Ukuxhatshazwa kwe-corrosion yensimbi engenasici kuxhomekeke kwi-chromium, kodwa ngenxa yokuba i-chromium yenye yezinto zentsimbi, iindlela zokukhusela ziyahluka.Xa ukongezwa kwe-chromium kufikelela kwi-10.5%, ukuxhathisa kwe-atmospheric corrosion yensimbi kwandisa kakhulu, kodwa xa umxholo we-chromium uphezulu, nangona ukuxhathisa kwe-corrosion kusenokuphuculwa, akubonakali.Isizathu sesokuba intsimbi exutywe nechromium ilutshintsha uhlobo lwe-oksidi yomphezulu ibe yi-oxide engaphezulu efana naleyo yenziwe kwintsimbi ecocekileyo yechromium.Le oxide ibambene ngokuqinileyo nechromium-etyebileyo ikhusela umphezulu kwi-oxidation eyongezelelweyo.Lo maleko weoksidi ubhityile ngokugqithisileyo, apho ukukhazimla kwendalo komphezulu wentsimbi kunokubonwa, kunika intsimbi engatyiwayo indawo eyodwa.Ngaphezu koko, ukuba i-surface layer yonakaliswa, indawo yentsimbi eveziweyo iya kusabela kunye ne-atmosphere ukuzilungisa, iphinde ifake le oxide "ifilimu ye-passivation", kwaye iqhubeke idlala indima yokukhusela.Ngoko ke, zonke izinto zensimbi ezingenasici zinempawu eziqhelekileyo, oko kukuthi, umxholo we-chromium ungaphezu kwe-10.5%.Ukongeza kwi-chromium, i-alloying elements esetyenziswa ngokuqhelekileyo yi-nickel, i-molybdenum, i-titanium, i-niobium, ithusi, i-nitrogen, njl., ukuhlangabezana neemfuno zokusetyenziswa okuhlukeneyo kwesakhiwo kunye neempawu zensimbi engenasici.
I-304 yinto eqhelekileyo-injongo yensimbi engenasici esetyenziswa ngokubanzi ukwenza izixhobo kunye neengxenye ezifuna ukusebenza kakuhle ngokubanzi (ukumelana nokubola kunye nokubumba).
I-301 yensimbi engenasici ibonisa umsebenzi ocacileyo wokuqina ngexesha lokuguqulwa, kwaye isetyenziswe kwiimeko ezahlukeneyo ezifuna amandla aphezulu.
I-302 yensimbi engenastainless luhlobo oluthile lwentsimbi engama-304 enesiqulatho sekhabhoni ephezulu, enokufumana amandla aphezulu ngokuqengqeleka okubandayo.
I-302B luhlobo lwentsimbi engatyiwayo enomxholo ophezulu wesilicon, enokumelana okuphezulu ne-oxidation yobushushu obuphezulu.
I-303 kunye ne-303S e ziziintsimbi ezingenasici ezisikwa simahla ezinesulfure kunye neselenium, ngokulandelelanayo, kwaye zisetyenziswa kwizicelo apho ukunqunyulwa kwamahhala kunye nokugqiba okuphezulu kufunwa kakhulu.I-303Se insimbi engenasici iphinda isetyenziswe ukwenza iindawo ezifuna ukushisa okutshisayo, kuba phantsi kwezi meko, le nsimbi engenasici inokusebenza kakuhle okushushu.
I-304L luhlobo olusezantsi lwekhabhoni ye-304 yensimbi engenasici esetyenziswa apho i-welding ifunwa khona.Umxholo ophantsi wekhabhoni unciphisa imvula ye-carbide kwindawo echaphazelekayo ukushisa kufuphi ne-weld, engakhokelela kwi-intergranular corrosion (i-weld erosion) yensimbi engenasici kwezinye iindawo.
I-304N i-nitrogen-equkethe insimbi engenasici, kwaye i-nitrogen yongezwa ukwandisa amandla ensimbi.
I-305 kunye ne-384 i-stainless steels iqulethe i-nickel ephezulu kwaye inomlinganiselo ophantsi wokuqina wokuqina, okwenza ukuba zilungele izicelo ezahlukeneyo ezifuna ukubunjwa okuphezulu okubandayo.
I-308 insimbi engenasici isetyenziselwa ukwenza i-electrode.
I-309, i-310, i-314 kunye ne-330 i-stainless steels iphezulu kakhulu, ukwenzela ukuba kuphuculwe ukuxhathisa kwe-oxidation kunye namandla okukhwela kwentsimbi kwiqondo lokushisa eliphezulu.I-30S5 kunye ne-310S zizinto ezahlukeneyo ze-309 kunye ne-310 yensimbi engenasici, umahluko kuphela kukuba umxholo wekhabhoni uphantsi, ukwenzela ukunciphisa imvula ye-carbides kufuphi ne-weld.I-330 yensimbi engenasici inokumelana okuphezulu kakhulu ne-carburization kunye nokumelana nokothuka kwe-thermal.
Iindidi ze-316 kunye ne-317 i-stainless steels iqulethe i-aluminiyam kwaye ngoko ke ixhaphake kakhulu kwi-corrosion ye-pitting kune-304 ye-stainless steels kwiindawo zaselwandle kunye ne-chemical industry.Phakathi kwazo, i-316 i-stainless steel variants ibandakanya i-carbon low-stainless steel 316L, i-nitrogen ene-high-stain stainless steel 316N, kunye ne-stainless steel stainless 316F kunye nomxholo ophezulu wesulfure.
I-321, i-347 kunye ne-348 ziyinsimbi engenasici ezinzile kunye ne-titanium, i-niobium kunye ne-tantalum kunye ne-niobium ngokulandelanayo, ezifanelekileyo kumacandelo e-welding asetyenziswa kumaqondo aphezulu.I-348 luhlobo lwensimbi engenasici efanelekileyo kwishishini lamandla enyukliya, elinezithintelo ezithile kwisixa esidibeneyo se-tantalum kunye nedayimane.
Ixesha lokuposa: May-06-2023