Iyiphi insimbi ekwazi ukumelana nokushisa okuphezulu?
Kunezinhlobo eziningi zensimbi, kodwa imisebenzi yazo ayifani ncamashi.
Ngokuvamile, sibhekisela kunsimbi yokushisa okuphezulu njengokuthi "insimbi ekwazi ukumelana nokushisa". Insimbi ekwazi ukumelana nokushisa ibhekisela ekilasini lezinsimbi ezinokumelana ne-oxidation namandla agculisayo ezinga lokushisa eliphezulu nokumelana nokushisa okuhle kakhulu ngaphansi kwezimo zokushisa eziphezulu. I-China yaqala ukukhiqiza insimbi ekwazi ukumelana nokushisa ngo-1952.
Insimbi ekwazi ukumelana nokushisa ivamise ukusetshenziselwa ukwakhiwa kwezingxenye ezisebenza emazingeni okushisa aphezulu kuma-boilers, ama-steam turbines, imishini yamandla, iziko lezimboni kanye nezimboni zezimboni ezifana nezimboni zezindiza nezephethiloli. Ngaphezu kwamandla okushisa aphezulu kanye nokumelana nokushisa okuphezulu kwe-oxidative corrosion, lezi zingxenye zidinga ukumelana okwanelisayo, ukucutshungulwa okuvelele kanye nokushisela, kanye nokuzinza okuthile kokuhlelwa ngokuvumelana nokusetshenziswa okuhlukile.
Insimbi ekwazi ukumelana nokushisa ingahlukaniswa ngezinhlobo ezimbili ngokomsebenzi wayo: insimbi elwa nokushunqiswa kwensimbi nensimbi ekwazi ukumelana nokushisa. Insimbi ye-Anti-oxidation ibizwa nangokuthi insimbi yesikhumba ngamafuphi. Insimbi yamandla ashisayo isho insimbi enokumelana ne-oxidation okuvelele emazingeni okushisa aphezulu futhi enamandla aphezulu okushisa.
Insimbi ekwazi ukumelana nokushisa ingahlukaniswa ngensimbi ekwazi ukumelana nokushisa, insimbi ye-martensitic ekwazi ukumelana nokushisa, insimbi ekwazi ukumelana nokushisa ne-pearlite ekwazi ukumelana nokushisa ngokuvumelana nokuhlelwa kwayo kokujwayelekile.
Insimbi ekwazi ukumelana nokushisa i-Austenitic iqukethe izinto eziningi ezihlanganisa i-austenite njenge-nickel, i-manganese, ne-nitrogen. Uma ingaphezulu kuka-600 ℃, inamandla amahle ezinga lokushisa eliphezulu nokuzinza kokuhlelwa, futhi inomsebenzi omuhle kakhulu wokushisela. Ngokuvamile isetshenziswa ngaphezu kuka-600 ℃ idatha yokushisa kokushisa komsebenzi. Insimbi ekwazi ukumelana nokushisa i-Martensitic ngokuvamile inokuqukethwe kwe-chromium okungu-7 kuya ku-13%, futhi inamandla okushisa aphezulu, ukumelana ne-oxidation kanye nokumelana nokugqwala komhwamuko wamanzi ngaphansi kuka-650 ° C, kodwa ukushisela kwayo akukubi.
Insimbi ye-ferritic ekwazi ukumelana nokushisa iqukethe izakhi ezengeziwe ezifana ne-chromium, i-aluminium, i-silicon, njll., eyenza ukuhlelwa kwesigaba esisodwa se-ferrite, inekhono elivelele lokumelana ne-oxidation kanye nokugqwala kwegesi lokushisa eliphezulu, kodwa inamandla okushisa aphansi kanye nokuqina okukhulu ekamelweni lokushisa. . , Ukushisela okungekuhle. I-pearlite eyingxube yensimbi ekwazi ukumelana nokushisa ikakhulukazi i-chromium ne-molybdenum, futhi inani eliphelele ngokuvamile alidluli u-5%.
Ukuphepha kwayo akufaki i-pearlite, i-ferrite, ne-bainite. Lolu hlobo lwensimbi lunamandla amahle kakhulu okushisa okuphezulu nokusebenza kwenqubo ku-500 ~ 600 ℃, futhi intengo iphansi.
Isetshenziswa kabanzi ukwenza izingxenye ezikwazi ukumelana nokushisa ngaphansi kuka-600 ℃. Okufana namapayipi ensimbi e-boiler, ama-turbine impellers, ama-rotors, ama-fasteners, imikhumbi enengcindezi ephezulu, amapayipi, njll.
Isikhathi sokuthumela: Jan-19-2020