Momwe Cemented Carbide imapangidwira Kodi njira zake zopangira ndi chiyani

Monga dzina la mafakitale a mano carbide, ambiri mwa omwe adagwiritsa ntchito sadziwa momwe carbide imapangidwira komanso kusiyana kotani pakupanga kwake, makamaka, kupanga carbide kumagwirizana ndi kugwiritsa ntchito chilengedwe.Mwachitsanzo, carbide ya migodi, carbide pobowola miyala, carbidezida zotembenuza, ndi zina zonse zimachokera ku ntchito zachilengedwe.Palinso Mwachitsanzo dzimbiri zosagwira carbide ndi zina zotero.
Kodi Cemented Carbide imapangidwa bwanji?Kodi kupanga kwake ndi kotani?
Njira yopangira simenti ya carbide nthawi zambiri imakhala motere: zopangira zitsulo zolimba (tungsten carbide, tantalum carbide, etc.), zitsulo zomangira (cobalt ufa kapena faifi tambala) ndi zowonjezera pang'ono (stearic acid kapena esomin) zimasakanizidwa ndipo pansi mu hexane akupera sing'anga, ndi slurry wa sera wa parafini amawonjezedwa, ndiye vakuyumu zouma (kapena utsi zouma), sieved, granulated, ndi kupanga blended zinthu;zinthu zosakanikirana zimadziwika ndi zoyenerera, ndipo zitatha kulondola Zinthu zosakanikirana zimazindikiridwa ndi zoyenerera, kenako zimakanikizidwa kuti mupange billet yosindikizira kwambiri;Billet yopanikizidwa imayikidwa ndi vacuum dewaxing kapena sintering yochepa kuti ipangesimenti carbide.
Sintering mfundo

The vacuum sintering ndondomeko ikuchitika ndi Kutentha pansi pa vacuum mikhalidwe, amene amathandiza kuchotsa zonyansa, kukonza chiyero cha sintering mlengalenga, kusintha wettability wa kugwirizana gawo ndi kulimbikitsa anachita.Billet yopanikizidwa imatenthedwa mu vacuum sintering atmosphere, ndipo pamene kutentha kumakwera ndikufika kutentha kwa evaporation, kumatuluka mu billet yosindikizidwa ndikusungidwa kwa nthawi yokwanira pa kupanikizika pang'ono kwa nthunzi ya parafini yocheperapo kutentha, ndi parafini. imatulutsidwa mu billet * yopanikizidwa ndikuchira, ndipo billet yopanikizidwa imayeretsedwa.Pamene kutentha kumawonjezeka kwambiri, billet imachotsedwa ndi kuyeretsedwanso, ndipo sintering yolimba imayamba.Mu olimba gawo sintering ndondomeko, maatomu (kapena mamolekyu) wa chigawo chilichonse mu sintered thupi diffused, tinthu kukhudzana pamwamba kumawonjezeka, mtunda pakati pa particles amachepetsa, sintered thupi limachepa ndi kulimbikitsidwa.Kutentha kukakhala pafupi ndi malo osungunuka a gawo lomangika, gawo lomangika limayamba kuyenda kwa pulasitiki, ndipo kutentha kwamadzimadzi kukafika, thupi la sintered limapanga gawo lamadzimadzi ndipo sintering yamadzimadzi imachitika.

Mu madzi gawo sintering ndondomeko, madzi gawo wosanjikiza limapezeka pa carbide pamwamba, ndicarbideTinthu tating'onoting'ono timasungunuka mu gawo lolumikizana ndi kufalikira kuti apange eutectic, ndipo tinthu tating'onoting'ono ta carbide timapanganso ndikukula kukula kudzera mu gawo lamadzimadzi, kotero kuti tinthu tating'ono ta carbide timalumikizana kwambiri, ndipo thupi la sintered limacheperachepera ndikuchulukana mwachangu.Thupi la sintered limacheperachepera komanso kulimba kwambiri.Zimachitikira pa kutentha kwakukulu kuposa kutentha kwa sintering kwa gawo lamadzimadzi kwa kanthawi kuti alole kuti sintering ipitirire mokwanira, kenako itakhazikika.

Panthawi yonseyi, thupi lopangidwa ndi sintered limakhala lokhazikika mpaka lopanda porosity, ndipo mndandanda wa zotsatira za physicochemical ndi kusintha kwa bungwe zimapangidwa, zomwe zimapangitsa kuti pakhale carbide wandiweyani, wopangidwa ndi simenti ndi mankhwala enaake, thupi ndi makina, ndi dongosolo la bungwe.