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 ye-Elasticity kN/mm2 kwi | 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 ifaneleke kakhulu kwi-laser beam welding (weldability A ngokuhambelana ne-DVS bulletin 3203, inxalenye ye-3).Ngobubanzi be-welding groove encinci kune-0.3mm ngokulandelelana kwe-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 njengegesi engasebenziyo, umthungo wokuwelda uxhathisa ukudleka njengesiseko sesinyithi.Ingozi eshushu yokuqhekeza i-welding seam ayikho, xa ukhetha inkqubo esebenzayo.I-1.4539 i-alos ilungele ukusika i-laser beam fusion nge-nitrogen okanye ukusika idangatye 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 njengeebhrashi zentsimbi, iipeki ze-pneumatic njalo njalo zivumelekile, ukuze ungabeki emngciphekweni i-passivation.Kufuneka ingahoywa ukuphawula ngaphakathi kwendawo yokuwelda ithungo ngeebholiti ze-oleaginous okanye ubushushu obubonisa iikhrayoni.Ukuxhathisa i-corrosions ephezulu yale nsimbi engenasici isekelwe ekubunjweni kwe-homogeneous, i-compact passive layer phezu komhlaba.Imibala ye-anealing, izikali, iintsalela ze-slag, i-iron ye-tramp, i-spatter kunye nezinto ezinjalo kufuneka zisuswe, ukuze zingatshabhisi i-passive layer.Ukucoca umphezulu iinkqubo zokuxukuxa, ukugaya, ukuchola okanye ukuqhushumba (isanti ye-silica engena-iron okanye i-glass spheres) ingasetyenziswa.Ukuxubha kuphela iibrashi zensimbi ezingenasici zingasetyenziswa.Ukuchongwa kwendawo yomthungo ehlanjululweyo ngaphambili kuqhutywa ngokuntywila kunye nokutshiza, nangona kunjalo, ngokuqhelekileyo i-pickling pastes okanye izisombululo zisetyenziswa.Emva kokuvuna, kufuneka kuhlanjululwe ngokucokisekileyo ngamanzi.
