16Mn zoo seamless steel yeeb nkab chaw tsim tshuaj paus
(1) Cov qib zoo carbon steel qauv muaj xws li 20g, 20mng thiab 25mng.
(2) Alloy structural steel qib: 15mog, 20mog, 12crmog, 15CrMoG, 12CR2MOG, 12crmovg, 12Cr3MoVSiTiB, thiab lwm yam.
(3)Ntxiv nrog rau kev ua kom muaj cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv kho tshuab, 1Cr18Ni9 thiab 1cr18ni11nb boiler raj feem ntau siv hauv cov hlau tsis xeb hluav taws xob yuav tsum raug kuaj hydrostatic, flaring thiab flattening xeem ib los ntawm ib qho. Cov yeeb nkab steel yuav tsum tau muab xa mus rau hauv qhov chaw kho cua sov.
(1)Gb3087-2008 seamless steel raj rau qis thiab nruab nrab siab boilers. Tensile test yuav tsum ua raws li GB / t228-87, hydrostatic test nrog GB / t241-90, flattening test nrog GB / t246-97, flaring test nrog GB / t242-97 thiab txias bending test nrog gb244-97.
(2)GB5310-2008 seamless steel raj rau kev kub siab boilers. Tensile test, hydraulic test thiab flattening test yog tib yam li cov teev hauv gb3087-82; Impact test raws li gb229-94, flaring test raws li GB / t242-97 thiab grain loj xeem raws li Yb / t5148-93; Kev tshuaj xyuas microstructure yuav tsum ua raws li gb13298-91, decarburized txheej tshuaj xyuas yuav tsum ua raws li gb224-87, thiab kev tshuaj xyuas ultrasonic yuav tsum ua raws li GB / t5777-96.
(3) Kev tshuaj xyuas kev ua haujlwm ntawm lub cev thiab kev ntsuas ntawm cov raj xa dej boiler yuav tsum tau ua raws li cov qauv tsim nyog tau teev tseg hauv daim ntawv cog lus.
Qhov siab tshaj plaws quab yuam (FB) yug los ntawm tus qauv thaum lub sij hawm tensile tawg yog qhov kev ntxhov siab tau los ntawm qhov chaw hla ntu ntu (li) ntawm cov qauv ((σ), hu ua tensile zog (σ b), hauv N / mm2 (MPA) . Nws sawv cev rau lub peev xwm siab tshaj plaws ntawm cov ntaub ntawv hlau los tiv thaiv kev ua tsis tiav hauv qhov nro. Cov mis laij lej yog:
Qhov twg: FB - qhov siab tshaj plaws quab yuam los ntawm tus qauv thaum nws tawg, n (Newton); Yog li -- thawj qhov chaw hla ntu ntawm cov qauv, mm2.
Rau cov khoom siv hlau nrog cov tshwm sim tawm los, qhov kev ntxhov siab thaum cov qauv tuaj yeem txuas ntxiv mus ntxiv yam tsis tau nce (ua kom tsis tu ncua) qhov kev ntxhov siab thaum lub sij hawm tensile txheej txheem hu ua qhov taw tes tawm. Yog tias qhov kev ntxhov siab txo qis, cov ntsiab lus sab saud thiab qis dua yuav tsum tau paub qhov txawv. Chav tsev ntawm qhov taw tes tawm yog n / mm2 (MPA).
Upper yield point (σ Su):qhov siab tshaj plaws kev ntxhov siab ua ntej qhov kev ntxhov siab ntawm cov qauv txo qis rau thawj zaug; Qis yield point (σ SL): qhov tsawg kawg nkaus kev nyuaj siab nyob rau hauv lub yield theem thaum pib instantaneous nyhuv yog tsis xam.
Cov qauv kev suav ntawm yield point yog:
Qhov twg: FS - yield stress (constant) ntawm tus qauv thaum lub sij hawm nro, n (Newton) yog li - thawj cross-sectional cheeb tsam ntawm tus qauv, mm2.
