Tom qab kub dov seamless steel raj, cov nplej refinement ntawm hlau, lub ingot rhuav tshem cov qauv cam khwb cia, tshem tawm cov tsis xws luag thiab microstructure ntawm lub resulting ntom PIPE, txhim kho txhua yam khoom. Huab cua npuas tam sim no ua ntej cov yeeb nkab steel, tawg thiab xoob, tom qab kub dov ntawm qhov kub thiab txias yuav raug welded ua ke.

Txawm hais tias muaj ntau qhov zoo ntawm cov yeeb nkab kub-kuav los tiag seamless steel yeeb nkab, tab sis nws qhov tsis txaus yuav tsum yog qhov tseeb, tom qab cov hlau kub-kuav los tiag, cov hlau tsis-hlau inclusions hauv steel sab hauv yog nias rau hauv nyias slices, stratification. Txheej nyob rau hauv lub thickness kev taw qhia ntawm cov hlau nyob rau hauv nro kev ua tau zoo deteriorated ho, muaj interlayer tsim kua muag weld shrinkage.

Tau mus rau kub-dov hlau, yuav tsum muaj cov cuab yeej siv siab heev, yog tias thev naus laus zis tsis dhau, cov hlau tsis sib xws ntawm kev ntxhov siab tshwm sim los ntawm kev txias thaum lub sij hawm kub dov. Kev ntxhov siab nyob rau hauv qhov tsis muaj zog sab nraud yog sib npaug sab hauv, tab sis nyob rau hauv cov ntaub ntawv ntawm steel sab nraud quab yuam nyob rau hauv raug cuam tshuam rau ib co degree, piv txwv li, yuav muaj ib co kev cuam tshuam nyob rau hauv cov nqe lus ntawm deformation, stability, anti- nkees.

Thaum cov hlau tom qab kub dov, ntug dav thiab thickness tswj tsis zoo nyob rau hauv no hais txog vim thermal expansion thiab contraction txoj cai, pib ntawm kub dov steel, ntev, thickness yog tus qauv, tab sis thaum kawg yuav muaj ib co yuam kev thaum lub sij hawm. txias, rau ntug dav dav steel thickness thicker ces qhov tsis zoo sib txawv yuav pom tseeb dua.