GB/T 5310-2017 yog cov lus qhia txog kev siv cov kav hlau tsis muaj seamless rau cov boilers siab hauv Suav teb tus qauv. Nws siv tau rau kev tsim cov boilers, cov kav dej, thiab lwm yam khoom siv ua haujlwm ntawm qhov siab thiab siab dua.
Tus qauv no npog ntau yam hlau sib xyaw, uas 12CrMoG thiab 15CrMoG yog ob hom hlau sib xyaw uas siv ntau nrog kev siv dav thiab muaj txiaj ntsig zoo.
12CrMoGyog cov hlau chromium-molybdenum alloy uas muaj kev tiv taus kub thiab oxidation zoo heev. Nws yog qhov tsim nyog rau boiler superheaters, reheaters, steam piping, thiab lwm yam khoom ua haujlwm ntawm qhov kub qis dua 540 ° C. Nws cov txiaj ntsig suav nrog lub zog nkag siab thiab lub zog ua haujlwm ntev, thiab lub peev xwm los tswj cov khoom siv kho tshuab ruaj khov hauv qab qhov kub thiab txias thiab siab. Nws kuj muaj kev sib txuas zoo thiab kev ua tiav, ua rau nws yooj yim rau kev tsim khoom thiab teeb tsa.

15CrMoGyog lwm cov hlau chromium-molybdenum alloy uas muaj kev ua tau zoo dua li 12CrMoG. Nws yog qhov tsim nyog rau cov khoom siv boiler siab ua haujlwm ntawm qhov kub qis dua 550 ° C. Cov khoom siv no muaj lub zog kub siab dua thiab tiv taus oxidation, ua rau nws tsim nyog rau kev tsim cov khoom tseem ceeb xws li boiler headers thiab cov kav dej loj. 15CrMoG kuj muaj kev tiv thaiv zoo rau hydrogen corrosion, zoo tiv thaiv cov khoom puas tsuaj hauv qhov kub thiab txias, siab hydrogen ib puag ncig thiab ntev lub neej ntawm cov khoom siv.

Ob hom hlau sib xyaw no siv dav hauv cov khoom siv kub thiab siab hauv kev lag luam fais fab, petrochemical, thiab tshuaj lom neeg. Lawv cov txiaj ntsig feem ntau pom tseeb hauv cov hauv qab no: Ua ntej, lawv muaj cov khoom siv kho tshuab kub thiab siab zoo heev, ua rau lawv tiv taus kev ua haujlwm kub thiab siab ntev; qhov thib ob, lawv muaj kev ruaj khov zoo heev, ua rau lawv tsis yooj yim rau kev puas tsuaj ntawm cov qauv thaum lub sijhawm ua haujlwm ntev; qhov thib peb, lawv muaj kev sib txuas zoo heev thiab ua tau zoo, ua rau kev tsim khoom thiab kev saib xyuas yooj yim dua; thiab thaum kawg, lawv siv tau zoo heev txhim kho kev nyab xeeb thiab kev ntseeg siab ntawm cov khoom siv, txo lub sijhawm tsis ua haujlwm thiab kev saib xyuas, thiab txo cov nqi ua haujlwm.

Lwm cov hlau alloy ua tau zoo kuj muaj los ua kom tau raws li qhov xav tau ntawm ntau yam kub, siab, thiab ib puag ncig corrosive.

20G(Cov Hlau Carbon)
Txawm hais tias 20G tsis yog hlau alloy, nws yog cov khoom siv tseem ceeb uas teev nyob rau hauv GB / T 5310-2017 ua cov hlau carbon zoo, feem ntau siv rau hauv cov khoom siv boiler kub qis xws li economizers thiab superheaters kub qis. Nws cov txiaj ntsig suav nrog tus nqi qis thiab kev ua haujlwm zoo heev thiab vuam. Nws yog qhov tsim nyog rau cov kav dej boiler nruab nrab thiab qis siab nrog qhov kub ua haujlwm tsis tshaj 450 ° C.
12Cr1MoVG
12Cr1MoVG yog cov hlau chromium-molybdenum-vanadium alloy uas muaj zog kub siab thiab tiv taus oxidation piv rau 12CrMoG thiab 15CrMoG. Kev ntxiv vanadium ua rau cov khoom siv lub zog nkag thiab lub zog ntev dua, ua rau nws tswj tau kev ua haujlwm ruaj khov hauv cov chaw kub siab ntev. 12Cr1MoVG yog qhov tsim nyog rau cov boiler superheaters siab, reheaters, thiab cov kav dej loj nrog qhov kub ua haujlwm qis dua 570 ° C.
25MnG(Manganese Low Alloy Steel)
25MnG yog cov hlau uas tsis muaj hlau ntau nrog cov manganese ntau, muab lub zog thiab kev tawv zoo dua piv rau 20G. Nws muaj lub zog ntau dua thiab lub zog tensile thaum tswj hwm qhov weldability zoo. 25MnG yog qhov tsim nyog rau cov khoom siv boiler nrog qhov kub ua haujlwm siab dua me ntsis, xws li cov raj superheater thiab cov kav dej hauv cov boilers nruab nrab. Nws qhov kub ua haujlwm feem ntau tsis tshaj 480 ° C. Rau cov khoom siv boiler nrog qhov kub qis dua, 20G carbon hlau yog qhov nyiam vim nws qhov kev ua tau zoo hauv kev lag luam. Thaum qhov kub mus txog 450 ° C, 25MnG yog ib qho kev xaiv. Rau qhov kub ntawm 450-500 ° C, 15MoG raug pom zoo. Rau qhov kub ntawm 500-530 ° C, 20MoG yog qhov kev xaiv zoo dua. Cov qib tsis yog hlau thiab cov hlau tsis muaj hlau no, ua ke nrog cov hlau siab, tuaj yeem ua kom zoo dua cov nqi tsim khoom boiler thaum tswj hwm kev ua tau zoo.