Q1: Tus yam tshuaj lom neeg muaj pes tsawg leeg ntawm Stpg370 yeeb nkab?
Cov tshuaj lom neeg muaj kuab lom ntawm STPG370 cov yeeb nkab steel feem ntau muaj cov pa roj carbon (c), silicon (mn), phosphorus (p), thiab leej faj (s). Raws li JIS G3454, cov pa roj carbon, yog feem ntau tswj hwm hauv qab 0.30% los xyuas kom zoo weldability. Cov ntsiab lus manganese feem ntau yog 0.30% thiab 0.60%, pab txhawb kom txhim kho lub zog thiab tawv. Phosphorus thiab leej faj, raws li cov neeg tsis loj hlob, yuav tsum tau nruj me ntsis txwv (p tsawg dua lossis sib npaug lossis sib npaug los yog sib npaug lossis sib npaug. Ib qho ntxiv, cov hlau no tuaj yeem muaj cov nqi ntawm chromium (CR) thiab tooj (Cu), tab sis cov no tsis yog thawj cov khoom siv ua ntej.
Q2: Cov khoom siv tshuab dab tsi ntawm stpg370 yeeb nkab?
Lub zog tensile ntawm stpg370 yeeb nkab feem ntau yog tshaj 370 MPA, ntsib cov kev xav tau ntawm JIS G3454. Nws cov txiaj ntsig lub zog yog kwv yees li 215 MPa, thiab nws txoj kev elongation (ntawm lub ntsuas cua ntev ntawm 50 hli tsis muaj tsawg dua 25%, qhia meej meej zoo heev thiab muaj peev xwm. Cov yeeb nkab hlau no feem ntau yog feem ntau hauv qab HB 130, ua rau nws haum rau kev ua haujlwm txias thiab vuam. Vim nws lub zog nruab nrab, stpg370 tau siv dav rau qhov qis- kev thauj mus los ntawm cov qauv zoo thiab kev txhawb nqa. Tsis tas li ntawd, nws qhov kev cuam tshuam nyuaj yog qhov zoo nyob rau hauv chav tsev kub, tab sis kev ntsuas ntxiv yuav raug rau hauv qhov qis- qhov chaw ib puag ncig.
Q3: Dab tsi yog qhov ntsuas qhov ntsuas kub tau rau STPG370 yeeb nkab?
Stpg370 yeeb nkab feem ntau yog tsim los siv rau hauv qhov kub ntawm {10 degree, ua rau nws tsim nyog rau cov ntawv thov. Ntawm tsawg kub (piv txwv li, hauv qab {[}} 30}} Qhov kev cuam tshuam kub tsawg {{14} {cov ntaub ntawv resistant. Thaum kub siab (saum toj 350 degree), nws oxidation tiv taus thiab lub zog tsis txaus, thiab cov khoom siv tsis taus. Yog li ntawd, stp370 cov yeeb nkab steel tsis haum rau siv nyob rau hauv boilers lossis high-kub tshuab luam ntawv siab. Rau qhov kub thiab txias ua tau zoo, alloy steel kav dej xws li stpt410 lossis STPA20 tuaj yeem siv.
Q4: Cov txheej txheem tsim khoom rau stpg370 yeeb nkab?
Stpg370 yeeb nkab steel yog feem ntau ua lag luam siv cov yeeb nkab uas siv tau (SMLS) lossis hluav taws xob ua haujlwm. Seamless steel yeeb nkab yog tsim los ntawm kub dov lossis txias kos duab thiab tsim nyog rau siab dua thiab haum rau qis- kev thauj mus los. Thaum lub sij hawm tsim kev tsim khoom, kev tswj hwm kev kho mob kub (xws li normalizing) yuav tsum ua kom zoo dua cov neeg kho tshuab. Tsis tas li ntawd, cov yeeb nkab steel undergoes tsis- kev sim ultrasonic lossis eddy tam sim no kom paub meej txog kev tsis taus sab hauv. Thaum kawg, cov yeeb nkab tas lawm undergoes hydrostatic kuaj kom paub tseeb tias nws cov kabmob muaj peev xwm ua tau raws li cov cai.
Q5: Dab tsi yog qhov sib txawv ntawm STPG370 yeeb nkab thiab lwm cov qhab nia zoo sib xws, xws li Stpg410?
Ob qho tib si Stpg370 thiab STPG410 yog cov kav hlau ua haujlwm raws li JIS G3454, tab sis Stpg410 muaj lub zog ntau dua lossis sib npaug rau 410 mpa). Stpg410 muaj cov ntsiab lus muaj roj carbon ntau dua, xav tau kev tswj hwm kev sib tw thaum muaj kev tiv thaiv kev tawg. STPG370 is more suitable for low-pressure, ambient-temperature environments, while STPG410 can be used in slightly higher-pressure and higher-temperature environments. Tsis tas li ntawd, STPG410 feem ntau kim dua, ua stpg370 ntau tshaj kev lag luam rau cov chaw xav tau tsawg. Ob hom kev nthuav qhia corrosion zoo li corrosion tsis kam, xav tau anti- corrosizing kev kho (xws li galvosizing kho lossis txheej) rau kev siv nyob rau hauv ib puag ncig.
