Igwe anaghị agba nchara 904L 1.4539
Ngwa
Osisi kemịkalụ, ụlọ nrụpụta mmanụ, osisi petrochemical, tankị ịcha ọcha maka ụlọ ọrụ akwụkwọ, osisi desulfurisation gas, ngwa n'ime mmiri mmiri, sulfuric na phosphoric acid. N'ihi ọdịnaya C dị ala, a na-ekwekwa nkwa nguzogide corrosion intergranular na ọnọdụ welded.
Ngwakọta kemịkalụ
| Ihe | % Dị ugbu a (n'ụdị ngwaahịa) |
| Carbon (C) | 0.02 |
| Silikon (Si) | 0.70 |
| Manganese (Mn) | 2.00 |
| Phosphorous (P) | 0.03 |
| Sulfur (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 |
| Ọla kọpa (Cu) | 1.20 - 2.00 |
| Ígwè (Fe) | Nhazi |
Ngwa igwe
Ihe eji arụ ọrụ (na ọnụ ụlọ okpomọkụ na ọnọdụ annealed)
| Ụdị ngwaahịa | |||||||
| C | H | P | L | L | TW/TS | ||
| Ọkpụrụkpụ (mm) Oke. | 8.0 | 13.5 | 75 | 160 | 2502) | 60 | |
| Mpụta Ike | Rp0.2 N/mm2 | 2403) | 2203) | 2203) | 2304) | 2305) | 2306) |
| Rp1.0 N/mm2 | 2703) | 2603) | 2603) | 2603) | 2603) | 2503) | |
| Ike ọdụdọ | Rm N/mm2 | 530-7303) | 530-7303) | 520-7203) | 530-7304) | 530-7305) | 520-7206) |
| Elongation min. na % | Jmin (Longitudinal) | - | 100 | 100 | 100 | - | 120 |
| Jmin (Ntugharị) | - | 60 | 60 | - | 60 | 90 | |
Data ntụaka
| Njupụta na 20°C kg/m3 | 8.0 | |
| Thermal Conductivity W/m K na | 20°C | 12 |
| Modulus nke Elasticity kN/mm2 na | 20°C | 195 |
| 200°C | 182 | |
| 400°C | 166 | |
| 500°C | 158 | |
| Ikike okpomọkụ akọwapụtara nke ọma na 20°CJ/kg K | 450 | |
| Mgbochi ọkụ eletrik na 20°C Ω mm2/m | 1.0 | |
Nhazi / ịgbado ọkụ
Usoro ịgbado ọkụ ọkọlọtọ maka ọkwa nchara a bụ:
- TIG-welding
- MAG- Welding Solid Waya
- Arc Welding (E)
- Laser Bean Welding
- Mgbado ọkụ n'okpuru mmiri (SAW)
Mgbe ị na-ahọrọ metal ndochi, a ghaghị ileba anya na nrụgide corrosion, yana. Ojiji nke elu alloyed filler metal nwere ike ịdị mkpa n'ihi nhazi nkedo nke weld metal. Igwe ọkụ adịghị mkpa maka ígwè a. A naghị emekarị ọgwụgwọ okpomọkụ mgbe ịgbado ọkụ. Steeti Austenitic nwere naanị 30% nke nrụpụta ọkụ nke igwe anaghị agba nchara. Ebe ngwakọta ha dị ala karịa nke nchara na-abụghị nke ya mere a na-eji ígwè austenitic welded na ntinye okpomọkụ dị ala karịa nchara na-abụghị ihe. Iji zere ikpo oke ọkụ ma ọ bụ ọkụ site na mpempe akwụkwọ dị gịrịgịrị, a ga-etinyerịrị ọsọ ịgbado ọkụ dị elu. Efere nkwado ọla kọpa maka ịjụ ọkụ ngwa ngwa na-arụ ọrụ, ebe, iji zere mgbawa na metal solder, ọ naghị ekwe ka ọ dị elu-jinye efere ndabere ọla kọpa. Nchara a nwere ọnụọgụ dị elu nke ukwuu nke mgbasawanye ọkụ dị ka igwe anaghị agba nchara. N'ihe gbasara ikpo ọkụ ọkụ ka njọ, a ghaghị ịtụ anya mgbagha ka ukwuu. Mgbe ịgbado ọkụ 1.4539 niile usoro, nke na-arụ ọrụ megide a distortion (eg azụ-nzọụkwụ usoro ịgbado ọkụ, ịgbado ọkụ alternately na-abụghị n'akụkụ na abụọ-V butt weld, ọrụ nke abụọ welders mgbe components bụ otú buru ibu) ga-akwanyere ùgwù nke ọma. Maka ọkpụrụkpụ ngwaahịa karịrị 12mm, a ga-ahọrọ weld butt okpukpu abụọ karịa otu V butt weld. Akụkụ gụnyere kwesịrị ịbụ 60° - 70°, mgbe ị na-eji MIG-welding banyere 50° ezuru. Ekwesịrị izere mkpokọta weld seams. A ga-etinyekwa akwa weld na anya dị mkpụmkpụ site na ibe ya (nke dị mkpụmkpụ karịa nke nchara ndị a na-abụghị nke alloyed), iji gbochie nrụrụ siri ike, na-ebelata ma ọ bụ na-akụda welds. Ekwesịrị ka egweri tacks ndị ahụ ma ọ bụ opekata mpe enweghị mgbawa oghere. 1.4539 na njikọ austenitic weld metal na oke okpomọkụ ntinye ihe riri ahụ iji mepụta mgbawa okpomọkụ dị. Enwere ike igbochi ihe riri ahụ na mgbawa ọkụ, ma ọ bụrụ na igwe weld na-egosipụta ọdịnaya dị ala nke ferrite (delta ferrite). Ọdịnaya nke ferrite ruru 10% nwere mmetụta dị mma yana anaghị emetụta nguzogide corrosion n'ozuzu ya. The thinnest oyi akwa dị ka o kwere ga-welded (stringer bead Usoro) n'ihi na elu jụrụ oyi na-ebelata riri ahụ na-ekpo ọkụ cracks. Ọkachamma ngwa ngwa jụrụ oyi ga-achọsi ike mgbe ị na-agbado ọkụ, iji zere adịghị ike na corrosion intergranular na embrittlement. 1.4539 dabara nke ọma maka ịgbado ọkụ laser (weldability A dị ka akwụkwọ akụkọ DVS 3203, akụkụ 3). Site na obosara nke ịgbado ọkụ dị obere karịa 0.3mm n'otu n'otu 0.1mm ọkpụrụkpụ ngwaahịa, iji igwe ndochi adịghị mkpa. Site na oghere ịgbado ọkụ ka ukwuu, enwere ike iji igwe ndochi yiri ya. Na-ezere ọxịdashọn n'ime onuete n'elu laser doo ịgbado ọkụ site na ọdabara backhand ịgbado ọkụ, eg helium dị ka inert gas, ịgbado ọkụ onuete dị ka corrosion eguzogide dị ka isi metal. Ihe egwu na-ekpo ọkụ maka ịgbado ọkụ adịghị adị, mgbe ị na-ahọrọ usoro ọdabara. 1.4539 bụ alos kwesịrị ekwesị maka ịcha ọkụ ọkụ laser na nitrogen ma ọ bụ igbutu ọkụ na oxygen. Akụkụ ndị a gbupụrụ nwere naanị obere mpaghara okpomọkụ emetụtara ma na-enwekarị mgbawa mirco ma si otú a na-eme nke ọma. Mgbe ị na-ahọrọ usoro ọdabara, enwere ike ịgbanwe akụkụ ọnụ nke ngwakọta ahụ ozugbo. Karịsịa, enwere ike ịgbanye ha n'enweghị nkwadebe ọzọ. Mgbe a na-anabata naanị ngwaọrụ igwe anaghị agba nchara dị ka brushes nchara, pneumatic picks na ihe ndị ọzọ, ka ị ghara itinye ngafe ahụ n'ihe egwu. Ekwesịrị ileghara ya itinye akara n'ime mpaghara ịgbado ọkụ na bolts oleaginous ma ọ bụ okpomọkụ na-egosi crayons. Mgbochi corrosions dị elu nke igwe anaghị agba nchara na-adabere na nguzobe nke otu, kọmpat na-agafe agafe n'elu. A ga-ewepụrịrị agba, akpịrịkpa, ihe ndị na-adịghị mma, ígwè tramp, sptters na ihe ndị dị otú ahụ, ka ọ ghara ibibi oyi akwa. Maka ihicha elu, a na-etinye usoro ịhịa aka n'ahụ, ịhịa aka n'ahụ, ịhịa aka n'ahụ ma ọ bụ ịgba ọkụ (aja silica na-enweghị ígwè ma ọ bụ akụkụ iko). Maka ịsa ahịhịa naanị igwe anaghị agba nchara ka enwere ike iji. A na-arụ ebe a na-akpachapụ anya na mbụ site n'itinye na ịfesa, agbanyeghị, a na-ejikarị pastes ma ọ bụ ihe ngwọta eme ihe. Mgbe pickling a nlezianya na-asacha na mmiri ga-eme ya.
