1. Dab tsi yog seamless mechanical tubing, thiab nws txawv li cas ntawm welded tubing?
A:Seamless mechanical tubing yog lub hollow steel bar tsim tsis muaj welded seam. Nws yog tsim los ntawm kev tho ib qho khoom siv hlau. Qhov sib txawv tseem ceeb ntawm welded tubing (tsim los ntawm cov ntawv dov thiab welded raws nws qhov ntev) yog qhov tsis muaj cua sov- thaj tsam cuam tshuam (HAZ) ntawm lub vuam seam. Qhov no ua rau seamless tubing superior zog, siab ncaj ncees, thiab uniformity, tshwj xeeb tshaj yog nyob rau hauv cov kev siv tseem ceeb.
2. Dab tsi yog cov qib carbon steel feem ntau siv rau seamless mechanical tubing?
A:Cov qhab nia feem ntau yogASTM A513 Cov Lus Qhia Tshwj Xeeb(rau hluav taws xob-tsis kam-welded thiab qee qhov seamless),ASTM A519 Cov Lus Qhia Tshwj Xeeb(tshwj xeeb rau seamless thiab welded carbon thiab alloy steel mechanical tubing), thiabSAE J412(uas txhais cov tshuaj muaj pes tsawg leeg). Cov qib uas muaj xws li1020, 1026, 1045, thiab 4130. 1020/1026 yog qis- carbon rau lub hom phiaj dav dav, 1045 yog nruab nrab -carbon rau lub zog siab dua, thiab 4130 yog chromium-molybdenum alloy steel rau siab - siv zog.
3. Vim li cas cov txheej txheem tsim khoom "seamless" tseem ceeb heev rau kev siv siab -kev nyuaj siab?
A:Cov txheej txheem seamless ua kom muaj qhov nruam, homogeneous grain qauv uas ua raws li cov duab concentric ntawm lub raj. Qhov no tshem tawm qhov muaj peev xwm rau seam- cuam tshuam txog kev ua tsis tiav, suav nrog, lossis qhov tsis muaj zog uas tuaj yeem tshwm sim hauv cov kab txuas ntawm welded tubing. Nws muab cov khoom zoo ib yam nyob ib ncig ntawm tag nrho cov ncig, uas yog qhov tseem ceeb nyob rau hauv siab cyclic lossis torsional loads.
4. Dab tsi yog cov cuab yeej tseem ceeb uas yuav tsum tau xav txog thaum xaiv cov raj seamless?
A:Cov khoom tseem ceeb yog:
Yield zog:Qhov kev ntxhov siab uas cov khoom pib deform plastically.
Tensile zog:Qhov siab tshaj plaws ntawm cov khoom siv tuaj yeem tiv taus thaum raug ncab.
Elongation:Kev ntsuas ntawm ductility (ntau npaum li cas nws tuaj yeem ncab ua ntej tawg).
Hardness:Resistance rau indentation los yog puas.
Cov txiaj ntsig xav tau yog nyob ntawm daim ntawv thov kev thauj khoom, kev ntxhov siab, thiab kev cuam tshuam.
5. Kev kho cua sov puas cuam tshuam rau cov khoom ntawm seamless carbon steel tubing?
A:Kev kho cua sov (xws li annealing, normalizing, lossis quenching thiab tempering) tuaj yeem hloov kho lub raj lub microstructure kom ua tiav cov khoom xav tau.
Annealingsoftens cov hlau, txhim kho ductility, thiab txo cov kev ntxhov siab sab hauv.
normalizingrefines lub grain loj rau ntau uniform zog thiab toughness.
Quenching & Temperingyog siv rau cov hlau alloy xws li 4130 kom ua tiav lub zog thiab tawv heev.
