Kub Rolling Steel Pipe Supplier-GNEE
- Qhov zoo ntawm kub dov steel yeeb nkab:
Nws tuaj yeem rhuav tshem lub koom haum casting ntawm lub ingot, ua kom cov nplej ntawm cov hlau, thiab tshem tawm qhov tsis xws luag ntawm microstructure, yog li ua rau lub koom haum steel ntom ntom, cov khoom siv kho tshuab zoo tuaj. Qhov kev txhim kho no feem ntau yog cuam tshuam txog kev taw qhia raws li qhov kev taw qhia dov, kom cov hlau tsis muaj isotropic lub cev mus rau qee yam; casting qhov tsim ntawm npuas, tawg thiab sparsity, tab sis kuj nyob rau hauv lub luag hauj lwm ntawm kub thiab siab yog welded ua ke.
- Disadvantages ntawm kub dov steel yeeb nkab
1. Tom qab kub dov, cov hlau sab hauv uas tsis yog xim hlau inclusions (tsuas yog sulfides thiab oxides, thiab silicates) yog nias rau hauv cov ntawv nyias, qhov tshwm sim ntawm delamination (interlayer). Delamination ho deteriorates lub tensile zog ntawm cov hlau nyob rau hauv thickness kev taw qhia, thiab muaj kev pheej hmoo ntawm interlayer tearing thaum weld shrinkage. Weld shrinkage induced hauv zos strain feem ntau mus txog ob peb zaug ntawm cov ntsiab lus tawm los, ntau loj dua li cov khoom thauj-induced strain;
2. Cov cua txias tsis sib xws uas tshwm sim los ntawm cov kev ntxhov siab seem. Residual stress yog nyob rau hauv tsis muaj sab nraud quab yuam nyob rau hauv tus kheej-equilibrium kev nyuaj siab, ntau yam cross-sectional kub-dov hlau muaj xws li residual kev nyuaj siab, feem ntau qhov loj qhov cross-section loj ntawm cov hlau, ntau dua qhov residual stress. Txawm hais tias qhov seem ntawm kev ntxhov siab yog qhov sib npaug ntawm tus kheej, tab sis kev ua tau zoo ntawm cov khoom siv hlau nyob rau sab nraud los yog muaj qee yam cuam tshuam. Xws li deformation, stability, qaug zog, thiab lwm yam yuav muaj kev phiv.
3. kub dov steel khoom, rau lub thickness thiab dav ntawm no nam ntawm kev tswj tsis zoo. Peb paub txog cov thermal expansion thiab contraction, vim qhov pib ntawm qhov kub dov tawm txawm tias qhov ntev thiab tuab yog raws li tus qauv, thiab thaum kawg tom qab txias yuav muaj qee qhov tsis zoo sib txawv, qhov tsis zoo no txawv ntawm qhov dav dav. ntawm ntug, qhov thicker lub thicker qhov kev ua tau zoo dua. Yog li ntawd, rau cov hlau loj, rau steel ntug dav, thickness, ntev, lub kaum sab xis, thiab ntug ntawm txoj kab tsis tuaj yeem xav tau ntau yam.
