Quality defects in seamless steel tubes such as internal folds, delamination, inclusions, through-cracks, porosity, severe wall thickness unevenness, bulges, and deep scratches (>30μm) kho tsis tau.
Cov kev tsis zoo no yog kev puas tsuaj sab hauv lossis kev ua haujlwm tsis zoo uas cuam tshuam ncaj qha rau lub siab -cov kabmob muaj peev xwm thiab kev nyab xeeb ntawm lub raj steel, thiab tsis tuaj yeem raug tshem tawm los ntawm kev kho saum npoo. Piv txwv li:
1. Internal folds thiab delamination: Keeb kwm los ntawm kev ntxhov siab concentration thaum lub sij hawm perforation los yog inclusions nyob rau hauv lub raj dawb paug, ua rau phab ntsa delamination, uas yog heev raug rau propagation thiab rupture nyob rau hauv siab.
2. Inclusions thiab porosity: cuam tshuam cov khoom txuas ntxiv, tsim cov ntsiab lus kev ntxhov siab, yooj yim ua rau tawg tawg.
3. Los ntawm - tawg: Nkag mus rau lub raj phab ntsa; txawm tias kho los ntawm kev vuam, nws yuav qhia qhov kev ntxhov siab tshiab, thiab kev kho thiab siv yog txwv nruj heev.
4. Cov phab ntsa tuab tuab tsis sib xws thiab bulges: Ua los ntawm kev tswj tsis tau dov, kho tsis tau, thiab ua rau muaj kev phom sij tawg.
5. Deep scratches (>30μm): Cov no yog qhov ua rau muaj kev qaug zog tawg nyob rau hauv cov khoom sib hloov, thiab suav tias yog siab - kev pheej hmoo tsis xws luag, tshwj xeeb tshaj yog nyob rau hauv siab - cov tshuab siab.
⚠️ Raws li GB/T 8163-2023, seamless steel kav siv los thauj cov nplaim hluav taws xob lossis cov tshuaj lom tsis raug tso cai rau kev kho txhua yam kev puas tsuaj. Yog tias pom cov teeb meem saum toj no, tag nrho cov yeeb nkab yuav tsum tau muab pov tseg kom ntseeg tau tias qhov project muaj kev nyab xeeb.
