I-F51, i-F53, i-F55, i-F60 ne-F61 ziyi-duplex ne-super duplex yensimbi engagqwali ethathwe ku-ASTM A182. Leli zinga lingelinye lamazinga okubhekiselwa kuwo kabanzi mayelana nokuhlinzekwa kwezinsimbi ezingenasici.
I-American Society of Testing and Materials (ASTM) ingenye yezinhlangano zamazinga ezinkulu kunazo zonke emhlabeni, ebuyekezayo, ehlanganisayo futhi eshicilela izindinganiso zobuchwepheshe zohlu olubanzi lwezinto ezibonakalayo. Amazinga ashicilelwe aqala ngohlamvu 'A' izinsimbi zekhava.
I-ASTM A182 Ejwayelekile ('Ukucaciswa Okujwayelekile Kwengxubevange Efojiwe noma Egingqelwe kanye namaFlange Epayipi Ensimbi Engagqwali, Ukufakwa Okufojiwe, Amavalufu Nezingxenye Zesevisi Yezinga Lokushisa Okuphezulu') manje isisohlelweni lwayo lwe-19 (2019). Phakathi nalezi zinhlelo, kufakwe ama-alloys amasha futhi kwanikezwa inombolo 'yebanga' entsha. Isiqalo esithi 'F' sibonisa ukuhambisana kwaleli zinga emikhiqizweni engumgunyathi. Isijobelelo senombolo sihlanganiswe ngokwengxenye ngohlobo lwe-alloy okungukuthi i-austenitic, martensitic, kodwa asisho ngokuphelele. Okubizwa ngokuthi 'i-Ferritic-Austenitic' ama-duplex steels anenombolo phakathi kuka-F50 no-F71, nezinombolo ezikhuphukayo ngokwengxenye ezicishe zifinyelele kumamaki asanda kungezwa.
Amabanga Ahlukene Wezinsimbi Ezingenasici ze-Duplex
I-ASTM A182 F51 ilingana ne-UNS S31803. Lawa bekungamazwibela oqobo ensimbi engagqwali engu-22% Cr duplex. Kodwa-ke, njengoba kuchaziwe esihlokweni sangaphambilini, abakhiqizi bathuthukise ukwakheka kwafinyelela ekugcineni okuphezulu kwemikhawulo ukuze bathuthukise ukumelana nokugqwala kwemigodi. Leli banga, elinokucaciswa okuqinile, libhalwe njengokuthi F60, elilingana ne-UNS S32205. Ngenxa yalokho, i-S32205 ingagunyazwa kabili njenge-S31803 kodwa hhayi okuphambene. Ibanga cishe u-80% wokukhiqizwa kwensimbi engagqwali eyi-duplex iyonke. Langley Alloys stocksI-Sanmac 2205, okuwumkhiqizo wobunikazi we-Sandvik ohlinzeka 'ngokusebenza okuthuthukisiwe njengokujwayelekile'. Ibanga lethu lesitoko lisuka ku-½” lifike kumabha aqinile obubanzi obungu-450mm, kanye namabha angenalutho namapuleti futhi.
I-ASTM A182 F53 ilingana ne-UNS S32750. Lena i-25% Cr super duplex yensimbi engagqwali ethuthukiswa kakhulu ngabakwaSandvik njengeSAF2507. Ngokuqukethwe kwe-chromium okwandisiwe uma kuqhathaniswa ne-F51 kunikeza ukumelana nokugqwala kwe-pitting okuthuthukisiwe. Amandla esivuno nawo aphezulu, okuvumela abaklami bezingxenye ukuthi banciphise usayizi wesigaba sezinhlelo zokusebenza ezithwala ukulayisha. I-Langley Alloys isitokwe imigoqo eqinile ye-SAF2507 esuka e-Sandvik, enosayizi osuka ku-½” ukuya ku-16” ububanzi.
I-ASTM A182 F55 ilingana ne-UNS S32760. Umsuka waleli banga ungalandelelwa emuva ekuthuthukisweni kwe-Zeron 100 nguPlatt & Mather, Manchester UK. Ngenye insimbi engagqwali eyi-super duplex esekelwe ekwakhiweni kwe-Cr engu-25%, kodwa ngokwengezwa kwe-tungsten. Langley Alloys stocksSAF32760amabha aqinile asuka e-Sandvik, ngobukhulu asuka ku-½” kuya ku-16” ububanzi.
I-ASTM A182 F61 ilingana ne-UNS S32550. Lokhu, futhi, ukulinganiselwa kweFerralium 255, insimbi yokuqala eyi-super duplex engagqwali eyasungulwaI-Langley Alloys. Yethulwa ngo-1969, manje isinikeze iminyaka engaphezu kwengu-50 isevisi eyimpumelelo ezinhlobonhlobo zezicelo ezifunwa kakhulu. Uma iqhathaniswa ne-F53 ne-F55 iletha amandla andayo nokusebenza kokugqwala. Amandla ayo amancane esivuno adlula ama-85ksi, kuyilapho amanye amabanga elinganiselwe ku-80ksi. Ngaphezu kwalokho, iqukethe kuze kufike ku-2.0% wethusi, esiza ukumelana nokugqwala. Langley Alloys stocksI-Ferralium 255-SD50ngosayizi ukusuka ku-5/8” ukuya ku-14” ububanzi bebha eqinile, kanye namapuleti afika ku-3” ukujiya.
Isikhathi sokuthumela: Mar-06-2020