Izinyathelo Eziyisishiyagalombili Zokushisela Insimbi Engagqwali

1. Insimbi engagqwali ye-Chromium inokumelana nokugqwala okuthile (ama-oxidizing acid, ama-organic acid, i-cavitation), ukumelana nokushisa, nokumelana nokugqoka. Imvamisa isetshenziselwa izinto zokwakha ezifana nezitshalo zamandla, amakhemikhali, kanye ne-petroleum. Insimbi engagqwali ye-Chromium inokushisela okubi, futhi kufanele kuqashelwe izinqubo zokushisela, izimo zokwelashwa kokushisa, njll.

2. I-Chromium 13 insimbi engagqwali inokuqina okuphezulu kokushisela futhi ijwayele ukuqhekeka. Uma uhlobo olufanayo lwe-chromium insimbi engagqwali induku yokushisela (G202, G207) isetshenziselwa ukushisela, ukushisa kuqala ku-300 ℃ noma ngaphezulu kanye nokwelashwa okupholile okunensayo okungaba ngu-700 ℃ ngemva kokushisela kufanele kwenziwe. Uma izingxenye ezishiselwe zingakwazi ukwelashwa ngokushisisa kwe-post weld, izinduku zokushisela zensimbi ye-chromium nickel (A107, A207) kufanele zisetshenziswe.

3. I-Chromium 17 insimbi engagqwali inokushisela okungcono kune-chromium 13 yensimbi engagqwali ngokwengeza izakhi ezifanele zokuzinzisa ezifana ne-Ti, Nb, Mo, njll. ukuze kuthuthukiswe ukumelana nokugqwala nokushisela. Uma usebenzisa uhlobo olufanayo lwezinduku zokushisela insimbi engagqwali ye-chromium (G302, G307), ukushisa kuqala ku-200 ℃ noma ngaphezulu kanye nokwelashwa kokushisisa okungaba ngu-800 ℃ ngemva kokushisela kufanele kwenziwe. Uma izingxenye ezishiselwe zingakwazi ukwelashwa ngokushisa, izinduku zokushisela zensimbi ye-chromium nickel (A107, A207) kufanele zisetshenziswe.

Ngesikhathi sokushiselwa kwensimbi engagqwali ye-chromium nickel, ukushisa okuphindaphindiwe kunganciphisa ama-carbides, kunciphise ukumelana nokugqwala kwawo kanye nezakhiwo zemishini.

5. I-Chromium nickel yensimbi engagqwali izinduku zokushisela zinokumelana nokugqwala okuhle nokumelana ne-oxidation, futhi zisetshenziswa kakhulu ekwenzeni amakhemikhali, umanyolo, uphethiloli, kanye nokukhiqizwa kwemishini yezokwelapha.

6. I-Chromium nickel yensimbi engenasici inohlobo lwe-titanium calcium kanye nohlobo lwe-hydrogen oluphansi. Uhlobo lwe-Titanium calcium lungasetshenziselwa kokubili ukushisela i-AC ne-DC, kodwa ukujula kokuncibilika akujulile ngesikhathi sokushisela i-AC futhi kujwayele ukubabomvu. Ngakho-ke, amandla kagesi e-DC kufanele asetshenziswe ngangokunokwenzeka. Ububanzi obungu-4.0 nangaphansi bungasetshenziswa kukho konke ukushisela izikhundla, kuyilapho ububanzi obungu-5.0 nangaphezulu bungasetshenziswa ukushisela okuyisicaba nokushisela imicu.

7. Izinduku zokushisela kufanele zigcinwe zomile ngesikhathi sokusetshenziswa. Uhlobo lwe-calcium ye-Titanium kufanele lomiswe ku-150 ℃ ihora elingu-1, futhi uhlobo oluphansi lwe-hydrogen kufanele lomiswe ku-200-250 ℃ ihora elingu-1 (ukoma okuphindaphindiwe akuvunyelwe, ngaphandle kwalokho ukunamathela kujwayele ukuqhekeka nokuxebuka), ukuvimbela ukumboza. wenduku yokushisela kusuka kumafutha okunamathela nokunye ukungcola, ukuze ungakhulisi okuqukethwe kwekhabhoni ye-weld futhi uthinte ikhwalithi yengxenye ehlanganisiwe.

Ukuze uvimbele ukugqwala kwe-inter-granular okubangelwa ukushisa, i-welding current akufanele ibe phezulu kakhulu, cishe ngo-20% ngaphansi kwaleyo ye-carbon steel welding rods. I-arc akufanele ibe yinde kakhulu, futhi i-inter-layer kufanele ipholile ngokushesha. Kukhethwa ubuhlalu be-weld emincane.