Duplex simbi dzisina tsvina dzinoita > 80% yekushandiswa kwe duplex, super duplex uye hyper duplex mamakisi. Yakagadzirwa mu1930's yekushandiswa mukugadzira bepa uye pulp, duplex alloys akavakirwa akatenderedza 22% Cr kuumbwa uye yakasanganiswa austenitic:ferritic microstructure inopa inodiwa michina zvivakwa.
Zvichienzaniswa neiyo generic 304/316 austenitic stainless steels, mhuri ye duplex mamakisi inowanzova nesimba rakapetwa kaviri uye inopa kukwidziridzwa kwakakosha mukupokana nekuora. Kuwedzera iyo chromium yemukati yesimbi isina simbi inozowedzera kupinza kwavo kwegomba corrosion. Nekudaro, iyo Pitting Resistance Equivalent Number (PREN) iyo inokanganisa alloys kuramba kune gomba corrosion inosanganisirawo akati wandei ezvimwe zvinhu mufomula yayo. Hunyengeri uhu hunogona kushandiswa kutsanangura kuti mutsauko uripo pakati peUNS S31803 neUNS S32205 wakagadzirwa sei uye kuti zvine basa here.
Kutevera kugadzirwa kwe duplex simbi isina tsvina, chirevo chavo chekutanga chakatorwa seUNS S31803. Nekudaro, chiverengero chevagadziri vanotungamira vanga vachigara vachigadzira giredhi iyi kusvika kumucheto wepamusoro weiyo inobvumidzwa yakatarwa. Izvi zvakaratidza chido chavo chekuwedzera corrosion performance yealloy, yakabatsirwa nekugadzirwa kweAOD steelmaking process iyo yakabvumira kutonga kwakasimba kwekuumbwa. Mukuwedzera, yakabvumirawo mwero we nitrogen wekuwedzera kuve nekufurirwa, pane kungovepo sechinhu chekumashure. Naizvozvo, iyo yepamusoro-soro inoita duplex giredhi yakatsvaga kukwirisa mazinga echromium (Cr), molybdenum (Mo) uye nitrogen (N). Musiyano uripo pakati peduplex alloy ine kuumbwa kunosangana nepasi peiyo yakatarwa, maringe neiyo inorova pamusoro peiyo yakatarwa inogona kuve akati wandei mapoinzi zvichienderana neformula PREN = %Cr + 3.3 %Mo + 16 % N.
Kuti tisiyanise duplex Stainless simbi inogadzirwa kumucheto wepamusoro weiyo renji renji, imwe tsanangudzo yakaunzwa, inova UNS S32205. Duplex simbi isina tsvina yakagadzirwa kuS32205 (F60) caption ichasangana zvizere neS31803 (F51) caption, nepo reverse isiri chokwadi. Naizvozvo S32205 inogona kuve mbiri-yakasimbiswa seS31803.
| Giredhi | Ni | Cr | C | P | N | Mn | Si | Mo | S |
| S31803 | 4.5-6.5 | 21.0-23.0 | Hurefu 0.03 | Hurefu 0.03 | 0.08-0.20 | Max 2.00 | Max 1.00 | 2.5-3.5 | Hurefu 0.02 |
| S32205 | 4.5-6.5 | 22-23.0 | Hurefu 0.03 | Hurefu 0.03 | 0.14-0.20 | Max 2.00 | Max 1.00 | 3.0-3.5 | Hurefu 0.02 |
SAKYSTEEL inochengetera huwandu hwakakwana hwe duplex simbi isina tsvina seyeanosarudzika kugovera shamwari yeSandvik. Isu tinotenga S32205 muhukuru kubva pa5/8 ″ kusvika 18 ″ dhayamita mubhawa yakatenderedzwa, uye mazhinji emasheya edu ari muSanmac® 2205 giredhi, iyo inowedzera 'yakakwidziridzwa machinability seyakajairwa' kune zvimwe zvivakwa. Pamusoro pezvo, isu zvakare tinochengetera huwandu hweS32205 hollow bar kubva kuUK yedu yekuchengetera zvinhu, uye ndiro inosvika 3 ″ kubva yedu Portland, USA warehouse.
Nguva yekutumira: Oct-25-2019