1. Dab tsi yog seamless steel yeeb nkab, thiab nws txawv ntawm welded steel yeeb nkab li cas?Seamless steel yeeb nkab yog cov khoom siv hlau cylindrical uas tsis muaj vuam seams, tsim los ntawm kev tho cov khoom steel hlau thiab ces dov los yog kos rau hauv lub raj hollow. Tsis zoo li welded steel kav, uas yog tsim los ntawm vuam steel daim hlau los yog ib daim hlab rau hauv ib tug tubular zoo, seamless kav muaj ib tug niaj hnub qauv nyob rau hauv tag nrho cov phab ntsa thickness. Qhov sib txawv no ua rau cov kav dej seamless muaj zog dua, kev ua haujlwm siab dua, thiab kev tiv thaiv corrosion zoo dua, ua rau lawv haum rau siab - siab, siab - kub, thiab hnyav ua hauj lwm qhov chaw uas cov kav dej welded tej zaum yuav ua rau cov xau los yog tsis ua hauj lwm ntawm qhov vuam seam.
2. Dab tsi yog cov khoom siv tseem ceeb hauv kev tsim cov kav dej seamless?Lub ntsiab raw khoom rau seamless steel kav yog siab - zoo carbon steel los yog alloy steel billets. Cov pa roj carbon steel feem ntau suav nrog 10 #, 20 #, thiab 45 # steel, uas tau siv dav rau dav dav - lub hom phiaj seamless kav. Rau alloy seamless kav, alloying ntsiab xws li chromium (Cr), molybdenum (Mo), npib tsib xee (Ni), thiab vanadium (V) yog ntxiv rau cov hlau billet los txhim kho cov yeeb nkab cov cuab yeej cuab tam, corrosion kuj, thiab siab -kub kev ua tau zoo. Tsis tas li ntawd, cov billets yuav tsum ua tau raws li cov qauv zoo, tsis muaj qhov tsis xws luag xws li cov kab nrib pleb, suav nrog, lossis tsis sib xws, los xyuas kom meej qhov kawg seamless yeeb nkab zoo.
3. Dab tsi yog cov txheej txheem ntau lawm ntawm seamless steel kav?Cov txheej txheem tseem ceeb ntawm seamless steel kav muaj xws li kub dov thiab txias txias (los yog txias dov). Cov txheej txheem kub dov muaj xws li cua sov cov hlau nplaum rau qhov kub siab (feem ntau yog 1100-1250 degree), tho nws mus rau hauv lub plhaub hollow siv lub piercer, ces dov nws mus rau qhov xav tau loj thiab phab ntsa thickness siv lub mandrel zeb los yog nruam dov zeb. Kev kos duab txias / txias dov yog ua nyob rau hauv chav tsev kub, qhov kub - dov seamless yeeb nkab yog kos los ntawm kev tuag (los yog dov) kom ua tiav qhov siab dua qhov tseeb, smoother nto tiav, thiab cov khoom zoo dua qub. Lwm cov txheej txheem suav nrog kev nthuav dav kub (rau cov kav dej loj) thiab kev kho cua sov (kom kho cov yeeb nkab microstructure thiab kev ua tau zoo).
4. Qib "20# seamless steel yeeb nkab" txhais li cas, thiab nws cov kev siv tseem ceeb yog dab tsi?Qib "20#" yog hais txog cov pa roj carbon steel seamless yeeb nkab, qhov "20" sawv cev rau qhov nruab nrab cov ntsiab lus ntawm cov hlau (kwv yees li 0.20% los ntawm qhov hnyav). 20# seamless steel yeeb nkab muaj plasticity zoo, toughness, thiab weldability, nrog lub zog tensile ntawm 410- thiab ntau tshaj li 50MP 245 MPa rau. Nws cov ntawv thov tseem ceeb suav nrog kev thauj cov dej siab tsawg (xws li dej, roj, thiab roj) hauv kev lag luam thiab pej xeem, tsim cov khoom siv tshuab (xws li cov ncej, lub tes tsho, thiab cov khoom sib txuas), thiab ua cov khoom siv rau cov kav dej nruab nrab hauv cov khoom siv dav dav.
5. Dab tsi yog qhov txawv ntawm kub- dov thiab txias - kos seamless steel kav?Kub-rolled seamless steel kav yog tsim nyob rau hauv high kub, ua rau ib tug kuj ntxhib nto (surface roughness Ra ≈ 12.5-25μm), me ntsis qhov seem qhov tseeb, tab sis zoo toughness thiab ductility. Lawv tsim nyog rau qhov loj - txoj kab uas hla, tuab- cov kav dej thiab cov ntawv thov uas qhov ntsuas qhov ntsuas tsis nruj heev. Txias-cov kav hlau tsis muaj seamless yog tsim nyob rau hauv chav tsev kub, nrog ib tug du nto (Ra ≈ 0.8-6.3μm), qhov siab qhov tseeb (siab ntev mus txog ± 0.02mm), thiab siab zog tensile vim ua hauj lwm hardening. Lawv tau dav siv nyob rau hauv precision machinery, automotive qhov chaw, thiab high-precision fluid thauj pipelines.
