Cov yeeb nkab hlau tsis muaj qhov (seamless steel tube) yog ib lub voj voog, plaub fab, thiab plaub fab uas muaj ib ntu hollow thiab tsis muaj seams nyob ib puag ncig nws. Cov yeeb nkab hlau tsis muaj qhov (seamless steel tube) yog ua los ntawm cov ingots lossis cov billets khov kho uas perforated rau hauv cov yeeb nkab capillary thiab tom qab ntawd kub dov, txias dov lossis txias kos.

Cov yeeb nkab hlau tsis muaj qhov sib txuas nrog qhov seem hollow, ntau cov yeeb nkab siv rau kev xa cov kua dej, Hauv lub zog khoov thiab torsion tib lub sijhawm, Sib piv cov yeeb nkab hlau nrog cov hlau puag ncig thiab lwm cov hlau khov kho. Cov yeeb nkab hlau hnyav yog lub teeb, yog ib hom kev lag luam ntawm cov hlau, siv dav hauv kev tsim cov khoom siv thiab cov khoom siv kho tshuab, xws li roj drilling steel scaffolding.

Kev tsim cov raj hlau tsis muaj seamless muaj keeb kwm ze li ntawm 100 xyoo. Cov kwv tij German Manismann tau tsim thawj lub tshuab ntaus ob-yob hla-yob hauv xyoo 1885, tom qab ntawd tau tsim lub tshuab dov yeeb nkab tsis tu ncua hauv xyoo 1891, thiab Swiss RCStiefel tau tsim lub tshuab dov yeeb nkab tsis siv neeg (tseem hu ua lub tshuab dov yeeb nkab sab saum toj) hauv xyoo 1903, thiab ntau yam tshuab txuas ntxiv, xws li lub tshuab dov yeeb nkab tas mus li thiab lub tshuab thawb yeeb nkab, tau pib tsim kev lag luam raj hlau tsis muaj seamless niaj hnub. Hauv xyoo 1930, lub tshuab zeb yeeb nkab peb-yob tau raug saws.

Cov xovxwm extrusion thiab lub tshuab dov txias tsis tu ncua txhim kho ntau yam thiab zoo ntawm cov kav hlau. Xyoo 1960, vim muaj kev txhim kho ntawm cov yeeb nkab dov tas mus li, qhov tshwm sim ntawm peb-yob punch, tshwj xeeb tshaj yog kev vam meej ntawm kev siv lub tshuab txo qhov nro thiab cov hlau txuas ntxiv casting, tau txhim kho kev ua haujlwm ntau lawm thiab txhim kho kev sib tw ntawm cov yeeb nkab seamless thiab cov yeeb nkab welded.

Xyoo 1970, cov yeeb nkab seamless thiab cov yeeb nkab welded tau sib tw nrog ib leeg, thiab cov yeeb nkab steel thoob ntiaj teb tau nce ntau dua 5% ib xyoos. Txij li xyoo 1953, Tuam Tshoj tau muab qhov tseem ceeb rau kev txhim kho kev lag luam yeeb nkab seamless, thiab tau pib tsim ib lub tshuab tsim khoom rau dov ntau yam yeeb nkab loj, nruab nrab thiab me. Feem ntau, cov yeeb nkab tooj liab kuj siv cov txheej txheem ntawm billet cross dov thiab perforation, yeeb nkab zeb dov thiab coil kos.

Daim Ntawv Thovthiab kev faib tawm ntawm cov kav hlau tsis muaj seamless

Daim Ntawv Thov: Seamless steel tube yog ib hom hlau seem kev lag luam, muaj txoj haujlwm tseem ceeb heev hauv lub tebchaws kev lag luam, siv dav hauv roj av, kev lag luam tshuaj lom neeg, boiler, chaw tsim hluav taws xob, nkoj, kev tsim khoom siv, tsheb, aviation, aerospace, zog, geology, kev tsim kho thiab tub rog.

Kev faib tawm:

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

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

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

(4) Raws li hom kev tsim khoom: kub dov (extrusion, sab saum toj, nthuav dav) yeeb nkab, txias dov (rub) yeeb nkab

(5) Raws li kev siv: boiler yeeb nkab, roj qhov dej yeeb nkab, pipeline yeeb nkab, structural yeeb nkab, chiv yeeb nkab.

Cov txheej txheem tsim cov raj hlau tsis muaj seamless

Cov txheej txheem tseem ceeb ntawm cov yeeb nkab hlau kub dov seamless (txheej txheem tshuaj xyuas tseem ceeb):

Kev npaj thiab kev tshuaj xyuas cov yeeb nkab billet → cua sov ntawm cov yeeb nkab billet → perforating → dov yeeb nkab → rov ua kom sov ntawm cov yeeb nkab khoob → kho (txo) txoj kab uas hla → kho cua sov → ncaj cov yeeb nkab tiav lawm → ua tiav → kev tshuaj xyuas (tsis puas tsuaj, lub cev thiab tshuaj lom neeg, kev tshuaj xyuas chaw nres tsheb) → khaws cia

(2) Txias dov (kos duab) cov yeeb nkab hlau tsis muaj seamless tsim cov txheej txheem

Kev npaj Billet → pickling thiab lubrication → txias dov (kos duab) → kev kho cua sov → ncaj → tiav → kev tshuaj xyuas

Daim ntawv qhia txog cov txheej txheem ntau lawm ntawm cov yeeb nkab hlau kub dov yog raws li nram no: