Umahluko phakathi kwe-SS304 kunye ne-SS316 yezixhobo

I-SS316 ii-steels ezingenasici zihlala zisetyenziselwa ukurhola kufakwe kufutshane namachibi okanye ulwandle. I-SS304 zezona zinto zixhaphakileyo ngaphakathi okanye ngaphandle.
 
Njengamabanga asisiseko e-American AISI, umahluko phakathi kwe-304 okanye i-316 kunye ne-304L okanye i-316L ngumxholo wekhabhoni.
Uluhlu lwekhabhoni ngama-0.08% ubuninzi ngama-304 kunye nama-316 kunye no-0.030% ubuninzi beentlobo ezingama-304L kunye nama-316L.
Zonke ezinye izinto ziyafana (uluhlu lwe-nickel engama-304 yi-8.00-10.50% kunye ne-304L 8.00-12.00%).
Zimbini ii-steels zase-Europe zohlobo lwe-'304L ', 1.4306 kunye no-1.4307. I-1.4307 lolona hlobo luqhelekileyo lukhona, ngaphandle kweJamani. I-1.4301 (304) kunye ne-1.4307 (304L) zinendawo zecarbon ze-0.07% ubuninzi kunye ne-0.030% ubuninzi, ngokulandelelana. Amanqanaba e-chromium kunye ne-nickel ayafana, i-nickel kuwo omabini amabakala ane-8% ubuncinci. I-1.4306 ibakala laseJamani kwaye ine-10% ubuncinci be-Ni. Oku kunciphisa umxholo we-ferrite wentsimbi kwaye ufumanise ukuba iyimfuneko kwezinye iinkqubo zeekhemikhali.
Amanqanaba aseYurophu kwiindidi ezingama-316 kunye nama-316L, 1.4401 kunye no-1.4404, umdlalo kuzo zonke izinto ezinobubanzi bekhabhoni obuyi-0.07% ubuninzi be-1.4401 kunye ne-0.030% ubuninzi be-1.4404. Kukho iinguqulelo eziphezulu ze-Mo (2.5% ubuncinci be-Ni) ye-316 kunye ne-316L kwinkqubo ye-EN, 1.4436 kunye ne-1.4432 ngokwahlukeneyo. Ukuqhubekeka nokwenza nzima imicimbi, kukho ibanga le-1.4435 eliphakamileyo eMo (2.5% ubuncinci) nakwiNi (12.5% ​​ubuncinci).
 
Iziphumo zekhabhoni kukumelana nokubola
 
Iicarbon esezantsi 'ezahlukeneyo' (316L) zasekwa njengezinye iindlela 'kwimigangatho' (316) kwibakala lekhabhoni ukoyisa umngcipheko we-intercrystalline corrosion (ukubola kwe-weld), eyachongwa njengengxaki kwiintsuku zokuqala zesicelo. ezi steels. Oku kunokubangela ukuba intsimbi igcinwe kubushushu obuphakathi kwama-450 ukuya kuma-850 ° C kangangesithuba semizuzu eliqela, kuxhomekeke kubushushu kwaye emva koko ivezwe kwimeko ezinobundlongondlongo. Umhlwa wenzeka ecaleni kwemida yokutya okuziinkozo.
 
Ukuba inqanaba lekhabhoni lingaphantsi kwe-0,030% ke le intercrystalline corrosion ayenzeki emva kokubhencwa kula maqondo obushushu, ngakumbi kuhlobo lwamaxesha aqhele ukwenzeka kwindawo yobushushu echaphazelekayo kwindawo yeewelds kumacandelo 'esityebileyo' esinyithi.
 
Iziphumo zenqanaba lekhabhoni kwi-weldability
 
Kukho uluvo lokuba iintlobo zekhabhoni ezisezantsi kulula ukuzidibanisa kuneentlobo zekhabhoni esemgangathweni.
 
Kubonakala ngathi akukho sizathu sicacileyo soku kwaye umahluko ngokunokwenzeka unxulunyaniswa namandla asezantsi ohlobo lwekhabhoni esezantsi. Uhlobo lwekhabhoni esezantsi kunokuba lula ukulolonga kunye nefom, enokuthi ichaphazele amanqanaba oxinzelelo lwentsalela olushiye isinyithi emva kokuyila nokulungelelanisa iwelding. Oku kungakhokelela kwiindidi zekhabhoni 'esemgangathweni' ezifuna amandla angaphezulu ukuze zibabambe endaweni xa sele ifakelwe i-welding, ngakumbi utyekelo lokubuyela umva ukuba alubanjwanga ngokufanelekileyo endaweni.
 
Izinto ezisetyenziswayo zewelding zazo zombini ezi ntlobo zisekwe ekwakhiweni kwekhabhoni esezantsi, ukunqanda umngcipheko we-intercrystalline corrosion kwi-weld nugget eqinisiweyo okanye ukusasazeka kwekhabhoni iye kwisinyithi somzali (esijikeleze).
 
Ukuqinisekiswa kabini kwentsimbi yokwenziwa kwekhabhoni ephantsi
 
Iintsimbi eziveliswa ngorhwebo, zisebenzisa iindlela zangoku zokwenza intsimbi, zihlala ziveliswa njengohlobo oluphantsi lwekhabhoni njengakwimeko ngenxa yolawulo oluphuculweyo ekwenzeni izinto zentsimbi zale mihla. Ngenxa yoko iimveliso zentsimbi ezigqityiweyo zihlala zinikezelwa kwintengiso 'ezimbini eziqinisekisiweyo' kuwo omabini amabakala njengoko zinokuthi zisetyenziselwe ukwenza izinto ezichaza nokuba leliphi ibakala, ngaphakathi komgangatho othile.
 
Iindidi ezingama-304
 
I-BS EN 10088-2 1.4301 / 1.4307 kumgangatho waseYurophu.
I-ASTM A240 304 / 304L OKANYE i-ASTM A240 / ASME SA240 304 / 304L kwimigangatho yoxinzelelo lwenqanawa yaseMelika.
Iindidi ezingama-316
 
I-BS EN 10088-2 1.4401 / 1.4404 kumgangatho waseYurophu.
I-ASTM A240 316 / 316L OKANYE i-ASTM A240 / ASME SA240 316 / 316L, ukuya kwimigangatho yoxinzelelo lwenqanawa yaseMelika.

Ixesha lokuposa: Aug-19-2020