Seamless steel raj yog ib puag ncig, square, rectangular steel nrog ib tug hollow seem thiab tsis muaj seams nyob ib ncig ntawm nws.Seamless steel hlab yog ua los ntawm ingots los yog cov khoom billets perforated rau hauv capillary hlab thiab ces kub dov, txias dov los yog txias drawn.

Seamless steel yeeb nkab nrog hollow seem, ib tug loj tus naj npawb ntawm cov kav dej siv rau conveying kua, Nyob rau hauv lub dabtsi yog khoov thiab torsion zog nyob rau tib lub sij hawm, Sib piv steel yeeb nkab nrog puag ncig steel thiab lwm yam khoom steel.steel yeeb nkab luj yog lub teeb, yog ib hom kev lag luam. seem ntawm cov hlau, dav siv nyob rau hauv kev tsim khoom ntawm cov qauv thiab cov khoom siv kho tshuab, xws li roj drilling steel scaffolding.

Seamless steel tube ntau lawm muaj keeb kwm ze li ntawm 100 xyoo.Lub German Manismann cov kwv tij thawj zaug invented ob-roll cross-rolling punch nyob rau hauv 1885, ces invented lub periodic yeeb nkab dov tshuab nyob rau hauv 1891, thiab lub Swiss RCStiefel invented lub automatic yeeb nkab dov tshuab ( tseem hu ua cov yeeb nkab sab saum toj dov tshuab) hauv xyoo 1903, thiab ntau lub tshuab txuas ntxiv, xws li cov yeeb nkab txuas txuas txuas thiab cov yeeb nkab thawb tshuab, pib tsim cov kev lag luam niaj hnub seamless steel raj. tau txais yuav.

Extrusion xovxwm thiab lub caij txias dov zeb txhim kho ntau yam thiab zoo ntawm cov raj steel.Nyob rau hauv lub xyoo 1960, vim kev txhim kho ntawm kev nruam rolling yeeb nkab zeb, qhov tshwm sim ntawm peb-yob punch, tshwj xeeb tshaj yog kev vam meej ntawm daim ntawv thov ntawm nro txo ​​tshuab thiab nruam. casting billet, tau txhim kho kev tsim khoom thiab txhim kho kev sib tw ntawm seamless yeeb nkab thiab welded yeeb nkab.

Nyob rau xyoo 1970, cov yeeb nkab seamless thiab welded yeeb nkab tau sib koom ua ke, thiab lub ntiaj teb cov yeeb nkab yeeb nkab tso tawm tau nce ntau dua 5% hauv ib xyoos.Txij li xyoo 1953, Tuam Tshoj tau txuas nrog qhov tseem ceeb heev rau kev txhim kho seamless steel raj kev lag luam, thiab tau pib tsim cov txheej txheem ntau lawm rau dov ntau yam loj, nruab nrab thiab me kav. Feem ntau, cov yeeb nkab tooj liab kuj txais cov txheej txheem ntawm billet cross dov thiab perforation, yeeb nkab zeb dov thiab coil kos duab.

Daim ntawv thovthiab kev faib cov seamless steel raj

Daim ntawv thov: Seamless steel raj yog ib hom kev lag luam steel, muaj txoj haujlwm tseem ceeb hauv kev lag luam hauv lub tebchaws, dav siv hauv roj av, tshuaj lom neeg kev lag luam, boiler, fais fab chaw nres tsheb, nkoj, machinery manufacturing, tsheb, aviation, aerospace, zog, geology , kev tsim kho thiab kev ua tub rog.

Kev faib tawm:

(1) Raws li cov duab ntawm seem muab faib ua: voj voog seem raj, tshwj xeeb-shaped seem raj

(2) raws li cov khoom siv: carbon steel yeeb nkab, alloy steel yeeb nkab, stainless hlau yeeb nkab, cov yeeb nkab sib xyaw

(3) Raws li kev sib txuas hom: threaded txuas yeeb nkab, vuam yeeb nkab

(4) Raws li hom ntau lawm: kub dov (extrusion, sab saum toj, expansion) yeeb nkab, txias dov (rub) yeeb nkab

(5) Raws li kev siv: boiler yeeb nkab, roj zoo yeeb nkab, cov yeeb nkab yeeb nkab, cov yeeb nkab qauv, cov yeeb nkab yeeb nkab.

Seamless steel tube ntau lawm txheej txheem

Cov txheej txheem tseem ceeb ntawm cov kub dov seamless steel raj (cov txheej txheem tshuaj xyuas tseem ceeb):

Kev npaj thiab tshuaj xyuas cov yeeb nkab billet → cua sov ntawm cov yeeb nkab billet → perforating → dov yeeb nkab → reheating ntawm cov yeeb nkab khoob → kho (txo) txoj kab uas hla → kev kho cua sov → straightening ntawm cov yeeb nkab tiav → tiav → tshuaj xyuas (tsis muaj kev puas tsuaj, lub cev thiab tshuaj lom neeg, chaw nres tsheb tshuaj xyuas) → lub tsev khaws khoom

(2) Txias dov (kos duab) seamless steel yeeb nkab txheej txheem

Kev npaj Billet → pickling thiab lubrication → txias dov (kos duab) → tshav kub kho → straightening → tiav → tshuaj xyuas

Cov txheej txheem ntau lawm khiav daim ntawv ntawm kub dov seamless steel raj yog raws li nram no: