Ib txwm Microstructure Standards

 

Nruab nrab - carbon steel (nrog cov ntsiab lus carbon ntawm 0.25% thiab 0.60%) feem ntau muaj cov microstructure sib xyaw ntawm ferrite thiab pearlite. Nyob rau hauv lub xeev equilibrium, nws cov microstructure yog qhov ruaj khov. Ferrite feem ntau tshwm li dawb - xim pob los yog nplej, thaum pearlite yog microstructure nrog alternating txheej ntawm ferrite thiab cementite, qhia cov xim dub - thiab - dawb - kab txaij zoo ib yam li cov ntiv tes nyob rau hauv lub tshuab ntsuas qhov muag. Piv txwv li, tom qab normalizing kev kho mob, nruab nrab - carbon steel muaj ib tug kuj siab pearlite cov ntsiab lus, thiab lub pearlite lamellar qhov sib txawv kuj zoo ib yam, nrog ferrite faib nyob ib ncig ntawm lub pearlite.

 

Los ntawm kev xav ntau, nyob rau hauv ib txwm microstructure ntawm nruab nrab - carbon steel, cov ntsiab lus pearlite yog kwv yees li ntawm 50% thiab 90% (qhov kev faib ua feem txawv nyob ntawm cov ntsiab lus carbon), thiab cov ntsiab lus ferrite yog sib npaug ntawm 10% thiab 50% . Qhov kev sib raug zoo ntawm kev sib raug zoo no yog tus qauv siv tseem ceeb rau kev ntsuas qhov qub metallographic microstructure ntawm nruab nrab - carbon steel.

 

Decarburized Microstructure Judging Standards

 

Thaum decarburization tshwm sim, metallographic microstructure yuav hloov pauv loj. Qhov tseem ceeb tshaj plaws yog qhov txo qis ntawm pearlite thiab nce ferrite ntawm qhov chaw. Qhov tob ntawm txheej decarburized yog qhov tseem ceeb ntawm kev txiav txim siab ntsuas. Feem ntau, qhov tob ntawm decarburized txheej tuaj yeem txiav txim siab los ntawm kev soj ntsuam, los ntawm lub tshuab ntsuas metallographic, qhov kev ncua deb ntawm qhov chaw mus rau qhov chaw uas lub microstructure rov qab mus rau qhov qub. Hauv cov qauv tsim nyog, muaj qhov sib txawv tso cai ntawm decarburized txheej tob rau nruab nrab - carbon steel siv rau ntau lub hom phiaj. Piv txwv li, rau qee qhov nruab nrab - carbon steel mechanical qhov chaw nrog siab hnav - cov kev cai tiv thaiv, lub decarburized txheej qhov tob yuav tsum tau tswj tsis pub dhau 0.1mm.

 

Tsis tas li ntawd, qhov loj thiab morphological hloov ntawm ferrite nplej kuj tuaj yeem pom. Hauv thaj chaw decarburized, cov nplej ferrite tuaj yeem loj hlob thiab lawv cov kev faib tawm tuaj yeem ua tsis sib xws. Raws li ib txwm muaj, qhov loj ntawm ferrite nplej yog qhov sib xws, thaum tom qab decarburization, cov nplej ferrite yuav dhau los ua ntxhib hauv zos. Cov kev hloov pauv ntawm cov nplej loj thiab morphology kuj tseem yog lub hauv paus tseem ceeb rau kev txiav txim siab seb qhov nruab nrab - carbon steel yog decarburized thiab qhov twg ntawm decarburization.

 

 

 

 

Qib	Mechanical Property
	Tensile zog (MPa)	Yield zog (MPa)	% Elongation hauv 2 nti (50mm) min	Impacting Test Temperature (degree)
CCS A	400-520	235	22	20

 

 

 

 

 

 

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 CCS-A Shipbuilding Phaj, 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: Tuam Tshoj ccs-ib shipbuilding daim hlau lwm tus neeg, hoobkas