15Mo3 (15MoG): Nws yog cov yeeb nkab hlau hauv tus qauv DIN17175. Nws yog cov yeeb nkab hlau carbon molybdenum me me rau boiler thiab superheater, thiab yog cov hlau kub pearlescent. Xyoo 1995, nws tau hloov mus rauGB5310thiab hu ua 15MoG. Nws cov tshuaj lom neeg muaj pes tsawg leeg yooj yim, tab sis nws muaj molybdenum, yog li nws muaj zog thermal zoo dua li cov hlau carbon thaum tswj cov txheej txheem ua tau zoo ib yam li cov hlau carbon. Vim nws qhov kev ua tau zoo, tus nqi pheej yig, tau siv dav hauv ntiaj teb. Txawm li cas los xij, cov hlau muaj qhov nyiam graphitization tom qab ua haujlwm ntev ntawm qhov kub siab, yog li nws qhov kub ua haujlwm yuav tsum tswj tau qis dua 510 ℃, thiab qhov ntau ntawm Al ntxiv rau hauv smelting yuav tsum txwv rau kev tswj thiab ncua cov txheej txheem graphitization. Cov raj hlau no feem ntau yog siv rau lub tshuab cua sov qis thiab lub tshuab cua sov qis. Qhov kub ntawm phab ntsa qis dua 510 ℃. Nws cov tshuaj lom neeg muaj pes tsawg leeg C0.12-0.20, SI0.10-0.35, MN0.40-0.80, S≤0.035, P≤0.035, MO0.25-0.35; Lub zog ib txwm muaj σs≥270-285, σb≥450-600 MPa; Yas delta 22 lossis siab dua.

15CrMoG:GB5310-95 hlau (sib raug rau 1CR-1/2Mo thiab 11/4CR-1/2MO-Si hlau siv dav hauv ntiaj teb), nws cov ntsiab lus chromium siab dua 12CrMo hlau, yog li nws muaj lub zog thermal siab dua ntawm 500-550 ℃. Thaum qhov kub tshaj 550 ℃, lub zog thermal ntawm cov hlau txo qis heev. Thaum nws ua haujlwm ntev ntawm 500-550 ℃, graphitization tsis tshwm sim, tab sis carbide spheroidization thiab alloying element redistribution tshwm sim, uas ua rau lub zog thermal ntawm cov hlau txo qis. Cov hlau muaj kev tiv thaiv zoo rau kev so ntawm 450 ℃. Nws cov yeeb nkab ua thiab vuam txheej txheem kev ua tau zoo. Nws feem ntau yog siv ua cov kav dej siab thiab nruab nrab thiab lub thawv txuas nrog cov pa ntsuas qis dua 550 ℃, lub raj superheater nrog phab ntsa kub qis dua 560 ℃, thiab lwm yam. Nws cov tshuaj lom neeg muaj pes tsawg leeg 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; Nyob rau hauv ib txwm tempering mob, lub zog theem σs≥235, σb≥440-640 MPa; Yas delta p 21.

T22 (P22), 12Cr2MoG: T22 (P22) yogASME SA213 (SA335) cov ntaub ntawv code, uas suav nrog hauvGB5310-95. Hauv CR-Mo steel series, nws lub zog thermal ua tau zoo heev, tib lub zog kub thiab kev ntxhov siab tso cai dua li 9CR-1Mo steel txawm tias siab dua, yog li nws siv dav hauv kev siv hluav taws xob thermal txawv teb chaws, hluav taws xob nuclear thiab cov hlab siab. Txawm li cas los xij, nws txoj kev lag luam tsis zoo li peb 12Cr1MoV, yog li nws tsis tshua siv hauv kev tsim hluav taws xob thermal hauv tsev. Siv tsuas yog thaum xav tau (tshwj xeeb tshaj yog thaum tsim thiab tsim raws li ASME code). Cov hlau tsis muaj kev cuam tshuam rau kev kho cua sov thiab muaj kev ua tau zoo thiab kev vuam zoo. T22 lub raj me me feem ntau yog siv ua lub raj cua sov saum npoo av hauv qab 580 ℃ superheater thiab reheater, thiab lwm yam.P22Lub raj loj uas siv rau hauv phab ntsa hlau uas kub tsis tshaj 565 ℃, lub thawv txuas superheater/reheater thiab lub raj xa dej loj. Nws cov tshuaj lom neeg muaj pes tsawg leeg C≤0.15, Si≤0.50, MN0.30-0.60, S≤0.025, P≤0.025, CR1.90-2.60, MO0.87-1.13; Nyob rau hauv ib txwm tempering, lub zog theem σs≥280, σb≥450-600 MPa; Yas delta 20 lossis ntau dua.

12Cr1MoVG:GB5310-95 nano txheem hlau, yog cov hlau siv hauv tsev siab, siab heev, subcritical fais fab nroj tsuag boiler superheater, lub thawv sau thiab lub raj xa dej loj. Cov tshuaj lom neeg sib xyaw thiab cov khoom siv kho tshuab ntawm 12Cr1MoV phaj yog qhov zoo ib yam. Nws cov tshuaj lom neeg sib xyaw yooj yim, tag nrho cov ntsiab lus alloy yog tsawg dua 2%, rau cov pa roj carbon tsawg, cov hlau kub muaj zog pearlescent qis. Vanadium tuaj yeem tsim cov carbide VC ruaj khov nrog carbon, uas tuaj yeem ua rau chromium thiab molybdenum hauv hlau feem ntau muaj nyob hauv ferrite, thiab qeeb qeeb qhov hloov pauv ntawm chromium thiab molybdenum los ntawm ferrite mus rau carbide, yog li cov hlau ruaj khov dua ntawm qhov kub siab. Tag nrho cov ntsiab lus alloyed hauv cov hlau no tsuas yog ib nrab ntawm 2.25 CR-1Mo hlau siv dav hauv txawv teb chaws, tab sis lub zog ruaj khov ntawm 580 ℃ thiab 100,000 h yog 40% siab dua li ntawm qhov kawg. Ntxiv mus, cov txheej txheem tsim khoom yooj yim thiab kev ua haujlwm vuam zoo. Tsuav yog cov txheej txheem kho cua sov nruj heev, qhov kev ua tau zoo thiab lub zog thermal tuaj yeem txaus siab. Kev ua haujlwm tiag tiag ntawm lub chaw fais fab qhia tau hais tias 12Cr1MoV lub raj xa dej tseem ceeb tseem siv tau tom qab kev ua haujlwm zoo ntawm 540 ℃ rau 100,000 teev. Lub raj loj-txoj kab uas hla feem ntau yog siv ua lub thawv sau thiab lub raj xa dej tseem ceeb ntawm cov pa dej hauv qab 565 ℃, thiab lub raj me-txoj kab uas hla yog siv rau lub raj cua sov ntawm lub boiler ntawm phab ntsa hlau kub hauv qab 580 ℃.

12Cr2MoWVTiB (G102):Gb5310-95 hauv cov hlau, rau Tuam Tshoj txoj kev loj hlob hauv xyoo 1960, cov pa roj carbon tsawg, cov hlau tsis tshua muaj (me me ntawm ntau haiv neeg) Bainite hom hlau kub muaj zog, txij li xyoo 1970 tau suav nrog hauv Ministry of Metallurgical Industry tus qauv YB529-70 thiab tam sim no tus qauv hauv tebchaws, thaum kawg ntawm xyoo 1980 cov hlau los ntawm Ministry of Metallurgical Industry, Ministry of Machinery thiab Ministry of electric power sib koom ua ke. Cov hlau muaj cov khoom siv kho tshuab zoo, thiab nws lub zog thermal thiab kev pabcuam kub siab dua li cov hlau zoo sib xws txawv teb chaws, mus txog qib ntawm qee cov hlau chromium-nickel austenitic ntawm 620 ℃. Qhov no yog vim tias cov hlau muaj ntau hom alloying ntsiab lus, thiab kuj ntxiv rau kev txhim kho qhov tsis kam oxidation ntawm cov ntsiab lus xws li Cr, Si, yog li qhov kub siab tshaj plaws tuaj yeem ncav cuag 620 ℃. Kev ua haujlwm tiag tiag ntawm lub chaw nres tsheb fais fab qhia tau hais tias cov qauv thiab cov khoom ntawm cov yeeb nkab hlau tsis hloov pauv ntau tom qab kev ua haujlwm ntev. Nws yog siv los ua lub raj xa dej kub thiab lub raj xa dej rov ua kom sov rau lub boiler kub siab heev nrog cov hlau kub ≤620 ℃. Nws cov tshuaj lom neeg muaj pes tsawg leeg 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; Nyob rau hauv ib txwm tempering mob, lub zog theem σs≥345, σb≥540-735 MPa; Yas delta p 18.

Sa-213t91 (335P91) : Tus lej hlau hauvASME SA-213(335) tus qauv. Yog tsim los ntawm Rubber Ridge National Laboratory ntawm Tebchaws Meskas, siv rau hauv lub zog nuclear (kuj tseem siv tau rau lwm yam) cov khoom siv kub siab, cov hlau yog raws li T9 (9CR-1MO) hlau, hauv qhov txwv ntawm cov ntsiab lus carbon, tswj cov ntsiab lus ntawm P thiab S thiab lwm yam khoom seem tib lub sijhawm, Ib hom tshiab ntawm ferritic cua sov-resistant alloy hlau tau tsim los ntawm kev ntxiv cov nyiaj ntawm 0.030-0.070% N, 0.18-0.25% V thiab 0.06-0.10% Nb kom ua tau raws li qhov yuav tsum tau ua ntawm cov noob refinement. Nws yogASME SA-213cov hlau txheem kem, uas tau hloov mus rau hauvGB5310tus qauv xyoo 1995 thiab qib yog 10Cr9Mo1VNb. Tus qauv thoob ntiaj teb ISO / DIS9399-2 yog teev raws li X10 CRMOVNB9-1.

Vim nws muaj cov chromium ntau (9%), nws txoj kev tiv thaiv oxidation, tiv thaiv corrosion, lub zog kub siab thiab tsis-graphitization zoo dua li cov hlau tsis tshua muaj alloy. Molybdenum (1%) feem ntau txhim kho lub zog kub siab thiab tiv thaiv qhov kub embrittling ntawm chromium hlau. Piv nrog T9, cov khoom vuam thiab thermal nkees tau zoo dua, lub zog ruaj khov ntawm 600 ℃ yog peb zaug ntawm qhov kawg, thiab T9 (9CR-1Mo) hlau zoo heev tiv thaiv corrosion kub siab. Piv nrog austenitic stainless hlau, cov coefficient nthuav dav yog me me, thermal conductivity zoo, thiab muaj lub zog ruaj khov dua (xws li nrog TP304 austenitic hlau piv, kom txog thaum qhov kub muaj zog yog 625 ℃, qhov kub ntxhov siab sib npaug yog 607 ℃). Yog li ntawd, nws muaj cov khoom siv kho tshuab zoo dua, cov qauv ruaj khov thiab cov khoom ua ntej thiab tom qab laus, cov khoom vuam thiab cov txheej txheem zoo, lub zog ruaj khov thiab kev tiv thaiv oxidation. Nws feem ntau yog siv rau superheater thiab reheater nrog hlau kub ≤650 ℃ hauv boiler. Nws cov tshuaj lom neeg muaj pes tsawg leeg 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; Nyob rau hauv ib txwm tempering mob, lub zog theem σs≥415, σb≥585 MPa; Yas delta 20 lossis ntau dua.