi ndi matrix binder. Diamondi ndi chinthu cholimba kwambiri chomwe chimagwira ntchito ngati chodula. The matrix binder imagwira ntchito yokonza diamondi. Amapangidwa ndi ufa wosavuta wachitsulo kapena zitsulo zotayidwa ufa Kuphatikizika, nyimbo zosiyanasiyana zimatchedwa ma formula, ndipo mafomuwa ndi osiyana ndi diamondi malinga ndi ntchito zosiyanasiyana.

1. Kusankhidwa kwa diamondi particle size

Pamene diamondi tinthu kukula coarse ndi limodzi tinthu kukula, macheka tsamba mutu ndi lakuthwa ndi macheka dzuwa ndi mkulu, koma kupinda mphamvu ya diamondi agglomeration amachepetsa; pamene diamondi tinthu kukula bwino kapena coarse ndi zabwino tinthu kukula ndi osakaniza, macheka tsamba mutu ndi mkulu durability, koma zochepa imayenera. Poganizira zomwe zili pamwambazi, ndikofunikira kusankha kukula kwa diamondi ya 50/60 mesh.

2. Kusankhidwa kwa ndende yogawa diamondi

Mkati mwamtundu wina, pamene ndende ya diamondi imasintha kuchokera kumunsi kupita kumtunda, kukhwima ndi kudula bwino kwa tsamba la macheka kumachepa pang'onopang'ono, pamene moyo wautumiki udzatalikira pang'onopang'ono; koma ngati ndendeyo ili yokwera kwambiri, tsamba la macheka limakhala losalala. Ndipo ntchito otsika ndende, coarse tinthu kukula, dzuwa adzakhala bwino. Pogwiritsa ntchito ntchito zosiyanasiyana za gawo lililonse la mutu wodulira panthawi yocheka, magawo osiyanasiyana amagwiritsidwa ntchito (ndiko kuti, ndende yotsika imatha kugwiritsidwa ntchito pakatikati pagawo la magawo atatu kapena kupitilira apo), ndipo poyambira wapakati amapangidwa. wodula mutu panthawi yocheka, yomwe imakhala ndi zotsatira zina. Ndikopindulitsa kuteteza tsamba la macheka kuti lisatembenuke, potero kumapangitsa kuti miyala ikhale yabwino.

3. Kusankha mphamvu ya diamondi

Mphamvu ya diamondi ndichizindikiro chofunikira chowonetsetsa ntchito yodula. Kuchuluka kwamphamvu kumapangitsa kuti kristaloyo ikhale yosavuta kusweka, njere za abrasive zidzapukutidwa pakagwiritsidwa ntchito, ndipo kuthwako kumachepa, zomwe zimapangitsa kuwonongeka kwa zida; pamene mphamvu ya diamondi sikwanira, idzasweka mosavuta pambuyo pokhudzidwa, ndipo zimakhala zovuta kunyamula udindo wolemera wodula. Choncho, mphamvu iyenera kusankhidwa pa 130-140N

4. Kusankha binder gawo

Kugwira ntchito kwa tsamba la macheka sikudalira diamondi yokha, koma pamachitidwe onse amtundu wa tsamba la macheka a diamondi ndi mutu wodula wopangidwa ndi mgwirizano woyenerera wa binder. Kwa zipangizo zamwala zofewa monga marble, makina opangira mutu wodula amafunika kukhala ochepa, ndipo zomangira zamkuwa zingagwiritsidwe ntchito. Komabe, kutentha kwa sintering ya binder-based binder ndi yotsika, mphamvu ndi kuuma ndizochepa, kulimba kumakhala kwakukulu, ndipo mphamvu yomangirira ndi diamondi ndi yochepa. Pamene tungsten carbide (WC) anawonjezera, WC kapena W2C ntchito ngati mafupa zitsulo, ndi mlingo woyenera wa cobalt kusintha mphamvu, kuuma ndi kugwirizana makhalidwe, ndi pang'ono Cu, Sn, Zn ndi zitsulo zina ndi otsika. malo osungunuka ndi kuuma kochepa kumawonjezedwa kuti agwirizane. Kukula kwa tinthu ting'onoting'ono kuyenera kukhala kocheperako kuposa mauna 200, ndipo kukula kwa tinthu tazowonjezera kuyenera kukhala kocheperako kuposa mauna 300.

5. Kusankhidwa kwa ndondomeko ya sintering

Kutentha kumawonjezeka, kuchuluka kwa kachulukidwe ka nyama kumawonjezeka, ndipo mphamvu yosinthika imachulukiranso, ndipo pakuwonjezera nthawi yogwira, mphamvu yosinthika ya nyama yopanda kanthu ndi ma agglomerates a diamondi imayamba kuwonjezeka kenako ndikuchepa. Sintering pa 800 ° C kwa 120s kukwaniritsa zofunikira pakuchita.