1. Dab tsi yog qhov cuam tshuam ntawm phab ntsa thickness sib txawv ntawm kev ua haujlwm ntawm seamless steel kav?
Phab ntsa thickness sib txawv (cov phab ntsa tuab tsis sib npaug) yuav muaj kev cuam tshuam loj rau kev ua haujlwm ntawm cov kav dej seamless: ① Siab- cov kabmob muaj peev xwm: Qhov nyias nyias ntawm phab ntsa tuab yog qhov ua rau muaj kev ntxhov siab, uas txo qhov siab tag nrho - cov kabmob muaj peev xwm ntawm cov yeeb nkab thiab tuaj yeem ua rau tawg hauv qhov siab. ② Cov khoom siv kho tshuab: Cov phab ntsa tuab tsis sib xws yuav ua rau tsis sib xws ntawm kev ntxhov siab sab hauv thaum kho cua sov, ua rau cov khoom siv tsis sib xws (xws li lub zog, tawv) ntawm cov yeeb nkab, thiab txo cov kev pab cuam lub neej. ③ Kev ua tau zoo: Thaum cov yeeb nkab yog khoov, welded, lossis ua tiav rau hauv cov khoom, cov phab ntsa tuab tsis sib xws yuav ua rau deformation thiab tawg, cuam tshuam rau kev ua haujlwm zoo. ④ Tus qauv muaj kev txwv nruj ntawm phab ntsa thickness sib txawv (feem ntau ± 10% ntawm nominal phab ntsa thickness) los xyuas kom meej qhov kev ua tau zoo ntawm cov yeeb nkab.
2. Yuav ua li cas xaiv cov qib zoo ntawm seamless steel yeeb nkab rau cov dej ua haujlwm sib txawv?
Kev xaiv ntawm seamless steel yeeb nkab qib raws li cov kua dej ua haujlwm yog nyob ntawm qhov corrosion, kub, thiab siab ntawm cov kua dej: ① Dej (cov dej tshiab, dej hiav txwv): dej tshiab tuaj yeem siv A106 Qib B, API 5L X42; seawater yuav tsum siv corrosion-cov qib resistant xws li 316, 316L. ② Roj thiab roj: API 5L series (X42, X52) rau roj thiab roj kis; 4130, 4340 rau siab - cov khoom siv roj thiab roj siab. ③ Siab-kub kub: A106 Qib B (kub nruab nrab), 12Cr1MoV (siab kub, Tsawg dua lossis sib npaug li 570℃). ④ Corrosive acids thiab alkalis: 316L, 317L rau cov kua qaub (xws li sulfuric acid, hydrochloric acid); 12Cr1MoV rau qaug zog alkalis. ⑤ Khoom noj khoom haus thiab tshuaj: 304, 316L (khoom noj- qib, FDA tau ntawv pov thawj) kom tsis txhob muaj cov kua dej paug.
3. Dab tsi yog qhov txawv ntawm seamless steel kav rau boiler siv thiab zoo tib yam industrial seamless kav?
Seamless steel kav rau boiler siv (xws li A213, 12Cr1MoV) yog txawv los ntawm zoo tib yam industrial seamless kav (xws li A106 Qib B, GB / T 8163) nyob rau hauv cov nram qab no yam: ① Kev ua tau zoo: Boiler kav yuav tsum siab dua -kub creep tsis kam, oxidation tsis kam, thiab 6, vim hais tias lawv ua hauj lwm kub siab, oxidation tsis kam, thiab 6. 570℃) thiab siab -siab (txog 10 MPa) ib puag ncig ntev. ② Tshuaj lom neeg muaj pes tsawg leeg: Boiler kav muaj ntau cov ntsiab lus alloying (xws li chromium, molybdenum, vanadium) los txhim kho siab - qhov kub thiab txias, thaum cov kav dej zoo tib yam tsis muaj lossis ob peb lub ntsiab lus alloying. ③ Kev soj ntsuam yuav tsum tau ua: cov kav dej boiler yuav tsum tau soj ntsuam nruj dua (xws li kev kuaj creep, kev sim qaug zog) kom ntseeg tau ntev - kev pabcuam nyab xeeb, thaum cov kav dej zoo tib yam tsuas yog yuav tsum tau ua kom tau raws li cov cuab yeej cuab tam thiab qhov ntev. ④ Daim ntawv thov: Boiler kav yog siv rau boiler dej phab ntsa, superheaters, thiab reheaters, thaum zoo tib yam cov kav dej yog siv rau cov dej sib kis.
4. Cov kav hlau tsis muaj seamless tuaj yeem rov ua dua tshiab, thiab cov txheej txheem rov ua dua yog dab tsi?
Yog lawm, seamless steel kav tuaj yeem rov ua dua tshiab, thiab cov txheej txheem rov ua dua yog qhov tseem ceeb: ① Mechanical recycling: Soj cov khib nyiab seamless steel kav los ntawm qib (carbon steel, alloy steel, stainless hlau), ces crush, txiav, thiab yaj lawv mus rau hauv steel billets, uas yuav rov qab siv tau los tsim tshiab seamless steel kav los yog lwm yam steel khoom. ② Kev siv tshuaj lom neeg: Rau cov kav hlau stainless uas muaj cov ntsiab lus alloy siab, cais cov ntsiab lus hlau (xws li chromium, nickel, molybdenum) los ntawm cov txheej txheem tshuaj, uas tuaj yeem rov qab siv dua hauv kev tsim cov hlau tsis huv tshiab. ③ Rov siv dua: Rau cov kav dej khib nyiab seamless steel uas tsis muaj kev puas tsuaj thiab kev ua haujlwm zoo, lawv tuaj yeem kho tau (xws li kev kho saum npoo, kev kho cua sov) thiab rov siv dua nyob rau hauv qis - siab, qis -xav tau qhov xwm txheej (xws li cov kav dej ib ntus, cov khoom siv pabcuam). Recycling seamless steel kav yuav txuag tau cov peev txheej, txo cov pa phem ib puag ncig, thiab muaj txiaj ntsig zoo nyiaj txiag thiab ib puag ncig.
5. Dab tsi yog qhov teeb meem ntawm seamless steel kav, thiab yuav ua li cas kom tsis txhob muaj lawv?
Feem ntau qhov tsis xws luag ntawm cov kav dej seamless steel thiab lawv txoj kev zam yog: ① Kev tawg: Ua los ntawm cov cua kub tsis sib xws ntawm cov khoom siv hluav taws xob, siab dov ntau dhau, lossis kev kho cua sov tsis raug. Kev zam: Tswj cov cua kub kub thiab ceev ntawm billets, kho cov txheej txheem dov, thiab nruj me ntsis siv cov txheej txheem kev kho cua sov. ② Cov khoom suav nrog: Ua los ntawm cov khoom siv tsis huv los yog cov pa phem thaum tsim khoom. Kev zam: Siv siab -purity billets, ntxiv dag zog rau purification ntawm molten steel, thiab nruj me ntsis tswj qhov chaw tsim khoom. ③ Pitting corrosion: Ua los ntawm chloride ion corrosion los yog deg tsis xws luag. Kev zam: Xaiv cov tshuaj tiv thaiv corrosion- cov qib tiv thaiv, ua qhov chaw tiv thaiv- kev tiv thaiv corrosion, thiab tsis txhob siv cov yeeb nkab hauv qhov chaw siab - chloride. ④ Phab ntsa thickness sib txawv: tshwm sim los ntawm qhov tsis sib xws ntawm tho los yog dov. Kev zam: Kho cov khoom tho thiab dov, thiab nruj me ntsis tshuaj xyuas qhov ntsuas qhov tseeb thaum lub sijhawm tsim khoom. ⑤ Wrinkles: Ua los ntawm kev rub tawm ntau dhau lossis kev ntxhov siab tsis sib xws thaum kos duab txias. Kev zam: Tswj cov duab nrawm thiab nro, thiab ua qhov nruab nrab annealing kom tshem tawm kev ua haujlwm nyuaj.
