Ɔhyew a ɛtaa ba-ɛko tia dade .
Sɛnea wɔde di dwuma su ahorow no kyerɛ no, wɔkyekyɛ dade a ɛko tia ɔhyew mu ma ɛyɛ dade a ɛko tia ɔhyew a oxidation gyina ano sɛ nea wɔde di dwuma titiriw ne ɔhyew ahoɔden dade a ɛwɔ ahoɔden a ɛkorɔn sɛ ade titiriw a wɔde di dwuma.
1 Resistance Oxide Steel Resistance Oxide Steel no mu dodow no ara wɔ carbon quality fraction of high cr steel, high cr ni steel anaasɛ CR{0}}MN dade a ɛkorɔn a egyina Si anaa Al ahosiesie dodow a ɛfata so, titiriw ferric type ne austenitic type abien akuw. Fertin type antioxidant steel, te sɛ 1crl3sial, ne hyew a ɛkorɔn sen biara ne 900℃, a wɔtaa de di dwuma sɛ nozzle, aling stove hood, ne nea ɛkeka ho Austenitic type antioxidant dade, te sɛ 2cr20mn9ni2si2si2si2n ne 3CR8Mnl2Si2N corerm if delesion oxidation oxidation ton ton ton ton ton Resistance ne carburization resistance, na ɛwɔ casting adwumayɛ pa, enti wɔtaa de yɛ castings, nanso nso shear, hot ne cold stamping ne welding.
Antioxide steel no titiriw na wɔde di dwuma ma bere tenten-bere adwuma wɔ ɔhyew a ɛkorɔn mu, nanso mfiridwuma mu su ahorow (ahoɔden, ne nea ɛkeka ho) ahwehwɛde ahorow no nyɛ afã horow a ɛkorɔn, te sɛ gas turbine combustion chamber, roller, furnace tube, heat exchanger, ne nea ɛkeka ho.
2 Wobetumi akyekyɛ ɔhyew ahoɔden dade mu abiɛsa: Ferrite One Bead Hann Nipadua Ɔhyew Ahoɔden dade, martensitic ɔhyew ahoɔden dade, austenitic ɔhyew ahoɔden dade.
A. Dadeɛ a ɛyɛ hyeɛ-a ɛyɛ den no su ne: carbon a ɛba fam, WC .<0.2%; Cr and Si improve the oxidation resistance of steel; Cr, Mo (W) are soluble in ferrite and enhance the recrystallization temperature, thus increasing the creep limit of the matrix; Cr, Mo, V (Ti) strengthen the dispersion.
Ɔhyew ayaresa no: ignition a ɛyɛ daa (950 ~ 1050℃) ne afei 100℃(I. E. 600~750℃). Ntini a ɛteɛ ne fertin + pearlet, na wɔayɛ ɔhyew a ɛkɔ soro a edi hɔ no sɛnea ɛbɛyɛ a ntini no gyina (esiane carbon dispersion precipitation nti) na ama creep resistance atu mpɔn.
Dadeɛ dodoɔ a wɔtaa de di dwuma ne 15 CRMO, 12CR1MOV, 25CR2Mova, ne nea ɛkeka ho, a ɛyɛ low-carbon alloy steel dea. Ne ntrɛwmu nsusuwii ketewa, ɔhyew conductivity pa, wɔ awɔw a eye, thermoplastic processing adwumayɛ ne welding adwumayɛ, adwumayɛ hyew wɔ 450 ~ 550℃, wɔ ɔhyew ahoɔden kɛse. Saa dadeɛ yi yɛ deɛ wɔde di dwuma titire ma nneɛma a wɔyɛ wɔ anyinam ahoɔden adwumayɛbea no so a ɛwɔ adesoa nketenkete, te sɛ nsuo a wɔde yɛ nsuo ne nsuo afiri a ɛwɔ ɔhyeɛ a ɛnyɛ digrii 600 , nsuo afiri foforɔ, nhyɛsoɔ a ɛwɔ nsuo mu, nsuo a ɛyɛ hyew a wɔde yɛ turbine rotor, ne nea ɛkeka ho.
B. Martentic thermal ahoɔden dade su ne: low (medium) carbon, WC{{1}%~0.4%; Wɔ alloy elements a ɛwɔ mu no mu no, wɔde CR a ɛkorɔn di dwuma de ma oxidation resistance a ɛwɔ dade mu no tu mpɔn; Cr, W, Mo, V, (Ti, NB) ne nneɛma afoforo ma nsu a ɛyɛ den a ɛpete ne nea ɛpete no yɛ kɛse; W, MO nso betumi atew tempering fragility no so.
Ɔhyew ayaresa no su ne: Quality Conditioning Treatment + Ɔhyew a ɛkorɔn a ɛyɛ digrii 100 a ɛboro ɔhyew a wɔde di dwuma no so, na ntini a ɛwɔ ne dwumadie tebea mu no yɛ iron nipadua no tempering, sɛnea ɛbɛyɛ a ɛbɛhwɛ sɛ ntini no gyina na ɛyɛ adwuma wɔ ɔhyew a wɔde di dwuma no mu.
Dadeɛ nɔma a wɔtaa de di dwuma ne 1crl3, 2cr13,1crllmov, 1CRL2W.MOV, ne 4CR9Si2,4CR0Si2mo ne dadeɛ foforɔ a wɔde aduru a ɛkorɔn ayɛ. Saa dade a wɔde dum no yi yɛ papa, mframa a ɛma onwini betumi anya martensite. N’adwumayɛ hyew betumi ayɛ 550 ne 600℃, na ɔhyew a ano yɛ den no korɔn sen bead hann nipadua a ɛyɛ hyew no. LCRL 3,2 Crl 3,1CRllmov ne 1CRL2WMOV wɔ creep resistance a ɛkorɔn ne vibration elimination a eye kyɛn so a ɛba fam 500℃, a ɛfata ma steam turbine blades a wɔyɛ, enti wɔsan frɛ no blade steel.4CR9Si2,4CR0si2Mo nso de di dwuma titiriw wɔ engine valve a wɔde di dwuma sen val valve no mu.
C. Austenitic thermal ahoɔden dadeɛ no yɛ nea ɛda adi wɔ carbon a ɛba fam (medium) mu, WC{{1}%~0.4%; na ɛwɔ cr, ni alloy elements a ɛkorɔn. Cr ne ni ma oxidation a ɛko tia no tu mpɔn na ɛma ɔhyew ahoɔden tu mpɔn; CR, W, MO; Cr, W, Mo ne Ti.
Ɔhyew a wɔde yɛ aduru no su ne: solid solution treatment (ɔhyew a ɛboro 1000℃wɔ ngo a ɛyɛ nwini anaa nsu a ɛyɛ nwini akyi) + 60~ 100℃a ɛkorɔn sen ayaresa biako anaa abien a wɔde yɛ onyin, osutɔ fi reinforcing phase no mu, ɛma dade nhyehyɛe no gyina, na ɛma dade ahoɔden a ɛwɔ dade mu no tu mpɔn kɛse. Fa di dwuma tebea mu ntini yɛ austenitic (1 cr14nil4w2mo dade) anaasɛ austenitic plus diffusion precipitated alloy carbide (4CR14nil4W2Mo dade).
Nneɛma a wɔtaa de di dwuma no nɔma ne 1CRL8NI9TI ne 4CRL4NIL4W2MO, na ɔhyew a wɔde di dwuma no fi 600 kosi 700℃. Saa dadeɛ yi na wɔde ka ho a egyina austenitic stainless steel W, MO, V, TL, Ni, AL ne nneɛma foforɔ so, a wɔde hyɛ austenite mu den, ɛyɛ carbide ne dadeɛ a ɛyɛ den, sɛdeɛ ɛbɛyɛ a dadeɛ ahoɔden a ɛkorɔn no bɛtu mpɔn. Esiane sɛ austenite lattice density no yɛ kɛse sen ferrite nti, atom binding tumi no yɛ kɛse, diffusion a alloy elements wɔ austenite yɛ slow, enti saa dade yi ɛnyɛ ɔhyew ahoɔden a ɛkorɔn nko, na mmom ɛkorɔn plasticity, toughness, patability pa, awɔw formability, coupled a biako{111}}Pase austenitic ahyehyɛde, hama.
Antioxidant adwumayɛ hyew a ɛyɛ 1crl8ni9ti dade betumi adu 700 ~ 900℃, na ɛwɔ ɔhyew ahoɔden a ɛdɔɔso wɔ bɛyɛ 600℃, a wobetumi de ayɛ boiler superheater pipe ne titiriw steam pipe a ɛba fam 610℃.4Crl4W2Mo dade wɔ ahoɔden a ɛkorɔn ahoɔden ne nhyehyɛe. Wɔtaa de di dwuma sɛ Ultra-High parameter boiler a ɛwɔ 650℃, superheater pipe a ɛyɛ steam turbine, steam pipe titiriw, ne mu combustion engine exhaust valve, steam anaa gas pipe a ɛwɔ ɔhyew a ɛyɛ adwuma wɔ 650 ~ 750℃.
