DIN 17175 10CrMo9-10 yog dab tsi
10CrMo9-10 yog seamless raj qib ntawm chromium-molybdenum tshav kub resistant steel, standardized Ameslikas nyob rau hauv DIN 17175, tus qauv German rau seamless hlab ntawm tshav kub resistant steels, nyob rau hauv cov ntaub ntawv tooj 1.7380. DIN 17175 tau raug tshem tawm thiab hloov los ntawm DIN EN 10216-2, thiab kev xaiv qib tau raug coj mus rau hauv cov qauv European, qhov twg nws tau sau ua 10CrMo9-10 nrog tib cov ntaub ntawv tus lej. Qhov kev xaiv ua raws li cov lus sau tseg hauv German qub, qhia txog kwv yees li 0.10 feem pua carbon ua ke nrog chromium thiab molybdenum ntxiv nyob rau hauv nominal 2.25 rau 1 feem pua, thiab nws yog qhov tseeb tsom xam hauv tus qauv uas tswj cov khoom.
Hauv kev xyaum, cov hlau yog cov classic 2.25 feem pua chromium thiab 1 feem pua molybdenum (2.25Cr-1Mo) alloy siv thoob plaws hauv lub zog thiab txheej txheem kev lag luam. Nws yog piav raws li pearlitic los yog bainitic tshav kub resistant steel, ferritic nyob rau hauv cov qauv, thiab nws yog xaiv vim hais tias nws creep rupture zog tseem pab tau thaum carbon steel thiab 1.25Cr-0.5Mo steel tau khiav tawm ntawm kev nyuaj siab.
Tshuaj muaj pes tsawg leeg
| Element | Hom specification ntau yam | Muaj nuj nqi |
|---|---|---|
| Cov pa roj carbon | 0.08 - 0.14 feem pua | Lub zog thiab hardenability |
| Silicon | 0.50% siab tshaj | Deoxidation |
| Manganese | 0.40 - 0.70 feem pua | Lub zog, deoxidation |
| Phosphorus | 0.025% siab tshaj | Txwv rau toughness thiab creep ductility |
| Sulfur | 0.020% siab tshaj | Txwv rau kub ductility |
| Chromium | 2.00 - 2.50 feem pua | Oxidation kuj thiab creep zog |
| Molybdenum | 0.90 - 1.10 feem pua | Kev daws teeb meem muaj zog, creep kuj |
Chromium muab oxidation thiab scaling kuj ntawm qhov kub thiab txias, thiab molybdenum nce lub creep rupture lub zog los ntawm cov khoom siv ntxiv dag zog thiab los ntawm stabilizing carbides. Cov ntsiab lus ntawm cov pa roj carbon monoxide yog txhob txwm tshaj tawm kom tsis txhob muaj kev sib txuas thiab nkag mus rau cov khoom siv tau thaum tseem tso cai rau cov carbide tsim cov ntsiab lus los ua lawv txoj haujlwm.
Kev kho cua sov thiab kev coj tus cwj pwm
Qib yog muab nyob rau hauv lub normalized thiab tempered mob, qee zaus nyob rau hauv lub quenched thiab tempered mob rau tej yam kev pom zoo engineering. Normalizing kev kho cua sov yog nqa tawm nyob rau hauv ntau yam raug rau no alloy, ua raws li los ntawm tempering ntawm ib tug kub siab tshaj qhov kev pab cuam kub kom lub microstructure thiab, nrog rau nws, cov creep zog nyob ruaj khov nyob rau hauv kev pab cuam. Lub raj feem ntau muab cov khoom kub tiav, nrog rau cov khoom txias tiav muaj rau cov kab me me uas qhov ntsuas qhov ntev yog nruj dua.
Nyob rau hauv chav tsev kub lub alloy coj li ib tug nruab nrab lub zog steel; ntawm qhov kev pab cuam kub nws qhov zoo dua yog cov ntaub ntawv pov thawj ruaj khov thiab creep rupture lub zog, uas yog qhov tsim kev suav siv. Rau kev taw qhia tawm tsam Asmeskas cov txheej txheem, ASME A335 qib P22, UNS K21590, qhia txog lub zog tensile yam tsawg kawg nkaus ntawm 415 MPa thiab lub zog qis kawg nkaus ntawm 205 MPa ntawm chav tsev kub, thiab qib EN zaum hauv tib lub cuab yeej. Qhov twg ib qhov project sib xyaw cov lej, cov lus qhia sib npaug yuav tsum tau txais kev txhawb nqa los ntawm cov ntaub ntawv pov thawj tiag tiag es tsis yog los ntawm kev xaiv ib leeg.
Cov Kev Pabcuam
Cov ntawv thov yog superheater thiab reheater tube banks, chav headers, lub ntsiab chav piping thiab kub reheat kab yeeb nkab nyob rau hauv fossil raug rho tawm boilers, ua ke nrog kub siab chav thiab hydrogen kev pab cuam piping nyob rau hauv petrochemical nroj tsuag. Cov qib kuj tseem siv rau hauv cov cua kub exchanger tubing qhov twg cov txheej txheem sab kub tshaj qhov ntau ntawm cov hlau tsis tshua muaj hlau. Kev txwv qhov kub thiab txias yog tsim los ntawm cov qauv tsim qauv thiab los ntawm cov ntaub ntawv nkag hauv cov ntaub ntawv cov ntaub ntawv es tsis yog los ntawm cov qauv khoom ib leeg, thiab hauv German xyaum VdTUEV cov ntaub ntawv cov ntaub ntawv cov ntaub ntawv tau ib txwm muab cov txiaj ntsig zoo siv hauv kev tsim.
Vim hais tias cov hlab ua haujlwm nyob rau hauv qhov tob, qhov kev xav tau poob rau ntawm cov ntaub ntawv kho cua sov, qhov loj ntawm cov nplej thiab cov ntaub ntawv xeem nkag es tsis yog nyob rau hauv chav tsev - qhov ntsuas kub tensile ib leeg. Cov neeg yuav khoom ib txwm xav tau qhov normalizing thiab tempering kub ntawm daim ntawv pov thawj, ib qho kev siv rau cov ntaub ntawv creep siv, thiab rau header daim ntaub ntawv ib tug ultrasonic los yog eddy tam sim no kuaj ntawm tag nrho ntev.
Cov lus nug nquag
Q:Puas yog 10CrMo9-10 tib yam li A335 P22?
A: Lawv yog cov neeg sib tw ze ntawm tib tsev neeg 2.25Cr-1Mo, tab sis lawv yog cov qauv sib cais nrog cov rooj sib cais, yog li yuav tsum muaj daim ntawv pov thawj tiag tiag ua ntej lawv raug kho raws li kev hloov pauv.
Q:Cov khoom siv ntawm 10CrMo9-10 yog dab tsi?
A: 1.7380, uas yog tus lej Werkstoff uas tshwm nyob rau hauv European daim ntawv pov thawj zeb nrog rau qib kev xaiv.
Q:Hauv qhov xwm txheej twg yog lub raj xa khoom?
A: Feem ntau nyob rau hauv lub normalized thiab tempered mob, nrog rau kev kho cua sov kub kaw nyob rau hauv lub soj ntsuam daim ntawv pov thawj vim hais tias cov creep zog nyob ntawm nws.
Q:Vim li cas molybdenum ntxiv txog li 1 feem pua?
A: Molybdenum nce creep rupture lub zog los ntawm cov khoom siv ntxiv dag zog thiab tsim carbide, uas yog qhov tso cai rau qib ua haujlwm siab tshaj qhov ntsuas kub ntawm carbon steel.
Q:Cov ntawv thov twg feem ntau qhia txog qib no?
A: Superheater thiab reheater tubes, chav headers thiab cov kav dej loj hauv lub hwj chim boilers, thiab cov kav dej kub hauv cov txheej txheem.
Q:Puas yog tus qauv tseem DIN 17175?
A: Tsis yog DIN 17175 tau raug tshem tawm thiab hloov los ntawm EN 10216-2, thiab kev txiav txim tshiab yuav tsum siv cov qauv European tam sim no thaum khaws cov qib thiab cov khoom siv.