Welded Vs. Seamless Steel Yeeb Nkab

Thaum muaj ntau txoj kev tsim cov yeeb nkab, qhov kev sib tham tseem ceeb tshaj plaws hauv kev lag luam yog muab piv rau hluav taws xob tiv thaiv welded (ERW) steel yeeb nkab thiab seamless (SMLS) steel yeeb nkab.Welded yeeb nkab pib tawm raws li ntev, coiled sawb ntawm hlau, hu ua a strip. Lub sawb yog txiav mus rau qhov xav tau ntev, uas ua rau lub tiaj tiaj, lub phaj. Qhov dav ntawm qhov luv luv ntawm lub phaj dhau los ua lub voj voog sab nraud ntawm cov yeeb nkab, tus nqi siv los xam nws qhov kawg sab nraud txoj kab uas hla. Lub phaj plaub yog dhau los ntawm lub tshuab dov, qhov ntev ntawm sab yog dov mus rau ib leeg los tsim ib lub tog raj kheej. Nyob rau hauv tus txheej txheem ERW, ib tug high-frequency tam sim no kis ntawm cov npoo, ua rau lawv yaj thiab fuse ua ke. Ib qho txiaj ntsig ntawm ERW yeeb nkab yog tias tsis muaj fusion hlau siv, thiab cov vuam tsis pom thiab tsis pom. Qhov no yog qhov sib piv rau ob chav submerged arc welding (DSAW), uas tawm ntawm cov hlaws zoo nkauj uas yuav tsum tau muab tshem tawm nyob ntawm daim ntawv thov. Tau ntau xyoo, welded yeeb nkab tsim tshuab tau txuas ntxiv txhim kho. Tej zaum qhov kev nce qib tseem ceeb tshaj plaws yog kev txav mus rau kev siv cov khoom siv hluav taws xob siab rau vuam. Ua ntej xyoo 1970s, cov khoom siv hluav taws xob tsawg tau siv. Low-frequency ERW tsim cov welds uas muaj kev cuam tshuam rau corrosion thiab weld puas. Feem ntau welded yeeb nkab hom xav tau kev kho cua sov tom qab kev tsim khoom.

Seamless yeeb nkab pib ua ib qho khoom, cylindrical daim hlau hu ua billet. Thaum lub billet tseem kub, ib tug mandrel yog siv los tho lub billet los ntawm qhov chaw. Cov kauj ruam tom ntej yog dov thiab ncab lub hollow billet. Lub billet yog precisely dov thiab ncab kom txog thaum nws ncav cuag qhov ntev, txoj kab uas hla, thiab phab ntsa thickness teev los ntawm tus neeg muas zaub qhov kev txiav txim.
Qee cov kav dej seamless harden thaum lub sijhawm tsim khoom, yog li lawv tsis xav tau kev kho cua sov tom qab kev tsim khoom. Lwm cov kav dej yuav tsum tau kho cua sov.

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