Umehluko Phakathi Kwezinto ze-SS304 ne-SS316

Izinsimbi ezingenazinsimbi ze-SS316 zivame ukusetshenziselwa izinsimbi ezifakwe eduze kwamachibi noma izilwandle. I-SS304 yizinto ezivame kakhulu ngaphakathi noma ngaphandle.
 
Njengamabanga ayisisekelo e-American AISI, umehluko osebenzayo phakathi kuka-304 noma u-316 no-304L noma u-316L okuqukethwe kwekhabhoni.
Ububanzi bekhabhoni bungu-0.08% ubukhulu obungu-304 no-316 no-0.030% obukhulu bezinhlobo ezingama-304L nezingama-316L.
Zonke ezinye izigaba zezinto zifana ncamashi (ibanga le-nickel elingu-304 lingu-8.00-10.50% naku-304L 8.00-12.00%).
Kunezinsimbi ezimbili zase-Europe zohlobo lwe-'304L ', i-1.4306 ne-1.4307. I-1.4307 iyinhlobonhlobo ehlinzekwa kakhulu, ngaphandle kweJalimane. I-1.4301 (304) ne-1.4307 (304L) zinamabanga wekhabhoni angama-0.07% aphezulu kanye no-0.030% aphezulu, ngokulandelana. Amabanga we-chromium ne-nickel ayafana, i-nickel kuwo womabili amabanga anezinga elingu-8% ubuncane. I-1.4306 empeleni ibanga laseJalimane futhi ine-Ni engu-10% ubuncane. Lokhu kunciphisa okuqukethwe yensimbi futhi kutholakale kudingekile kwezinye izinqubo zamakhemikhali.
Amamaki aseYurophu ezinhlobo ezingama-316 no-316L, 1.4401 no-1.4404, amesha kuzo zonke izakhi ezinamabanga wekhabhoni angu-0.07% aphezulu ku-1.4401 no-0.030% ubukhulu ku-1.4404. Kukhona nezinguqulo eziphakeme ze-Mo (2.5% ubuncane be-Ni) ze-316 ne-316L ku-EN system, 1.4436 naku-1.4432 ngokulandelana. Ukuqhubeka nokwenza izinto zibe nzima, kukhona nebanga le-1.4435 eliphezulu eMo (2.5% ubuncane) naseNi (12.5% ​​ubuncane).
 
Umphumela wekhabhoni ekumelaneni nokubola
 
Ama-carbon 'variants' aphansi (316L) asungulwa njengezinye izindlela 'zamazinga' (316) ebanga lobubanzi bekhabhoni ukunqoba ubungozi bokubola kwe-intercrystalline (ukubola kwe-weld), okwabonakala njengenkinga ezinsukwini zokuqala zokusetshenziswa lezi zinsimbi. Lokhu kungavela uma insimbi ibanjwe ebangeni lokushisa elingu-450 kuye ku-850 ° C ngezikhathi zemizuzu eminingana, kuya ngethempelesha futhi ngemuva kwalokho livezwe ezindaweni ezinobudlova. Ukugqwala bese kwenzeka eduze kwemingcele yokusanhlamvu.
 
Uma izinga lekhabhoni lingaphansi kuka-0.030% khona-ke lokhu kubola kwe-intercrystalline akwenzeki ngemuva kokuchayeka kula mazinga okushisa, ikakhulukazi ngohlobo lwezikhathi ezijwayele ukuhlangabezana nazo endaweni ethintekayo yokushisa kwama-welds ezingxenyeni zensimbi 'ezijiyile'.
 
Umphumela wezinga lekhabhoni ku-weldability
 
Kukhona umbono wokuthi izinhlobo eziphansi zekhabhoni kulula ukuzishisela kunezinhlobo ezijwayelekile zekhabhoni.
 
Kubukeka sengathi asikho isizathu esicacile salokhu futhi umehluko kungenzeka uhlotshaniswa namandla aphansi ohlobo lwekhabhoni ephansi. Uhlobo lwekhabhoni oluphansi kungenzeka kube lula ukulolonga nokwakheka, nakho okungaphazamisa amazinga okuxineka okusele okushiye insimbi ngemuva kokuthi yakha futhi ilungele ukushisela. Lokhu kungaholela ezinhlotsheni zekhabhoni 'ezijwayelekile' ezidinga amandla athe xaxa ukuze zizibambe lapho sezilungele ukufakelwa izinsimbi, ngokujwayela ukubuyela emuva uma kungabanjwanga kahle endaweni.
 
Izinto ezisebenzisekayo zokushisela zombili izinhlobo zisuselwa ekwakhiweni kwekhabhoni ephansi, ukugwema ingozi yokugqwala kwe-intercrystalline ku-weldug nugget eqinile noma ekusakazweni kwekhabhoni kuyinsimbi yomzali (ezungezile).
 
Ukuqinisekiswa kabili kwezinsimbi zokwakheka kwekhabhoni ephansi
 
Izinsimbi ezikhiqizwayo ezentengiselwano, zisebenzisa izindlela zamanje zokwenza insimbi, zivame ukukhiqizwa njengohlobo lwekhabhoni oluphansi njengendaba ngenxa yokulawulwa okuthuthukile ekwakhiweni kwensimbi kwanamuhla. Ngenxa yalokho imikhiqizo yensimbi eqediwe ivame ukunikezwa emakethe 'okuqinisekisiwe okubili' emabizweni womabili amabanga njengoba engasetshenziselwa ukwenziwa okucacisa noma yiliphi ibanga, ngokwezinga elithile.
 
Izinhlobo ezingama-304
 
I-BS EN 10088-2 1.4301 / 1.4307 iye ejwayelekile laseYurophu.
I-ASTM A240 304 / 304L NOMA i-ASTM A240 / ASME SA240 304 / 304L kumazinga omkhumbi wokucindezela waseMelika.
Izinhlobo ezingama-316
 
I-BS EN 10088-2 1.4401 / 1.4404 iye ejwayelekile laseYurophu.
I-ASTM A240 316 / 316L NOMA i-ASTM A240 / ASME SA240 316 / 316L, kumazinga omkhumbi wokucindezela waseMelika.

Isikhathi Iposi: Aug-19-2020