20G: Nws yog cov npe steel naj npawb ntawm GB5310-95 (cov npe txawv teb chaws: st45.8 hauv lub teb chaws Yelemees, STB42 hauv Nyiv, thiab SA106B hauv Tebchaws Meskas). Nws yog feem ntau siv steel rau boiler steel kav. Cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab yog qhov zoo ib yam li ntawm 20 steel phaj. Cov hlau muaj qee lub zog ntawm qhov kub thiab txias thiab nruab nrab thiab kub, cov ntsiab lus carbon tsawg, zoo plasticity thiab toughness, thiab zoo txias thiab kub sib sau thiab vuam zog. Nws yog tsuas yog siv los tsim cov high-pressure thiab siab dua-parameter boiler yeeb nkab fittings, superheaters, reheaters, economizers thiab dej phab ntsa nyob rau hauv lub qis-kub seem; xws li cov kav dej me me rau cov kav dej cua sov nrog cov phab ntsa kub ntawm ≤500 ℃, thiab cov phab ntsa dej Cov kav dej, cov kav dej siv nyiaj, thiab lwm yam, cov kav dej loj rau cov kav dej thiab cov taub hau (economizer, dej phab ntsa, low-temperature superheater thiab reheater header) nrog phab ntsa kub ≤ 450 ℃, thiab cov kav dej nrog nruab nrab kub ≤ 450 ℃ Accessories thiab lwm yam. Txij li cov hlau yuav raug graphitized yog tias nws ua haujlwm ntev tshaj 450 ° C, lub sijhawm ntev tshaj plaws ntawm cov cua sov. Lub raj nplaim yog qhov zoo tshaj plaws txwv rau qis dua 450 ° C. Nyob rau hauv qhov kub thiab txias, lub zog ntawm cov hlau tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm superheaters thiab chav kav dej, thiab nws muaj qhov zoo oxidation tsis kam, yas toughness, vuam kev ua tau zoo thiab lwm yam kub thiab txias ua haujlwm, thiab nws yog dav siv. Cov hlau siv nyob rau hauv Iranian rauv (xa mus rau ib chav tsev) yog cov kav dej phwj dej (qhov muaj nuj nqis yog 28 tons), cov kav dej qhia cov yeeb nkab (20 tons), cov kav dej sib txuas (26 tons), thiab cov khoom siv nyiaj txiag. (8 tons). ), desuperheating dej system (5 tons), tus so yog siv raws li cov hlau ca thiab boom cov ntaub ntawv (kwv yees li 86 tons).

SA-210C (25MnG): Nws yog qib steel hauv ASME SA-210 tus qauv. Nws yog carbon-manganese steel me me-inch raj rau boilers thiab superheaters, thiab itis ib pearlite tshav kub-lub zog hlau. Tuam Tshoj tau hloov nws mus rau GB5310 hauv xyoo 1995 thiab muab nws lub npe 25MnG. Nws cov tshuaj muaj pes tsawg leeg yog qhov yooj yim tshwj tsis yog rau cov ntsiab lus siab ntawm carbon thiab manganese, tus so zoo ib yam li 20G, yog li nws lub zog tawm los yog li 20% siab dua 20G, thiab nws cov plasticity thiab toughness yog sib npaug rau 20G. Cov hlau muaj cov txheej txheem tsim khoom yooj yim thiab ua haujlwm txias thiab kub ua haujlwm. Siv nws los ntawm 20G tuaj yeem txo cov phab ntsa tuab thiab cov khoom siv, Meanwhile txhim kho cov cua sov hloov ntawm lub boiler. Nws siv thiab siv qhov kub thiab txias yog qhov zoo ib yam li 20G, feem ntau yog siv rau phab ntsa dej, kev lag luam, tsis tshua muaj kub superheater thiab lwm yam khoom uas nws ua haujlwm kub qis dua 500 ℃.

SA-106C: Nws yog qib steel hauv ASME SA-106 tus qauv. Nws yog carbon-manganese steel yeeb nkab rau loj-caliber boilers thiab superheaters rau kub. Nws cov tshuaj muaj pes tsawg leeg yog yooj yim thiab zoo ib yam li 20G carbon steel, tab sis nws cov pa roj carbon thiab manganese cov ntsiab lus siab dua, yog li nws lub zog tawm los yog li 12% siab dua li ntawm 20G, thiab nws cov yas thiab tawv tsis zoo. Cov hlau muaj cov txheej txheem tsim khoom yooj yim thiab ua haujlwm txias thiab kub ua haujlwm. Siv nws los hloov 20G headers (economizer, dej phab ntsa, low-temperature superheater thiab reheater header) tuaj yeem txo cov phab ntsa thickness li ntawm 10%, uas tuaj yeem txuag cov nqi khoom, txo cov khoom siv vuam, thiab txhim kho headers Qhov kev ntxhov siab sib txawv ntawm qhov pib. .

15Mo3 (15MoG): Nws yog cov yeeb nkab steel hauv DIN17175 tus qauv. Nws yog ib txoj kab me me carbon-molybdenum steel raj rau boiler superheater, Meanwhile nws yog pearlitic tshav kub-lub zog hlau. Tuam Tshoj tau hloov nws mus rau GB5310 hauv 1995 thiab muab nws lub npe 15MoG. Nws cov tshuaj muaj pes tsawg leeg yog yooj yim, tab sis nws muaj molybdenum, yog li thaum tswj cov txheej txheem kev ua tau zoo ib yam li carbon steel, nws lub zog thermal zoo dua li carbon hlau. Vim nws qhov kev ua tau zoo thiab tus nqi qis, nws tau txais los ntawm cov teb chaws thoob plaws ntiaj teb. Txawm li cas los xij, cov hlau muaj qhov nyiam ntawm graphitization hauv kev ua haujlwm ntev ntawm qhov kub siab, yog li nws siv qhov kub thiab txias yuav tsum tau tswj hauv qab 510 ℃, thiab cov nyiaj Al ntxiv thaum smelting yuav tsum txwv kom tswj thiab ncua cov txheej txheem graphitization. Cov yeeb nkab steel no tsuas yog siv rau qhov kub thiab txias superheaters thiab qis-kub reheaters, thiab phab ntsa kub yog qis dua 510 ℃. Nws cov tshuaj muaj pes tsawg leeg yog C0.12-0.20, Si0.10-0.35, Mn0.40-0.80, S≤0.035, P≤0.035, Mo0.25-0.35; Qhov hluav taws kub zoo li qub theem σs≥270-285, σb≥450- 600 MPa; Plasticity ≥22.

SA-209T1a (20MoG): Nws yog qib steel hauv ASME SA-209 tus qauv. Nws yog ib txoj kab me me carbon-molybdenum steel raj rau boilers thiab superheaters, thiab nws yog pearlite tshav kub-lub zog hlau. Tuam Tshoj hloov nws mus rau GB5310 hauv 1995 thiab muab nws lub npe 20MoG. Nws cov tshuaj muaj pes tsawg leeg yog yooj yim, tab sis nws muaj molybdenum, yog li thaum tswj cov txheej txheem kev ua tau zoo ib yam li carbon steel, nws lub zog thermal zoo dua li carbon hlau. Txawm li cas los xij, cov hlau muaj kev nyiam ua rau graphitize hauv kev ua haujlwm ntev ntawm qhov kub thiab txias, yog li nws siv qhov kub thiab txias yuav tsum tau tswj hauv qab 510 ℃ thiab tiv thaiv kub dhau. Thaum smelting, tus nqi ntawm Al ntxiv yuav tsum tau txwv rau kev tswj thiab ncua cov txheej txheem graphitization. Cov yeeb nkab steel no tsuas yog siv rau qhov chaw xws li cov phab ntsa dej txias, superheaters thiab reheaters, thiab cov phab ntsa kub qis dua 510 ℃. Nws cov tshuaj muaj pes tsawg leeg yog C0.15-0.25, Si0.10-0.50, Mn0.30-0.80, S≤0.025, P≤0.025, Mo0.44-0.65; normalized zog theem σs≥220, σb≥415 MPa; plasticity ≥30.

15CrMoG: yog GB5310-95 steel qib (xws li 1Cr-1/2Mo thiab 11/4Cr-1/2Mo-Si steels dav siv nyob rau hauv ntau lub teb chaws thoob ntiaj teb). Nws cov ntsiab lus chromium siab dua li ntawm 12CrMo steel, yog li nws muaj zog thermal zog dua. Thaum qhov kub siab tshaj 550 ℃, nws lub zog thermal yog txo qis. Thaum nws ua haujlwm ntev ntawm 500-550 ℃, graphitization yuav tsis tshwm sim, tab sis carbide spheroidization thiab redistribution ntawm alloying ntsiab yuav tshwm sim, uas tag nrho cov ua rau lub tshav kub ntawm hlau. Lub zog yog txo, thiab cov hlau muaj kev so zoo ntawm 450 ° C. Nws cov yeeb nkab ua thiab vuam txheej txheem kev ua tau zoo. Feem ntau yog siv los ua cov kav dej kub thiab nruab nrab siab thiab cov taub hau nrog cov dej tsis zoo hauv qab 550 ℃, superheater raj nrog lub raj phab ntsa kub hauv qab 560 ℃, thiab lwm yam. Nws cov tshuaj muaj pes tsawg leeg yog C0.12-0.18, Si0.17-0.37, Mn0.40- 0.70, S≤0.030, P≤0.030, Cr0.80-1.10, Mo0.40-0.55; lub zog theem σs≥ nyob rau hauv lub xeev tempered 235, σb≥440-640 MPa; Plasticity ≥21.

T22 (P22), 12Cr2MoG: T22 (P22) yog ASME SA213 (SA335) cov ntaub ntawv txheem, uas tau teev nyob rau hauv Tuam Tshoj GB5310-95. Hauv Cr-Mo steel series, nws lub zog thermal kuj yog qhov siab, thiab nws lub zog ua haujlwm ntev thiab tso cai rau kev ntxhov siab ntawm qhov kub thiab txias yog siab dua li ntawm 9Cr-1Mo steel. Yog li ntawd, nws yog siv nyob rau hauv txawv teb chaws thermal zog, nuclear zog thiab siab hlab ntsha. Ntau yam kev siv. Tab sis nws cov kev lag luam kev lag luam tsis zoo li kuv lub teb chaws 12Cr1MoV, yog li nws siv tsawg dua hauv kev tsim hluav taws xob hauv tsev thermal boiler. Nws tsuas yog tau txais thaum tus neeg siv thov nws (tshwj xeeb tshaj yog thaum nws tsim thiab tsim raws li ASME specifications). Cov hlau tsis rhiab rau kev kho cua sov, muaj cov yas ruaj khov thiab zoo vuam kev ua tau zoo. T22 cov raj me me feem ntau yog siv los ua cov raj cua sov rau cov superheaters thiab cov reheaters uas nws cov phab ntsa hlau kub qis dua 580 ℃, thaum P22 loj-inch raj feem ntau yog siv rau superheater / reheater pob qij txha uas nws cov phab ntsa hlau kub tsis tshaj 565 ℃. Lub thawv thiab lub ntsiab chav yeeb nkab. Nws cov tshuaj muaj pes tsawg leeg yog C≤0.15, Si≤0.50, Mn0.30-0.60, S≤0.025, P≤0.025, Cr1.90-2.60, Mo0.87-1.13; lub zog theem σs≥280, σb≥ nyob rau hauv zoo tempering 450-600 MPa; Plasticity ≥20.

12Cr1MoVG: Nws yog GB5310-95 cov npe hlau, uas yog siv dav hauv kev siv hluav taws xob hauv tsev, siab siab siab, thiab lub zog hluav taws xob subcritical boiler superheaters, headers thiab cov kav dej loj. Cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab yog qhov zoo ib yam li cov ntawv 12Cr1MoV. Nws cov tshuaj muaj pes tsawg leeg yog qhov yooj yim, tag nrho cov ntsiab lus alloy tsawg dua 2%, thiab nws yog cov pa roj carbon tsawg, tsis tshua muaj alloy pearlite kub-lub zog hlau. Ntawm lawv, vanadium tuaj yeem tsim ib qho ruaj khov carbide VC nrog cov pa roj carbon, uas tuaj yeem ua rau cov chromium thiab molybdenum nyob rau hauv cov hlau nyiam muaj nyob rau hauv ferrite, thiab ua kom qeeb ntawm kev hloov ceev ntawm chromium thiab molybdenum los ntawm ferrite mus rau carbide, ua rau cov hlau ntau dua. ruaj khov ntawm qhov kub thiab txias. Tag nrho cov ntsiab lus ntawm alloying ntsiab nyob rau hauv cov hlau no tsuas yog ib nrab ntawm 2.25Cr-1Mo steel dav siv nyob rau hauv txawv teb chaws, tab sis nws endurance lub zog ntawm 580 ℃ thiab 100,000 h yog 40% siab dua tom kawg; thiab nws cov txheej txheem ntau lawm yog qhov yooj yim, thiab nws qhov kev ua haujlwm vuam yog qhov zoo. Ntev npaum li cov txheej txheem kev kho cua sov yog nruj, kev ua tau zoo tag nrho thiab thermal zog tuaj yeem tau txais. Kev ua haujlwm tiag tiag ntawm lub chaw nres tsheb fais fab qhia tau hais tias 12Cr1MoV lub kav dej tseem ceeb tuaj yeem siv txuas ntxiv tom qab 100,000 teev ntawm kev nyab xeeb ntawm 540 ° C. Cov kav dej loj loj yog siv los ua cov taub hau thiab cov kav dej loj nrog cov kav dej tsis muaj zog hauv qab 565 ℃, thiab cov kav dej me me yog siv rau boiler cua sov cov kav dej nrog hlau phab ntsa kub hauv qab 580 ℃.

12Cr2MoWVTiB (G102): Nws yog qib steel hauv GB5310-95. Nws yog ib qho qis-carbon, low-alloy (me me ntawm ntau yam) bainite kub-lub zog steel tsim thiab tsim los ntawm kuv lub teb chaws nyob rau hauv 1960s. Nws tau suav nrog hauv Ministry of Metallurgy Standard YB529 txij li xyoo 1970s -70 thiab tam sim no lub teb chaws tus qauv. Thaum kawg ntawm xyoo 1980, cov hlau tau dhau los ntawm kev sib koom ua ke ntawm Ministry of Metallurgy, Ministry of Machinery thiab Hluav Taws Xob. Cov hlau muaj cov khoom zoo txhua yam, thiab nws lub zog thermal thiab kev pabcuam kub tshaj qhov zoo sib xws ntawm cov hlau txawv teb chaws, mus txog qib ntawm qee cov chromium-nickel austenitic steels ntawm 620 ℃. Qhov no yog vim muaj ntau hom alloying ntsiab muaj nyob rau hauv cov hlau, thiab cov ntsiab lus xws li Cr, Si, thiab lwm yam uas txhim kho oxidation kuj tseem ntxiv, yog li qhov kev pabcuam siab tshaj plaws tuaj yeem ncav cuag 620 ° C. Kev ua haujlwm tiag tiag ntawm qhov chaw nres tsheb fais fab tau pom tias lub koom haum thiab kev ua haujlwm ntawm cov yeeb nkab steel tsis hloov ntau tom qab ua haujlwm ntev. Feem ntau yog siv los ua superheater raj thiab reheater raj ntawm super siab parameter boiler nrog hlau kub ≤620 ℃. Nws cov tshuaj muaj pes tsawg leeg yog C0.08-0.15, Si0.45-0.75, Mn0.45-0.65, S≤0.030, P≤0.030, Cr1.60-2.10, Mo0.50-0.65, V0.28-0.42, Ti0. 08 -0.18, W0.30-0.55, B0.002-0.008; lub zog theem σs≥345, σb≥540-735 MPa nyob rau hauv zoo tempering xeev; plasticity ≥18.

SA-213T91 (335P91): Nws yog qib steel hauv ASME SA-213 (335) tus qauv. Nws yog cov khoom siv rau qhov kub-siab qhov chaw ntawm lub zog nuclear (tseem siv rau lwm qhov chaw) tsim los ntawm Rubber Ridge National Laboratory ntawm Tebchaws Meskas. Cov hlau yog raws li T9 (9Cr-1Mo) steel, thiab tsuas yog txwv rau sab sauv thiab qis ntawm cov ntsiab lus carbon. , Thaum tswj nruj dua cov ntsiab lus ntawm cov khoom seem xws li P thiab S, ib txoj kab ntawm 0.030-0.070% ntawm N, ib txoj kab ntawm cov carbide muaj zog tsim cov ntsiab lus ntawm 0.18-0.25% ntawm V thiab 0.06-0.10% ntawm Nb ntxiv rau ua tiav refinement Hom tshiab ntawm ferritic tshav kub-resistant alloy steel yog tsim los ntawm cov nplej yuav tsum tau; nws yog ASME SA-213 teev cov qib steel, thiab Tuam Tshoj tau hloov cov hlau mus rau GB5310 tus qauv hauv xyoo 1995, thiab qib tau teeb tsa raws li 10Cr9Mo1VNb; thiab cov txheej txheem thoob ntiaj teb ISO / DIS9329-2 tau teev tseg raws li X10 CrMoVNb9-1. Vim nws cov ntsiab lus chromium siab (9%), nws cov oxidation tsis kam, corrosion kuj, siab kub zog thiab tsis-graphitization tendencies zoo dua li cov hlau tsis tshua muaj hlau. Lub caij molybdenum (1%) feem ntau txhim kho qhov kub thiab txias zog thiab inhibits chromium hlau. Kub brittleness nyiam; Piv nrog T9, nws tau txhim kho vuam kev ua tau zoo thiab thermal qaug zog kev ua tau zoo, nws cov kav ntev ntawm 600 ° C yog peb zaug ntawm qhov kawg, thiab tswj qhov kub siab corrosion kuj ntawm T9 (9Cr-1Mo) steel; Piv nrog rau austenitic stainless hlau, nws muaj me me expansion coefficient, zoo thermal conductivity, thiab siab endurance zog (piv txwv li, piv nrog TP304 austenitic steel, tos kom txog thaum lub zog kub yog 625 ° C, thiab qhov sib npaug ntawm kev ntxhov siab yog 607 ° C) . Yog li ntawd, nws muaj cov cuab yeej zoo txhua yam, cov qauv ruaj khov thiab kev ua haujlwm ua ntej thiab tom qab kev laus, kev ua haujlwm vuam zoo thiab cov txheej txheem kev ua haujlwm, siab ua haujlwm ntev thiab oxidation tsis kam. Feem ntau yog siv rau superheaters thiab reheaters nrog hlau kub ≤650 ℃ hauv boilers. Nws cov tshuaj muaj pes tsawg leeg yog C0.08-0.12, Si0.20-0.50, Mn0.30-0.60, S≤0.010, P≤0.020, Cr8.00-9.50, Mo0.85-1.05, V0.18-0.25, Al≤ 0.04, Nb0.06-0.10, N0.03-0.07; lub zog theem σs≥415, σb≥585 MPa nyob rau hauv lub zoo tempering lub xeev; plasticity ≥20.