Yini i-hardfacing

I-Hardfacing ukufakwa kwezingubo eziwugqinsi zezinto eziqinile, ezingagugi endaweni egugile noma entsha engase iguge.ngokushisela, ukufafaza okushisayo, noma inqubo efanayo. Ukufafaza okushisayo, i-spray-fuse kanye nezinqubo zokushisela ngokuvamile zisetshenziselwa ukufaka isendlalelo esibheke kanzima. Izinto ezisetshenziswayo ezivame ukusetshenziswa zifaka ama-alloys asekelwe ku-cobalt (njenge i-tungsten carbide), ama-alloys asekelwe ku-nickel,i-chromium carbideama-alloys, njll. I-Hardfacing ngezinye izikhathi ilandelwa ukugxiviza okushisayo ukuze kulungiswe kabusha ingxenye noma ukwengeza umbala noma ulwazi lweziyalo engxenyeni. Amafoyili noma amafilimu angasetshenziselwa ukubukeka kwensimbi noma okunye ukuvikela

Ukufafaza okushisayo kukhethwa ezinhlelweni ezidinga ukuhlanekezelwa okuncane kokushisa kwengxenye kanye nokulawulwa okuhle kwenqubo. Izinto ezijwayelekile eziqinile ezifakwe ngokufafaza okushisayo zifaka ama-cermets afana ne-WC-Co nezitsha zobumba ezenziwe nge-alumina. Lezi zinhlobonhlobo zisetshenziselwa ukushuba okungaba ngu-0.3mm.

Izembatho ze-spray-fuse ezibuye zibizwe ngokuthi yizimbotshana zokumbondela ezizishintshayo, ziqale zifakwe endaweni engaphezulu kusetshenziswa inqubo yokufafaza ilangabi bese ihlanganiswa kusetshenziswa ithoshi ye-oxyacetylene noma ikhoyili yokungeniswa kwe-RF. I-coating ehlanganisiwe imanzisa indawo engaphansi ukuze ikhiqize ukunamathela okuhlanganiswe nge-metallurgical ku-substrate futhi engenawo amandla. Kunezinhlobo ezihlukahlukene ze-alloy ezisetshenziswa ngenqubo ye-spray-fuse, ezibaluleke kakhulu zisekelwe ohlelweni lwe-alloy lwe-Ni-Cr-B-Si-C. Kuye ngokubunjwa zincibilika ebangeni lika-980 kuya ku-1200°C. 

I-Weld hard face isetshenziselwa ukufaka izendlalelo eziminyene kakhulu (1 kuya ku-10mm) zezinto ezingagugi ezinamandla amakhulu ebhondi. Kungasetshenziswa amasu okushisela ahlukahlukene, okuhlanganisa igesi ye-metal-inert (MIG), inert ye-tungstenigesi (TIG), i-plasma transferred arc (PTA), i-arc engaphansi kwamanzi (SAW), kanye ne-arc metal manual (MMA). Kungasetshenziswa uhla olubanzi kakhulu lwezinto zokugqoka. Zihlanganisa ama-alloys asekelwe ku-cobalt (tungsten carbide njll.), izinsimbi ze-martensitic nezinesivinini esikhulu, ama-nickel alloys nama-WC-Co cemented carbides. Ngemuva kokufakwa nganoma iyiphi yalezi zinqubo zokushisela ezingenhla, kuvame ukudingekile ukuqeda indawo engaphezulu.

I-Hardfacing ingafakwa ngezindlela ezahlukahlukene zokushisela:

·Ukushisela i-arc yensimbi evikelekile

·Ukushisela i-arc yensimbi yegesi, okuhlanganisa kokubili okuvikelwe ngegesi nokuvuleka kwe-arc

·I-oxyfuel ukushisela

·Icwile emanzinii-arc welding

·Electroslag welding

·I-Plasma idluliselwe i-arc welding, ebizwa nangokuthi i-powder plasma welding

·Ukufafaza okushisayo

·Cold polymer compounds

·Ukufakwa kwe-laser

·Iphuzu eliqinile