Thaum ntsib ib qho kev txiav txim uas yuav tsum tau ua, feem ntau yuav tsum tau tos rau lub sij hawm tsim khoom, uas txawv ntawm 3-5 hnub mus rau 30-45 hnub, thiab hnub xa khoom yuav tsum tau lees paub nrog tus neeg siv khoom kom ob tog tuaj yeem ncav cuag kev pom zoo.

Cov txheej txheem ntawm seamless steel kav feem ntau suav nrog cov kauj ruam tseem ceeb hauv qab no:

1. Kev npaj Billet
Cov khoom siv raw ntawm seamless steel kav yog cov hlau puag ncig lossis cov khoom siv, feem ntau yog cov pa roj carbon zoo lossis cov hlau tsis tshua muaj hlau. Lub billet yog ntxuav, nws saum npoo yog kuaj xyuas qhov tsis xws luag, thiab txiav rau hauv qhov ntev ntev.

2. Cua sov
Lub billet raug xa mus rau lub qhov cub cua sov rau cua sov, feem ntau ntawm cov cua kub ntawm txog 1200 ℃. Cov cua sov sib xws yuav tsum tau ua kom ntseeg tau thaum lub sijhawm cua sov kom cov txheej txheem perforation tom ntej tuaj yeem ua tau zoo.

3. Perforation
Lub rhuab billet yog perforated los ntawm ib tug perforator los ua ib tug hollow ntxhib raj. Txoj kev siv perforation feem ntau yog "oblique dov perforation", uas siv ob lub voj voog oblique los thawb lub billet rau pem hauv ntej thaum tig nws, kom lub hauv paus yog hollow.

4. Dov (stretching)
Lub perforated ntxhib yeeb nkab yog ncab thiab loj los ntawm ntau yam khoom siv dov. Feem ntau muaj ob txoj hauv kev:

Nruam dov txoj kev: Siv ib tug multi-pass dov zeb rau nruam dov kom maj mam txuas cov yeeb nkab ntxhib thiab txo cov phab ntsa thickness.

Pipe jacking method: Siv lub mandrel los pab hauv kev ncab thiab dov los tswj lub puab thiab sab nraud ntawm cov yeeb nkab steel.

5. Qhov loj me thiab txo qis
Txhawm rau kom ua tiav qhov yuav tsum tau muaj qhov loj me, cov yeeb nkab ntxhib yog ua tiav hauv lub tshuab sizing lossis lub tshuab txo. Los ntawm kev nruam dov thiab ncab, lub taub sab nraud thiab phab ntsa tuab ntawm cov yeeb nkab yog kho.

6. Kev kho cua sov
Txhawm rau txhim kho cov khoom siv hluav taws xob ntawm cov yeeb nkab steel thiab tshem tawm cov kev ntxhov siab sab hauv, cov txheej txheem tsim khoom feem ntau suav nrog kev kho cua sov xws li normalizing, tempering, quenching lossis annealing. Cov kauj ruam no tuaj yeem txhim kho qhov toughness thiab durability ntawm cov yeeb nkab steel.

7. Ncaj thiab txiav
Cov yeeb nkab steel tom qab kev kho cua sov tuaj yeem khoov tau thiab yuav tsum tau ncaj nraim los ntawm lub tshuab ncaj. Tom qab straightening, cov yeeb nkab steel raug txiav mus rau qhov ntev uas tus neeg siv khoom xav tau.

8. Kev tshuaj xyuas
Seamless steel kav yuav tsum tau soj ntsuam nruj, uas feem ntau suav nrog cov hauv qab no:

Kev tshuaj xyuas qhov tshwm sim: Tshawb xyuas seb puas muaj cov kab nrib pleb, qhov tsis xws luag, thiab lwm yam ntawm cov yeeb nkab steel.
Dimension soj ntsuam: Ntsuas seb lub cheeb, phab ntsa thickness thiab ntev ntawm cov yeeb nkab steel raws li qhov yuav tsum tau ua.
Kev tshuaj xyuas lub cev: xws li tensile test, impact test, hardness test, etc.
Kev kuaj tsis muaj kev puas tsuaj: Siv ultrasound lossis X-ray los kuaj seb puas muaj cov kab nrib pleb lossis qhov hws hauv.
9. Ntim thiab xa khoom
Tom qab dhau qhov kev tshuaj ntsuam xyuas, cov yeeb nkab steel yog kho nrog kev tiv thaiv corrosion thiab kev tiv thaiv xeb raws li xav tau, thiab ntim thiab xa tawm.

Los ntawm cov kauj ruam saum toj no, cov kav dej seamless steel tsim tau dav siv hauv cov roj, nkev, tshuaj lom neeg, boiler, tsheb, aerospace thiab lwm yam kev lag luam, thiab tau txais kev lees paub dav dav rau lawv lub zog siab, corrosion resistance thiab zoo mechanical zog.