Qhov sib txawv tseem ceeb ntawm EN10028-P275NH, P275NL1, P275NL2 Siab Vessel Steel

Cov qib EN 10028 no tau siv dav hauv kev tsim cov boilers, cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab cov tshuab ua haujlwm siab ua haujlwm nyob rau hauv qhov kub thiab txias.

P275 NH,P275 NL1thiab P275NL2 yog weldable zoo- cov nplej hlau tsim los rau kev siv cov hlab ntsha siab. Ntawm lawv, P275NH yog qhov tsim nyog rau kev tsim cov hlab ntsha siab siv rau cov pa roj, tshuaj, cov boilers, compressors, thiab kub exchangers.

Cov tsev neeg qib no feem ntau yog npaj rau kev pabcuam nruab nrab mus rau qhov kub thiab txias, muab cov khoom siv txhim khu kev qha thiab zoo weldability.

Lwm qhov kev xaiv qib hauv P275 series suav nrog:

NL1 - Pom zoo rau kev pabcuam ntawm qhov kub thiab txias

NL2 - Tsim nyog rau tshwj xeeb tshaj yog qis- daim ntawv thov kub, muab cov kev cuam tshuam zoo zog

P275NH steel phaj feem ntau muaj los ntawm Tshuag thiab tuaj yeem xa tawm thoob ntiaj teb. Tag nrho cov khoom siv carbon steel phaj raug kuaj raws li cov qauv thoob ntiaj teb nruj, ua kom zoo ib yam, txhim kho cov khoom siv tau zoo, thiab txo cov sij hawm txhuas.

Rau cov ncauj lus kom ntxaws cov yam ntxwv, thov mus saib cov ntaub ntawv hauv qab no.

Table 1: Cov tshuaj muaj pes tsawg leeg ntawm EN 10028 P275NH, P275NL1 & P275NL2

Chemical element muaj pes tsawg leeg yog qhia raws li feem pua ​​​​ntawm huab hwm coj.

Kev Xav Tau Ntxiv:
Cov ntsiab lus sib xyaw ntawm Niobium (Nb), Titanium (Ti), thiab Vanadium (V) yuav tsum tsis pub tshaj 0.05%.

Cov ntaub ntawv qhia txog kev qhia saum toj no yog rau kev taw qhia dav dav nkaus xwb. Rau cov kev qhia tshwj xeeb thiab qhov project- cov kev cai tshwj xeeb, thov sab laj nrog peb pab neeg muag khoom lossis cov kws tshaj lij.

Yog xav paub ntxiv txog P275NH, P275NL1 thiab P275NL2 siab nkoj steels, lossis kom tau txais cov lus sib tw rau kev muab khoom, thov hu rau peb ncaj qha. Peb pab neeg yuav txaus siab los pab koj xaiv cov khoom, muaj, thiab kev npaj xa khoom.

Hu rau tam sim no

Q1: EN 10028-3 P275NL1 steel phaj yog dab tsi?

A:
P275NL1 yog ib qho zoo weldable-grain steel teev nyob rau hauv EN 10028-3, npaj rau cov hlab ntsha siab thiab boilers ua hauj lwm nyob rau hauv qis-kub. Cov khoom siv yog nkag rau hauv qhov normalized (N) thiab yog tsim los muab kev ruaj ntseg zog, toughness, thiab weldability.

Q2: Lub npe "P275NL1" txhais li cas?

A:

P - Hlau rau lub hom phiaj siab

275 - Tsawg tshaj tawm lub zog ntawm 275 MPa (rau cov phaj nyias)

N - Normalized lossis normalized dov xa khoom

L1 - Guaranteed qis-kub qhov cuam tshuam toughness theem

Q3: Dab tsi yog cov khoom tseem ceeb ntawm P275NL1?

A:
Tej yam xav tau kev kho tshuab (nyob ntawm thickness) muaj xws li:

Lub zog tawm los: Ntau dua lossis sib npaug ntawm 275 MPa

Tensile zog: kwv yees li . 390–510 MPa

Elongation: Ntau dua lossis sib npaug li 23-24%

Charpy V-qhov ntsuas qhov cuam tshuam: Tau lees paub ntawm qhov kub thiab txias (feem ntau yog −40 degree, ib tus qauv yuav tsum tau ua)

Qhov tseem ceeb sib txawv ntawm cov phaj tuab thiab yuav tsum tau kuaj xyuas raws li EN 10028-3 thiab daim ntawv pov thawj zeb xeem.

Q4: Dab tsi yog qhov tseem ceeb ntawm cov tshuaj muaj pes tsawg leeg?

A:
P275NL1 tau tswj cov tshuaj muaj pes tsawg leeg los xyuas kom meej weldability thiab qis -kub toughness:

Cov pa roj carbon (C): Cov ntsiab lus carbon tsawg los txhim kho weldability

Manganese (Mn): Txhim kho lub zog thiab toughness

Silicon (Si): Siv los ua deoxidizer

Phosphorus (P) & Sulfur (S): nruj me ntsis txwv kom txo brittleness

Micro- alloying cov ntsiab lus (Nb, V, Ti): Siv rau kev kho cov nplej thiab txhim kho kev ua tau zoo

Q5: Puas yog P275NL1 haum rau qis-kev pabcuam kub?

A:
Yog lawm. P275NL1 yog cais raws li qhov qis- kub zoo steel, nrog rau qhov yuav tsum tau kuaj xyuas ntawm sub- xoom kub. Nws yog feem ntau siv rau hauv cov hlab ntsha siab thiab cov khoom siv raug rau cov huab cua txias lossis kub ua haujlwm qis.

Q6: Qhov txawv ntawm P275NL1 thiab P275NH yog dab tsi?

A:

P275NL1: Optimized rau qis-kub toughness

P275NH: Ua kom zoo rau kev siab siab -kev pabcuam kub

Kev xaiv nyob ntawm qhov tsim kub ntawm cov khoom siv siab.

Q7: P275NL1 muab tau li cas?

A:
Cov hlau yog muab rau hauv qhov normalized (N) mob, ua kom muaj kev nplua -grain microstructure thiab zoo ib yam khoom siv thoob plaws lub phaj thickness.