Stainless Simbi 316L Strip Yekugadzira Heating Tubes uye Chemical Tangi

● Stainless simbi ialloy yesimbi ine kanenge 10% chromium, zvichiita kuti isaita ngura. Kuwedzerwa kwechromium kusimbi isina tsvina kunogadzira firimu rakatetepa resimbi oxide pamusoro pesimbi inodzivirira kubva kune zvinoora.

● Chikamu chakakurumbira chesimbi isina tsvina isimbi isina tsvina 316L inowanzoumbwa ne16 kusvika 18% chromium, 10 kusvika 14% nickel, 2 kusvika 3% molybdenum, uye chikamu chiduku checarbon. Kuwedzera molybdenum kune Stainless simbi 316L kunowedzera kusakara kwayo kana ichienzaniswa nemamwe mamakisi esimbi isina tsvina. Kuwedzerwa kwemamwe alloys kunowedzera kuwedzera maitiro ayo.

● Zvinhu uye maitiro esimbi isina tsvina 316L inoita kuti ive yechipiri-inonyanya kushandiswa giredhi resimbi isina tsvina mushure mesimbi isina tsvina 304. Inoshandiswa munzvimbo dzinopisa dzakadai semiti yemakemikari, refineries, uye midziyo yegungwa.

● Stainless simbi 316L ine yakaderera kabhoni yemukati uye inoshandiswa muzvishandiso zvinoisa simbi kune njodzi dzekunzwa. Iyo yakakwira kabhoni musiyano isimbi isina simbi 316H, iyo inopa yakanyanya kugadzikana yekupisa uye inokambaira kuramba. Imwe giredhi rinoshandiswa zvakanyanya resimbi isina tsvina 316L ndiyo yakagadzikana 316LTi. Simbi isina tsvina 316LTi inopa kuramba kuri nani kune intergranular corrosion.

● Simbi isina simbi inoshandisa musimboti wekufamba, umo simbi dzinoita "passive" kana kusaita oxidation kubva kune zvinoparadza zvinowanikwa mumhepo uye zvinogadzira zvinwiwa. Passivation inoitwa nekufumura simbi isina tsvina kumhepo, uko inovaka chromium oxides pamusoro payo.

● Kuti uwedzere kuumbwa kwefirimu yepasi, iyo alloy inotangwa kune mushonga wemakemikari apo inocheneswa zvakakwana nekuinyudza mu acidic passivation baths ye nitric acid. Zvinosvibisa, senge exogenous iron kana yemahara iron compounds, zvinobviswa kuti zvisapindire mukugadzira passive layer.

● Mushure mekuchenesa nebhati ine acidic, simbi inogadziriswa mubhati yeaqueous sodium hydroxide. A descaling process inobvisa mamwe mafirimu eoxide anogadzirwa neakakwira-tembiricha ekugaya, senge kupisa-kuumba, welding, uye kupisa kupisa.

Chitsauko Chepiri - Magiredhi eSimbi isina Stainless Kuenzaniswa neStainless Simbi 316L

● Chimiro chikuru chesimbi isina tsvina 316L ndeye molybdenum inogadzirisa, iyo inowedzera kusagadzikana kwayo. Ndiyo yechipiri inonyanya kukosha yezvose austenitic simbi isina tsvina mushure megiredhi resimbi isina tsvina 304. Austenitic simbi isina tsvina inosiyaniswa kubva kune dzimwe simbi dzisina tsvina ne nickel yavo kana nitrogen content, iyo inopa austenitic simbi isina tsvina yakasiyana-siyana yekristallline structure.

● Simbi dzisina tsvina dzakakamurwa nemakemikari ayo, maitiro emuviri, metallographic chimiro, uye maitiro ekushanda. Zvigadzirwa zvavo zvemuchina zvakakamurwa kuita mhuri ina: ferrite, martensite, austenite, uye duplex, simbi isina tsvina inosanganisira misanganiswa yemhuri nhatu dzekutanga, senge martensite-ferrite kana austenite-martensite. Iyo matrix chimiro cheakasiyana simbi isina tsvina inosarudza iwo mana mapoka kana mhuri.

● Mhuri dzesimbi dzisina simbi dzakakamurwazve kuva magiredhi anotsanangura zvimiro zvealloys anoshandiswa kuzvigadzira. Magiredhi echikuru anosarudzwa nenhamba dzine manhamba matatu dzakatangwa neSosaiti yeMotokari Engineers (SAE). Kunyangwe zviziviso zvine manhamba-matatu zvakajairika, nyika zhinji dzine masisitimu adzo, neNorth America ichishandisa nhanhatu-manhamba system yakagadzwa neAmerican Society for Testing and Materials (ASTM).

● Pasinei nehurongwa hwekuverengera, giredhi imwe neimwe yesimbi isina tsvina inofanira kuenderana neyakatemerwa kusanganiswa kwealloys. Imwe neimwe shanduko, kugadzirisa, kana kuwedzera kune alloy kunokanganisa kushanda kwegiredhi resimbi isina tsvina. Iyo chaiyo seti yehunhu, zvivakwa, uye hunhu hwekuita zvinotarisirwa apo mhuri nemagiredhi zvinoiswa pamwechete nekuzivikanwa.
Iwo magiredhi akasiyana esimbi isina simbi ane madhigirii akasiyana ekudzivirira ngura, kusimba, kusimba, uye yakakwirira uye yakaderera-tembiricha kuita. Iyo chaiyo inotaridza magiredhi akasiyana-siyana ndeye microstructure yavo, iyo inocherechedzwa uchishandisa maikorosikopu yakaiswa pamakumi maviri neshanu magnification. Iyo microstructure yechinhu chero chipi zvacho inokanganisa zvimiro zvayo zvemuviri, senge simba, kuoma, ductility, kuomarara, kusaita ngura, hunhu hwekushisa, uye kupfeka kuramba.

● Iyo microstructure yesimbi isina tsvina 316L ine masero emagetsi ane miganhu yakasimbiswa nechromium, manganese, molybdenum, uye niobium zvinhu, izvo zvinowedzera kusagadzikana kwayo. Kuramba kwecorrosion kunovandudzwa nekuda kwe densification, iyo yakanaka cellular zvimiro, uye kupfumisa kwechromium uye molybdenum panzvimbo dzepakati.

● Austenitic Stainless Steels: Masimbi eAustenitic Stainless haasi magineti ane huwandu hwakawanda hwechromium uye nickel uye mwero wakaderera wecarbon. Iro ndiro boka guru uye rinoshandiswa zvikuru resimbi dzisina tsvina.
Austenitic Stainless steels ine face-centered cubic (FCC) crystal structure ine atomu imwe pakona yega yega cube uye imwe iri pakati pechiso chega chega, chimiro chezviyo chakaumbwa nekuda kwenickel iri kuwedzerwa se alloy. Iyo microstructure ye austenitic Stainless simbi inoita kuti ive yakasimba uye iwedzere ductile, kunyangwe pakupisa kwe cryogenic.

● Kana iri pasi pekupisa kwakanyanya, austenitic stainless steels hairasikirwi nesimba rayo, izvo zvinovapa zvakanakisisa kuumbwa uye weldability. Sezvo iyo austenitic chimiro ichichengetedzwa pane ese tembiricha, ivo havapindure kune kupisa kurapwa. Pane kudaro, ivo vanotonhora-basa kuvandudza kusimba kwavo, simba, kuoma, uye kusagadzikana kusagadzikana.

● The musimboti alloy ose austenitic Stainless steels is nickel, iyo inoshandiswa ose akatevedzana 300 austenitic Stainless simbi, kusanganisira mamakisi 316L uye 316L. Kana simbi isina tsvina iine nickel yakaderera uye yakakwira nitrogen content, haisisiri 300 series stainless steel. Kuvapo kwenitrogen mumasimbi asina simbi kunogumira nekuti kunogona kuve nemhedzisiro yakaipa. Stainless steels ine yakaderera nickel uye nitrogen content inoiswa senhevedzano 200 Stainless steels.

Stainless Simbi 300 Series

● Austenitic Stainless Stainless 300 series dzakagadzirirwa kuti dzirambe corrosion uye kupfeka nekugadzirwa kwakanakisisa uye simba rakasiyana pane chero tembiricha. Chinhu chinotsanangudza che300 series simbi isina tsvina ndeye nickel content muzvikamu zve6% kusvika pa20%, zvichienderana negiredhi re300 series simbi isina tsvina.

● Series 304 - Inonyanya kushandiswa ye300 yakatevedzana yesimbi isina tsvina yakatevedzana 304, iyo inonyanya kushandiswa kwese simbi isina tsvina. Iine simba repamusoro-soro re621 MPa kana 90 Ksi ine tembiricha yekushanda yakawanda ye1598 of F (870 oC). Izvo zvakawanda zvakanaka zvimiro zveakateedzana 304 Stainless simbi inoita kuti ive yakanaka kune akasiyana maapplication.

● Series 316L - Mushure memutsara 304, mutsara 316L ndiyo yechipiri inonyanya kushandiswa simbi isina tsvina, ine simba rinotyisa re 549 MPa kana 84 Ksi uye yakanyanya kushandiswa tembiricha ye1472 oF (800 oC). Kunyangwe nhevedzano 316L ine yakaderera tembiricha simba uye tembiricha kushivirira pane akatevedzana 304, ine nani kuramba chlorides, semunyu, izvo zvinoita kuti ive sarudzo inosarudzwa yezvikumbiro zvinosanganisira chlorides nemunyu.
Kunze kwekupokana kwayo nekloridi, musiyano mukuru pakati peakatevedzana 304 uye akatevedzana 316L kuvepo kwemolybdenum mumutsara 316L pazvikamu zve 2% kusvika 3%, iyo inozivisa akatevedzana 316L seCr-Ni-Mo system. Kuwedzera molybdenum kunoita kuti mutsara 316L usarambe kune gomba rinokonzerwa nephosphoric acid, acetic acid, uye dilute chloride mhinduro. Simba uye kuoma kwe molybdenum kunowedzera mutsara 316L kupisa uye kupfeka kuramba.

● Nzvimbo yekuvaka, magonhi, mahwindo nezvombo zvehondo, mamodule ekunze kwemahombekombe, matangi nemapombi ematangi emakemikari, kugadzira, kuchengetera uye kutakura kwepamusoro pevhu kwemakemikari, chikafu nezvinwiwa, pharmacy, synthetic fiber, mapepa uye machira emiti nemidziyo yekumanikidza. Nekuda kweiyo yakaderera C-mukati, kushorwa kune intergranular corrosion zvakare kunovimbiswa mune welded mamiriro.