Hastelloy iNi-Mo alloy ine yakanyanyisa kuderera kabhoni uye silicon yemukati, iyo inoderedza kunaya kwecarbides uye zvimwe zvikamu munzvimbo dzeweld uye dzinopisa-zvinopisa, nekudaro kuve nechokwadi chekugonesa kwakanaka kunyangwe mune welded state. Corrosion resistance. Sezvatinoziva tese, Hastelloy ine yakanakisa corrosion kuramba mune dzakasiyana siyana kuderedza midhiya, uye inogona kumirisana nekuora kwehydrochloric acid pane chero tembiricha uye chero kusungwa pasi pekumanikidzwa kwakajairwa. Iine zvakanakisa kusadzivirirwa nekuora mukati me-medium-concentration isiri-oxidizing sulfuric acid, akasiyana-siyana efosphoric acid, high-temperature acetic acid, formic acid uye mamwe organic acids, bromic acid uye hydrogen chloride gasi. Panguva imwecheteyo, zvakare inopesana nekuora ne halogen catalysts. Nokudaro, Hastelloy inowanzoshandiswa mumhando dzakasiyana-siyana dzepetroleum nemakemikari, zvakadai se distillation uye kusanganiswa kwehydrochloric acid; alkylation ye ethylbenzene uye yakaderera-kumanikidza carbonylation yeacetic acid uye mamwe maitiro ekugadzira. Nekudaro, yakawanikwa mumaindasitiri ekushandiswa kweHastelloy kwemakore mazhinji:
(1) Kune nzvimbo mbiri dzekukurudzira muHastelloy alloy dzine simba guru pakurwisana ne intergranular corrosion: nzvimbo yakakwirira yekushisa ye 1200 ~ 1300 ° C uye yepakati tembiricha nzvimbo ye550 ~ 900 ° C;
(2) Pamusana pekuparadzaniswa kwedendrite kwesimbi ye weld uye nzvimbo inopisa yeHastelloy alloy, intermetallic phases uye carbides inonaya pamwe chete nemiganhu yezviyo, zvichiita kuti zvive zvakanyanya kugadzikana kune intergranular corrosion;
(3) Hastelloy ine hurombo hwekudziya kugadzikana pane yepakati tembiricha. Kana iyo iron yemukati muHastelloy alloy inowira pasi pe2%, iyo alloy inonzwa nekushandurwa kweiyo β phase (kureva, Ni4Mo phase, yakarairwa intermetallic compound). Kana iyo alloy ikaramba iri mutembiricha ye650 ~ 750 ℃ kwechinguva chidiki, iyo β chikamu chinoumbwa ipapo ipapo. Kuvapo kwe β chikamu kunoderedza kuoma kweHastelloy alloy, zvichiita kuti ive nehanya nekunetseka kwekuora, uye inotokonzera Hastelloy alloy Yakazara kupisa kurapwa) uye Hastelloy midziyo inoputika munzvimbo yebasa. Parizvino, yakajairwa nzira dzekuyedza dze intergranular corrosion kuramba yeHastelloy alloys yakasarudzwa nenyika yangu nedzimwe nyika dzepasi ndiyo yakajairwa kubikira hydrochloric acid nzira, uye nzira yekuongorora ndiyo nzira yekuderedza uremu. Sezvo Hastelloy iri alloy inopesana ne hydrochloric acid corrosion, iyo yakajairwa kubikira hydrochloric acid nzira haina hanya yekuyedza iyo intergranular corrosion maitiro eHastelloy. Masangano ekutsvagisa kwesainzi emudzimba anoshandisa yakakwira-tembiricha yehydrochloric acid nzira yekudzidza maHastelloy alloys uye akawana kuti kushora kweHastelloy alloys hakubvi chete pakuumbwa kwayo kwemakemikari, asiwo nemaitiro ayo ekugadzirisa kupisa. Kana iyo yekupisa yekugadzirisa inodzorwa zvisina kufanira, kwete chete makristasi zviyo zveHastelloy alloys inokura, asiwo iyo σ phase ine yakakwira Mo ichanaya pakati pezviyo. , muganho wezviyo etching kudzika kweiyo coarse-grained plate uye yakajairika ndiro inenge yakapetwa kaviri.
Nguva yekutumira: May-15-2023
