Kuponyera m'malo opindika kapena owongoka kumapangitsanso vuto lakuthwa m'mphepete panthawi yakusintha kwa pickling.chitoliro chopanda msoko.
0Cr15mm9Cu2nin ndi 0Cr17Mm6ni4Cu2N zitsulo zosapanga dzimbiri ndi 200 mndandanda austenitic zitsulo zosapanga dzimbiri, zomwe ndi zosiyana ndi miyambo 200 mndandanda ndi 300 mndandanda austeniticchitsulo chosapanga dzimbiri. Mtundu uwu200zitsulo zosapanga dzimbiri lalikulu chubusachedwa ming'alu ya m'mphepete, ming'alu yapamtunda, Vuto la kuwonongeka kosauka kwa m'mphepete. Pakupanga kotentha kwenikweni, mitundu iwiri yazitsulo imatenga ma 200 ma curve otentha, ndipo kutentha kwa ng'anjo kumayendetsedwa pa 1215-1230C. Dongosolo lake lotentha limagwiritsa ntchito mtundu wachiwiri wapakompyuta wa "Rough Rolling Regulations" ndi "Finish Rolling Regulations". 800-1020C. Kunena zenizeni otentha anagubuduza ndondomeko awiri picklingchitoliro chopanda msoko, pangani matenthedwe otenthetsera ndi kutentha kwa njira yoyeserayi, ndiyeno tsatirani mayeso oyeserera otentha pa chipangizo choyezera chotentha chopangidwa ndikupangidwa ndi tokha. Zambiri zamasiku ano za mgwirizano wa chitoliro cha square: kugwiritsa ntchito njira yoyenga ya AOD+LF kuti ipange 0Cr15Mm9Cu2Nn ndi 0Cr17I6ni4Cu2N pickling yopanda mitsempha mosalekeza kuponya koyipa mosalekeza kudzera mukupindika kosalekeza, kukula kwapang'onopang'ono kwa kuponyera kosalekeza ndi 12220m. Gawo lalikulu % likuwonetsedwa patebulo. The microstructure wa chipolopolo zoipa pa kuya osiyana 0Cr15m9Cu2Nn asidi-osambitsidwa sanali mitsempha mosalekeza kuponyera, monga momwe chithunzi, limafanana ndi kuya kwa kuponyedwa zoipa chipolopolo. Pamene vuto lachilendo likuchitika ndipo kutentha kwa m'mphepete mwa kuponyera kumalephera kutsika kumtunda wochepa kwambiri. The microstructure pa 15 ndi 25m. Maonekedwe a microstructure ndi kukula kwa tirigu wa chubu cha 20g high-pressure boiler chubu chidzawonjezeka ndi kuya kwa chipolopolo cha slab. Zosintha, koma zikuwonetsa kusiyana kwina. Pa kuya kwa chipolopolo cha d0m, mawonekedwe ang'onoang'ono amakhala opangidwa ndi skeleton-mtundu wa dendrite, ndipo malo oyambira ndi achiwiri a dendrite ndi ochepa. Pa d5mm, makamaka mawonekedwe a dendrite.
Kutalika kwa dendrite ndi kwakukulu. Pa d> 15mn, ma dendrites amakhala ngati nyongolotsi, koma pa d25m, amakhala makamaka makristasi am'manja. The microstructure ya Cr17Im6ni4Cu2N square chubu mosalekeza kuponyera slab mu Mkuyu. Ngakhale pali kusiyana kwina kwa dendrite morphology, kapangidwe kake kamakhala kopangidwa ndi imvi austenite matrix, ndi ferrite yakuda. Monga chubu lalikulu la 0Cr15Mn9Cu2Nin, kuya kwa chipolopolo kumawonjezeka, malo oyambira ndi achiwiri a dendrite amawonjezeka pang'onopang'ono, ndipo mawonekedwe a dendrite amasintha kuchokera ku chigoba kupita ku nyongolotsi. , khalidwe pulasitiki mu ndondomeko martensitic gawo kusintha mu kuvala zosagwira gulu mipope zitsulo anali experimentally kusanthula, ndi austenite tirigu kukula ndi austenite mbewu kukula lamulo, martensite orientation, gawo kusintha plasticity, Zotsatira za kupsinjika maganizo ndi morphology pa makina katundu. a mapaipi achitsulo osamva kuvala. Pansi pa kutentha 1010 austenitization 15mir, chiyambi kutentha mfundo s ndi mapeto kutentha mfundo ㎡ wa martensitic kusintha kuwonjezeka ndi kuwonjezeka kwa kutentha austenitization, ndi magawo mu gawo kusintha pulasitiki chitsanzo cha kuvala zosagwira gulu zitsulo chitoliro kusintha ndi kuwonjezeka ndi kuchulukitsa kupsinjika kofanana. Pamene kutentha kwa austenitization kumakhala kotsika kuposa 1050C, kukula kwambewu kumawonetsa kukula kwabwinobwino. Ndi kuwonjezeka kwa nthawi ya austenitization, zitsulo zozungulira zimawonjezeka. -3500 matenthedwe simulator, khalidwe la pulasitiki la kuvala zosagwira gulu zitsulo chitoliro pa martensitic kusintha ndondomeko anali experimentally kusanthula, ndi austenite tirigu kukula ndi austenite mbewu kukula malamulo anaphunzira, ndi martensite Zotsatira za orientation, gawo kusintha plasticity, kupsinjika ndi morphology pamakina amapaipi achitsulo osamva kuvala. Pansi pa chikhalidwe cha 1010 austenitization kwa mphindi 15, chiyambi kutentha mfundo s ndi mapeto kutentha mfundo ㎡ wa martensitic kusintha kuwonjezeka ndi kuwonjezeka austenitization kutentha, ndi chizindikiro K mu gawo kusintha plasticity chitsanzo cha kuvala zosagwira gulu zitsulo chitoliro kumawonjezera ndi kupsinjika kofanana. Kutentha kwa austenitizing kumakhala kotsika kuposa 1050C, kukula kwambewu kumawonetsa kukula kwabwinobwino. Pamene nthawi ya austenitizing ikuwonjezeka, imawonjezeka, ndipo kusintha kwa gawo la B kumagawidwa m'malire a tirigu. Ma nucleation ndi kukula kwa magawo ndi Pali magawo awiri a nucleation ndi kukula kwa Widmanite a. gawo. Pamene kuzizira kumawonjezeka kuchokera ku 0.1C / s kufika ku 150C / s, kusintha kwa gawo la B + a ndi + makamaka kumachitika mu Ti-55 alloy. Mbewu zapaipi yachitsulo yosamva kuvala imatha kukhalabe yunifolomu komanso yaying'ono, ndipo ma carbides a Fine coherent complex adawomberedwa pamwamba. Kugwiritsa ntchito ma microscope ma electron, kuyang'ana maikulosikopu a electron, x-ray diffractometer ndi njira zamagetsi kuti muphunzire za microstructure ndi electrochemical katundu wa aloyi achitsulo osamva kuvala m'madera osiyanasiyana monga cast state, homogenized state, ndi galimoto, ndi electron probe EPM The morphology ndi kapangidwe ka ma precipitates akulu mu chitoliro chachitsulo chosamva kuvala cholumikizidwa pa 150-300C adafufuzidwa ndi kuwunika kwa sipekitiramu yamagetsi.
Nthawi yotumiza: Mar-30-2023