Steel Shipbuilding Phaj Nqe EH36

Cov ntsiab lus impurity muaj qhov cuam tshuam tseem ceeb rau qhov toughness ntawm high-strength steel, feem ntau manifested raws li nram no:
I. Kev cuam tshuam ntawm sulfur (S)
Sulfur feem ntau muaj nyob rau hauv daim ntawv ntawm sulfides nyob rau hauv steel. Cov kev cuam tshuam tseem ceeb yog:
Txo toughness: Sulfides yog ib qho yooj yim los tsim elongated inclusions nyob rau hauv steel, xws li MnS. Cov kev suav nrog no yuav dhau los ua cov ntsiab lus ntawm kev ntxhov siab thiab ua rau nws pib thiab nthuav cov kab nrib pleb thaum muaj kev ntxhov siab, yog li txo qhov hnyav ntawm cov hlau. Piv txwv li, thaum lub zog siab steel raug cuam tshuam rau kev thauj khoom, cov pob txha tawg tuaj yeem tshwm sim thawj zaug ntawm sulfide inclusions, ua rau cov hlau tsis zoo.
Muaj feem cuam tshuam rau kev ua haujlwm vuam: Sulfur kuj muaj qhov cuam tshuam tsis zoo rau kev ua haujlwm vuam ntawm cov hlau. Thaum lub sij hawm welding txheej txheem, sulfides yuav ua rau kom txo tau lub toughness ntawm vuam tshav kub-cuam tshuam cheeb tsam thiab ua rau kom muaj kev pheej hmoo ntawm tawg nyob rau hauv lub welded ob leeg.
II. Kev cuam tshuam ntawm phosphorus (P)
Lub ntsiab cuam tshuam ntawm phosphorus hauv steel yog raws li nram no:
Ua kom brittleness: Phosphorus yooj yim rau kev sib cais ntawm cov ciam teb nplej thiab txo cov qoob loo ciam teb kev sib raug zoo, ua rau cov hlau nkig ntawm qhov kub qis. Qhov no yuav ua rau muaj kev poob qis hauv qhov toughness ntawm high-strength steel, tshwj xeeb tshaj yog kub-kub toughness. Piv txwv li, nyob rau hauv high-strength steel qauv siv nyob rau hauv txias ib puag ncig, yog hais tias cov ntsiab lus phosphorus siab dhau lawm, cov qauv yuav ua rau nkig tawg thaum muaj kev cuam tshuam.
cuam ​​tshuam rau kev ua haujlwm: Cov ntsiab lus phosphorus siab yuav cuam tshuam rau kev ua haujlwm ntawm cov hlau. Hlau yog feem ntau ua rau tawg thiab lwm yam tsis xws luag thaum dov thiab forging txheej txheem, ntxiv txo cov toughness thiab zoo ntawm hlau.
III. Kev cuam tshuam ntawm hydrogen (H)
Qhov cuam tshuam ntawm hydrogen rau ntawm qhov toughness ntawm high-strength steel yog mas manifested li:
Ua rau hydrogen embrittlement: Hydrogen atoms tuaj yeem sib txawv hauv cov hlau thiab sib sau ntawm qhov tsis xws li dislocations thiab inclusions. Thaum cov hydrogen concentration nce mus txog ib theem, nws yuav ua rau ib tug ntse poob nyob rau hauv lub toughness ntawm hlau thiab tshwm sim ntawm hydrogen embrittlement. High-strength steel yog rhiab heev rau hydrogen embrittlement. Txawm tias ib qho me me ntawm hydrogen tuaj yeem ua rau poob hnyav. Piv txwv li, nyob rau hauv lub vuam txheej txheem ntawm high-lub zog hlau, yog hais tias cov hydrogen cov ntsiab lus nyob rau hauv lub vuam yog siab dhau lawm, ncua kev tawg yuav tshwm sim tom qab vuam, cuam tshuam rau lub toughness thiab kev ruaj ntseg ntawm cov hlau.
Ua rau qaug zog kev ua haujlwm: Hydrogen kuj tseem yuav txo qhov qaug zog lub neej ntawm cov hlau. Nyob rau hauv alternating loads, lub xub ntiag ntawm hydrogen yuav accelerate qhov pib thiab nthuav ntawm cov kab nrib pleb thiab txo qhov qaug zog kev ua tau zoo ntawm high-strength steel.
 

 

 

 

Nov yog qee txoj hauv kev los txo cov sulfur cov ntsiab lus hauv cov hlau muaj zog:
I. Raw khoom tswj
Xaiv cov khoom siv uas tsis muaj sulfur:
Thaum lub sij hawm tsim cov hlau thiab hlau, xaiv cov khoom siv raw xws li hlau ore, coke, thiab cov hlau seem uas tsis muaj leej faj. Piv txwv li, qib high-qib hlau ore tuaj yeem muab qhov tseem ceeb, vim nws cov ntsiab lus sulfur yog qhov tsawg. Qee cov khoom siv hlau zoo tshaj plaws feem ntau muaj cov ntsiab lus tsis tshua muaj leej faj, uas tuaj yeem txo cov leej faj hauv cov hlau muaj zog.
Rau kev xaiv cov khoom seem hlau, kev tshawb nrhiav nruj thiab kev tshuaj xyuas yuav tsum tau ua kom tsis txhob siv cov khoom seem uas muaj cov ntsiab lus sulfur siab. Cov txheej txheem kev kuaj xyuas cov khoom seem hlau tuaj yeem tsim tau, thiab kev tshuaj xyuas tshuaj thiab lwm txoj hauv kev tuaj yeem siv los txiav txim siab cov ntsiab lus ntawm cov tooj liab hauv cov seem hlau los xyuas kom meej tias cov khoom siv hlau ua tau raws li qhov yuav tsum tau muaj sulfur tsawg.
Optimize raw khoom pretreatment:
Preprocess hlau ore los ntawm cov txheej txheem xws li sib nqus sib nqus thiab flotation, uas tuaj yeem tshem tawm qee cov sulfur-muaj cov zaub mov thiab txo cov leej faj cov ntsiab lus hauv cov hlau ore. Piv txwv li, los ntawm cov txheej txheem flotation, sulfur-muaj cov zaub mov tuaj yeem raug cais tawm ntawm cov hlau ore los txhim kho cov purity ntawm hlau ore.
Desulfurize coke. Qee cov thev naus laus zis thev naus laus zis coke desulfurization xws li kub kub thermal desulfurization thiab tshuaj desulfurization tuaj yeem raug coj los ua kom txo qis cov ntsiab lus ntawm cov sulfur hauv coke thiab txo cov ntsiab lus ntawm cov sulfur thaum lub sij hawm steelmaking.
II. Steelmaking txheej txheem tswj
Kub hlau pretreatment:
Kub hlau desulfurization kev kho mob yog qhov txuas tseem ceeb hauv kev txo cov sulfur cov ntsiab lus hauv cov hlau muaj zog. Cov txheej txheem desulfurization xws li kev txhaj tshuaj thiab txoj kev nplawm tuaj yeem siv tau. Desulfurizers (xws li txiv qaub, magnesium hmoov, thiab lwm yam) ntxiv rau cov hlau kub kom hnov ​​​​mob nrog sulfur los ua sulfides thiab tshem tawm lawv. Piv txwv li, siv magnesium-raws li desulfurizers rau kub hlau txhaj tshuaj desulfurization tuaj yeem txo cov sulfur ntsiab lus hauv cov hlau kub mus rau qib qis heev.
Tswj tsis tau xws li kub, lub sij hawm, thiab stirring siv ntawm kub hlau pretreatment los txhim kho desulfurization nyhuv. Tsim nyog nce qhov kub ntawm pretreatment tuaj yeem txhawb cov tshuaj tiv thaiv desulfurization. Nthuav lub sijhawm kho thiab ua kom lub zog sib zog tuaj yeem ua rau cov desulfurizer tag nrho kev sib cuag nrog cov hlau kub thiab txhim kho cov desulfurization efficiency.
Optimization ntawm steelmaking txheej txheem:
Thaum siv oxygen converter steelmaking los yog hluav taws xob rauv steelmaking, tsim nyog tswj cov txheej txheem steelmaking tsis xws li oxygen tshuab siv thiab slagging system kom txo tau cov kev taw qhia thiab tiam ntawm leej faj. Piv txwv li, nyob rau hauv oxygen converter steelmaking, tswj cov pa tshuab lub sij hawm thiab siv tau zoo kom tsis txhob oxidation ntau dhau thiab txo txoj kev pheej hmoo ntawm leej faj nkag mus rau molten hlau los ntawm tus nqi.
Ua kom zoo dua cov txheej txheem slagging, xaiv cov khoom tsim nyog xws li txiv qaub thiab fluorite, thiab tsim cov slag nrog cov alkalinity siab thiab fluidity zoo, uas yog qhov zoo rau absorbing sulfur hauv cov hlau molten. Los ntawm kev kho cov muaj pes tsawg leeg thiab cov khoom ntawm cov slag, lub peev xwm desulfurization ntawm slag tuaj yeem txhim kho.
Secondary refining:
Kev siv cov thev naus laus zis thev naus laus zis xws li LF (ladle refining) thiab RH (lub tshuab nqus tsev degassing) tuaj yeem txo cov sulfur cov ntsiab lus hauv cov hlau muaj zog. Thaum lub sij hawm LF refining txheej txheem, leej faj hauv cov hlau tuaj yeem raug tshem tawm zoo los ntawm kev ntxiv cov desulfurizers thiab nplawm cov hlau molten. RH refining yog ua tiav nyob rau hauv lub tshuab nqus tsev, uas tuaj yeem txhawb kev hloov ntawm cov sulfur hauv cov hlau molten rau slag lossis roj theem, yog li txo cov sulfur cov ntsiab lus hauv cov hlau.
Tswj tsis tau xws li kub, lub sij hawm, thiab stirring siv ntawm theem nrab refining los txhim kho cov nyhuv desulfurization. Tsim nyog nce qhov kub thiab txias tuaj yeem txhim kho cov haujlwm ntawm desulfurizer. Kev ncua sij hawm ua kom zoo tuaj yeem ua rau cov tshuaj tiv thaiv desulfurization txaus txaus. Kev ua kom muaj zog ntxiv tuaj yeem txhawb kev sib xyaw thiab cov tshuaj tiv thaiv ntawm cov hlau molten thiab cov desulfurizer.
III. Kev kho mob tom ntej
Nruam casting txheej txheem tswj:
Thaum lub sij hawm nruam casting txheej txheem, coj kev tiv thaiv casting ntsuas los tiv thaiv cov hlau molten los ntawm kev sib cuag nrog huab cua thiab tsis txhob oxidation theem nrab ntawm leej faj. Cov khoom siv tiv thaiv casting xws li cov nozzles ntev thiab cov twj tso kua mis submerged tuaj yeem siv los txo qhov nce ntawm cov ntsiab lus sulfur hauv cov hlau molten.
Optimize nruam casting txheej txheem tsis xws li casting ceev thiab txias siv los tswj qhov zoo ntawm slab thiab txo sulfur segregation thiab inclusion cov ntsiab lus nyob rau hauv lub slab, yog li txhim kho qhov zoo ntawm high-strength steel.
Kev kho cua sov steel:
Kev kho cua sov kom tsim nyog xws li normalizing thiab tempering tuaj yeem ua rau cov hlau muaj zog los txhim kho cov qauv hlau thiab txo cov teeb meem ntawm cov sulfur. Thaum lub sij hawm kho cua sov txheej txheem, lub diffusion thiab uniform tis ntawm leej faj nyob rau hauv cov hlau yuav txhawb, lub zos enrichment ntawm leej faj yuav txo tau, thiab lub toughness thiab kev ua tau zoo ntawm cov hlau tuaj yeem txhim kho.
Los ntawm kev ua tiav daim ntawv thov ntawm cov txheej txheem saum toj no, cov ntsiab lus sulfur hauv cov hlau muaj zog tuaj yeem txo qis thiab qhov zoo thiab kev ua haujlwm ntawm cov hlau tuaj yeem txhim kho.

Vim li cas thiaj xaiv peb?
Peb txaus siab rau peb lub peev xwm los muab cov kev cai daws teeb meem rau peb cov neeg siv khoom cov kev xav tau tshwj xeeb.
Peb txheeb xyuas thiab sib piv cov khoom dhau los thiab cov xwm txheej tam sim no ntawm peb Cov Hlau Shipbuilding Plate Nqe EH36, thiab tsim cov kev qhia tshiab thiab cov txheej txheem.
Peb cov neeg siv khoom ntseeg peb kom xa cov khoom zoo Cold-rolled Steel khoom raws sij hawm thiab ntawm pob nyiaj siv.
Peb nruj me ntsis siv cov kev pab cuam sov so thiab kev xav tom qab muag, ua raws li kev txhim kho kev ua haujlwm zoo.
Peb muab ntau hom Cold-rolled Steel khoom kom tau raws li cov neeg siv khoom xav tau.
Peb ua raws li cov neeg siv khoom-centric thiab hom-taw qhia kev lag luam lub tswv yim, thiab txuas ntxiv muab cov neeg siv khoom lag luam txhim khu kev qha thiab zoo heev thiab cov kev pabcuam.
Peb lub Hoobkas tau cog lus los txhawb nqa cov qauv siab tshaj plaws ntawm kev nyab xeeb thiab zoo.
Txhua tus neeg ua haujlwm ntawm peb lub tuam txhab thiab txhua lub tuam haujlwm ua haujlwm ua ke los ua ke kev tswj hwm kev lag luam, kev tshaj lij thev naus laus zis, kev txheeb cais ntau thiab kev kawm ideological.
Peb cov khoom siv Cold-rolled Steel paub txog lawv cov kav ntev thiab kev ntseeg tau.
Kev vam khom rau qhov zoo tshaj plaws thiab muaj txiaj ntsig zoo ntawm cov khoom loj, peb muaj peev xwm ua tau raws li qhov sib txawv ntawm peb cov neeg siv khoom.

Cim npe nrov: steel shipbuilding phaj nqe daim ntawv eh36, Tuam Tshoj steel shipbuilding phaj nqe daim ntawv eh36 lwm tus neeg, hoobkas