Thaum seamless steel hlab yog txias, kub dov tube tsis xws luag xws li cov kab nrib pleb los yog lub xub ntiag ntawm high-precision kos duab roj tank yog tsim tom qab lub pob txha tshwm sim nyob rau hauv lub chav kawm, yuav luag tsis muaj yas deformation tshwm sim, feem ntau yog brittle puas. Cov pob txha tawg yog tshwm sim los ntawm ntau yam laj thawj. Xws li: cov qoob loo ciam teb, tsis hais qhov twg muaj zog tshaj lub zog ntawm matrix lossis tsis muaj zog, yog txhua yam ua rau tawg; kev sib cais ntawm cov qoob loo ciam teb suav nrog yog vim li cas tawg; Tsis tas li ntawd, txawm tias nyob deb npaum li qhov kev txwv tsis pub dhau ntawm tus ntoo khaub lig nyob rau hauv cov khoom sib txawv, tuaj yeem ua rau qaug zog tawg.

Feem ntau, cov khoom siv ntawm hydraulic (pneumatic) cov khoom siv hauv kev tsim, cov khoom siv tau suav tias yog homogeneous, txuas ntxiv, isotropic, raws li cov qauv kev tshuaj xyuas no suav tias yog kev tsim qauv zoo, qee zaum kev sib tsoo yuav tshwm sim. Txoj kev tshawb nrhiav pom tias cov txheej txheem tsis tshua muaj kev ntxhov siab nkig tawg tshwm sim hauv cov khoom siv hlau muaj zog, lub koom haum cov khoom nyob deb ntawm homogeneous, isotropic. Cov koom haum muaj cov kab nrib pleb, yuav muaj kev suav nrog, porosity thiab lwm yam tsis xws luag uas tuaj yeem pom tau tias yog cov khoom siv microcracks. Tsis tas li ntawd, cov pob txha tawg thiab kuj yog cov tswv cuab ntawm qhov ntsuas kub. Thaum tib neeg los ntawm kev tshawb fawb pom tias thaum qhov kub thiab txias poob qis dua qhov kub, cov khoom yuav hloov mus rau hauv lub xeev nkig, qhov cuam tshuam absorbed zog poob, ib qho tshwm sim hu ua txias brittleness, yog li tus tsim tab sis kuj raws li cov neeg ua hauj lwm kub xaiv. nrog rau qhov haum txias-nkig hloov kub ntawm cov khoom.