- Type: 904L chubu pepala
- zakuthupi: 1.4539 (Aloyi 904L/UNS N08904)
- Standard: ASME, etc
- Kukula: OD: 1385 MM
- THK: 240 MM
904L ndi chiyani?
904L chitsulo chosapanga dzimbiri cha austenitic chili ndi 14.0-18.0% chromium, 24.0-26.0% nickel, ndi 4.5% molybdenum. 904L super austenitic chitsulo chosapanga dzimbiri ndi chitsulo chotsika kakabu, faifi tambala, molybdenum austenitic zosapanga dzimbiri zosagwira asidi. Ili ndi mphamvu yabwino yosinthira-passivation, kukana kwa dzimbiri, kukana bwino kwa dzimbiri mu ma acid omwe si oxidizing monga sulfuric acid, acetic acid, formic acid, ndi phosphoric acid, kukana bwino kwa pitting mu media zomwe zili ndi chloride ion, komanso kukana bwino. kuti muchepetse dzimbiri komanso kupanikizika kuti musawononge dzimbiri. Ndi oyenera ndende zosiyanasiyana za asidi sulfuric pansipa 70 ℃ ndipo ali ndi dzimbiri kukana mu asidi asidi wa ndende iliyonse ndi kutentha kulikonse pa kuthamanga mumlengalenga, ndi zidulo osakaniza formic acid ndi asidi asidi.
Super austenitic chitsulo chosapanga dzimbiri 904L (00Cr20Ni25Mo4.5Cu; UNS: N08904; EN: 1.4539) ndi chitsulo chosapanga dzimbiri chosapanga dzimbiri cha austenitic chokhala ndi mpweya wochepa komanso kukana dzimbiri mu dilute sulfuric acid, yopangidwira malo okhala ndi dzimbiri. Pokhala ndi chromium yambiri komanso nickel yokwanira, kuwonjezera kwa mkuwa kumapangitsa kukhala kolimba kwa asidi kukana, makamaka kwa chloride interstitial corrosion ndi kupsinjika kwa dzimbiri kusweka ndi kukana kwakukulu, osawoneka bwino mawanga a dzimbiri ndi ming'alu, kukana kwa pitting kuli bwinoko pang'ono kuposa zitsulo zina. kalasi, ndi workability wabwino ndi weldability, angagwiritsidwe ntchito zotengera kuthamanga.
- Mphamvu yamphamvu, Rm = 530 - 570 MPa
- Zokolola, Rp0,2> 230 MPa
- Elongation, A:> 35%
- Modulus of elasticity, E: 195 GPa
- Kutentha mphamvu, cp20 ℃ = 450 J * kg-1 *K-1
- Kutentha kwa kutentha, λ: 12 W * m-1 *K-1
- Linear Expansion Factor, α20℃=15,8 * 10-6 *K-1
- Kukana kwachindunji: 1 Ω * mm2/m
- Kulimba: <230 HB
Maphunziro ndi miyezo.
UNS N08904 (American Society of Motor Vehicle Engineers ndi American Society for Testing and Equipment mu 1967 inapanga muyeso), DIN1.4539 (muyezo waku Germany), ASTM A240 (American Society for Testing and Equipment standard; mulingo watsopanowu usankhidwa monga mndandanda wazitsulo zosapanga dzimbiri, muyeso woyambirira wa ASME SB-625 udzakhala wamtundu wa fayilo-based alloy series), SUS890L.
Mapangidwe a metallographic a 904L chitsulo chosapanga dzimbiri:
904L ndi bungwe la austenitic kwathunthu, poyerekeza ndi chitsulo chosapanga dzimbiri cha austenitic chokhala ndi molybdenum, 904L sichimakhudzidwa ndi mpweya wa ferrite ndi alpha.
Thupi ndi makina katundu.
Kachulukidwe: 8.0g/cm3.
SS 904L Gawo Lofanana
Zidziwitso zomwe zili pansipa zikufotokozera mwachidule kalasi yofanana ndi Rolex 904L zitsulo zosapanga dzimbiri monga European EN (German DIN EN, British BS EN, French NF EN…), Chinese GB, ISO, Japanese JIS standard.
AISI 904L zinthu zofanana | |||||||||
US | mgwirizano wamayiko aku Ulaya | ISO | Japan | China | |||||
Standard | Type | Standard | Gulu (Nambala yachitsulo) | Standard | Dzina la ISO (Nambala ya ISO) | Standard | kalasi | Standard | kalasi |
AISI SAE; Chithunzi cha ASTM | 904L (UNS N08904) | EN 10088-2; EN 10088-3 | X1NiCrMoCu25-20-5 (1.4539) | ISO 15510 | X1NiCrMoCu25-20-5 (4539-089-04-I) | Zamgululi | Mtengo wa 890L | GB/T 20878; GB/T 4237; GB/T 3280 | 015Cr21Ni26Mo5Cu2 |
Zolemba ndi tsatanetsatane wa 904L
Tsamba lotsatirali likufotokozera mwachidule za mankhwala, katundu, chithandizo cha kutentha ndi kalasi yofanana ya 904L zitsulo zosapanga dzimbiri (SS904L).
Mankhwala a 904L
Tsamba lotsatirali limapereka mankhwala a SS 904L osapanga dzimbiri.
Mapangidwe a Chemical,% | |||||||||||||
ASTM | UNS | Type | C, ≤ | Inu, ≤ | Mwa, ≤ | P, ≤ | S, ≤ | Cr | Ni | Mo | N, ≤ | Cu | Ndemanga (Katundu) |
ASTM A276 / A276M | UNS S08904 | 904L | 0.02 | 1 | 2 | 0.045 | 0.03 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 0.1 | 1.0-2.0 | Mipiringidzo ndi Mawonekedwe |
ASTM A240 / A240M | Mbale, Mapepala, ndi Mzere |
Zida Zamagetsi pa 904l
Gome lotsatirali limatchula Rolex 904L zitsulo zosapanga dzimbiri (SS904L) monga mphamvu zokolola, kulimba kwamphamvu, kutalika ndi kuuma.
AISI ASTM 904L Zitsulo Mechanical Properties | |||||||
ASTM | Mtundu wa AISI | Kuthamanga Kwambiri, MPa (ksi), ≥ | 0.2% Mphamvu Zokolola, MPa (ksi), ≥ | Elongation mu 50 mm (2 mu.), %, ≥ | Kuuma kwa Rockwell (HRBW), ≤ | Mafomu azinthu | zokwaniritsa |
ASTM A276 / A276M | 904L (UNS N08904) | 490 (71) | 220 (31) | 35 | - | Mipiringidzo ndi Mawonekedwe | Annealed, Kutentha-kumaliza kapena ozizira-kumaliza |
ASTM A240 / A240M | 490 (71) | 220 (31) | 35 | 90 | Mbale, Mapepala, ndi Mzere |
Chithandizo cha Kutentha pa 904l
Annealing: Kutentha kovomerezeka kwa annealing kwa 904L chitsulo chopangidwa ndi 1095 °C (2000 °F).
Kukana kwa dzimbiri kwa 904L chitsulo chosapanga dzimbiri
Popeza mpweya wa 904L ndi wotsika kwambiri (max. 0.020%), palibe mpweya wa carbide pansi pa chithandizo cha kutentha ndi kuwotcherera. Izi zimathetsa chiopsezo cha dzimbiri intergranular kuti zimachitika pambuyo ambiri kutentha mankhwala ndi kuwotcherera. Chifukwa cha kuchuluka kwa chromium-nickel-molybdenum komanso kuphatikizika kwa zinthu zamkuwa, 904L imatha kuchepetsedwa ngakhale pakuchepetsa malo monga sulfuric acid ndi formic acid. Kuchuluka kwa nickel kumapereka chiwopsezo chochepa cha dzimbiri ngakhale pakugwira ntchito. Mu ndende osiyanasiyana 0-98% koyera sulfuric acid, 904L angagwiritsidwe ntchito pa kutentha kwa madigiri 40 Celsius. Mu asidi wa phosphoric mu ndende ya 0-85%, kukana kwake kwa dzimbiri ndikwabwino kwambiri. M'mafakitale phosphoric acid opangidwa ndi njira yonyowa, zonyansa zimakhudza kwambiri kukana kwa dzimbiri. Mu mitundu yonse ya asidi phosphoric, 904L dzimbiri kukana ndi bwino kuposa zitsulo zosapanga dzimbiri wamba. Mumphamvu oxidizing asidi nitric, 904L ali otsika dzimbiri kukana poyerekeza kwambiri alloyed zitsulo sukulu popanda molybdenum. Mu hydrochloric acid, kugwiritsa ntchito 904L kumangokhala otsika 1-2%. Izi ndende osiyanasiyana. 904L ili ndi kukana kwa dzimbiri bwino kuposa zitsulo wamba zosapanga dzimbiri. Chitsulo cha 904L chimakhala ndi kukana kwakukulu kwa dzimbiri. Kukana kwake kwa dzimbiri kumapanganso bwino mu njira za chloride. Nickel ya 904L yochuluka imachepetsa kuchuluka kwa dzimbiri m'maenje ndi m'ming'alu. Zitsulo zosapanga dzimbiri zosapanga dzimbiri za austenitic zimatha kukhudzidwa ndi kupsinjika kwa dzimbiri m'malo olemera kwambiri a chloride pa kutentha pamwamba pa 60 ° C. Kulimbikitsa uku kungachepetsedwe powonjezera nickel zomwe zili muzitsulo zosapanga dzimbiri. Chifukwa cha kuchuluka kwa nickel, 904L imakhala ndi kukana kwakukulu kwa kupsinjika kwa dzimbiri m'mayankho a chloride, mayankho okhazikika a hydroxide ndi malo okhala ndi hydrogen sulfide.
Processing ntchito pa 904l
Welding ntchito pa 904l
Monga zitsulo zosapanga dzimbiri, 904L imatha kuwotcherera pogwiritsa ntchito njira zosiyanasiyana zowotcherera. Njira yowotcherera yomwe imagwiritsidwa ntchito kwambiri pakuwotcherera kwa arc kapena kuwotcherera kwa inert, ndodo yowotcherera kapena chitsulo chawaya kutengera kapangidwe ka maziko. chuma chachitsulo ndi chiyero chapamwamba, zofunikira za molybdenum kuposa zoyambira. Kutenthetsa nthawi zambiri sikofunikira musanayambe kuwotcherera, koma pozizira panja, kuti mupewe kukhazikika kwa nthunzi yamadzi, olowa kapena malo oyandikana nawo amatha kutenthedwa mofanana. Dziwani kuti kutentha m'deralo sayenera upambana 100 ℃, kuti asatsogolere mpweya agglomeration, kuchititsa dzimbiri intergranular. Kuwotcherera kuyenera kugwiritsa ntchito mphamvu yaying'ono, yopitilira komanso yofulumira. Pambuyo kuwotcherera ambiri safuna kutentha mankhwala, ngati kutentha mankhwala, ayenera usavutike mtima kwa 1100-1150 ℃ pambuyo kuzirala mofulumira.
Kufananiza kuwotcherera consumables: kuwotcherera ndodo (E385-16/17), kuwotcherera waya (ER385).
Kuthekera pa 904l
904L Machining makhalidwe ofanana ndi ena austenitic zosapanga dzimbiri zitsulo, ndondomeko ali ndi chizolowezi chomata chida ndi ntchito kuumitsa. Ayenera kugwiritsa ntchito zabwino kutsogolo ngodya carbide zida, sulfide ndi chlorinated mafuta monga kudula coolant, zida ndi ndondomeko ayenera kuchepetsa maziko a Machining kuumitsa. Kuthamanga kwapang'onopang'ono ndi chakudya cha zida ziyenera kupewedwa podula.
Kodi pepala la chubu ndi chiyani?
Mapepala a chubu ndi mbale zachitsulo zamapaipi omwe amagwiritsidwa ntchito posinthanitsa kutentha, ma boilers, zotengera zokakamiza, ndi ma condensers. Mapepala a chubu amapangidwa ndi zinthu zosiyanasiyana malinga ndi kutentha ndi kukakamizidwa kwa ntchito. Masamba a chubu amakhala ndi machubu angapo amtundu wabwinobwino kapena machubu akulu akulu. Mapepala a chubu sanabowole koma amakhala ndi mabowo otsekera mozungulira mozungulira komanso pakatikati. Mapepala a chubu amakhala ndi mabowo a bawuti omwe amalumikizana ndi malekezero a chubu. Pepala la chubu limakhazikika ndi zikhomo za dowel ndipo nthawi zina zimakhala ndi zowonjezera zowonjezera. Gasket imayikidwa pakati pa chubu ndi chivundikiro cha njira.
Ma chubu ndi mbale za mapaipi omwe amagwiritsidwa ntchito posinthanitsa kutentha, ma boilers, zotengera zokakamiza, ndi ma condensers.
Zitha kupangidwa ndi chitsulo cha carbon kapena chitsulo chosapanga dzimbiri. Mapepala ambiri a chubu amakhala ndi nembanemba yomwe imalekanitsa chubu kuchokera kupsinjika mkati mwa chotengera chomwe chimateteza.
Mapepala a chubu amapangidwa ndi chitsulo cha carbon, chitsulo chosapanga dzimbiri kapena zipangizo zina kutengera kutentha ndi kukakamizidwa kwa ntchito.
Ma chubu amagwiritsidwa ntchito pazinthu zosiyanasiyana kuphatikiza zosinthira kutentha, ma boilers, zotengera zokakamiza ndi ma condensers. Kugwiritsa ntchito kwawo nthawi zambiri kumakhala kocheperako chifukwa cha kutentha kwake komwe kumatha kusiyana kuchokera pansi pa 450 ° C mpaka 1200 ° C. Mwachitsanzo:
- Kupanga mapepala achitsulo (ASTM 1474)
- Chitsulo chosapanga dzimbiri chubu kupanga mapepala (ASTM 1573)
Masamba a chubu amakhala ndi machubu angapo amtundu wabwinobwino kapena machubu akulu akulu.
The chubu ndiye chigawo chachikulu cha structural mu chotenthetsera kutentha ndipo imagwira ntchito yofunika kwambiri pa ntchito, monga kuletsa kutopa kwa kutentha kwa machubu kuti asatenthedwe komanso kupewa kubisala komwe kumakhalako.
Ma chubu nthawi zambiri amapangidwa kuchokera ku mbale zazitsulo za kaboni kapena mbale zitsulo zosapanga dzimbiri ndi seams welded kupanga a mbale ya chubu msonkhano umene umapirira kutentha kwakukulu ndi makulidwe ochepa a khoma. Gululi litha kulumikizidwa pamodzi ndi makina (kuwotcherera), kapena kugwiritsa ntchito njira zowotcherera za arc yamagetsi (mwachitsanzo, kuwotcherera pansi pamadzi).
Mapepala a chubu sanabowoledwe mokwanira, koma amakhala ndi mabowo otsekera mozungulira mozungulira komanso pakatikati.
Mapepala a chubu alibe mabowo a bawuti pakatikati pa pepala la chubu. Chifukwa chake ndikuti mukakhazikitsa khoma, palibe chifukwa chodula chilichonse pafupi ndi zenera kapena zitseko zanu chifukwa sadzakhalapobe.
Mapepala a chubu amakhala ndi mabowo a bawuti omwe amalumikizana ndi malekezero a chubu.
Mapepala a chubu amagwiritsidwa ntchito pomanga ziwalo zazitsulo zazitsulo monga mizati, matabwa ndi ma trusses. Kukula kwa mapepala a chubu kumatengera kukula kwakunja kwa chubu chomwe chikugwiritsidwa ntchito. Mapepala a chubu ali ndi mabowo a bawuti omwe amalumikizana ndi machubu malekezero; mabowo a bawuti awa amatha kukhala pamalo osiyanasiyana papepala la chubu kutengera kukula kwake.
Ma chubu amakhazikika ndi mapini a dowel ndipo nthawi zina amakhala ndi zowonjezera zowonjezera.
Gasket imayikidwa pakati pa chubu ndi chivundikiro cha njira.
Zimalepheretsa kutuluka ndipo zimapangidwa ndi mphira, komanso zimatha kupangidwa ndi zipangizo zina.
China Wopanga Mapepala a Tube www.epowermetals.com imapereka 904L Tube Sheet THK: 240 MM OD: 1385 MM.