Yuav tsum-Nyeem Phau Ntawv Qhia Txog Kev Yuav Khoom: Tus Qauv Txuj Ci Thiab Cov Ntsiab Lus Zoo Ntawm A515Gr70 Steel Phaj

A515 Gr70yog cov pa roj carbon steel phaj rau nruab nrab -cov hlab ntsha kub siab txhais hauv AsmeskasASME cov qauv (ASME SA515 / SA515M)thiabASTM tus qauv (ASTM A515 / A515M), belongs rau austenitic coarse-grained steel.

Lub ntsiab lus ntawm nws qib yog raws li nram no:

A515: Sawv cev ntawm cov pa roj carbon steel phaj rau siab -kub siab cov hlab ntsha;

Gr70: Sawv rau "Qib 70", qhia qhov tsawg kawg nkaus tensile lub zog ntawm 70 ksi (kwv yees li 485 MPa).

Nrog cov txiaj ntsig zoo ntawm lub zog siab, siab kub tsis kam, thiab zoo heev weldability, cov khoom siv no yog siv dav hauv petrochemical, tsim hluav taws xob, marine, pipeline thiab lwm yam kev lag luam. Nws yog ib qho khoom siv zoo tshaj plaws rau kev tsim khoom nruab nrab- kub welded boilers, siab hlab ntsha thiab tshav kub exchangers.

• Chemical Composition Design

A515Gr70 sib npaug lub zog thiab toughness los ntawm qis carbon sib npaug thiab microalloying. Nws cov khoom tseem ceeb (Wt%) yog raws li nram no:

• Carbon (C): ≤0.31% (for plate thickness ≤25mm), which can be relaxed to ≤0.35% (>100mm) nrog nce phaj thickness los tswj qhov kev pheej hmoo ntawm vuam tawg;
• Silicon (Si): 0.15-0.40%, txhim kho deoxidation nyhuv thiab oxidation kuj;
• Manganese (Mn): Tsawg dua lossis sib npaug li 1.20%, ntxiv dag zog rau ferrite thiab nce hardenability;
• Phosphorus (P) / Sulfur (S): Tsawg dua lossis sib npaug li 0.035%, txo qhov txias brittleness thiab kub brittleness tendencies;
• Alloying cov ntsiab lus: Kev xaiv ntxiv ntawm chromium (Cr) Tsawg dua lossis sib npaug li 0.25%, npib tsib xee (Ni) Tsawg dua lossis sib npaug li 0.25%, molybdenum (Mo) Tsawg dua lossis sib npaug li 0.08% txhawm rau txhim kho corrosion kuj thiab siab - qhov kub thiab txias.

• Cov yam ntxwv txheej txheem

Normalizing kho (TMCP): Normalizing is mandatory for thickness >50mm los kho cov nplej thiab ua kom zoo dua microstructure, ua kom ruaj khov siab - kub ua haujlwm;

Kev xa khoom: Tswj dov xa khoom raws li tus qauv rau tuab hauv qab 40mm, thiab normalizing tus me nyuam raws li tus qauv rau thickness saum 40mm. Tempering, quenching thiab lwm yam kev kho cua sov kuj tuaj yeem raug teev raws li tus neeg yuav khoom xav tau;

Flaw detection:Tau ua raws liASME SA20 / SA20M tus qauv, nrog 100% ultrasonic flaw nrhiav kom paub meej sab hauv.

Siab zog thiab lub teeb yuag: Tensile lub zog yog ntau tshaj 40% siab dua li ntawm cov pa roj carbon zoo tib yam, uas tuaj yeem txo cov khoom siv hlau siv thiab txo nqi tsheb thauj mus los thiab kev teeb tsa;

Zoo heev kub tsis kam: Ua haujlwm ruaj khov ntawm qhov kub siab ntawm 300-}350 degree, haum rau cov khoom siv xws li boiler nruas thiab cov cua kub siab;

Zoo weldability: Txhawb ntau txoj hauv kev suav nrog kev tiv thaiv hlau arc vuam, submerged arc vuam, thiab roj hlau arc vuam, nrog qis ua ntej - vuam preheating yuav tsum tau (80-120℃);

Corrosion kuj: Muaj ib qho kev kam rau me me hydrogen sulfide (H₂S) ib puag ncig, haum rau petrochemical pipelines;

Kev lag luam: Nta tus nqi nruab nrab ntawm cov qis- alloy steels, ua kev siv nyiaj txiag rau siab dua - lub zog alloy steels.

Kev lag luam Petrochemical

Reaction hlab ntsha:Hydrofining reactors(kev ua haujlwm kub: 300-380 degree, siab: 4-8MPa);

Thaum tshav kub kub exchanger khoom:Plhaub ntawm plhaub-thiab- raj kub exchangers(kev ua haujlwm kub: 200-350 degree, siab: 3-7MPa);

Cov khoom sib cais:Regenerators ntawm catalytic cracking units, resistant rau me me corrosive media.

Kev lag luam tsim hluav taws xob

Cov khoom siv boiler:Boiler drums(nrog rau qhov kub thiab txias ntawm 300-}350℃thiab high-pressure chav load ntawm 9-12MPa);

Auxiliary systems:Siab - cov cua kub siab(kev khiav hauj lwm kub: 250-300 degree, siab: 4-6MPa) thiab deaerator dej tso tsheb hlau luam.

Marine thiab Pipeline Engineering

Hull cov qauv: cov hlab ntsha siab thiab cov roj liquefied tso tsheb hlau luam, ua kom haum rau thaj chaw hauv hiav txwv;

Pipeline systems: Petroleum pipelines, steam pipelines, thiab air pipelines, kom ntseeg tau ntev -lub sij hawm nruj.

Lwm yam teb

Nuclear power auxiliary systems: Tsis yog- cov khoom siv hauv cov kob nuclear (xws li siab- cov cua sov siab), txo cov nqi thaum ua tau raws li qhov yuav tsum tau ua;

Cov cuab yeej siv hydraulic: Siab-cov khoom siv bearing bearing dynamic loads.

A515Gr70 steel phaj txhawb ntau yam kev pabcuam ua kom tau raws li tus kheej xav tau:

• Txiav: nplaim txiav, plasma txiav, laser txiav, txhawb kev ua haujlwm nyuaj;
• Tsau -length leveling: Thickness range 8-650mm, ntev thiab dav tuaj yeem kho tau;
• Kev kho deg: Sandblasting, pleev xim, galvanizing, txhim kho corrosion kuj;
• Kev kuaj pom qhov tsis haum: Ua raws qib 1, Qib 2, thiab Qib 3 cov qauv kuaj pom qhov tsis zoo los xyuas kom meej qhov zoo;
• Kev kho cua sov: Muab normalizing, tempering, quenching thiab lwm yam txheej txheem raws li xav tau.

Kev kho dua tshiab:Refining nplej los ntawm normalizing txheej txheem los hloov ib txwm quenching thiab tempering kev kho mob (quenching + tempering), txo zog noj thiab nqi;

Environmental zoo:Tsawg carbon sib npaug tsim txo cov welding fumes, thiab siab recycling tus nqi raws li qhov yuav tsum tau ntawm ntsuab manufacturing;

Kev txhawb nqa Standardization:Raws li qib tseem ceeb ntawm ASME / ASTM cov qauv, nws txhawb txoj kev loj hlob ntawm kev lag luam thoob ntiaj teb siab hlab ntsha;

Daim ntawv thov expansion: Nrog rau kev loj hlob ntawm lub ntiaj teb no lub zog xav tau, daim ntawv thov ntawm A515Gr70 nyob rau hauv supercritical boilers, nuclear fais fab auxiliary systems thiab lwm yam teb yuav txuas ntxiv mus.

Xaus

A515Gr70 steel phaj tau dhau los ua cov khoom tseem ceeb rau nruab nrab - kub siab siab nkoj tsim vim nws lub zog siab, siab kub tsis kam, zoo weldability thiab corrosion kuj. Los ntawm petrochemical reactors rau fais fab nroj tsuag boiler nruas, los ntawm marine liquefied roj tso tsheb hlau luam mus rau nuclear fais fab auxiliary cov cuab yeej, nws cov kev ua tau zoo stability thiab kev lag luam muab ib tug ruaj guarantee rau lub ntiaj teb no muaj kev ruaj ntseg thiab efficiency. Nrog rau kev nce qib ntawm "dual carbon" lub hom phiaj, A515 Gr70 alloy steel phaj txuas ntxiv tsav lub nkoj siab kev lag luam mus rau kev ua haujlwm siab thiab kev loj hlob ntsuab los ntawm cov txheej txheem optimization thiab cov khoom tsim.

Thov Ib Qhov Quote

Yog tias koj xav paub ntxiv txog GNEE cov khoom, koj tuaj yeem xa email raualloy@gneesteelgroup.com.Peb zoo siab tshaj los pab koj.