Welding izakhiwo ezihlukahlukeneama-alloys ethusi:
1. I-thermal conductivity yethusi ebomvu iphezulu.I-thermal conductivity yethusi ebomvu ekamelweni lokushisa cishe izikhathi ezingu-8 ezinkulu kune-carbon steel.Kunzima ukushisisa endaweni yokushisela ithusi ekushiseni okuncibilikayo.Ngakho-ke, umthombo wokushisa onamandla agxilile kufanele usetshenziswe ngesikhathi sokushisela.Ukuqhekeka kuvame ukuvela lapho ama-alloys ethusi nawethusi eshiselwa.Imifantu itholakala ezindaweni zokushisela, emigqeni ehlanganisiwe nasezindaweni ezithinteke ukushisa.Imifantu ingumonakalo we-intergranular, futhi umbala ocacile we-oxidation ungabonakala kusukela esigabeni esiphambanayo.Ngesikhathi senqubo ye-crystallization yokushisela, landelela i-oksijini ne-copper ifomu i-Cu2O, bese wenza i-eutectic encibilika kancane (α+Cu2O) ene-α yethusi, futhi indawo yayo yokuncibilika ingu-1064°C.
2. Umthofu awuncibiliki ethusi eliqinile, futhi umthofu nethusi kwenza i-eutectic encibilika kancane enephuzu lokuncibilika elingu-326°C.Ngaphansi kwesenzo sokushisela ukucindezeleka kwangaphakathi, ithusi kanye ne-alloy alloy joints at high temperatures form cracks in the fragile parts of the welded joints.Ngaphezu kwalokho, i-hydrogen ku-weld nayo ingabangela imifantu.I-porosity ivame ukuvela ekushiseni kwama-alloys ethusi nethusi.I-porosity ku-copper weld metal ehlanzekile ibangelwa ikakhulukazi igesi ye-hydrogen.Uma i-CO gas incibilika kukhopha elimsulwa, izimbotshana zingase futhi zidalwe umhwamuko wamanzi kanye negesi ye-CO2 ekhiqizwa ukusabela kwe-carbon monoxide nomoya-mpilo.
3. Ukuthambekela kokwakheka kwe-porosity ye-copper alloy welding inkulu kakhulu kuneyethusi elihlanzekile.Ngokuvamile, ama-pores asakazwa phakathi nendawo ye-weld futhi eduze komugqa wokuhlanganisa.Lapho ama-alloys e-copper ne-copper ahlanzekile ashiselwe, izakhiwo zemishini zokuhlanganyela zivame ukuncipha.Enqubweni yokushisela yama-alloys ethusi, i-oxidation yethusi, kanye nokuhwamuka nokushiswa kwezakhi ze-alloy kuzokwenzeka.Iphuzu elincibilikayo eliphansi le-eutectic kanye nokukhubazeka okuhlukahlukene kokushisela kuholela ekunciphiseni amandla, ipulasitiki, ukumelana nokugqwala kanye nokuhamba kukagesi kokuhlangana okushiselwe.
Isikhathi sokuthumela: Jun-14-2022