Tshuaj muaj pes tsawg leeg

Gr.3: Cov ntsiab lus carbon ≤0.19%, silicon cov ntsiab lus 0.18% -0.37%, manganese cov ntsiab lus 0.31% -0.64%, phosphorus thiab sulfur ntsiab lus ≤0.025%, thiab tseem muaj 3.18% -3.82% nickel.

Gr.6: Cov ntsiab lus carbon ≤0.30%, silicon cov ntsiab lus ≥0.10%, manganese cov ntsiab lus 0.29% -1.06%, phosphorus thiab sulfur ntsiab lus Tag nrho ≤0.025%.

Mechanical zog

Gr.3: tensile lub zog ≥450MPa, yield zog ≥240MPa, elongation ≥30% longitudinally, ≥20% transversely, tsis tshua muaj kev ntsuas kub yog -150 ° F (-100 ° C).

Gr.6: tensile lub zog ≥415MPa, yield zog ≥240MPa, elongation ≥30% longitudinally, ≥16.5% transversely, tsis tshua muaj kev ntsuas kub yog -50 ° F (-45 ° C).

Cov txheej txheem ntau lawm

Smelting: Siv lub tshuab hluav taws xob los yog lub tshuab hluav taws xob thiab lwm yam khoom siv los deoxidize, tshem tawm slag thiab alloy cov hlau molten kom tau Pure molten steel.

Rolling: Txhaj molten hlau rau hauv lub raj dov zeb rau dov, maj mam txo lub raj txoj kab uas hla thiab tau txais cov phab ntsa tuab, thiab tib lub sijhawm, du nto ntawm lub raj steel.

Kev ua haujlwm txias: Los ntawm kev ua haujlwm txias xws li kev kos duab txias lossis txias dov, qhov ua tau zoo thiab qhov zoo ntawm lub raj steel tuaj yeem txhim kho ntxiv.

Kev kho cua sov: Feem ntau, nws raug xa mus rau hauv normalizing lossis normalizing thiab tempering lub xeev kom tshem tawm cov kev ntxhov siab nyob rau hauv lub raj steel thiab txhim kho nws cov kev ua tau zoo.

Daim ntawv thov teb

Petrochemical: Siv los tsim cov kav dej kub tsis tshua muaj siab thiab cov kav dej kub kub hauv cov roj av, tshuaj lom neeg kev lag luam, thiab lwm yam, uas tuaj yeem ua tau raws li cov kev cai siv nyob rau hauv qhov kub thiab txias, xws li cov roj liquefied Natural gas cia tanks, low-temperature transmission pipelines, etc.

Cov pa roj carbon monoxide: Tsim nyog rau cov kav xa hluav taws xob thiab cov roj tso tsheb hlau luam thiab lwm yam khoom siv los xyuas kom muaj kev nyab xeeb ntawm kev ua haujlwm hauv qhov kub thiab txias.

Lwm yam kev lag luam: Nws kuj yog siv rau hauv lub zog, aerospace, thiab shipbuilding, xws li cov ntaub ntawv tseem ceeb rau condensers, boilers thiab lwm yam khoom siv hauv cov khoom siv fais fab, thiab cov khoom siv tseem ceeb rau hydraulic systems, roj thiab lwm yam khoom siv hauv aerospace teb.

Specifications thiab qhov ntev

Cov kev qhia tshwj xeeb thiab qhov ntev muaj ntau yam, xws li sab nraud 21.3-711mm, phab ntsa thickness 2-120mm, thiab lwm yam.
Gr.6 seamless steel yeeb nkab, tshwj xeeb tshaj yog ASTM A333 / A333M GR.6 lossis SA-333 /SA333M GR.6low-temperature seamless steel yeeb nkab, yog ib qho tseem ceeb ntawm cov khoom lag luam, dav siv nyob rau hauv ntau lub sijhawm uas yuav tsum muaj qhov kub thiab txias toughness thiab siab zog. Cov hauv qab no yog cov ncauj lus kom ntxaws txog Gr.6 seamless steel yeeb nkab:

1. Cov qauv siv thiab cov khoom siv

Cov qauv kev coj ua: Gr.6 seamless steel yeeb nkab siv ASTM A333 / A333M lossis ASME SA-333 / SA333M cov qauv, uas tau muab los ntawm American Society for Testing and Materials (ASTM) thiab American Society of Mechanical Engineers (ASME) thiab tshwj xeeb yog siv los qhia cov kev cai rau seamless steel kav dej kub thiab txias.

Khoom siv: Gr.6 seamless steel yeeb nkab yog nickel-free low-temperature steel yeeb nkab, uas siv aluminium-deoxidized fine-grained low-temperature toughness steel, tseem hu ua aluminium-tua steel. Nws cov qauv metallographic yog lub cev-centered cubic ferrite.

2. Tshuaj muaj pes tsawg leeg

Cov tshuaj muaj pes tsawg leeg ntawm Gr.6 seamless steel yeeb nkab feem ntau suav nrog:

Cov pa roj carbon (C): Cov ntsiab lus qis, feem ntau tsis tshaj 0.30%, uas yuav pab txo cov nkig ntawm cov hlau.

Manganese (Mn): Cov ntsiab lus ntawm 0.29% thiab 1.06%, uas tuaj yeem txhim kho lub zog thiab tawv ntawm cov hlau.

Silicon (Si): Cov ntsiab lus nyob nruab nrab ntawm 0.10% thiab 0.37%, uas pab cov txheej txheem deoxidation ntawm cov hlau thiab tuaj yeem txhim kho lub zog ntawm cov hlau mus rau qee yam.

Phosphorus (P) thiab sulfur (S): Raws li cov ntsiab lus impurity, lawv cov ntsiab lus yog nruj me ntsis txwv, feem ntau tsis pub tshaj 0.025%, vim hais tias cov ntsiab lus siab ntawm phosphorus thiab sulfur yuav txo cov toughness thiab weldability ntawm hlau.

Lwm cov ntsiab lus alloying: xws li chromium (Cr), npib tsib xee (Ni), molybdenum (Mo), thiab lwm yam, lawv cov ntsiab lus tseem raug tswj los ntawm qib qis kom ntseeg tau tias qhov ntsuas kub tsis zoo thiab kev ua tau zoo ntawm cov hlau.

3. Mechanical zog

Gr.6 seamless steel yeeb nkab muaj cov cuab yeej zoo heev, feem ntau suav nrog:

Lub zog tensile: Feem ntau ntawm 415 thiab 655 MPa, uas ua kom cov yeeb nkab steel muaj peev xwm tswj tau cov qauv kev ncaj ncees thiab tiv thaiv kev tawg thaum nyob hauv siab.

Lub zog tawm los: Qhov tsawg kawg nkaus tus nqi yog li 240 MPa (nws tseem tuaj yeem ncav cuag ntau dua 200 MPa), yog li nws yuav tsis tsim cov deformation ntau dhau los ntawm qee qhov sab nraud.

Elongation: tsis pub tsawg dua 30%, uas txhais tau hais tias cov yeeb nkab steel muaj qhov zoo ntawm cov yas deformation thiab tuaj yeem tsim cov deformation yam tsis muaj kev tawg thaum ncab los ntawm sab nraud quab yuam. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau kev siv nyob rau hauv qhov kub thiab txias ib puag ncig, vim tias qhov kub thiab txias yuav ua rau cov khoom nkig, thiab cov yas zoo tuaj yeem txo qhov kev pheej hmoo ntawm xws li embrittlement.

Impact toughness: Ntawm qhov ntsuas kub tsawg (xws li -45 ° C), lub zog cuam tshuam yuav tsum ua tau raws li qee qhov kev xav tau los ntawm Charpy cuam tshuam kev kuaj xyuas kom ntseeg tau tias cov yeeb nkab steel yuav tsis tawg hauv qhov kub tsis tshua muaj kev cuam tshuam.