Insimbi Engagqwali 904L 1.4539
Isicelo
Imboni yamakhemikhali, indawo yokuhluza uwoyela, izitshalo ze-petrochemical, amathangi amhlophe embonini yephepha, izitshalo zokususa igesi evuthayo, ukusetshenziswa emanzini olwandle, i-sulfuric ne-phosphoric acid. Ngenxa yokuqukethwe okuphansi kwe-C, ukumelana nokugqwala kwe-intergranular nakho kuqinisekisiwe esimweni esishiselwe.
Ukwakhiwa Kwamakhemikhali
| Isici | % Okwamanje (ngefomu lomkhiqizo) |
| Ikhabhoni (C) | 0.02 |
| I-silicon (Si) | 0.70 |
| I-Manganese (Mn) | 2.00 |
| I-Phosphorous (P) | 0.03 |
| Isibabule (S) | 0.01 |
| I-Chromium (Cr) | 19.00 - 21.00 |
| I-Nickel (Ni) | 24.00 - 26.00 |
| I-nitrogen (N) | 0.15 |
| I-Molybdenum (Mo) | 4.00 - 5.00 |
| Ithusi (Cu) | 1.20 - 2.00 |
| Insimbi (Fe) | Ibhalansi |
Izakhiwo zemishini
Izakhiwo zemishini (emazingeni okushisa asekamelweni esimweni esishubile)
| Ifomu Lomkhiqizo | |||||||
| C | H | P | L | L | TW/TS | ||
| Ubukhulu (mm) Max. | 8.0 | 13.5 | 75 | 160 | 2502) | 60 | |
| Isivuno Amandla | I-Rp0.2 N/mm2 | 2403) | 2203) | 2203) | 2304) | 2305) | 2306) |
| Rp1.0 N/mm2 | 2703) | 2603) | 2603) | 2603) | 2603) | 2503) | |
| Amandla Okuqina | Rm N/mm2 | 530 - 7303) | 530 - 7303) | 520 - 7203) | 530 - 7304) | 530 - 7305) | 520 - 7206) |
| Elongation min. nge-% | U-Jmin (Longitudinal) | - | 100 | 100 | 100 | - | 120 |
| U-Jmin (Unqamule) | - | 60 | 60 | - | 60 | 90 | |
Idatha yesithenjwa
| Ukuminyana ku-20°C kg/m3 | 8.0 | |
| I-Thermal Conductivity W/m K at | 20°C | 12 |
| I-Modulus ye-Elasticity kN/mm2 ku- | 20°C | 195 |
| 200°C | 182 | |
| 400°C | 166 | |
| 500°C | 158 | |
| Amandla Akhethekile Okushisa ku-20°CJ/kg K | 450 | |
| Ukumelana Nogesi kokuthi 20°C Ω mm2/m | 1.0 | |
Iyacubungula / Welding
Izinqubo zokushisela ezijwayelekile zaleli banga lensimbi yilezi:
- I-TIG-Welding
- I-MAG-Welding Solid Wire
- I-Arc Welding (E)
- I-Laser Bean Welding
- I-Summerged Arc Welding (SAW)
Lapho ukhetha insimbi yokugcwalisa, ukucindezeleka kokugqwala kufanele kubhekwe, futhi. Ukusetshenziswa kwensimbi ephezulu ye-alloyed filler kungadingeka ngenxa yesakhiwo sensimbi ye-weld metal. A preheating akudingekile kule steel. Ukwelashwa kokushisa ngemva kokushisela ngokuvamile akuvamile. Izinsimbi ze-Austenitic zine-30% kuphela ye-thermal conductivity yezinsimbi ezingenalo i-alloyed. Iphoyinti labo lokuhlanganisa liphansi kunalelo lensimbi engafakwanga ialloyed ngakho-ke izinsimbi ze-austenitic kufanele zishiselwe ngokufakwa kokushisa okuphansi kunezinsimbi ezingafakwanga. Ukuze ugweme ukushisa ngokweqile noma ukushiswa kwamashidi amancane, isivinini sokushisela kufanele sisetshenziswe. Amapuleti asekela ithusi okwenqatshwa kokushisa okusheshayo ayasebenza, kanti, ukuze kugwenywe ukuqhekeka kwensimbi ye-solder, akuvunyelwe ukufaka phezulu-fuse ipuleti le-backup plate. Le nsimbi ine-coefficient ephezulu kakhulu yokunwetshwa okushisayo njengensimbi engafakwanga. Ngokuphathelene ne-conductivity yokushisa embi kakhulu, ukuhlanekezela okukhulu kufanele kulindelwe. Lapho Welding 1.4539 zonke izinqubo, ezisebenza ngokumelene lokhu ukuhlanekezela (isb. back-step ukulandelana Welding, Welding ngokushintshana ezinhlangothini ezihlukene nge double-V butt weld, isabelo amawelda ezimbili lapho izingxenye zinkulu ngokufanele) kufanele ihlonishwe ngokuphawulekayo. Ngobukhulu bomkhiqizo obungaphezu kuka-12mm i-double-V butt weld kufanele ikhethwe esikhundleni se-single-V butt weld. I-engeli ehlanganisiwe kufanele ibe ngu-60 ° - 70 °, uma usebenzisa i-MIG-welding cishe 50 ° yanele. Ukuqoqwa kwama-weld seams kufanele kugwenywe. Ama-tack weld kufanele ananyathiselwe amabanga amafushane ukusuka komunye nomunye (amafushane kakhulu kunalawa wezinsimbi ezingahlanganisiwe), ukuze kuvinjelwe ukuguquguquka okuqinile, ukushwabana noma ukugoba amashisela. Amatheki kufanele agaywe kamuva noma okungenani angabi nemifantu ye-crater. 1.4539 mayelana nensimbi ye-austenitic weld kanye nokokufaka kokushisa okuphezulu kakhulu ukulutheka ukwenza imifantu yokushisa kukhona. Ukulutha kwemifantu yokushisa kungavaleka, uma insimbi yokushisela ifaka okuqukethwe okuphansi kwe-ferrite (delta ferrite). Okuqukethwe kwe-ferrite kufika ku-10% kunomthelela omuhle futhi akuthinti ukumelana nokugqwala ngokuvamile. Isendlalelo esincanyana kakhulu ngangokunokwenzeka kufanele sishiselwe (isu lobuhlalu obuqinile) ngoba isivinini sokupholisa esiphezulu sinciphisa ukuluthwa kwemifantu eshisayo. Ukupholisa okusheshayo okungcono kakhulu kufanele kukhuthazwe ngenkathi kushiselwa futhi, ukugwema ukuba sengozini kokugqwala kwe-intergranular kanye ne-embrittlement. I-1.4539 ifaneleka kakhulu i-laser beam welding (weldability A ngokuvumelana ne-DVS bulletin 3203, ingxenye 3). Ngobubanzi be-welding groove encane kuno-0.3mm ngokulandelana 0.1mm ubukhulu bomkhiqizo ukusetshenziswa kwezinsimbi zokugcwalisa akudingekile. Ngemijondolo emikhulu yokushisela insimbi efanayo yokugcwalisa ingasetshenziswa. Ngokugwema i-oxidation ngaphakathi komthungo we-laser surface welding ngokushisela okusebenzayo kwe-backhand, isb i-helium njengegesi engasebenzi, umthungo wokushisela umelana nokugqwala njengensimbi eyisisekelo. Ingozi eshisayo yokuqhuma kwe-welding seam ayikho, lapho ukhetha inqubo esebenzayo. 1.4539 i-alos ilungele ukusika i-laser beam fusion nge-nitrogen noma ukusika ilangabi nge-oxygen. Amaphethelo asikiwe anezindawo ezincane ezithintekile ekushiseni futhi ngokuvamile awanayo imifantu ye-mirco futhi ayakheka kahle. Ngenkathi kukhethwa izinqubo ezisebenzayo imiphetho ye-fusion cut ingaguqulwa ngokuqondile. Ikakhulukazi, zingafakwa ezishiselwe ngaphandle kokulungiselela okwengeziwe. Ngenkathi kucutshungulwa amathuluzi angagqwali kuphela njengamabhulashi ensimbi, okokukhetha umoya nokunye kuvunyelwe, ukuze kungafaki engcupheni i-passivation. Kufanele kunganakwa ukumaka ngaphakathi kwendawo yokuthungela ngomthungo ngamabhawudi e-oleaginous noma izinga lokushisa elibonisa amakhrayoni. Ukumelana nokugqwala okuphezulu kwale nsimbi engagqwali kusekelwe ekwakhekeni kwe-homogeneous, ungqimba lwe-compact passive ebusweni. Imibala ye-annealing, izikali, izinsalela ze-slag, i-tramp iron, ama-spatter nokunye okunjalo kufanele kususwe, ukuze kungabhubhisi ungqimba lwe-passive. Ukuze kuhlanzwe indawo engaphezulu izinqubo zokuxubha, ukugaya, ukukha noma ukuqhumisa (isihlabathi se-silica esingenansimbi noma ama-glass sphere) angasetshenziswa. Ukuxubha amabhulashi ensimbi kuphela angasetshenziswa. Ukuqoqwa kwendawo yomthungo ebhulashiwe ngaphambili kwenziwa ngokucwiliswa nokufafaza, noma kunjalo, kuvame ukunamathela ama-pickle noma izixazululo. Ngemuva kokutshala, ukugeza ngokucophelela ngamanzi kufanele kwenziwe.
