Sebetsa 904L 1.4539
Kopo
Semela sa lik'hemik'hale, mochini o hloekisang oli, limela tsa petrochemical, litanka tse soeufatsang bakeng sa indasteri ea pampiri, limela tsa khase e tukang ea desulfurisation, ho sebelisoa metsing a leoatle, sulfuric le phosphoric acid.Ka lebaka la boemo bo tlaase ba C, ho hanyetsa ho bola ha intergranular ho boetse ho tiisetsoa ka boemo bo cheselitsoeng.
Mefuta ea Lik'hemik'hale
| Element | % E teng (ka sebopeho sa sehlahisoa) |
| Khabone (C) | 0.02 |
| Silicon (Si) | 0.70 |
| Manganese (Mn) | 2.00 |
| Phosphorous (P) | 0.03 |
| Sebabole (S) | 0.01 |
| Chromium (Cr) | 19.00 - 21.00 |
| Nickel (Ni) | 24.00 - 26.00 |
| Nitrojene (N) | 0.15 |
| Molybdenum (Mo) | 4.00 - 5.00 |
| Koporo (Cu) | 1.20 - 2.00 |
| Tshipi (Fe) | Ho leka-lekanya |
Thepa ea mechine
Mechanical properties (mocheso oa kamore ka boemo ba annealed)
| Foromo ea Sehlahisoa | |||||||
| C | H | P | L | L | TW/TS | ||
| Botenya (mm) Max. | 8.0 | 13.5 | 75 | 160 | 2502) | 60 | |
| Kotulo Matla | Rp0.2 N/mm2 | 2403) | 2203) | 2203) | 2304) | 2305) | 2306) |
| Rp1.0 N/mm2 | 2703) | 2603) | 2603) | 2603) | 2603) | 2503) | |
| Matla a tšepe | Rm N/mm2 | 530 - 7303) | 530 - 7303) | 520 - 7203) | 530 - 7304) | 530 - 7305) | 520 - 7206) |
| Elongation min.ka % | Jmin (Longitudinal) | - | 100 | 100 | 100 | - | 120 |
| Jmin (Papang) | - | 60 | 60 | - | 60 | 90 | |
Lintlha tsa litšupiso
| Boima ba 20°C kg/m3 | 8.0 | |
| Thermal Conductivity W/m K ka | 20°C | 12 |
| Modulus of Elasticity kN/mm2 ho | 20°C | 195 |
| 200°C | 182 | |
| 400°C | 166 | |
| 500°C | 158 | |
| Mocheso o Khethehileng oa 20°CJ/kg K | 450 | |
| Ho hanyetsa Motlakase ho 20°C Ω mm2/m | 1.0 | |
Tshebetso / Welding
Mekhoa e tloaelehileng ea welding bakeng sa sehlopha sena sa tšepe ke:
- TIG-Welding
- MAG-Welding Mohala o tiileng
- Arc Welding (E)
- Laser Bean Welding
- Arc Welding e ka tlas'a metsi (SAW)
Ha u khetha tšepe ea ho tlatsa, khatello ea kutu e tlameha ho nkoa hape.Tšebeliso ea tšepe e phahameng ea alloyed e ka hlokahala ka lebaka la sebopeho sa tšepe ea weld.Ho futhumatsa ha hoa hlokahala bakeng sa tšepe ena.Phekolo ea mocheso ka mor'a ho cheselletsa hangata ha e tloaelehe.Litšepe tsa Austenitic li na le 30% feela ea conductivity ea mocheso ea litšepe tse se nang alloyed.Sebaka sa bona sa fusion se tlase ho feta sa tšepe e se nang alloyed, ka hona, litšepe tsa austenitic li tlameha ho ts'oaroa ka mocheso o tlase ho feta litšepe tse se nang alloyed.Ho qoba ho chesa haholo kapa ho chesoa ke lishiti tse tšesaane, ho tlameha ho sebelisoe lebelo le phahameng la welding.Lipoleiti tsa koporo bakeng sa ho hana mocheso ka potlako li sebetsa, athe, ho qoba mapetsong a tšepe ea solder, ha e lumelloe ho hlahisa poleiti ea koporo ea koporo.Tšepe ena e na le coefficient e phahameng haholo ea katoloso ea mocheso joalo ka tšepe e se nang alloyed.Mabapi le conductivity e mpe ea mocheso, ho lokela ho lebelloa ho sotha ho hoholo.Ha tjheseletsa 1.4539 mekgwatshebetso yohle, e sebetsang khahlanong le khopamiso ena (mohlala, morao-mohato tatelano tjheseletsa, tjheseletsa alternately mahlakoreng a fapaneng le habeli V butt tjheseletsa, kabelo ea tjheseletsa tse peli ha likarolo tse ho latela boholo) lokela ho hlomphuoa haholo.Bakeng sa botenya ba sehlahisoa ho feta 12mm, cheselletso ea "double-V butt" e tlameha ho khethoa ho fapana le e 'ngoe ea V butt weld.The angle e kenyelelitsoeng e lokela ho ba 60 ° - 70 °, ha u sebelisa MIG-welding e ka bang 50 ° e lekane.Ho bokella li-weld seams ho lokela ho qojoa.Li-wellds tsa "tack welds" li tlameha ho hokelloa ka sebaka se batlang se le khuts'oane ho tloha ho tse ling (tse khuts'oane haholo ho feta tsena tsa litšepe tse se nang alloyed), e le ho thibela ho senyeha ho matla, ho honyela kapa ho thella ha litšepe.Li-tacks li lokela ho siloa ka mor'a moo kapa bonyane li se na mapetsong a crater.1.4539 mabapi le tšepe ea austenitic weld le ho kenya mocheso o phahameng haholo ho lemalla ho etsa mapetsong a mocheso ho teng.Ho lemalla mapetsong a mocheso ho ka koalloa, haeba tšepe ea weld e na le litaba tse tlase tsa ferrite (delta ferrite).Likahare tsa ferrite ho fihla ho 10% li na le phello e ntle 'me ha li ame ho hanyetsa ha kutu ka kakaretso.The thinnest layer kahohle kamoo ho ka khonehang e tlameha ho ts'oaroa (mokhoa oa stringer bead) hobane lebelo le phahameng la ho pholisa le fokotsa ho lemalla mapetsong a chesang.Pholiso e potlakileng ka ho khetheha e tlameha ho ts'oaroa ha u ntse u cheseletsa, ho qoba ho ba kotsing ea ho bola le ho putlama ha intergranular.1.4539 e loketse haholo bakeng sa welding laser beam (weldability A ho latela DVS bulletin 3203, karolo ea 3).Ka bophara ba li-welding groove tse nyane ho feta 0.3mm ka tatellano botenya ba sehlahisoa sa 0.1mm ts'ebeliso ea litšepe tsa ho tlatsa ha e hlokahale.Ka li-grooves tse kholoanyane ho ka sebelisoa tšepe e tšoanang ea ho tlatsa.Ka ho qoba oxidation ka har'a seam surface laser beam welding ka tjheseletsa ea backhand e sebetsang, mohlala, helium joalo ka khase e inert, seam ea tjheseletsa e hana ho bola joalo ka tšepe ea motheo.Kotsi e chesang e chesang bakeng sa seam ea welding ha e eo, ha u khetha mokhoa o sebetsang.1.4539 ke alos e loketseng ho itšeha ka laser beam fusion ka naetrojene kapa ho seha lelakabe ka oksijene.Mathoko a sehiloeng a na le libaka tse nyane tse anngoeng ke mocheso 'me hangata ha a na mapetso a mirco, ka hona a bōpeha hantle.Ha u ntse u khetha mekhoa e sebetsang, likarolo tse sehiloeng tsa fusion li ka fetoloa ka kotloloho.Haholo-holo, li ka chesetsoa ntle le ho itokisa.Ha o ntse o sebetsa feela lisebelisoa tse sa hloekang joalo ka borashe ba tšepe, likhetho tsa pneumatic joalo-joalo li lumelloa, e le hore u se ke ua beha kotsing ea passivation.Ha ea lokela ho hlokomolohuoa ho tšoaea ka har'a sebaka sa seam sa welding ka liboutu tsa oleaginous kapa mocheso o bonts'ang likrayone.Khanyetso e phahameng ea li-corrosions ea tšepe ena e sa hloekang e thehiloe ho thehoeng ha lera le ts'oanang, le kopaneng le se nang letho holim'a metsi.Mebala ea li-annealing, sekala, masala a slag, tšepe ea tramp, li-spatters le tse joalo li tlameha ho tlosoa, e le hore li se ke tsa senya lera le sa sebetseng.Bakeng sa ho hloekisa bokaholimo, ho ka sebelisoa ho hlatsoa, ho sila, ho kha kapa ho qhomisa (lehlabathe le se nang tšepe la silica kapa likhalase tsa khalase).Bakeng sa ho borashe ho ka sebelisoa feela borashe ba tšepe e sa hloekang.Ho khetha sebaka sa seam se neng se entsoe ka borashe ho etsoa ka ho qoelisoa le ho fafatsa, leha ho le joalo, hangata ho sebelisoa li-pickling kapa litharollo.Ka mor'a ho hlatsoa, ho lokela ho hlatsoa ka hloko ka metsi.
