1. Yuav ua li cas los txheeb xyuas cov kav dej seamless?
Tsis muaj Weld Seam: Cov cim npe nrov tshaj plaws yog qhov tsis pom zoo ntawm kev pom ntev weld Seam khiav raws qhov ntev ntawm cov yeeb nkab. Welded kav, los ntawm kev sib piv, muaj lub ntsej muag sib txawv (xws li tsa, tiaj tus, lossis me ntsis indented) qhov twg cov npoo ntawm daim ntawv hlau lossis sawb tau fused ua ke.
Uniform nto: Seamless kav feem ntau muaj smoother, ntau dua sab nraud thiab sab hauv, raws li lawv tau tsim cov vuam (piv txwv li, tsis muaj kab fusion, tsis xwm yeem cov kab fusion).
Khiav tus ntiv tes raws cov yeeb nkab lub sijhawm yuav tsis pom ib qho caj dab lossis indentation los ntawm kev tsim tawm weld, uas yog ib txwm muaj hauv welded kav dej.
Txiav ib feem me me ntawm cov yeeb nkab qhia txog cov khaub ncaws zoo nkauj, uas tsis muaj neeg nyob sab nrauv. Welded kav dej yuav qhia tau pom tias pom pom weld hlaws lossis kev sib txawv me me hauv cov qauv hlau ntawm cov leeg ua raws li kev magnification.
Ntau cov kav dej seamel tsis muaj ntawv lo nrog cov nyiaj muas los yog engravings qhia lawv hom (piv txwv li, "seamless thiab ablu"). Cov qauv xws li ASTM (piv txwv li, ASTM A106 rau cov hlau seamless kav) lossis din ntau ntau cov khoom lag luam rau cov khoom lag luam.
Kev Kuaj Ultrasonic (ut): Siv lub suab nthwv dej los kuaj pom hauv sab hauv flaws; Seamless kav yuav qhia tsis muaj kev txwv tsis pub los ntawm Weld.
RadioGraphic Xeem (RT): X-Rays lossis Gamma Rays qhia cov leeg pom zais cia, uas tsis tuaj nyob rau hauv cov kav dej seamless.
2. Cov qib ntawm cov kav dej seamless?
Carbon Steel Seamless kav dej
ASTM A106:Qib A, B, thiab C: sib txawv los ntawm Tensile Lub Zog (Qib A: 485 mpax; Qib C: 485 MPA Min). Siv rau kev pab kub-kub hauv cov nroj tsuag hluav taws xob thiab kev ua haujlwm ntxiv.
ASTM A53:Qeb A thiab B: Zoo ib yam li A106 tab sis nrog cov ntsiab lus roj carbon. Siv hauv dej, roj av, thiab chav dej.
API 5L:Qib B, X42, x52, x60, thiab lwm yam.: Tsim rau cov roj thiab roj kis. "X" qib qhia tsawg kawg tsis muaj tsawg los muaj zog (piv txwv li x {{{{}, 000 pini paib zog).
Alloy Steel Seamless kav
ASTM A335:Qib P5: chromium-molybdenum (cr-mo) alloy (5% mo) rau qhov kev siv kub siab ntxiv (piv txwv li, boilers, turbines).
Qeb P91: 9% CR, 1% MO, nrog rau Vanadium thiab Niobium ntxiv, zoo tagnrho rau cov roj hluav taws xob ultra-supercritical vim tias zoo creep kuj.
ASTM A333:Qeb 6, 3, thiab lwm yam.: Cov roj carbon tsawg tsawg (piv txwv li cov qib qis (piv txwv li cov qib qis
Stainless Hlau Seamless kav
Austenitic Stainless hlau(tsis muaj kev sib nqus, kev sib nqus siab): ASTM A312:304: 18% cr, 8% ni; Ntau yam, tiv taus cov kua qaub me me thiab oxidation.
316: 16% CR, 10% NI, 2-3% MO; Txhim kho kom tiv thaiv cov chloride corrosion (piv txwv li, seawater, brines).
321: 18% cr, 8% ni, ruaj khov nrog titanium; Tsis kam cuam tshuam corroosular tom qab vuam.
Cov hlau ferritic stainless(Sib nqus, cov chromium siab):ASTM A312 Qib 430: 17% CR; raug nqi-siv tau, siv nyob rau hauv cov chaw tsawg-corrosion zoo li tso lub tshuab txav.
Duplex stainless hlau(Austenitic-ferritic sib tov, siab lub zog):ASTM A790 Qib Qib S31803: 22% CR, 5% NI, 3% MO; Ua ke lub zog thiab corrosion tiv taus roj thiab roj oged cov khoom siv.
Nickel Alloy Seamless Kav
Inconel 600: Nickel-chromium alloy (76% ni, 16% cr) resistant rau oxidation thiab high-kub nkag.
Hastelloy C276: Nickel-Molybdenum-chromium alloy (57% ni, 16% mo) nrog cov accomple (piv txwv li sulfuric, hydrochloric).
Monel 400: Nickel-Tooj Liab Alloy (67% ni, 30% Cu) rau dej hiav txwv thiab cov ntawv thov hydrofluoric acid.
Lwm qib tshwj xeeb
Titanium seamless kav dej: Qib 2 (Cov lag luam ntshiab titanium) thiab qib 5 (ti-6al-4V alloy) rau kev lag luam Aerospace, kho mob, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj kev kho mob siab, thiab muaj mob corrosion.
Aluminium Seamless kav: ASTM B210 Qib 1100 (ntshiab aluminium) thiab 6061 (txhuas-magnesium-silicon) rau lub teeb, cov kev siv qis xeb.
