Cov kav dej kub tsis tshua muaj hluav taws xob yog cov qauv nruab nrab carbon steel uas muaj kev ua haujlwm zoo thermal thiab txias, zoo txhua yam khoom, tus nqi qis thiab qhov chaw dav, yog li lawv tau siv dav. Nws qhov tsis muaj zog loj tshaj plaws yog nws cov hardenability tsawg, thiab nws tsis haum rau workpieces nrog loj hla ntu qhov ntau thiab tsawg thiab siab xav tau.
Seamless steel yeeb nkab rau cryogenic pipelines
Spot specifications: 8-1240 × 1-200mm<1/8"-48"×SCH5S-SCH160, STD, XS, XXS>
Khoom siv:, 10MnDG, 09DG, 09Mn2VDG, 06Ni3MoDG,
ASTM A333-Qib 1, Qib 3, Qib 4, Qib 6, Qib 7, Qib 8, Qib 9,
Qib 10, Qib 11
Daim ntawv thov khoom: Tsim nyog rau -45 degree --195 degree low-temperature pressure vessel pipes thiab seamless steel kav rau kub kub exchanger kav
Cov txheej txheem ntau lawm: kos duab txias thiab kub dov
Qhov hnyav ntawm cov mis: (sab nraud txoj kab uas hla-phab ntsa thickness) * phab ntsa thickness * 0.02466/1000= meter/ton
Lub hardness ntawm qis-kub steel yeeb nkab quenched thiab tempered qhov chaw tom qab quenching yuav tsum ncav cuag HRC56 ~ 59. Qhov ua tau ntawm cov ntu loj dua yog qis dua, tab sis nws tsis tuaj yeem qis dua HRC48. Txwv tsis pub, nws txhais tau hais tias lub workpiece tsis tau quenched kiag li, thiab sorbite los yog ferrite tej zaum yuav tshwm sim nyob rau hauv cov qauv. Cov qauv tseem nyob hauv matrix tom qab tempering thiab tsis tuaj yeem ua tiav lub hom phiaj ntawm tempering.
Rau kev kub kub kub tom qab quenching ntawm cov kav dej kub qis, qhov cua sov feem ntau yog 560 ~ 600 degree, thiab qhov yuav tsum tau ua kom tawv tawv yog HRC22 ~ 34. Vim tias lub hom phiaj ntawm tempering yog kom tau txais cov khoom siv kho kom zoo, lub hardness ntau yog qhov dav. Txawm li cas los xij, yog tias daim duab muaj qhov xav tau hardness, tempering kub yuav tsum tau hloov kho raws li qhov yuav tsum tau kos duab kom ntseeg tau qhov hardness. Piv txwv li, ib co ncej-hom low-temperature steel kav yuav tsum muaj zog thiab siab hardness; hos qee lub zog thiab ncej nrog cov keyways yuav tsum tau milled thiab ntxig tom qab tempering, yog li cov hardness yuav tsum tau qis dua. Hais txog tempering thiab tuav lub sij hawm, nws nyob ntawm qhov yuav tsum tau hardness thiab qhov luaj li cas ntawm workpiece. Peb ntseeg hais tias lub hardness tom qab tempering nyob ntawm lub tempering kub thiab muaj me ntsis ua rau lub sij hawm tempering, tab sis nws yuav tsum tau tempered. Feem ntau, tempering thiab tuav lub sij hawm ntawm lub workpiece yog ib txwm ntau tshaj li ib teev.
