Ndeipi simbi inodzivirira kupisa kwepamusoro?
Kune mhando dzakawanda dzesimbi, asi mabasa avo haana kunyatsofanana.
Kazhinji, tinoreva simbi yepamusoro-soro se "simbi inodzivirira kupisa". Simbi inodzivirira kupisa inoreva kirasi yesimbi ine oxidation kuramba uye inogutsa inogutsa simba rekushisa uye yakanakisa kupisa kupisa pasi pemamiriro ekushisa. China yakatanga kugadzira simbi isingaite kupisa muna 1952.
Simbi inodzivirira kupisa inowanzo shandiswa mukugadzira zvinhu zvinoshanda pakupisa kwakanyanya mumaboilers, ma turbines emagetsi, muchina wemagetsi, vira remaindasitiri uye zvikamu zveindasitiri zvakaita sendege uye petrochemical maindasitiri. Kuwedzera kune yakanyanya tembiricha simba uye kuramba kune yakanyanya tembiricha oxidative corrosion, izvi zvikamu zvinodawo kuramba kunogutsa, kushambidzika kwekugadzirisa uye weldability, uye kumwe kugadzikana kwekuronga zvinoenderana nekushandiswa kwakasiyana.
Simbi inodzivirira kupisa inogona kukamurwa kuita mhando mbiri zvichienderana nebasa rayo: anti-oxidation simbi uye simbi inodzivirira kupisa. Anti-oxidation simbi inonziwo ganda simbi kwenguva pfupi. Kupisa-simba simbi inoreva simbi ine yakatanhamara oxidation inodzivirira pakupisa kwepamusoro uye ine simba repamusoro-tembiricha.
Simbi inodzivirira kupisa inogona kupatsanurwa kuita austenitic inodzivirira kupisa simbi, martensitic isingadzivirire simbi, ferritic isingadzivirire simbi uye pearlite isingadzivirire simbi zvinoenderana neyakajairwa kurongeka kwayo.
Austenitic heat-resistant simbi ine akawanda austenite constituent zvinhu zvakaita senickel, manganese, uye nitrogen. Kana iri pamusoro pe600 ℃, iine simba rakanaka rekupisa uye kugadzikana kwehurongwa, uye ine basa rakanaka rekunama. Iyo inowanzo shandiswa pamusoro pe600 ℃ Heat intensity data yekushanda. Martensitic inodzivirira kupisa simbi kazhinji ine chromium ye7 kusvika 13%, uye ine yakanyanya tembiricha simba, oxidation inodzivirira uye yemvura mhute inodzivirirwa pasi pe650 ° C, asi iyo weldability haina kunaka.
Ferritic inodzivirira kupisa simbi ine zvimwe zvinhu zvakaita sechromium, aluminium, silicon, nezvimwewo, kugadzira imwe-chikamu ferrite kurongeka, ine yakasarudzika kugona kurwisa oxidation uye yakanyanya tembiricha gasi corrosion, asi ine yakaderera tembiricha simba uye hukuru brittleness pakamuri tembiricha. . , Kusagoneka. Iyo pearlite inodzivirira kupisa simbi alloy zvinhu zvakanyanya chromium uye molybdenum, uye iyo yakazara huwandu kazhinji haipfuure 5%.
Kuchengetedzeka kwayo hakusanganisi pearlite, ferrite, uye bainite. Iyi mhando yesimbi ine yakanakisa tembiricha yesimba uye mashandiro anoita pa500 ～ 600 ℃, uye mutengo wakaderera.
Inoshandiswa zvakanyanya kugadzira zvikamu zvinodzivirira kupisa pasi pe600 ℃. Zvakadai semaboiler simbi mapaipi, turbine impellers, rotors, fasteners, high-pressure midziyo, pombi, nezvimwe.
Nguva yekutumira: Ndira-19-2020