iStainless Steel 904L 1.4539
Isicelo
Isityalo seMichiza, indawo yokucoca i-oyile, izityalo ze-petrochemical, iitanki ze-bleaching kumashishini ephepha, izityalo ezitshisa igesi ye-desulfurisation, ukusetyenziswa kwamanzi olwandle, i-sulfuric kunye ne-phosphoric acid. Ngenxa ye-C-content ephantsi, ukuchasana nokubola kwe-intergranular kuqinisekisiwe kwimeko edibeneyo.
Ukuqulunqwa kwemichiza
| Isiqalelo | % Ngoku (kwimo yemveliso) |
| Ikhabhoni (C) | 0.02 |
| Isilicon (Si) | 0.70 |
| IManganese (Mn) | 2.00 |
| Iphosphorus (P) | 0.03 |
| Isulfure (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 |
| Ubhedu (Cu) | 1.20 - 2.00 |
| Intsimbi (Fe) | Ibhalansi |
Iimpawu zoomatshini
Iipropati zeMechanical (kwiqondo lobushushu begumbi kwimeko edibeneyo)
| Ifom yeMveliso | |||||||
| C | H | P | L | L | TW/TS | ||
| Ukutyeba (mm) Ubukhulu. | 8.0 | 13.5 | 75 | 160 | 2502) | 60 | |
| Unikeze Amandla | Rp0.2 N/mm2 | 2403) | 2203) | 2203) | 2304) | 2305) | 2306) |
| Rp1.0 N/mm2 | 2703) | 2603) | 2603) | 2603) | 2603) | 2503) | |
| Tensile strength | Rm N/mm2 | 530 - 7303) | 530 - 7303) | 520 - 7203) | 530 - 7304) | 530 - 7305) | 520 - 7206) |
| Elongation min. kwi-% | Jmin (Longitudinal) | - | 100 | 100 | 100 | - | 120 |
| Jmin (Transverse) | - | 60 | 60 | - | 60 | 90 | |
Idatha yereferensi
| Uxinzelelo kwi-20 ° C kg / m3 | 8.0 | |
| I-Thermal Conductivity W/m K kwi | 20°C | 12 |
| Imodyuli yoElasticity kN/mm2 e | 20°C | 195 |
| 200°C | 182 | |
| 400°C | 166 | |
| 500°C | 158 | |
| Umthamo othe ngqo weThermal kwi-20°CJ/kg K | 450 | |
| Ukuxhathisa koMbane kwi-20°C Ω mm2/m | 1.0 | |
Ukulungiswa / ukuwelda
Iinkqubo zokuwelda ezisemgangathweni zolu didi lwentsimbi zezi:
- TIG-Welding
- MAG-Welding Ucingo oluqinileyo
- Ukuwelda kweArc (E)
- Laser Bean Welding
- Ukuwelda kweArc entywiliselweyo (SAW)
Xa ukhetha isinyithi sokuzalisa, uxinzelelo lwe-corrosion kufuneka lujongwe, ngokunjalo. Ukusetyenziswa kwetsimbi ye-alloyed filler ephezulu kunokuba yimfuneko ngenxa yesakhiwo sokuphoswa kwentsimbi ye-weld. Ukushisa kwangaphambili akuyimfuneko kule ntsimbi. Unyango olushushu emva kwe-welding aluqhelekanga. Iintsimbi ze-Austenitic zine-30% kuphela ye-thermal conductivity ye-non-alloyed steels. Indawo yabo yokudibanisa ingaphantsi kuneyentsimbi engaxutywanga ngoko ke iintsimbi ze-austenitic kufuneka zifakwe i-welded kunye negalelo eliphantsi lokushisa kunezinsimbi ezingenalo i-alloyed. Ukuze ugweme ukufudumala okanye ukutshisa-ngokusebenzisa amaphepha amancinci, isantya esiphezulu se-welding kufuneka sisetyenziswe. Iipleyiti ze-back-up ze-Copper zokugatya ubushushu ngokukhawuleza ziyasebenza, kanti, ukuphepha ukuqhekeka kwintsimbi ye-solder, akuvumelekanga ukuba i-surface-fuse i-copper back-up plate. Le ntsimbi ine-coefficient ephezulu kakhulu yokwandiswa kwe-thermal njengentsimbi engaxutywanga. Ngokunxulumene ne-thermal conductivity embi, ukuguqulwa okukhulu kufuneka kulindelwe. Xa ukuwelda 1.4539 zonke iinkqubo, ezisebenza ngokuchasene oku kugqwethwa (umzekelo, umva-inyathelo ukuwelda ulandelelwano, ukuwelda ngokutshintshanayo kumacala ahlukeneyo nge-double-V butt weld, isabelo se-welders ezimbini xa amacandelo amakhulu ngokufanelekileyo) kufuneka ahlonishwe ngokuphawulekayo. Kubunzima bemveliso obungaphezulu kwe-12mm i-double-V butt weld kufuneka ikhethwe endaweni ye-single-V butt weld. I-angle edibeneyo kufuneka ibe yi-60 ° - 70 °, xa usebenzisa i-MIG-welding malunga ne-50 ° yanele. Ukuqokelela kwee-weld seams kufuneka kugwenywe. Iintsimbi zokuwelda kufuneka zincanyathiselwe ngemigama emifutshane ukusuka kwenye (imfutshane kakhulu kunezi zintsimbi ezingadityaniswanga), ukuze kuthintelwe i-deformation eyomeleleyo, ukucutheka okanye ukugqabhuka. Iiteki kufuneka zicolwe emva koko okanye ubuncinane zingabi nazintanda zecrater. 1.4539 ngokunxulumene nentsimbi ye-austenitic weld kunye nobushushu obuphezulu kakhulu umlutha wokwenza iintanda zobushushu ukhona. Umlutha wokuqhekeka kobushushu unokuvalelwa, ukuba intsimbi ye-weld ibonisa umxholo ophantsi we-ferrite (delta ferrite). Imixholo ye-ferrite ukuya kuthi ga kwi-10% inesiphumo esihle kwaye ayichaphazeli ukuxhathisa ukubola ngokubanzi. Owona maleko we-thinnest kangangoko kunokwenzeka kufuneka udityaniswe (ubuchule be-stringer bead) kuba isantya esiphezulu sokupholisa sinciphisa umlutha kwiintanda ezishushu. Ukupholisa ngokukhawuleza okukhethekayo kufuneka kunqwenelwe ngelixa kufakwe i-welding ngokunjalo, ukunqanda ukuba sesichengeni kukonakala kwe-intergranular kunye ne-embrittlement. I-1.4539 ifanelekile kakhulu kwi-laser beam welding (weldability A ngokuhambelana ne-DVS bulletin 3203, inxalenye ye-3). Ngobubanzi be-welding groove encinci kune-0.3mm ngokulandelelana i-0.1mm ubukhulu bemveliso ukusetyenziswa kweentsimbi zokugcwalisa akuyimfuneko. Ngee-welding grooves ezinkulu isinyithi esifanayo sokuzalisa sinokusetyenziswa. Ngokunqanda i-oxidation kumphezulu womthungo welaser beam welding ngokuwelda okusebenzayo ngasemva, umz. i-helium njengerhasi engasebenziyo, umthungo wokuwelda uxhathisa umhlwa njengesiseko sesinyithi. Ingozi eshushu yokuqhekeka kwi-welding seam ayikho, xa ukhetha inkqubo esebenzayo. I-1.4539 i-alos ilungele ukusika i-laser beam fusion nge-nitrogen okanye ukusika i-flame nge-oxygen. Imiphetho esikiweyo ineendawo ezincinci ezichaphazelekileyo zobushushu kwaye azinazintanda ze-mirco kwaye zinokwakheka kakuhle. Ngelixa ukhetha iinkqubo ezisebenzayo i-fusion cut edges inokuguqulwa ngokuthe ngqo. Ngokukodwa, zinokudityaniswa ngaphandle kokulungiswa. Ngelixa kusetyenzwa kuphela izixhobo ezingenasici ezifana neebhrashi zentsimbi, iipeki ze-pneumatic njalo njalo zivumelekile, ukuze kungabikho kubeka emngciphekweni i-passivation. Kufuneka ingahoywa ukuphawula ngaphakathi kwendawo yokuwelda ithungo ngeebholiti ze-oleaginous okanye ubushushu obubonisa iikhrayoni. Ukuxhathisa i-corrosions ephezulu yale ntsimbi engenasici isekelwe ekubunjweni kwe-homogeneous, i-compact passive layer phezu komhlaba. Imibala ye-anealing, izikali, iintsalela ze-slag, i-iron tramp, i-spatters kunye nezinto ezinjalo kufuneka zisuswe, ukuze zingatshabhisi i-passive layer. Ukucoca umphezulu iinkqubo zokuxukuxa, ukugaya, ukukha okanye ukuqhushumba (isanti ye-silica engenantsimbi okanye i-glass spheres) ingasetyenziswa. Ukuxubha kuphela iibrashi zensimbi ezingenasici zingasetyenziswa. Ukuchongwa kwendawo yomthungo ngaphambili kuqhutyelwa ngokudipha kunye nokutshiza, nangona kunjalo, ngokuqhelekileyo i-pickling pastes okanye izisombululo zisetyenziswa. Emva kokuvuna, kufuneka kuhlanjululwe ngokucokisekileyo ngamanzi.
