Intshayelelo

IBanga le-316 linqanaba eliqhelekileyo lokuthwala i-molybdenum, okwesibini ngokubaluleka ukuya kuma-304 phakathi kwe-austenitic stainless steels. Imolybdenum inika iipropati ezingama-316 ezingcono zokumelana nomhlwa kuneBanga lama-304, ingakumbi ukuxhathisa okuphezulu kwimingxuma kunye nokuhlwa kwemingxuma kwiindawo ezinekloridi.

IBanga le-316L, i-carbon version ephantsi ye-316 kwaye ikhuselekile kwi-sensitization (i-grain boundary carbide precipitation). Ngaloo ndlela isetyenziswa kakhulu kwigeyiji enzima edityanisiweyo (ngaphezulu kwe-6mm). Ngokuqhelekileyo akukho mahluko axabisayo phakathi kwe-316 kunye ne-316L yensimbi engenasici.

Isakhiwo se-austenitic sikwanika la mabanga ukuqina okugqwesileyo, kude kube phantsi ukuya kumaqondo obushushu e-cryogenic.

Xa kuthelekiswa ne-chromium-nickel austenitic steel stainless steels, i-316L yensimbi engenasici ibonelela ngokunyuka okuphezulu, uxinzelelo lokugqabhuka kunye namandla okuqina kumaqondo obushushu aphezulu.

Iimpawu eziphambili

Ezi zakhiwo zichazwe kwimveliso ephothiweyo (ipleyiti, iphepha kunye nekhoyili) kwi-ASTM A240/A240M. Iipropati ezifanayo kodwa zingafane zichazwe kwezinye iimveliso ezinjengombhobho kunye nebar kwiinkcukacha zazo.

Ukuqamba

Itheyibhile 1. Iindidi zokuqulunqa ze-316L zensimbi ezingenasici.

Iipropati zoomatshini

Itheyibhile 2. Iipropati ze-Mechanical ze-316L zensimbi ezingenasici.

Iipropati Zomzimba

Itheyibhile 3.Iipropathi ezibonakalayo eziqhelekileyo ze-316 grade steels stainless.

Uthelekiso lweNgcaciso yeBanga

Uluhlu lwesi-4.Imigangatho yeBanga le-316L yeentsimbi ezingenasici.

Qaphela: Olu luthelekiso luqikelelo kuphela. Uluhlu lwenzelwe uthelekiso lwezixhobo zokusebenza ezifanayo hayi njengeshedyuli yeekhontrakthi ezilinganayo. Ukuba ukulingana ngqo kuyafuneka, kufuneka kuqwalaselwe iinkcukacha zokuqala.

AmaBanga aManye anokubakho

Itheyibhile 5. Amanye amabakala anokubakho ukuya kwi-316 yensimbi engenasici.

Uluhlu 5.Amanqanaba anokubakho angamanye ukuya kwi-316 yensimbi engenasici.

IBanga

Kutheni inokuthi ikhethwe endaweni ka-316?

317L

Ukuchasana okuphezulu kwi-chloride kune-316L, kodwa kunye nokuchasana okufanayo kuxinzelelo lwe-corrosion cracking.

Ukunyangwa kokuMhlwa

Igqwesileyo kuluhlu lwemekobume ye-atmospheri kunye nemithombo yeendaba ezininzi ezonakalisayo - zixhathisa ngokubanzi kune-304. Ngokuxhomekeke kwi-pitting kunye ne-crevice corrosion kwindawo efudumeleyo ye-chloride, kunye noxinzelelo lokuqhekeka kwe-corrosion ngaphezulu kwe-60.°C. Ithathwa njengokumelana namanzi okusela ukuya kuthi ga kwi-1000mg/L chlorides kumaqondo obushushu akwindawo engqongileyo, iyancipha ukuya kutsho malunga ne-500mg/L kwi-60.°C.

316 idla ngokuthathwa njengomgangatho“zaselwandle grade steel stainless”, kodwa ayixhathisi kumanzi olwandle afudumeleyo. Kwiindawo ezininzi zaselwandle i-316 ibonisa umhlwa ongaphezulu, odla ngokubonakala njengebala elimdaka. Oku kunxulunyaniswa ngakumbi nemingxuma kunye nokugqiba komphezulu orhabaxa.

Ukumelana nobushushu

Ukumelana ne-oxidation elungileyo kwinkonzo yethutyana ukuya kuma-870°C kunye nenkonzo eqhubekayo ukuya kuma-925°C. Ukusetyenziswa ngokuqhubekayo kwe-316 kwi-425-860°Uluhlu lwe-C alukhuthazwa ukuba ukuchasana nokukhula okumanzi okulandelayo kubalulekile. IBanga le-316L lixhathisa ngakumbi kwimvula ye-carbide kwaye linokusetyenziswa kuluhlu lobushushu obungentla. IBanga lama-316H linamandla aphezulu kumaqondo obushushu aphezulu kwaye ngamanye amaxesha lisetyenziselwa ulwakhiwo kunye noxinzelelo oluqulathe izicelo kumaqondo obushushu angaphezu kwama-500.°C.

Unyango lobushushu

Unyango lwesisombululo (Annealing) - Ukushisa ukuya kwi-1010-1120°C kwaye uphole ngokukhawuleza. La mabanga akakwazi ukuqina ngonyango lwe-thermal.

Ukuwelda

I-weldability egqwesileyo ngayo yonke imidibaniso esemgangathweni kunye neendlela zokuxhathisa, zombini kunye nangaphandle kweentsimbi zokuzalisa. Amacandelo adityanisiweyo anzima kwiBanga lama-316 afuna ukufakwa kwe-post-weld annealing ukwenzela ukuxhathisa ukudleka okukhulu. Oku akufuneki kwi-316L.

I-316L yensimbi engenasici ayinakuxutywa ngokubanzi usebenzisa iindlela ze-oxyacetylene welding.

Umatshini

I-316L yensimbi engenasici ithanda ukusebenza nzima ukuba imatshini yenziwe ngokukhawuleza. Ngesi sizathu izantya eziphantsi kunye namazinga okutya angaguqukiyo ayacetyiswa.

I-316L insimbi engenasici nayo ilula kumatshini xa kuthelekiswa ne-316 yensimbi engenasici ngenxa yekhabhoni ephantsi.

Ukusebenza okushushu kunye nokubandayo

I-316L yensimbi engenasici inokuba shushu isetyenzwe ngokusebenzisa iindlela eziqhelekileyo zokusebenza ezishushu. Amaqondo obushushu asebenzayo afanelekileyo kufuneka abe kuluhlu lwe-1150-1260°C, kwaye ngokuqinisekileyo akufunekanga ibe ngaphantsi kwama-930°C. Ukukhutshwa komsebenzi emva komsebenzi kufuneka kuqhutywe ukuze kubangele ukuxhathisa ubuninzi bomhlwa.

Uninzi lwemisebenzi eqhelekileyo ebandayo efana nokucheba, ukuzoba kunye nokunyathela kunokwenziwa kwi-316L yensimbi engenasici. I-post work annealing kufuneka iqhutywe ukususa uxinzelelo lwangaphakathi.

Ukuqina kunye nokusebenza nzima

I-316L insimbi engenasici ayiqini ekuphenduleni unyango lobushushu. Inokuqiniswa kukusebenza okubandayo, okunokubangela ukomelela okwandisiweyo.

Usetyenziso

Usetyenziso oluqhelekileyo lubandakanya:

•Izixhobo zokulungiselela ukutya ngokukodwa kwiindawo ezinekloridi.

•Amachiza

•Usetyenziso lwaselwandle

•izicelo Architectural

•Ufakelo lwezonyango, kubandakanywa izikhonkwane, izikrufu kunye nokufakelwa kwamathambo njengokutshintshwa kwehip kunye namadolo.

•Izibophelelo