Yintoni i-hardfacing

Ukufakwa kokuqina kukubekwa kweengubo ezishinyeneyo zezinto eziqinileyo, ezikwaziyo ukunxitywa kwindawo egugileyo okanye entsha enokunxitywa.nge welding, ukutshiza thermal, okanye inkqubo efanayo. Ukutshiza nge-thermal, i-spray-fuse kunye neenkqubo ze-welding zisetyenziselwa ngokubanzi ukusebenzisa i-hard-face layer. Izinto ezisetyenziswa ngokuqhelekileyo ziquka i-cobalt-based alloys (efana ne tungsten carbide), iialloyi ezisekwe kwi-nickel,chromium carbideialloyi, njl. I-Hardfacing ngamanye amaxesha ilandelwa yi-stamping eshushu ukucoca kwakhona inxalenye okanye ukongeza umbala okanye ulwazi lomyalelo kwindawo. Iifoyile okanye iifilimu zingasetyenziselwa ukubukeka kwesinyithi okanye olunye ukhuselo

Ukutshiza kwe-thermal kukhethwa kwizicelo ezifuna ukuphazamiseka okuncinci kwe-thermal yecandelo kunye nokulawulwa kwenkqubo efanelekileyo. Iimathiriyeli eziqhelekileyo zokuqina ezifakwe ngokutshizwa ngokushushu zibandakanya iicermets ezifana ne-WC-Co kunye neeseramikhi ezisekwe kwi-alumina. Ezi zogquma zisetyenziselwa ukutyeba malunga ne-0.3mm.

Iingubo zokwaleka ze-spray-fuse ezikwabizwa ngokuba zii-self-fluxing overlay coil, ziqala zigalelwe kumphezulu wecandelo kusetyenziswa inkqubo yokutshiza idangatye emva koko zidityaniswe kusetyenziswa itotshi ye-oxyacetylene okanye i-coil induction ye-RF. I-coating edibeneyo imanzisa umphezulu we-substrate ukuvelisa i-coating edityaniswe ngesinyithi kwi-substrate kwaye ayinayo i-porosity. Kukho iintlobo ezahlukeneyo ze-alloy ezisetyenzisiweyo kunye nenkqubo ye-spray-fuse, eyona nto ibalulekileyo isekelwe kwinkqubo ye-alloy ye-Ni-Cr-B-Si-C. Ngokuxhomekeke ekubunjweni kwazo zinyibilika kuluhlu lwama-980 ukuya kwi-1200°C. 

I-Weld hard face isetyenziselwa ukufaka idiphozithi engqindilili kakhulu (1 ukuya kwi-10mm) eshinyeneyo yemathiriyeli engagugiyo enamandla amakhulu ebhondi. Ubuchule bokuwelda bunokusetyenziswa, kubandakanywa igesi ye-metal-inert (MIG), inert ye-tungstenigesi (TIG), i-plasma idluliselwe i-arc (PTA), i-arc ephantsi kwamanzi (SAW), kunye ne-arc yensimbi ye-manual (MMA). Uluhlu olubanzi kakhulu lwezixhobo zokugquma lunokusetyenziswa. Ziquka i-cobalt-based alloys (tungsten carbide njl.), i-martensitic kunye ne-high-speed steels, i-nickel alloys kunye ne-WC-Co cemented carbides. Emva kokufakwa kuyo nayiphi na inkqubo ye-welding engentla, kudla ngokuyimfuneko ukugqiba indawo yecandelo.

I-Hardfacing inokufakwa ngeendlela ezahlukeneyo ze-welding:

·Ukuwelda kwearc yentsimbi ekhuselweyo

·Ukuwelda kwe-arc yentsimbi yegesi, kubandakanywa zombini igesi ekhuselweyo kunye ne-arc evulekileyo yokuwelda

·I-oxyfuel ukuwelda

·Ukuntywila emanziniwelding arc

·Electroslag welding

·I-Plasma idluliselwe i-arc welding, ikwabizwa ngokuba yi powder plasma welding

·Ukutshiza nge-thermal

·Iikhompawundi zepolymer ezibandayo

·Ukufakwa kweLaser

·Inqaku elinzima