Phakathi kweentlobo ezahlukeneyo zensimbi engenasici, amabakala 304, 304L, kunye ne-304H asetyenziswa ngokuqhelekileyo. Ngelixa zinokubonakala zifana, ibakala ngalinye lineempawu zalo ezizodwa kunye nokusetyenziswa kwalo.
IBanga304 intsimbi engenasiciyeyona nto isetyenziswa kakhulu kwaye iguquguqukayo ye-300 series steels stainless. Iqulethe i-18-20% ye-chromium kunye ne-8-10.5% ye-nickel, kunye nexabiso elincinci lekhabhoni, i-manganese kunye ne-silicon. Eli bakala linokumelana nokugqwesa okugqwesileyo kunye nokumila kakuhle. Ihlala isetyenziswa kwizicelo ezifana nezixhobo zasekhitshini, ukulungiswa kokutya, kunye nokuhonjiswa kwezakhiwo.
I-304L ipayipi yensimbi engenasicii-carbon steel pipe ephantsi ye-304 yebanga, kunye ne-carbon content ephezulu ye-0.03%. Lo mxholo wekhabhoni ophantsi unceda ukunciphisa imvula ye-carbide ngexesha le-welding, iyenze ilungele izicelo ze-welding. Isiqulatho sekhabhoni esisezantsi sikwanciphisa umngcipheko we-sensitization, okuyiyo ukubunjwa kwe-chromium carbides kwimida yengqolowa, engakhokelela kwi-corrosion ye-intergranular. I-304L idla ngokusetyenziswa kwizicelo ze-welding, kunye neendawo apho umngcipheko wokugqwala uxhalabile, njengokulungiswa kweekhemikhali kunye nezixhobo zonyango.
304H intsimbi engenasiciyinguqulo yekhabhoni ephezulu yebakala 304, enomxholo wekhabhoni ukusuka kwi-0.04-0.10%. Umxholo wekhabhoni ophezulu unika amandla angcono obushushu obuphezulu kunye nokumelana nokunyuka. Oku kwenza i-304H ifaneleke kwizicelo zokushisa eziphezulu, ezifana neenqanawa zoxinzelelo, i-heat exchangers, kunye ne-boilers yezoshishino. Nangona kunjalo, umxholo ophezulu wekhabhoni wenza ukuba i-304H ichaphazeleke ngakumbi kwi-sensitization kunye ne-intergranular corrosion, ngakumbi kwizicelo ze-welding.
Isishwankathelo, umahluko omkhulu phakathi kwala mabanga ngumxholo wabo wekhabhoni kunye nefuthe kwi-welding kunye nezicelo zokushisa okuphezulu. IBakala 304 yeyona njongo isetyenziswa kakhulu neqhelekileyo, lo gama i-304L iyeyona ikhethwayo xa kusenziwa izicelo zokuwelda kunye neendawo apho umhlwa yinkxalabo. I-304H inomxholo ophezulu wekhabhoni kwaye ifanelekile kwizicelo zeqondo lokushisa eliphezulu, kodwa ukuchaphazeleka kwayo kwi-sensitization kunye ne-intergranular corrosion idinga ukuqwalaselwa ngokucophelela. Xa ukhetha phakathi kwala mabanga, kubalulekile ukuqwalasela iimfuno ezithile zesicelo, kubandakanywa indawo yokusebenza, ubushushu kunye neemfuno ze-welding.
Qhagamshelana nathi ngolwazi oluthe kratya
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Ixesha lokuposa: Aug-08-2024