A645 Nickel Alloy Steel Phaj

A645 Nickel Alloy Steel Phaj yog 5% npib tsib xee, quenched thiab tempered siab- lub nkoj phaj siv qhov twg cov hlau yuav tsum ua kom muaj kev cuam tshuam toughness ntawm cryogenic kub. Hauv LNG tso tsheb hlau luam, LEG / LPG cia nkoj, thiab qis- cov cuab yeej kub siab, cov neeg yuav khoom ib txwm tshawb xyuas ASTM A645 ua ke nrog Q&T mob, cuam tshuam- ntsuas kub, UT qib kev lees paub, cua sov- cov ntaub ntawv kho mob, thiab MTC traceability ua ntej kev pom zoo.

Tsis zoo li npib tsib xee-plated steel, ASTM A645 tsis yog cov khoom nto-coated. Nickel yog ntxiv thaum lub sij hawm steelmaking thiab ua hauj lwm los ntawm tag nrho cov phaj thickness tom qab dov thiab kub kho. Qhov no yog vim li cas cov khoom siv raug xaiv rau cov phaj plhaub, cov phaj hauv qab, thiab lwm qhov chaw khaws cia cryogenic qhov twg vuam kev ntseeg tau thiab qis - qhov kub thiab txias tsis kam yuav tsum tau lees paub ua ntej siv.

Hauv LNG thiab qis-kub qhov project cia, ASTM A645 phaj raug tshuaj xyuas ib ncig ntawm ib qho kev pheej hmoo tseem ceeb: nkig tawg tom qab rov ua kom txias thiab ua kom sov. Lub phaj yuav tsum ua kom muaj kev ruaj ntseg zoo tom qab dov, Q&T kev kho cua sov, txiav, sib sau, thiab vuam.

Rau LNG tank thiab cryogenic nkoj khoom, qib npe ib leeg tsis txaus rau kev pom zoo. Cov neeg yuav khoom feem ntau txheeb xyuas qhov cuam tshuam- ntsuas kub, UT qib kev lees paub, cua sov- kev kho kom raug, WPS/PQR sib raug zoo, thiab thib peb- tog tshuaj xyuas tuav cov ntsiab lus ua ntej kev tsim khoom pib.

Rau lub plhaub tuab lossis cov phaj hauv qab, kev tshuaj xyuas yog nruj dua vim tias kev kho vuam, cuam tshuam rov qab, thiab hloov phaj ua nyuaj tom qab txiav, sib sau, thiab ntau- hla vuam.

Cov ntsiab lus txiav txim feem ntau kuaj ua ntej ntau lawm

Ua ntej tshaj tawm daim ntawv xaj, feem ntau LNG thiab cryogenic tej yaam num ua ntej lees paub cov qauv phaj, qib, Q&T mob, cuam tshuam - qhov yuav tsum tau xeem, qib UT, thiab cov ntaub ntawv pob. Cov khoom no txiav txim siab seb cov khoom puas tuaj yeem nkag mus rau theem kev pom zoo tsim.

Rau LNG thiab cryogenic kev pab cuam, chemistry raug tshuaj xyuas ua ke nrog cov tawv tawv thiab kev pom zoo vuam. Cov ntsiab lus nickel txhawb qis- qhov kub thiab txias qhov kev ua tau zoo, thaum phosphorus thiab sulfur yog khaws cia kom qis kom txo tau cov kev pheej hmoo suav nrog, nkig- tawg rhiab heev, thiab vuam- muaj feem cuam tshuam.

Cov txiaj ntsig tshuaj tiag tiag yuav tsum ua raws li qhov kawg MTC, ASTM / ASME qhov yuav tsum tau ua, thiab pom zoo qhov project specification.

Rau A645 npib tsib xee alloy steel phaj, cov neeg yuav khoom ib txwm saib xyuas ntau dua txog qis- qhov kub thiab txias ruaj khov dua li chav tsev xwb - qhov kub thiab txias. Nyob rau hauv LNG fabrication, lub phaj yuav tsum txhim khu kev qha tom qab dov, quenching, tempering, txiav, sib sau, thiab vuam.

Rau A645 npib tsib xee alloy steel phaj, kev tshuaj xyuas txhua yam tsom rau kev ua kom tawv nqaij tawv, tensile zog, NDTT, thiab Z- kev taw qhia kev ua haujlwm. Hauv LNG fabrication, cov txiaj ntsig no tau kuaj xyuas ua ke nrog dov, Q&T kev kho cua sov, txiav, tsim, thiab cov ntaub ntawv vuam.

Rau ASTM A645 phaj, kev kho cua sov muaj kev cuam tshuam ncaj qha rau kev ua haujlwm cryogenic kawg. Tom qab tswj dov, lub phaj feem ntau mus los ntawm quenching thiab tempering kom stabilize microstructure thiab txhim kho toughness sib xws thoob plaws lub phaj thickness.

Thaum lub sij hawm tsim khoom, cov ntsiab lus tseem ceeb tswj tau suav nrog cov ntsiab lus npib tsib xee, tswj impurity, dov txo, quenching kub, tempering txheej txheem, thiab txias txias. Rau LNG tank phaj, cov neeg yuav khoom feem ntau tshuaj xyuas cov cua sov- cov ntaub ntawv kho mob ua ke nrog MTC, UT daim ntawv qhia, thiab cuam tshuam - cov ntaub ntawv xeem.

Ua ntej ua zaub mov xa tuaj, phaj saum npoo, qhov ntev, kos npe, tus lej xov tooj cua sov, thiab cov ntaub ntawv taug qab yuav tsum tau kuaj xyuas kom paub meej tias cov phaj xa tuaj sib tw cov ntaub ntawv pom zoo.

Rau ASTM A645 / 5Ni nickel alloy steel phaj, cov neeg yuav khoom feem ntau tshawb xyuas tag nrho cov kev tsim khoom ua ntej LNG lossis cryogenic project pom zoo. Cov ntsiab lus tshuaj xyuas tseem ceeb tsis txwv rau qib npe, tab sis kuj suav nrog Q&T mob, cuam tshuam - cov txiaj ntsig kev xeem, UT kev lees txais, phaj cim, thiab cua sov- lej traceability.

Txoj kev ib txwm muaj xws li steelmaking, slab conditioning, tswj dov, quenching thiab tempering, txiav thiab sampling, mechanical testing, UT inspection, dimensional checking, and packing release.

Thaum lub sij hawm steelmaking, phosphorus thiab sulfur yog tswj los txo cov kev pheej hmoo ntawm kev koom nrog. Thaum lub sij hawm dov thiab Q&T kev kho mob, kev tswj kub thiab txo qhov sib piv cuam tshuam rau cov nplej refinement thiab los ntawm - thickness toughness sib xws.

Ua ntej xa khoom xa tuaj, MTC, UT daim ntawv tshaj tawm, cov ntaub ntawv kho cua sov- cov ntaub ntawv kho mob, cuam tshuam- cov txiaj ntsig kev xeem, phaj cim, thiab thib peb- cov ntaub ntawv tshuaj xyuas tog neeg yuav tsum ua raws li kev pom zoo LNG lossis cryogenic project.

Rau cryogenic npib tsib xee alloy steel, microstructure stability yog ze ze rau kev cuam tshuam toughness thiab nkig - tawg tsis kam. Ua tiav 5Ni steel phaj feem ntau qhia tau tias tempered martensite nrog me me ntawm reverted austenite tom qab Q&T kho.

Nyob rau hauv LNG cia tej yaam num, tsis ruaj tsis khov microstructure, nruab nrab segregation, los yog kev tswj tsis zoo yuav txo tau cov kab nrib pleb nyob rau hauv rov qab txias txias. Tias yog vim li cas metallographic tshuaj xyuas, suav nrog kev ntsuas, UT kev tshuaj xyuas, NDTT qhov tshwm sim, thiab cuam tshuam -cov ntaub ntawv xeem feem ntau raug kuaj ua ke thaum pom zoo cov khoom siv.

Rau 25 hli thiab 50 hli 5Ni steel daim hlau, NDTT hauv qab -120℃thiab kev tswj kev suav nrog ntawm D1 / DS0.5 qib tuaj yeem pab txhawb kev puas tsuaj kev nyab xeeb hauv LNG thiab cryogenic cia tej yaam num.

Vuam kev ua tau zoo yog ib qho ntawm cov ntsiab lus tshuaj xyuas tseem ceeb rau ASTM A645 phaj siv hauv LNG tso tsheb hlau luam thiab cov hlab ntsha cryogenic. Lub hauv paus phaj tuaj yeem ua tau raws li ASTM A645, tab sis qhov sib txuas welded yuav tsum muaj qhov qis dua - kub toughness tom qab fabrication.

Hauv kev tsim cov phiaj xwm tiag tiag, cov kws ua haujlwm feem ntau tshuaj xyuas cov khoom siv hluav taws xob, kev ua haujlwm ua ntej, HAZ hardness, hydrogen cracking tiv thaiv, PWHT cawv, thiab WPS / PQR cov ntaub ntawv. Rau tuab SA645 phaj, thib peb- tog neeg pom kev vuam tsim nyog yuav raug thov ua ntej kev tsim khoom pib.

Y-groove crack testing for 5Ni steel at room temperature and 50℃preheating condition pom 0% deg crack rate, 0% root crack rate, and 0% section crack rate in tested samples, support welding crack-resistance evaluation for cryogenic fabrication.

Rau thaj chaw vuam ntawm cov phaj hlau cryogenic, cov hlau nplaum seem yuav raug kuaj xyuas ua ntej fabrication vim tias cov hlau nplaum ntau dhau tuaj yeem cuam tshuam rau arc stability thiab weld hlaws tswj.

Nyob rau hauv LNG tank fabrication, tiav 5Ni steel phaj yog ib txwm kuaj ntawm lub phaj nto, phaj fab, thiab weld npaj chaw. Qhov seem hlau nplaum feem ntau yuav tsum tau qis dua 50 GS. Cov phaj tiav tuaj yeem tswj tau tsis pub dhau 30 GS, nrog cov phaj kaum hauv 20 GS thiab feem ntau lwm txoj haujlwm hauv 10 GS.

Kev tuav kom zoo tom qab kev kho cua sov, txo qhov raug cov khoom sib nqus muaj zog, thiab ntsuas ua ntej fabrication pab tswj kev cuam tshuam ntawm vuam cuam tshuam.

A645 nickel alloy steel phaj yog tsuas yog siv hauv LEG cia tso tsheb hlau luam, LPG cia tso tsheb hlau luam, VLEC tso tsheb hlau luam, LNG roj tso tsheb hlau luam, cov hlab ntsha cryogenic siab, thiab cov khoom siv hluav taws xob qis qis.

Qhov tseeb 5Ni / 5.5Ni cov ntaub ntawv qhov project suav nrog A645 Gr.B phaj rau LEG cia tank daim ntaub ntawv, SA-645 Gr.A phaj rau 30000 m³ LPG cia tank, thiab 5.0Ni steel phaj rau 100000 CBM VLEC project. Cov ntaub ntawv siv no tuaj yeem txhawb nqa kev ntsuas tus neeg yuav khoom rau cov ntawv thov khaws cia cryogenic.

Rau LNG thiab cryogenic tej yaam num, muaj feem xyuam rau kev soj ntsuam los yog kev pom zoo tej zaum yuav muaj SGS, BV, DNV, LR, ABS, CCS, TÜV, los yog lwm yam project-cov koom haum tshwj xeeb.

ASTM A645 yog npib tsib xee alloy steel, tsis yog npib tsib xee-plated steel. Cov nickel yog ib feem ntawm cov hlau chemistry thiab ua haujlwm los ntawm tag nrho cov phaj tuab tom qab dov thiab kho cua sov.

Nickel{0}}plated steel tsuas muaj nickel txheej ntawm qhov chaw. Nws tuaj yeem txhim kho qhov tsos lossis qhov chaw corrosion tsis kam, tab sis nws tsis tuaj yeem muab tib yam los ntawm -thickness cryogenic toughness xav tau rau LNG tso tsheb hlau luam, cryogenic siab hlab ntsha, los yog cov tub yees hydrocarbon systems.

FAQ

 

 

Q1: Puas yog ASTM A645 phaj ib txwm muab rau hauv Q&T mob?

A1: Yog. Rau LNG thiab cryogenic kev pab cuam, ASTM A645 phaj yog ib txwm muab nyob rau hauv quenched thiab tempered mob kom ua tau ruaj khov qis - kub toughness.

Q2: Vim li cas 5% nickel tseem ceeb hauv A645 steel phaj?

A2: Nickel txhim kho qis- kub toughness thiab tawg tiv thaiv los ntawm tag nrho cov phaj tuab, uas yog ib qho tseem ceeb rau LNG tso tsheb hlau luam thiab cov khoom siv cryogenic siab.

Q3: Cov ntaub ntawv dab tsi feem ntau xav tau rau A645 phaj kev pom zoo?

A3: MTC, UT tsab ntawv ceeb toom, cuam tshuam- daim ntawv xeem, cov ntaub ntawv kho cua sov- cov ntaub ntawv kho mob, phaj traceability, WPS/PQR compatibility tshuaj xyuas, thiab EN 10204 3.1 / 3.2 cov ntaub ntawv feem ntau thov.

Q4: ASTM A645 phaj puas tuaj yeem muab nrog rau thib peb-kev tshuaj xyuas?

A4: Yog. SGS, BV, DNV, LR, ABS, CCS, TÜV, los yog lwm yam thib peb - tog tshuaj ntsuam xyuas tuaj yeem npaj raws li qhov yuav tsum tau ua.

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