Tsis quav ntsej qhov "Los ntawm-Thickness" Property
Qhov no yog ib qho uas tsis pom zoo tshaj plaws - tseem tsis tau muaj kev phom sij heev - kev ua yuam kev hauv cov txheej txheem steel hnyav. Ntau tus neeg yuav khoom txawv teb chaws xav tias thaum qib steel yog qhov tseeb, cov khoom tsim nyog rau fabrication.
Tab sis rau cov qauv kev lag luam hnyav siv cov hlau tuab, qhov kev xav ntawd tuaj yeem dhau los ua kev pheej hmoo loj engineering. Standard structural steel daim hlau tej zaum yuav tsis txaus, tshwj xeeb tshaj yog nyob rau hauv tej yaam num uas muaj xws li:
- Heavy industrial nroj tsuag
- Chaw nres tsheb fais fab
- Petrochemical chaw
- Mining lug
- Loj -span steel tsev
- Offshore qauv
- Siab -load box kem
Cov teeb meem zais hauv cov hlau tuab tuab
Rau cov khoom siv hnyav-tshwj xeeb yog cov phaj tuab dua 20mm, 40mm, lossis txawm tias 100mm- cov khoom sab hauv ntawm cov hlau ua qhov tseem ceeb heev.
Cov neeg yuav khoom feem ntau tsuas yog tsom rau lub zog tawm los, lub zog tensile, thiab qhov zoo ntawm qhov chaw. Tab sis lawv tsis quav ntsej txog cov khoom tseem ceeb:los ntawm -thickness kev ua tau zoo, kuj hu uaZ-cov khoom taw qhia. Qhov no txiav txim siab seb cov hlau coj li cas hauv kev ntxhov siab los ntawm lub thickness ntawm lub phaj thaum vuam thiab thauj khoom.
Cov neeg yuav khoom feem ntau tsuas yog tsom rau lub zog tawm los, lub zog tensile, thiab qhov zoo ntawm qhov chaw.(Ceeb Toom: Qhia qhov tseeb qhov tseeb ntawm cov txiaj ntsig zoo yog thawj kauj ruam tseem ceeb. Saib peb cov txheej txheem kev ua tiav ntawm[Vim li cas tsis meej pem Q235 thiab Q355 cov qauv hlau yog ib qho cuab yeej siv khoom kim heev].)Tab sis lawv tsis quav ntsej txog cov cuab yeej tseem ceeb rau cov qauv hnyav:los ntawm -thickness kev ua tau zoo, kuj hu uaZ-cov khoom taw qhia.
Lamellar Tearing yog dab tsi?
Lamellar tearing yog ib qho kev tsis sib haum xeeb uas tshwm sim hauv daim hlau tuab. Nws feem ntau tshwm sim thaum hnyav vuam shrinkage kev nyuaj siab tshwm sim, cov hlau tsis zoo los ntawm - thickness ductility, thiab tsis yog - hlau inclusions nyob rau hauv lub phaj.
Cov kab nrib pleb tsim nyob rau hauv thiab propagates parallel mus rau lub phaj nto. Qhov no tshwj xeeb tshaj yog nyob rau hauv:
T- sib
Cov pob qij txha
Thick welded kem kem
Heavy restraint vuam chaw
Qhov txaus ntshai yog tias lamellar tearing yuav tsis pom tam sim ntawd los ntawm sab nraud. Tab sis sab hauv, cov qauv yuav twb raug cuam tshuam.
Vim li cas Heavy Industrial Projects muaj siab heev -Risk
Nyob rau hauv loj industrial steel lug, welded pob qij txha feem ntau nqa loj loads. Piv txwv xws li crane-txhawb cov kab, cov cuab yeej siv hnyav, cov qauv steel zeb, lub zog cog thav duab, thiab cov khoom siv sab nrauv.
Cov phiaj xwm no feem ntau siv cov phaj tuab, ntau- txheej vuam, cov khoom siv hluav taws xob siab, thiab sib sib zog nqus welds. Yog tias tsis tsim nyog los ntawm -thickness zog, vuam kev ntxhov siab tuaj yeem tshaj cov hlau sab hauv lub peev xwm. Qhov tshwm sim tuaj yeem ua rau sab hauv tawg, vuam tsis ua haujlwm, kev ua haujlwm tsis muaj zog, thiab txo qis qaug zog lub neej. Hauv qhov xwm txheej hnyav, qhov tsis ua haujlwm tseem ceeb yuav tshwm sim tom qab qhov project nkag mus rau kev ua haujlwm.
Cov phiaj xwm no feem ntau siv cov phaj tuab, ntau- txheej vuam, cov khoom siv hluav taws xob siab, thiab sib sib zog nqus welds.(Rau ib daim ntawv qhia ua tiav ntawm kev xaiv cov vuam tsis zoo rau cov kab hnyav, nyeem peb qhov kev sib piv engineering ntawm[CJP vs. PJP vuam hauv cov qauv hlau].)Yog tsis tsim nyog los ntawm -thickness zog, welding kev nyuaj siab tuaj yeem tshaj cov hlau sab hauv lub peev xwm.
Vim li cas Standard Steel Phaj yuav tsis haum
Ordinary structural daim hlau yog feem ntau sim rau tensile lub zog, yield zog, thiab elongation. Tab sis lawv tsis yog ib txwm sim rautxo qhov chaw hauv Z-kev taw qhia, uas ntsuas cov hlau ductility los ntawm nws cov thickness.
Hauv cov phaj tuab, cov khoom siv microscopic uas tsis yog{0}}cov hlau sib xyaw ua cov txheej thaum dov. Cov txheej sab hauv no ua rau cov hlau tsis muaj zog los ntawm - kev ntxhov siab tuab. Tias yog vim li cas hnyav welded lug feem ntau xav tau Z15 steel, Z25 steel, los yog Z35 steel.
Z15, Z25, thiab Z35 txhais li cas?
Cov kev faib tawm no sawv cev rau cov hlau los ntawm -thickness txo ntawm thaj chaw ua haujlwm. Z siab dua - tus nqi txhais tau tias zoo dua ductility, zoo dua rau lamellar tearing, thiab siab dua vuam kev ntseeg tau.
| Qib | Tsawg kawg ntawm cheeb tsam | Daim Ntawv Thov Kev Nyab Xeeb Qib |
| Z15 |
Ntau dua lossis sib npaug li 15% |
Basic los ntawm -thickness kuj rau nruab nrab cov qauv loads. |
| Z25 |
Ntau dua lossis sib npaug li 25% |
Kev ntseeg siab rau cov khoom hnyav hnyav thiab cov qauv tuab daim hlau. |
| Z35 |
Ntau dua lossis sib npaug li 35% |
Muab kev tiv thaiv zoo tshaj plaws rau cov qauv hnyav hnyav thiab hnyav hnyav hnyav. |
Common Buyer yuam kev
Ntau pawg neeg yuav khoom ua yuam kev ntawm kev xaj tsuas yog "Q355B steel phaj" yam tsis tau qhia Z- cov lus qhia yuav tsum tau ua.
Yog li ntawd, cov neeg muag khoom tuaj yeem muab cov phiaj xwm zoo tib yam, cov neeg tsim khoom ntsib cov kab nrib pleb tawg, thiab kev kho qhov chaw ua tus nqi kim heev. Qee zaum, qhov teeb meem tsuas yog pom tom qab kev teeb tsa. Thaum lub sijhawm ntawd, kev ua haujlwm rov ua haujlwm nyuaj, kev ncua sijhawm dhau los ua tsis tau, thiab kev ntseeg siab ntawm cov qauv txo qis heev.
Tus nqi tiag tiag ntawm kev tsis quav ntsej Z- Kev Ntsuas Kev Taw Qhia
Cov nqi zais tuaj yeem loj heev:
| Teeb meem | Qhov tshwm sim |
|
Vuam tawg |
Kho thiab sib tsoo |
| Cov yam ntxwv tsis xws luag | Kev soj ntsuam tsis ua haujlwm |
| Kev teeb tsa qeeb | Qhov project raug nplua |
| Re-kev tsim | Tus nqi nce loj |
| Ntev - teeb meem qaug zog | Txo kev pab lub neej |
Nyob rau hauv txawv teb chaws EPC tej yaam num, txawm me me vuam tsis ua hauj lwm tuaj yeem tsim kev sib cog lus loj.
Txoj Kev Kho: Yuav Ua Li Cas Cov Neeg Yuav Tsum Tiv Thaiv Qhov Kev pheej hmoo no
Cov kws tshaj lij steel cov neeg yuav khoom thiab cov neeg cog lus EPC tswj qhov kev pheej hmoo no txij thaum pib. Raws li cov tub lag luam ua lag luam raws caij nyoog nrog lub chaw ua haujlwm tshwj xeeb thiab kev sib txuas ncaj qha rau lub xeev loj - muaj cov mills, peb siv cov kev tswj xyuas meej rau peb cov khoom hnyav - cov dej num xa tawm.
- Qhia meej Z-Cov Lus Qhia Qhia Kom meej meej:Tsis txhob cia li xaj "Q355 steel phaj." Hloov chaw, qhia Q355B Z15, Q355D Z25, lossis Q355E Z35, nyob ntawm seb qhov project yuav tsum tau ua.
- Ntsuas phaj Thickness Ua tib zoo:Lub phaj tuab dua, qhov kev pheej hmoo ntau dua. Cov phiaj xwm siv 20mm+, 40mm+, 60mm+, lossis ultra- cov phaj hnyav yuav tsum ua tib zoo ntsuas los ntawm - qhov yuav tsum tau ua tuab.
- Tshawb xyuas Welding Design:Cov pob qij txha tseem ceeb yuav tsum tau soj ntsuam kom zoo, tshwj xeeb tshaj yog T-cov pob qij txha, cov pob qij txha sib txuas, thiab kev sib txuas tag nrho. Kev tsim vuam zoo yuav txo qhov kev pheej hmoo ntawm kev tsim kua muag.
- Yuav tsum tau thib peb-Party Testing:Cov haujlwm tshaj lij feem ntau xav tau Z-kev taw qhia tensile kuaj, kuaj ultrasonic (UT), thiab cov ntaub ntawv qhia txog kev taug qab ua ntej kev tsim khoom pib.
Thaum kawg Takeaway
Hauv cov txheej txheem steel hnyav, lub zog ib leeg tsis txaus. Lub phaj steel tuaj yeem ua tau raws li qhov yuav tsum tau muaj zog thaum tseem ua tsis tiav hauv lub sijhawm vuam. Tias yog vim li cas cov kev lag luam kev lag luam tau ua tib zoo mloog los ntawm - cov khoom tuab, Z- kev ntsuas kev taw qhia, thiab vuam kev ntxhov siab.
Rau cov qauv hnyav hnyav, xaiv lub phaj tsis yog tsis yog cov khoom siv yuam kev xwb. Nws yog ib qho kev pheej hmoo. Thiab nyob rau hauv txawv teb chaws muaj tej yaam num, zais structural txaus ntshai nws thiaj li ua kim project teeb meem.
Thiab nyob rau hauv txawv teb chaws muaj tej yaam num, zais structural txaus ntshai nws thiaj li ua kim project teeb meem.
