I-Carbide Welding Technologies, Iinkqubo, kunye ne-Industrial Applications

I-carbide enesamente, edume ngobulukhuni bayo obukhethekileyo (ukuya kuthi ga kwi-90 HRC) kunye nokumelana nokunxiba, idityaniswe ngokubanzi kwizixhobo zokusika, iibhithi zemigodi, kunye namacandelo achanekileyo ngokusebenzisa i-welding. Nangona kunjalo, i-brittleness yayo ephezulu kunye nokungahambi kakuhle kwe-thermal expansion coefficient (TEC) kunye ne-substrates yensimbi (4-7 × 10⁻⁶ / ° C vs. 11-13 × 10⁻⁶ / ° C) ibeka imingeni ekhethekileyo ye-welding. Eli nqaku lichaza itekhnoloji ye-welding ebalaseleyo, ulawulo lwenkqubo ebalulekileyo, kunye nezicelo zehlabathi zangempela zezinto ze-carbide.

1. Ubuchwephesha beWelding obubalaseleyo kwiCarbide

Iindlela ezimbini zihamba phambili ekudibaniseni i-carbide ye-industrial: i-brazing (eqhelekileyo kodwa ethembekileyo) kunye ne-laser welding (isisombululo esichanekileyo esichanekileyo). Iimpawu zabo eziphambili zithelekiswa ngezantsi:

▶ IBrazing: Ihashe lokuSebenza lokuVelisa izixhobo zeCarbide

I-Brazing ifezekisa ukudibanisa ngokunyibilikisa isinyithi sokuzalisa (indawo encibilikayo ephantsi kune-carbide / intsimbi) ukumanzisa kunye nokuzalisa izithuba ezidibeneyo, ngaphandle kokunyibilika izinto ezisisiseko. Yeyona ndlela iphambili yezixhobo ze-carbide ngenxa yeendleko zayo kunye nokuhambelana nokuveliswa kobuninzi.

Imigaqo-siseko engundoqo kunye noKhetho lwesigcwalisi

I-Bonding Mechanism: Isinyithi esinyibilikisiweyo sokuzalisa singena kwi-micro-gaps ngesenzo se-capillary, senza iibhondi ze-metallurgical kunye ne-carbide (WC-Co) kunye ne-substrates yentsimbi ngokusebenzisa i-element diffusion (umzekelo, i-Cr in filler isabela nge-C kwi-carbide ukwenza i-Cr₃C₂).

I-Filler Alloys:

I-Ni-Cr-Isekelwe: Ikhethwa kwizicelo eziphezulu zokushisa (umzekelo, izixhobo zokugaya), inyibilika kwi-1050-1150 ° C, kwaye inika ukuxhathisa okugqwesileyo kwe-oxidation.

I-Ag-Cu-Isekelwe: Isetyenziselwa izixhobo eziphantsi koxinzelelo (umzekelo, ukufakwa kwe-lathe), inyibilika kwi-650-800 ° C, iyanciphisa umngcipheko wokutshatyalaliswa kwe-thermal.

I-Cu-Based: Ukhetho loqoqosho lwezixhobo zokusika iinjongo eziqhelekileyo, zifuna i-flux ukususa iifilimu ze-oxide.

▶ Ukuwelda ngeLaser: Ukudityaniswa ngokuchanekileyo kwiZixhobo eziSebenza ngokuPhezulu

I-laser welding isebenzisa umqadi ogxininisiweyo (i-1.06μm i-fiber laser ekhethwayo) ukudala amachibi adibeneyo atyhidiweyo, okwenza ukuba amandla aphezulu, adibeneyo aphantsi. Ilungele izixhobo ezincinci kunye neejometri ezinzima.

Izinto eziluncedo kwezobuGcisa ngaphezulu kweBrazing

Impembelelo encinci ye-Thermal: Indawo echaphazelekayo ngubushushu (HAZ)

Ukucutshungulwa ngokukhawuleza: Isantya se-Welding ukuya kwi-50mm / s yokufakwa kwe-carbide, i-3x ngokukhawuleza kune-induction brazing.

I-Filler-Free Option: Ukudibanisa ngokuthe ngqo kumacandelo e-carbide amancinci (umzekelo, i-micro-drills).

2. Imingeni enguNdoqo kunye neZicwangciso zokuNciphisa

Ukusilela kwi-welding ye-Carbide kuqala kubangelwa kuxinzelelo olushiyekileyo kunye nokumanzisa kakubi. 

Izisombululo ekujoliswe kuzo zibalulekile:

▶ Uxinzelelo olushiyekileyo kunye nokuqhekeka

Unobangela Wengcambu: Ukungafani kwe-TEC kubangela ukungafani kwe-thermal contraction ngexesha lokupholisa, ukuvelisa uxinzelelo lwe-tensile kwi-carbide.

Izisombululo:

Sebenzisa i-intermediate buffer layers (umzekelo, i-Ni-Cu alloy) ukufunxa uxinzelelo.

Ukwamkela ukufudumeza / ukupholisa okuhamba ngamanyathelo (izinga le-ramp ≤10 ° C / s) kwi-induction brazing.

I-post-weld tempering kwi-250 ° C kwiiyure ze-2 ukukhulula uxinzelelo nge-30-50%.

▶ Ukungamanzi kakuhle

Unobangela Wengcambu: Amandla aphezulu eCarbide ayamelana nokungeniswa kwesinyithi.

Izisombululo:

Phatha kwangaphambili i-carbide nge-Cr powder ukwenza i-Cr₃C₂ umaleko wokudibanisa.

Sebenzisa i-fluxes esebenzayo (umzekelo, i-borax-based) ukususa iifilimu ze-oxide kwii-substrates zetsimbi.

▶ Ukhukuliseko lweMetali yokuFakela

Unobangela: Ukufudumeza okugqithisileyo kunyibilikisa i-carbide's Co binder, yenze buthathaka ilungu.

Izisombululo:

Nciphisa ixesha le-welding ukuya kwi-

Lawula ubude be-laser pulse (2-5ms) ukuphepha ukuvezwa ixesha elide.

3. Izicelo zoShishino kunye neziFundo zeZibonelelo

I-Carbide welding yenza izixhobo zokusebenza eziphezulu kumacandelo onke:

▶ Ukuvelisa izixhobo zokusika

Ukufakwa kweSixhobo se-CNC: I-induction brazing yokufakwa kwe-WC-Cos ukuya kwimibhobho yentsimbi usebenzisa i-Ni-Cr-B-Si filler (1080 ° C, 45s) ifezekisa i-200MPa amandla adibeneyo-ngokumelana nemithwalo ye-5000rpm yomatshini.

I-Circular Saw Blades: I-laser ye-laser ye-automated (300W fiber laser) yamazinyo e-carbide kwiidiski zetsimbi kunciphisa izinga lokuphuka kwezinyo nge-60% vs.

▶ Ezemigodi & noKwakha

Iibhithi zokugaya i-Rock: I-vacuum brazing yamaqhosha e-carbide kwimizimba yentsimbi (i-Ni-Cr filler, i-1120 ° C) iqinisekisa ukuxhathisa kwimithwalo yempembelelo ye-50MPa; ubomi benkonzo bandiswa nge-2–3x.

▶ Ubunjineli obuchanekileyo

Izixhobo zeMicro-Machining: I-Fiber laser welding ye-0.8mm yeengcebiso ze-carbide kwi-shafts yensimbi engenasici (250W, 15mm / s) igcina ± 0.01mm ukuchaneka kwe-dimensional ye-semiconductor cut wafer.

4. Iindlela zekamva

I-Hybrid Welding: Ukudibanisa i-laser pre-heating kunye ne-induction brazing ukunciphisa ukuqhekeka kwe-carbide kwiindawo ezihlangeneyo.

Uphuhliso lweFiller oluSebenzayo: Izigcwalisi ze-Ni-Cr-Ti ezenza iibhondi ze-TiC ezinamandla kunye ne-carbide, ziphucula ukuqina okudibeneyo nge-30%.

Ukudityaniswa kwe-Automation: Iinkqubo eziqhutywa yi-AI ezinexesha langempela lokujonga i-thermal ukuze kulungiswe iiparitha ze-welding kumabakala aguquguqukayo e-carbide.

Ukuqukumbela

I-Carbide welding ifuna ibhalansi yesayensi yezinto kunye nokulawulwa kwenkqubo-i-brazing igqwesa kwimveliso yobuninzi beendleko, ngelixa i-laser welding ilawula izicelo ezichanekileyo. Ngokujongana noxinzelelo olushiyekileyo kunye nemingeni yokumanzisa, abavelisi banokuvula amandla apheleleyo e-carbide kwiindawo ezinxitywayo eziphezulu, ezixineneyo, ukusuka kumatshini wokwenza izinto ukuya kwimisebenzi yemigodi egqithisileyo.