Stainless Simbi 904L 1.4539
Application
Chemical chirimwa, mafuta ekunatsa, petrochemical zvidyarwa, bleaching matangi eindasitiri yemapepa, combustion gasi desulfurisation zvidyarwa, kushandiswa mumvura yegungwa, sulfuric uye phosphoric acid. Nekuda kweiyo yakaderera C-mukati, kushorwa kune intergranular corrosion zvakare kunovimbiswa mune welded mamiriro.
Chemical Compositions
| Element | % Iripo (muchimiro chechigadzirwa) |
| Kabhoni (C) | 0.02 |
| Silicon (Si) | 0.70 |
| Manganese (Mn) | 2.00 |
| Phosphorous (P) | 0.03 |
| Sarufa (S) | 0.01 |
| Chromium (Cr) | 19.00 - 21.00 |
| Nickel (Ni) | 24.00 - 26.00 |
| Nitrogen (N) | 0.15 |
| Molybdenum (Mo) | 4.00 - 5.00 |
| Mhangura (Cu) | 1.20 - 2.00 |
| Simbi (Fe) | Balance |
Mechanical properties
Mechanical properties (pakamuri tembiricha mune annealed mamiriro)
| Product Form | |||||||
| C | H | P | L | L | TW/TS | ||
| Hukobvu (mm) Max. | 8.0 | 13.5 | 75 | 160 | 2502) | 60 | |
| Goho Simba | Rp0.2 N/mm2 | 2403) | 2203) | 2203) | 2304) | 2305) | 2306) |
| Rp1.0 N/mm2 | 2703) | 2603) | 2603) | 2603) | 2603) | 2503) | |
| Tensile Simba | Rm N/mm2 | 530 - 7303) | 530 - 7303) | 520 - 7203) | 530 - 7304) | 530 - 7305) | 520 - 7206) |
| Elongation min. mu% | Jmin (Longitudinal) | - | 100 | 100 | 100 | - | 120 |
| Jmin (Transverse) | - | 60 | 60 | - | 60 | 90 | |
Reference data
| Density pa20°C kg/m3 | 8.0 | |
| Thermal Conductivity W/m K pa | 20°C | 12 |
| Modulus yeElasticity kN/mm2 pa | 20°C | 195 |
| 200°C | 182 | |
| 400°C | 166 | |
| 500°C | 158 | |
| Chaiyo Kupisa Kwekukwanisa pa20°CJ/kg K | 450 | |
| Electrical Resistivity pa20°C Ω mm2/m | 1.0 | |
Processing / Welding
Standard welding maitiro eiyi simbi giredhi ndeaya:
- TIG-Welding
- MAG-Welding Solid Wire
- Arc Welding (E)
- Laser Bean Welding
- Submerged Arc Welding (SAW)
Pakusarudza simbi yekuzadza, iyo corrosion stress inofanirwa kutariswa, zvakare. Iko kushandiswa kweyepamusoro alloyed filler simbi inogona kudikanwa nekuda kweiyo cast chimiro che weld simbi. A preheating haidiwi kune iyi simbi. Mushonga wekupisa mushure mekuputira kazhinji hausi kujairika. Austenitic steels chete ine 30% yekupisa conductivity yesimbi isina-alloyed. fusion point yavo yakadzikira pane yeasina-alloyed simbi saka austenitic simbi dzinofanirwa kuiswa welded ine yakaderera kupisa inopinda pane isina-alloyed simbi. Kuti udzivise kupisa kana kupisa-kuburikidza nemashiti matete, kumhanya kwakakwira welding kunofanirwa kuiswa. Mhangura-back-up plates yekukurumidza kurambwa kwekupisa inoshanda, nepo, kudzivirira kutsemuka kwesimbi inotengeswa, haibvumirwe kuisa pamusoro-fuse mhangura yekumashure-up plate. Simbi iyi ine yakawandisa yakakwira coefficient yekuwedzera kwekupisa sesimbi isina-alloyed. Mukubatana nehuipi hwekupisa conductivity, kukanganisa kukuru kunofanira kutarisirwa. Kana welding 1.4539 maitiro ese, anoshanda achipesana nekukanganiswa uku (semuenzaniso kuseri-nhanho sequence welding, welding alternately pamativi akapesana nedouble-V butt weld, kugoverwa kwemawelder maviri kana zvikamu zvakakura) zvinofanirwa kuremekedzwa zvakanyanya. Pakukora kwechigadzirwa pamusoro pe12mm iyo double-V butt weld inofanirwa kusarudzwa pane imwe-V butt weld. Iyo inosanganisirwa kona inofanirwa kuve 60 ° - 70 °, kana uchishandisa MIG-welding nezve 50 ° inokwana. Kuunganidza weld seams kunofanira kudziviswa. Tack welds dzinofanirwa kunamirwa zvinhambwe zvipfupi kubva kune imwe neimwe (yakanyanya kupfupika kupfuura aya easina-alloyed simbi), kuitira kudzivirira kusimba kwakasimba, kuderera kana kuputika tack welds. Mateki anofanirwa kugayiwa kana kuti arege kubva pakatsemuka. 1.4539 ine chekuita ne austenitic weld simbi uye yakawandisa kupisa kupinza kupindwa muropa kugadzira kupisa kunenge kuripo. Kupindwa muropa nekupisa kutsemuka kunogona kuvharirwa, kana iyo weld simbi iine yakaderera yemukati yeferrite (delta ferrite). Zviri mukati me ferrite kusvika kugumi muzana zvine mhedzisiro yakanaka uye hazvikanganise corrosion kuramba kazhinji. Iyo thinnest layer sezvinobvira inofanirwa kuve welded (stringer bead technique) nekuti kutonhora kwepamusoro kunoderedza kupindwa muropa nekutsemuka kunopisa. Iko kutonhora nekukurumidza kunofanirwa kushuvira paunenge uchitungidza zvakare, kudzivirira njodzi ye intergranular corrosion uye embrittlement. 1.4539 yakanyatsokodzera laser beam welding (weldability A zvinoenderana neDVS bulletin 3203, chikamu 3). Iine welding groove yakafara idiki pane 0.3mm zvakateerana 0.1mm chigadzirwa ukobvu kushandiswa kwemasimbi ekuzadza hakudiwi. Iine mahombe ewelding simbi yakafanana yekuzadza simbi inogona kushandiswa. Nekunzvenga oxidation mukati meiyo seam pamusoro laser beam welding neanoshanda backhand welding, semuenzaniso helium seinert gasi, welding seam inoshingirira mukuora sesimbi yepasi. Iyo inopisa inoputika njodzi yewelding seam haipo, pakusarudza maitiro anoshanda. 1.4539 ndeye alos yakakodzera laser beam fusion yekucheka nenitrogen kana murazvo wekucheka neokisijeni. Iwo akachekwa mupendero anongove nediki diki rinokanganisika nzvimbo uye kazhinji haana mirco makatsemuka uye nekudaro anogadzirwa zvakanaka. Paunenge uchisarudza maitiro anoshanda iyo fusion yakachekwa mipendero inogona kushandurwa zvakananga. Kunyanya, vanogona kusungirirwa pasina kumwe kugadzirira. Paunenge uchigadzira chete maturusi asina tsvina senge mabhurashi esimbi, pneumatic picks uye zvichingodaro zvinotenderwa, kuitira kuti usaise mungozi iyo passivation. Iyo inofanirwa kuregeredzwa kumaka mukati meiyo welding seam zone ine oleaginous mabhaudhi kana tembiricha inoratidza makrayoni. Iyo yakakwira corrosion resistance yeiyi simbi isina tsvina inobva pakuumbwa kwehomogeneous, compact passive layer pamusoro. Anealing colours, zvikero, slag residues, tramp iron, spatters nezvimwe zvakadaro zvinofanirwa kubviswa, kuitira kuti zvisaparadze passive layer. Pakuchenesa pamusoro maitiro ekukwesha, kukuya, pickling kana kuputika (iron-isina silica jecha kana girazi spheres) inogona kuiswa. Pakukwesha mabhurashi esimbi chete anogona kushandiswa. Kunhonga kwenzvimbo yakashongedzerwa seam kunoitwa nekunyura uye kupfapfaidza, zvisinei, kazhinji pickling pastes kana mhinduro dzinoshandiswa. Mushure mekutora, kushambidza nemvura kunofanira kuitwa.
