Cov tshuaj lom neeg muaj pes tsawg leeg

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

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

Cov khoom siv kho tshuab

Gr.3: lub zog tensile ≥450MPa, lub zog tawm los ≥240MPa, elongation ≥30% longitudinally, ≥20% transversely, qhov kub thiab txias qis yog -150 ° F (-100 ° C).

Gr.6: lub zog tensile ≥415MPa, lub zog tawm los ≥240MPa, elongation ≥30% longitudinally, ≥16.5% transversely, qhov kub thiab txias qis yog -50 ° F (-45 ° C).

Cov txheej txheem ntau lawm

Kev Smelting: Siv lub tshuab hluav taws xob lossis lub converter thiab lwm yam khoom siv los deoxidize, tshem tawm slag thiab alloy cov hlau molten kom tau txais cov hlau molten ntshiab.

Dov: Txhaj cov hlau molten rau hauv lub raj dov zeb rau dov, maj mam txo qhov txoj kab uas hla ntawm lub raj thiab tau txais qhov tuab ntawm phab ntsa uas xav tau, thiab tib lub sijhawm, ua kom du qhov chaw ntawm lub raj hlau.

Kev ua txias: Los ntawm kev ua txias xws li kev kos duab txias lossis dov txias, qhov tseeb thiab qhov zoo ntawm cov yeeb nkab hlau 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 seem hauv lub raj hlau thiab txhim kho nws cov kev ua tau zoo.

Daim ntawv thov teb

Petrochemical: Siv los tsim cov kav dej kub qis thiab cov kav dej kub qis hauv cov teb roj av, kev lag luam tshuaj lom neeg, thiab lwm yam, uas tuaj yeem ua tau raws li qhov yuav tsum tau siv hauv qhov chaw kub qis, xws li cov roj av liquefied natural gas, cov kav dej kub qis, thiab lwm yam.

Cov roj av: Haum rau cov kav dej xa roj av thiab cov tso tsheb roj thiab lwm yam khoom siv kom ntseeg tau tias muaj kev nyab xeeb hauv qhov chaw kub qis.

Lwm cov teb: Nws kuj siv rau hauv lub zog, aerospace, thiab kev tsim nkoj, xws li cov ntaub ntawv tseem ceeb rau cov condenser, boilers thiab lwm yam khoom siv hauv cov khoom siv fais fab, thiab cov ntaub ntawv tseem ceeb rau cov tshuab hydraulic, cov roj thiab lwm yam khoom siv hauv thaj chaw aerospace.

Cov Lus Qhia thiab qhov ntev

Cov lus qhia dav dav thiab qhov ntev muaj ntau yam, xws li sab nraud txoj kab uas hla 21.3-711mm, phab ntsa tuab 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.6Cov yeeb nkab hlau tsis muaj qhov kub thiab txias, yog ib yam khoom siv tseem ceeb hauv kev lag luam, siv dav hauv ntau lub sijhawm uas xav tau kev tawv tsis kub thiab muaj zog. Cov hauv qab no yog cov lus qhia ntxaws txog Gr.6 seamless steel yeeb nkab:

1. Cov qauv siv thiab cov ntaub ntawv

Cov qauv siv: 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 tau siv tshwj xeeb los qhia cov kev cai rau cov yeeb nkab hlau seamless thiab cov yeeb nkab hlau welded rau qhov kub qis.

Khoom siv: Gr.6 seamless steel yeeb nkab yog ib lub yeeb nkab hlau uas tsis muaj nickel, uas siv cov hlau tawv uas tsis muaj txhuas-deoxidized, tseem hu ua hlau uas raug tua los ntawm txhuas. Nws cov qauv metallographic yog lub cev-centered cubic ferrite.

2. Cov tshuaj lom neeg muaj pes tsawg leeg

Cov tshuaj lom neeg ntawm Gr.6 seamless steel yeeb nkab feem ntau suav nrog:

Carbon (C): Cov ntsiab lus tsawg, feem ntau tsis pub tshaj 0.30%, uas pab txo qhov brittleness ntawm hlau.

Manganese (Mn): Cov ntsiab lus yog nruab nrab ntawm 0.29% thiab 1.06%, uas tuaj yeem txhim kho lub zog thiab toughness ntawm hlau.

Silicon (Si): Cov ntsiab lus yog 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 rau qee qhov.

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

Lwm cov khoom sib xyaw: xws li chromium (Cr), nickel (Ni), molybdenum (Mo), thiab lwm yam, lawv cov ntsiab lus kuj raug tswj hwm ntawm qib qis kom ntseeg tau tias qhov kub qis thiab kev ua tau zoo ntawm cov hlau.

3. Cov khoom siv kho tshuab

Gr.6 seamless steel yeeb nkab muaj cov khoom siv kho tshuab zoo heev, feem ntau suav nrog:

Lub zog tensile: Feem ntau ntawm 415 thiab 655 MPa, uas ua kom cov yeeb nkab hlau tuaj yeem tswj tau qhov kev ua haujlwm zoo thiab tiv thaiv kev tawg thaum muaj kev nyuaj siab.

Lub zog tawm los: Tus nqi tsawg kawg nkaus yog li 240 MPa (nws kuj tseem tuaj yeem ncav cuag ntau dua 200 MPa), yog li nws yuav tsis tsim kev hloov pauv ntau dhau nyob rau hauv qee lub zog sab nraud.

Kev ncab: tsis pub tsawg dua 30%, uas txhais tau tias cov yeeb nkab hlau muaj peev xwm ua kom cov yas hloov pauv zoo thiab tuaj yeem tsim qee qhov kev hloov pauv yam tsis tawg thaum ncab los ntawm lub zog sab nraud. Qhov no tseem ceeb heev rau kev siv hauv qhov chaw kub qis, vim tias qhov kub qis yuav ua rau cov khoom tawg, thiab cov yas zoo tuaj yeem txo qhov kev pheej hmoo ntawm kev tawg.

Kev cuam tshuam tawv: Thaum qhov kub qis qis (xws li -45 ° C), lub zog cuam tshuam yuav tsum ua tau raws li qee qhov kev cai lej los ntawm kev kuaj xyuas qhov cuam tshuam Charpy kom ntseeg tau tias cov yeeb nkab hlau yuav tsis tawg thaum muaj kev cuam tshuam kub qis.