1. Metallography
Metallography yog ib txoj hauv kev tseem ceeb rau kev paub qhov txawv welded steel kav los ntawmseamless steel kav. High-frequency resistance welded steel kav tsis ntxiv vuam cov ntaub ntawv, yog li cov vuam seam nyob rau hauv welded steel yeeb nkab yog nqaim heev. Yog tias txoj kev sib tsoo ntxhib thiab siv corrosion, qhov vuam seam tsis tuaj yeem pom meej. Thaum lub high-frequency kuj welded steel yeeb nkab yog welded thiab tsis tau txais kev kho cua sov, lub weld qauv yuav tseem ceeb txawv ntawm cov niam txiv cov khoom ntawm cov yeeb nkab steel. Nyob rau lub sijhawm no, txoj kev metallographic tuaj yeem siv los ua kom paub qhov txawv ntawm cov kav hlau welded los ntawm seamless steel kav. Nyob rau hauv tus txheej txheem ntawm qhov txawv ntawm ob lub kav hlau, nws yog ib qho tsim nyog yuav tsum tau txiav cov qauv me me nrog qhov ntev thiab dav ntawm 40mm ntawm qhov vuam taw tes, ua kev sib tsoo ntxhib, zoo sib tsoo thiab polishing, thiab tom qab ntawd soj ntsuam cov qauv hauv lub tshuab ntsuas metallographic. Thaum ferrite thiab widmanstatten, niam txiv cov ntaub ntawv thiab weld cheeb tsam qauv raug soj ntsuam, welded steel yeeb nkab thiab seamless steel yeeb nkab yuav raug qhov txawv.
2. Corrosion txoj kev
Nyob rau hauv tus txheej txheem ntawm kev siv cov txheej txheem corrosion kom paub qhov txawv welded steel kav thiab seamless steel kav, lub vuam ntawm cov txheej txheem welded steel yeeb nkab yuav tsum tau polished. Tom qab polishing tiav, cov cim polishing yuav tsum pom. Tom qab ntawd, lub ntsej muag kawg yog polished nrog sandpaper ntawm weld, thiab lub ntsej muag kawg yog kho nrog 5% nitric acid cawv. Yog hais tias pom tseeb weld tshwm, nws tuaj yeem ua pov thawj tias cov yeeb nkab steel yog welded steel yeeb nkab. Tsis muaj qhov sib txawv ntawm qhov kawg ntawm lub ntsej muag ntawm seamless steel yeeb nkab tom qab corrosion.
3. Distinguishing welded steel kav thiab seamless steel kav raws li tus txheej txheem
Nyob rau hauv tus txheej txheem ntawm qhov txawvwelded steel kavthiab seamless steel kav raws li cov txheej txheem, tag nrho cov welded steel kav yog welded raws li cov txheej txheem xws li txias dov thiab extrusion. Tsis tas li ntawd, thaum high-frequency, low-frequency arc vuam kav thiab tsis kam vuam kav yog siv los vuam steel kav, kauv yeeb nkab vuam thiab ncaj seam yeeb nkab vuam yuav tsim, uas yuav tsim round steel kav, square steel kav, oval steel. cov kav dej, daim duab peb sab steel kav, hexagonal steel kav, wilted steel kav, octagonal steel kav, thiab txawm ntau complex steel kav. Nyob rau hauv luv luv, cov txheej txheem sib txawv yuav tsim cov kav hlau ntawm cov duab sib txawv, kom cov kav hlau welded thiab seamless steel kav tuaj yeem ua kom pom tseeb. Txawm li cas los xij, nyob rau hauv tus txheej txheem ntawm kev sib txawv seamless steel kav raws li tus txheej txheem, lawv feem ntau txawv raws li kub dov thiab txias dov txoj kev kho mob, thiab seamless steel kav kuj muaj ob lub ntsiab, uas yog kub dov seamless steel kav thiab txias- dov seamless steel kav. Kub dov seamless steel kav yog tsim los ntawm perforation, dov thiab lwm yam txheej txheem, tshwj xeeb tshaj yog loj-inch thiab tuab seamless steel kav yog welded los ntawm cov txheej txheem no; Cov kav dej txias txias yog tsim los ntawm kev kos duab txias ntawm cov kav dej, thiab lub zog ntawm cov khoom siv qis dua, tab sis nws cov txheej txheem sab nrauv thiab sab hauv yog du.
Post lub sij hawm: May-17-2024