Chitsulo chosapanga dzimbiri 904L 1.4539
Kugwiritsa ntchito
Chomera cha Chemical, choyenga mafuta, zomera za petrochemical, akasinja owukitsa amakampani opanga mapepala, zomera zoyaka gasi desulfurisation, kugwiritsa ntchito m'madzi am'nyanja, sulfuric ndi phosphoric acid. Chifukwa chochepa C-zilipo, kukana kwa intergranular dzimbiri kumatsimikizirikanso mu welded mkhalidwe.
Mapangidwe a Chemical
| Chinthu | % Yopezeka (mu mawonekedwe azinthu) |
| Mpweya (C) | 0.02 |
| Silicon (Si) | 0.70 |
| Manganese (Mn) | 2.00 |
| Phosphorous (P) | 0.03 |
| Sulfure (S) | 0.01 |
| Chromium (Cr) | 19.00 - 21.00 |
| Nickel (Ndi) | 24.00 - 26.00 |
| Nayitrogeni (N) | 0.15 |
| Molybdenum (Mo) | 4.00 - 5.00 |
| Mkuwa (Cu) | 1.20 - 2.00 |
| Chitsulo (Fe) | Kusamala |
Zimango katundu
Mechanical properties (pa kutentha kwa chipinda mu chikhalidwe cha annealed)
| Fomu Yogulitsa | |||||||
| C | H | P | L | L | TW/TS | ||
| Makulidwe (mm) Max. | 8.0 | 13.5 | 75 | 160 | 2502) | 60 | |
| Zokolola Mphamvu | Rp0.2 N/mm2 | 2403) | 2203) | 2203) | 2304) | 2305) | 2306) |
| Rp1.0 N/mm2 | 2703) | 2603) | 2603) | 2603) | 2603) | 2503) | |
| Kulimba kwamakokedwe | 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 (Wodutsa) | - | 60 | 60 | - | 60 | 90 | |
Zambiri zolozera
| Kachulukidwe pa 20°C kg/m3 | 8.0 | |
| Thermal Conductivity W/m K pa | 20°C | 12 |
| Modulus of Elasticity kN/mm2 pa | 20°C | 195 |
| 200 ° C | 182 | |
| 400°C | 166 | |
| 500°C | 158 | |
| Kuthekera Kwapadera kwa Kutentha kwa 20°CJ/kg K | 450 | |
| Kukaniza kwamagetsi pa 20°C Ω mm2/m | 1.0 | |
Processing / kuwotcherera
Njira zowotcherera zamtundu wachitsulo izi ndi:
- TIG-kuwotcherera
- MAG-Welding Solid Waya
- Kuwotcherera kwa Arc (E)
- Kuwotcherera Bean Laser
- Kuwotcherera kwa Arc (SAW)
Posankha zitsulo zodzaza, kupsinjika kwa dzimbiri kuyenera kuwonedwanso. Kugwiritsa ntchito chitsulo chapamwamba cha alloyed filler kungakhale kofunikira chifukwa cha kapangidwe ka chitsulo chowotcherera. A preheating sikofunikira kwa chitsulo ichi. Kuchiza kutentha pambuyo pa kuwotcherera nthawi zambiri sikozolowereka. Zitsulo za Austenitic zimangokhala ndi 30% ya matenthedwe amafuta azitsulo zopanda alloyed. Maphatikizidwe awo ndi otsika kuposa zitsulo zopanda alloyed choncho zitsulo za austenitic ziyenera kutenthedwa ndi kutentha kochepa kusiyana ndi zitsulo zopanda alloyed. Pofuna kupewa kutenthedwa kapena kuwotcha-kupyolera mu mapepala owonda kwambiri, liwiro la kuwotcherera liyenera kugwiritsidwa ntchito. Zipinda zam'mbuyo zamkuwa zokanira kutentha mwachangu zimagwira ntchito, pomwe, kupewa ming'alu yazitsulo za solder, sikuloledwa kuyika pamwamba-kuphatikiza mbale yamkuwa yamkuwa. Chitsulo ichi chili ndi coefficient yapamwamba kwambiri ya kukulitsa matenthedwe ngati chitsulo chosakhala ndi alloyed. Pokhudzana ndi kutentha kwapamwamba kwambiri, kusokonezeka kwakukulu kuyenera kuyembekezera. Pamene kuwotcherera 1.4539 njira zonse, amene ntchito motsutsa kupotoza izi (mwachitsanzo mmbuyo sitepe zinayendera kuwotcherera, kuwotcherera talternately mbali zosiyana ndi iwiri V butt kuwotcherera, ntchito ya welders awiri pamene zigawo zikuluzikulu mogwirizana) ayenera kulemekezedwa kwambiri. Pa makulidwe azinthu kupitilira 12mm kuwotcherera kwa V-V-butt kumayenera kukondedwa m'malo mowotcherera a single-V butt. The mbali mbali ayenera kukhala 60 ° - 70 °, pamene ntchito MIG-kuwotcherera za 50 ° ndi zokwanira. Kuchulukana kwa ma weld seams kuyenera kupewedwa. Ma welds a tack amayenera kumangirizidwa ndi mtunda waufupi kuchokera kwa wina ndi mnzake (ocheperako kwambiri kuposa awa azitsulo zopanda alloyed), kuti ateteze kupindika kolimba, kuchepa kapena kuwotcherera. Ma tackwo amayenera kupukutidwa kapena asakhale ndi ming'alu ya crater. 1.4539 yokhudzana ndi zitsulo za austenitic weld komanso kutentha kwambiri kulowetsa chizolowezi chopanga ming'alu ya kutentha kulipo. Chizoloŵezi cha ming'alu ya kutentha chikhoza kutsekedwa, ngati zitsulo zowotcherera zimakhala ndi zochepa za ferrite (delta ferrite). Zomwe zili mu ferrite mpaka 10% zimakhala ndi zotsatira zabwino ndipo sizikhudza kukana kwa dzimbiri nthawi zambiri. Zosanjikiza zoonda kwambiri zimayenera kuwotcherera (njira ya stringer bead) chifukwa kuzizira kwambiri kumachepetsa chizolowezi cha ming'alu yotentha. Kuziziritsa mwachangu komwe kumakhala koyenera kuyenera kukhutitsidwa powotchereranso, kuti tipewe chiopsezo cha dzimbiri komanso kutsekeka kwa intergranular. 1.4539 ndiyoyenera kwambiri kuwotcherera kwa laser mtengo (weldability A malinga ndi DVS bulletin 3203, gawo 3). Ndi kuwotcherera poyambira m'lifupi ang'onoang'ono kuposa 0.3mm motero 0.1mm mankhwala makulidwe ntchito filler zitsulo sikofunikira. Ndi zitsulo zazikulu zowotcherera zitsulo zofananira zofananira zitha kugwiritsidwa ntchito. Popewa makutidwe ndi okosijeni mkati mwa msoko pamwamba pa laser mtengo kuwotcherera pogwiritsa ntchito kuwotcherera ndi backhand, mwachitsanzo, helium ngati mpweya wa inert, msoko wowotcherera umakhala wosachita dzimbiri ngati chitsulo choyambira. Kuopsa kwa mng'alu wotentha kwa msoko wowotcherera kulibe, posankha njira yoyenera. 1.4539 ndi alos oyenera kudula laser mtengo maphatikizidwe ndi nayitrogeni kapena lawi kudula ndi mpweya. M'mphepete mwake muli madera ang'onoang'ono omwe amakhudzidwa ndi kutentha ndipo nthawi zambiri amakhala opanda ming'alu ya mirco ndipo amapangika bwino. Posankha njira zomwe zikuyenera kugwiritsidwa ntchito, ma fusion odulidwa amatha kusinthidwa mwachindunji. Makamaka, amatha kuwotcherera popanda kukonzekera kwina. Pamene mukukonza zida zosapanga dzimbiri zokha monga maburashi achitsulo, mapiko a pneumatic ndi zina zotero amaloledwa, kuti asawononge chiwonongekocho. Siyenera kunyalanyazidwa kuyika chizindikiro mkati mwazowotcherera msoko ndi ma bolt oleaginous kapena kutentha komwe kukuwonetsa makrayoni. Kukana kwakukulu kwa corrosions kwa chitsulo chosapanga dzimbirichi kumachokera ku mapangidwe a homogeneous, compact passive layer pamtunda. Mitundu yowonjezera, mamba, zotsalira za slag, chitsulo chopondera, spatters ndi zina zotero ziyenera kuchotsedwa, kuti zisawononge wosanjikiza. Poyeretsa pamwamba njira zotsuka, kugaya, pickling kapena kuphulika (mchenga wa silica wopanda chitsulo kapena magalasi ozungulira) angagwiritsidwe ntchito. Pakutsuka maburashi okha osapanga dzimbiri angagwiritsidwe ntchito. Kutola malo osokera m'mbuyomo kumachitika ndikumiza ndi kupopera mbewu mankhwalawa, komabe, nthawi zambiri ma pickling kapena mayankho amagwiritsidwa ntchito. Pambuyo pickling mosamala kupukuta ndi madzi zichitike.
