15CrMoG siab siab steel yeeb nkab kev ruaj ntseg
15CrMoG steel yeeb nkab yog ib hom seamless steel yeeb nkab, thiab nws cov kev ua tau zoo ntau dua li cov yeeb nkab seamless steel zoo tib yam. Vim tias cov yeeb nkab steel no muaj ntau dua Cr, nws qhov kub tsis kam, qhov kub tsis kam thiab corrosion kuj tsis tuaj yeem muab piv nrog rau lwm cov yeeb nkab steel seamless, yog li cov yeeb nkab alloy yog dav siv hauv roj av, tshuaj lom neeg kev lag luam, hluav taws xob, boiler thiab lwm yam lag luam. .
Lub hauv paus ntsiab lus ntawm hydrogen purification los ntawm 15CrMoG steel yeeb nkab yog tias thaum lub hydrogen yuav tsum tau purified yog nkag mus rau hauv ib sab ntawm 15CrMoG steel yeeb nkab ntawm 300-500 ℃, hydrogen yog adsorbed rau ntawm phab ntsa ntawm 15CrMoG steel yeeb nkab. Vim tias tsis muaj ob lub electrons hauv 4D electron txheej ntawm palladium, nws tuaj yeem tsim cov tshuaj tsis ruaj khov nrog hydrogen (cov tshuaj tiv thaiv ntawm palladium thiab hydrogen yog thim rov qab). Nyob rau hauv qhov kev txiav txim ntawm palladium, hydrogen yog ionized rau hauv protons nrog lub vojvoog ntawm 1.5 × 1015m, thaum lub lattice tas li ntawm palladium yog 3.88 × 10-10m (ntawm 20 ℃), nws tuaj yeem dhau los ntawm 15CrMoG alloy steel yeeb nkab. Nyob rau hauv qhov kev txiav txim ntawm palladium, protons ua ke nrog electrons thiab rov tsim hydrogen molecules, uas khiav tawm ntawm sab nraud ntawm 15CrMoG alloy steel yeeb nkab. Nyob rau saum npoo ntawm 15CrMoG alloy steel yeeb nkab, cov roj tsis sib xws tsis tuaj yeem dhau mus, yog li 15CrMoG alloy steel yeeb nkab tuaj yeem siv tau kom tau txais cov dej ntshiab huv.
Txawm hais tias palladium muaj qhov tshwj xeeb permeability rau hydrogen, ntshiab palladium muaj cov khoom siv tsis zoo, yooj yim oxidation ntawm qhov kub thiab txias tsis tshua muaj recrystallization, uas yooj yim rau deform thiab embrittle 15CrMoG steel yeeb nkab. Yog li ntawd, ntshiab palladium tsis tuaj yeem siv ua permeability membrane. Ntxiv qhov tsim nyog ntawm IB thiab VIII cov ntsiab lus rau palladium los ua palladium alloy tuaj yeem txhim kho cov khoom siv ntawm palladium. 11. Seamless steel yeeb nkab rau tsheb ib nrab qag lub tes tsho (gb3088-82) yog cov khoom siv zoo carbon steel thiab alloy structural steel kub dov seamless steel yeeb nkab rau kev tsim tsheb ib nrab qag tes tsho thiab tsav qag vaj tse. Nyob rau hauv palladium alloy, nyiaj nyiaj txog li 20-30%, thiab cov ntsiab lus ntawm lwm yam khoom (xws li kub, thiab lwm yam) yog tsawg dua 5%.
① Ob tus lej thaum pib ntawm qib steel sawv cev rau cov ntsiab lus carbon ntawm cov hlau, qhia tias yog ob peb txhiab ntawm cov ntsiab lus nruab nrab carbon, xws li 40Cr.
②Lub ntsiab alloying ntsiab nyob rau hauv steel, tshwj tsis yog rau ib tug neeg microalloyed ntsiab, feem ntau qhia nyob rau hauv ob peb feem pua. Thaum qhov nruab nrab cov ntsiab lus alloy tsawg dua 1.5%, feem ntau tsuas yog cov cim cim cim hauv qib steel, tab sis cov ntsiab lus tsis raug cim. Txawm li cas los xij, yog tias nws yooj yim kom tsis meej pem nyob rau hauv cov xwm txheej tshwj xeeb, tus lej "1" kuj tuaj yeem raug cim tom qab lub cim cim, xws li qib steel "12CrMoV" thiab "12Cr1MoV". Cov ntsiab lus chromium ntawm yav dhau los yog 0.4-0.6%, thiab qhov tom kawg yog 0.9-1.2%, thiab lwm yam khoom yog tib yam. Thaum cov ntsiab lus nruab nrab ntawm cov ntsiab lus alloy yog ≥ 1.5%, ≥ 2.5%, ≥ 3.5% ... Cov ntsiab lus yuav tsum tau qhia tom qab lub cim cim, uas tuaj yeem qhia tau tias yog 2, 3, 4... thiab lwm yam. Piv txwv li, 18Cr2Ni4WA.
③Vanadium V, titanium Ti, aluminium Al, boron B, tsis tshua muaj ntiaj teb RE thiab lwm yam hlau alloy hauv cov hlau yog cov khoom siv microalloyed. Txawm hais tias cov ntsiab lus tsawg heev, lawv tseem yuav tsum tau cim rau hauv qib steel. Piv txwv li, hauv 20mnvb steel. 0.07-0.12% rau vanadium thiab 0.001-0.005% rau boron.
④ Cov hlau zoo yuav tsum raug cim nrog "a" tom kawg ntawm qib steel kom paub qhov txawv ntawm cov hlau zoo.
⑤Rau alloy structural steel rau lub hom phiaj tshwj xeeb, qib steel yog ua ntej los ntawm (los yog cov lus tom qab) los sawv cev rau lub cim ntawm lub hom phiaj ntawm cov hlau. Piv txwv li, 30CrMnSi steel rau riveting ntsia hlau yog sawv cev li ml30crmnsi.
Alloy yeeb nkab thiab seamless yeeb nkab muaj ob qho tib si kev sib raug zoo thiab sib txawv, thiab tsis tuaj yeem tsis meej pem. Alloy yeeb nkab yog ib hom seamless yeeb nkab. Txawm hais tias nws tsis tuaj yeem sib xyaw, seamless yeeb nkab suav nrog cov yeeb nkab alloy.
Alloy yeeb nkab yog txhais raws li cov yeeb nkab steel raws li cov khoom siv (xws li cov khoom siv). Raws li lub npe qhia, nws yog cov yeeb nkab ua los ntawm alloy; Seamless yeeb nkab yog txhais raws li cov txheej txheem ntawm cov yeeb nkab steel (seamless seam). Dab tsi yog qhov txawv ntawm cov yeeb nkab seamless yog seamless yeeb nkab, nrog rau ncaj seam welded yeeb nkab thiab kauv yeeb nkab.
