Hardfacing ke eng

Hardfacing ke ho beoa ha masela a teteaneng a thepa e thata, e sa sebetseng holim'a karolo e tsofetseng kapa e ncha e ka roaloang.ka ho cheselletsa, ho fafatsa ka mocheso, kapa ka mokhoa o ts'oanang. Ho fafatsa ka mocheso, ho fafatsa fuse le lits'ebetso tsa welding hangata li sebelisoa ho sebelisa lera le shebaneng le thata. Lisebelisoa tse sebelisoang hangata li kenyelletsa li-alloys tse thehiloeng ho cobalt (joalo ka tungsten carbide), li-alloys tse thehiloeng ho nickel,chromium carbideli-alloys, etc. Ka linako tse ling Hardfacing e lateloa ke ho hatakela ho chesang ho ntlafatsa karolo kapa ho eketsa lintlha tsa 'mala kapa thuto ho karolo. Li-foil kapa lifilimi li ka sebelisoa bakeng sa ponahalo ea tšepe kapa tšireletso e 'ngoe

Ho fafatsa ka mocheso ho khethoa bakeng sa lits'ebetso tse hlokang ho khopama ho fokolang ha mocheso oa karolo le taolo e ntle ea ts'ebetso. Lisebelisoa tse tloaelehileng tse thata tse behiloeng ke ho fafatsa ka mocheso li kenyelletsa li-cermets tse kang WC-Co le lirafshoa tse thehiloeng ho alumina. Liaparo tsena li sebelisoa ho botenya bo ka bang 0.3mm.

Liaparo tsa "spray-fuse" tse tsejoang hape e le "self-fluxing overlay" li sebelisoa pele holim'a motsoako ho sebelisoa mokhoa oa ho fafatsa lelakabe, ebe li kopanngoa ka toche ea oxyacetylene kapa coil ea induction ea RF. Sekoaelo se kopantsoeng se kolobisa bokaholimo ba substrate ho hlahisa seaparo se kopantsoeng ka metallurgic ho substrate mme ha se na porosity. Ho na le mefuta e fapaneng ea alloy e sebelisoang ka mokhoa oa ho fafatsa-fuse, ea bohlokoa ka ho fetisisa e ipapisitse le sistimi ea alloy ea Ni-Cr-B-Si-C. Ho itšetlehile ka sebopeho, li qhibiliha ka har'a 980 ho ea ho 1200 ° C. 

Weld hard faced e sebelisetsoa ho beha likarolo tse teteaneng haholo (1 ho isa ho 10mm) tsa thepa e sa senyeheng e nang le matla a phahameng a tlamo. Mekhoa e fapaneng ea ho tjheseletsa e ka sebelisoa, ho kenyelletsa le gase ea inert ea tšepe (MIG), inert ea tungstenkhase (TIG), plasma transferred arc (PTA), submerged arc (SAW), le manual metal arc (MMA). Ho ka sebelisoa mefuta e mengata haholo ea lisebelisoa tsa ho roala. Li kenyelletsa li-alloys tse thehiloeng ho cobalt (tungsten carbide joalo-joalo.), litšepe tsa martensitic le lebelo le phahameng, li-alloys tsa nickel le li-carbide tse entsoeng ka samente tsa WC-Co. Ka mor'a ho behoa ke leha e le efe ea mekhoa e ka holimo ea welding, hangata hoa hlokahala ho qeta bokaholimo ba karolo.

Hardfacing e ka kenngoa ka mekhoa e fapaneng ea welding:

·Thepa e sirelelitsoeng ka tšepe ea arc welding

·Welding ea tšepe ea khase, ho kenyeletsoa litšepe tse sirelelitsoeng ka khase le tse bulehileng tsa arc

·Oxyfuel tjheseletsa

·Ka metsingho tjheseletsa arc

·Electroslag welding

·Plasma e fetisetsoa arc welding, eo hape e bitsoang powder plasma welding

·Ho fafatsa ka mocheso

·Metsoako e batang ea polymer

·Ho roala laser

·Hardpoint