High Strength NK Shipbuilding Steel Phaj Qib AH32 DH32 AH36 EH36 Nrog Certification

High Strength NK Shipbuilding Steel Phaj Qib AH32, DH32, AH36, thiab EH36

Lub zog siab NK shipbuilding steel phaj ntawm qib AH32, DH32, AH36, thiab EH36 yog qhov tseem ceeb hauv kev lag luam shipbuilding. Cov hlau phaj no yog tus cwj pwm los ntawm lawv cov khoom zoo tshaj plaws thiab kev ua haujlwm txhim khu kev qha.

Tshuaj muaj pes tsawg leeg:
Cov tshuaj muaj pes tsawg leeg ntawm cov qib steel no yog tsim los ua kom tau raws li qhov xav tau ntawm cov khoom siv kho tshuab thiab lub cev. Lawv feem ntau muaj cov ntsiab lus xws li carbon, manganese, silicon, sulfur, thiab phosphorus nyob rau hauv tswj proportions. Cov ntsiab lus tshwj xeeb ntawm cov ntsiab lus no sib txawv nyob rau hauv cov kab lus tau hais kom ua tau raws li cov qauv tsim los ntawm NK faib pawg neeg.

Mechanical Properties:
Cov qib steel no muaj cov cuab yeej zoo heev. Qib AH32 muaj lub zog tawm ntawm yam tsawg kawg 315 MPa, lub zog tensile xws li 440 txog 590 MPa, thiab elongation tsis tsawg dua 22%. Qib DH32 qhia cov yam ntxwv zoo sib xws nrog qee yam kev txhim kho. Qib AH36 muab lub zog tawm los ntawm tsawg kawg yog 355 MPa thiab lub zog tensile xws li 490 txog 630 MPa, nrog rau qhov elongation tsawg kawg yog 21%. Qib EH36 ntxiv txhim kho cov tshuab ua haujlwm.

Cov qauv kev coj ua:
Cov hlau phaj no ua raws li cov qauv nruj thiab cov kev qhia tshwj xeeb uas tsim los ntawm NK (Nippon Kaiji Kyokai) kev faib tawm hauv zej zog, ua kom lawv cov khoom zoo thiab tsim nyog rau kev siv hauv kev tsim khoom hauv nkoj.

Txheej txheem ntau lawm:
Kev tsim cov hlau phaj no suav nrog cov txheej txheem ua kom zoo. Nws pib nrog kev xaiv cov khoom zoo raw khoom thiab txuas ntxiv los ntawm melting, casting, kub dov, thiab tswj kom txias. Kev tswj xyuas kev ua tau zoo tau ua tiav ntawm txhua theem los lav tias cov khoom kawg ua tau raws li qhov xav tau ntawm NK cov qauv.

Hauv kev xaus, lub zog siab NK shipbuilding steel daim hlau ntawm qib AH32, DH32, AH36, thiab EH36 yog cov khoom siv tseem ceeb hauv kev tsim cov nkoj, muab qhov tsim nyog lub zog, kav ntev, thiab kev nyab xeeb los tiv thaiv ib puag ncig marine nyuaj.

Cov txheej txheem tsim khoom ntawm lub zog siab NK marine steel feem ntau suav nrog cov kauj ruam hauv qab no:

1. Kev xaiv cov khoom siv raw: cov khoom siv zoo zoo raug xaiv, suav nrog cov khoom xws li hlau, carbon, manganese, thiab silicon, kom ntseeg tau tias cov khoom tseem ceeb ntawm cov hlau.
2. Smelting: Cov khoom siv raw yog smelted nyob rau hauv lub cub tawg. Los ntawm kev tswj xyuas qhov kub thiab txias, lub sijhawm, thiab lwm yam txheej txheem, ntau lub ntsiab lus tau sib xyaw ua ke los tsim cov hlau uas yuav tsum tau ua.
3. Refining: Ntxiv cov impurities los ntawm cov hlau molten kom purity ntawm cov hlau thiab txhim kho nws cov kev ua tau zoo.
4. Casting: Lub refined molten hlau yog cam khwb cia rau hauv billets.
5. Cua sov: Cov billets yog rhuab kom ncav cuag qhov tsim nyog dov kub.
6. Rolling: Los ntawm ntau dhau ntawm cov txheej txheem dov, cov billets maj mam dov mus rau hauv qhov xav tau tuab thiab cov duab. Thaum lub sij hawm dov txheej txheem, tsis xws li dov quab yuam, dov ceev, thiab kub yuav tsum tau tswj nruj me ntsis kom ntseeg tau qhov tseeb qhov tseeb thiab kev ua haujlwm ntawm cov hlau.
7. Tswj kev ua kom txias: tsim nyog txoj kev ua kom txias thiab cov nqi cua txias yog siv los ua kom cov hlau kom tau txais qhov zoo tshaj plaws microstructure thiab kev ua tau zoo thaum lub caij txias. Kev tswj cov cua txias muaj qhov tseem ceeb ntawm lub zog, toughness, thiab lwm yam khoom ntawm cov hlau.
8. Kev kho cua sov (yog tias tsim nyog): Nws yuav suav nrog cov txheej txheem kho cua sov xws li normalizing thiab tempering los kho cov microstructure thiab cov khoom ntawm cov hlau.
9. Kev tshuaj xyuas zoo: Ntau yam kev tshuaj xyuas zoo yog ua los ntawm cov khoom tsim marine steel, nrog rau kev tshuaj xyuas cov tshuaj muaj pes tsawg leeg, cov cuab yeej siv tshuab, thiab kev kuaj tsis muaj kev puas tsuaj, kom ntseeg tau tias nws ua tau raws li cov qauv thiab cov kev xav tau ntawm lub zog NK marine steel.

Cov txheej txheem tsim khoom tshwj xeeb yuav txawv nyob ntawm cov cuab yeej siv, thev naus laus zis, thiab cov khoom yuav tsum tau ua ntawm steel zeb. Piv txwv li, nyob rau hauv cov txheej txheem ntau lawm ntawm ib yam ntawm high-strength marine seem steel, ua ntej, ib daim duab plaub yog widened mus rau hauv ib tug ca billet los ntawm thawj flowering zeb (bd1). Cov txheej txheem yuav tsum nias grooves ntawm lub slab ua ntej thiab ces flattening lub protrusions ib sab ntawm cov grooves. Los ntawm zonal dov, lub elongation ntawm cov dov daim yog txo thiab qhov dav expansion yog nce. Piv nrog rau txoj kev dav dav dav dav, qhov dav dav dav tuaj yeem yog 30% ntau dua. Tom qab ntawd, lub tiaj tus billet yog dov mus rau hauv ib qho symmetrical profile los ntawm qhov thib ob tawg zeb (bd2). Qhov profile no muaj qhov xaus tuab thiab nyias nruab nrab, thiab lub phaj phaj qhia tau hais tias muaj cov duab wavy. Tom qab dov, qhov profile yog immersed nyob rau hauv ib tug quenching nruab nrab rau yuam kom txias rau ib tug tshwj xeeb kub thiab tuav rau ib lub sij hawm ntawm lub sij hawm, thiab ces rhuab thiab tuav dua. Tom qab ntawd, qhov profile yog dov mus rau hauv cov khoom pib los ntawm ob tandem ob-siab dov mills (drdf). Cov khoom siv thawj zaug muaj ob lub symmetrical web-connected noob flats. Muaj kev nyuaj siab ntawm qhov kev sib txuas ntawm ob lub symmetrical noob ca webs, thiab lub thickness ntawm kev nyuaj siab yog tsawg dua li ntawm lub teeb lub vas sab. Lub kaum sab xis suav nrog ntawm ob lub teeb symmetrical tiaj tus webs tsawg dua 180 degree. Tom qab ntawd, thawj cov khoom siv ua ke nrog cua txias thiab cua txias. Cov txheej txheem cua txias yog ua nyob rau hauv ib tug tshwj xeeb txias txaj Rhiav, uas tau txais stepped roj cua txias tshuab, kom lub txias npaum li cas thiab sib npaug cua txias, ua rau saum npoo ntawm lub teeb tiaj tus tusyees nrog me me dabtsi yog khoov deformation. Thaum kawg, cov khoom siv txias txias yog cais thiab ncaj.

 

NK GRADE cov cuab yeej muaj zog

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