Chithandizo cha Kutentha kwa Martensitic Stainless Steel Castings

Chitsulo chosapanga dzimbiri cha Martensitic chimatanthawuza mtundu wachitsulo chosapanga dzimbiri chomwe microstructure yake imakhala ndi martensite. Chromium zili mu martensitic zitsulo zosapanga dzimbiri ndi mu osiyanasiyana 12% - 18%, ndi zinthu zake zazikulu alloying ndi chitsulo, chromium, faifi tambala ndi carbon.

Chitsulo chosapanga dzimbiri cha Martensitic chimatha kusintha mawonekedwe ake pogwiritsa ntchito chithandizo cha kutentha ndipo ndi mtundu wachitsulo chosapanga dzimbiri cholimba. Chitsulo chosapanga dzimbiri cha Martensitic chitha kugawidwa kukhala chitsulo cha martensitic chromium ndi chitsulo cha martensitic chromium-nickel molingana ndi nyimbo zosiyanasiyana.

 

Mawonedwe Mwachangu a Martensitic Stainless Steel
Gulu	Chitsulo chosapanga dzimbiri
Tanthauzo	Mtundu wachitsulo chosapanga dzimbiri cholimba chokhala ndi Martensitic
Kutentha Chithandizo	Kutentha, kuzizira, kutentha
Aloyi Elements	Cr, Ni, C, Mo, V
Weldability	Osauka
Maginito	Wapakati
Kapangidwe ka Micro	Makamaka Martensitic
Maphunziro Odziwika	Cr13, 2Cr13, 3Cr13
Mapulogalamu	Tsamba la turbine la nthunzi, Tableware, Zida Zopangira Opaleshoni, Zamlengalenga, Mafakitale apanyanja

 

Chitsulo chosapanga dzimbiri cha Martensitic chimatanthawuza mtundu wachitsulo chosapanga dzimbiri chomwe microstructure yake imakhala ndi martensite. Chromium zili mu martensitic zitsulo zosapanga dzimbiri ndi mu osiyanasiyana 12% - 18%, ndi zinthu zake zazikulu alloying ndi chitsulo, chromium, faifi tambala ndi carbon.

Chitsulo chosapanga dzimbiri cha Martensitic chimatha kusintha mawonekedwe ake pogwiritsa ntchito chithandizo cha kutentha ndipo ndi mtundu wachitsulo chosapanga dzimbiri cholimba. Chitsulo chosapanga dzimbiri cha Martensitic chitha kugawidwa kukhala chitsulo cha martensitic chromium ndi chitsulo cha martensitic chromium-nickel molingana ndi nyimbo zosiyanasiyana.

1. Martensitic Chromium Steel
Kuphatikiza pa chromium, chitsulo cha martensitic chromium chilinso ndi kuchuluka kwa kaboni. Zomwe zili mu chromium zimatsimikizira kukana kwa chitsulo. Kuchuluka kwa mpweya wa carbon, kumapangitsanso mphamvu, kuuma ndi kukana kuvala. Mapangidwe abwino a zitsulo zamtundu uwu ndi martensite, ndipo ena amakhalanso ndi austenite, ferrite kapena pearlite pang'ono. Amagwiritsidwa ntchito makamaka popanga zigawo, zigawo, zida, mipeni, ndi zina zotero zomwe zimafuna mphamvu zambiri ndi kuuma, koma sizifuna kukana kwa dzimbiri. Makalasi odziwika bwino achitsulo ndi 2Crl3, 4Crl3, 9Crl8, etc.

2. Martensitic Chromium-Nickel chitsulo
Chitsulo cha chromium-nickel cha Martensitic chimaphatikizapo mvula yowumitsa chitsulo chosapanga dzimbiri, mvula yowumitsa zitsulo zosapanga dzimbiri komanso zitsulo zosapanga dzimbiri, ndi zina zotere, zonsezo ndi zitsulo zosapanga dzimbiri zolimba kwambiri kapena zokulirapo kwambiri. Chitsulo chamtunduwu chimakhala ndi mpweya wochepa (ochepera 0.10%) ndipo chimakhala ndi faifi tambala. Magiredi ena amakhalanso ndi zinthu zapamwamba monga molybdenum ndi mkuwa. Chifukwa chake, chitsulo chamtunduwu chimakhala ndi mphamvu yayikulu, ndikuphatikiza mphamvu ndi kulimba komanso kukana dzimbiri. Magwiridwe, weldability, etc. ndi bwino kuposa martensitic chromium chitsulo. Crl7Ni2 ndi chitsulo chosapanga dzimbiri chomwe chimagwiritsidwa ntchito kwambiri ndi nickel martensitic.

Martensitemvula kuumitsa zosapanga dzimbirizitsulo nthawi zambiri zimakhalanso ndi Al, Ti, Cu ndi zinthu zina. Imatsitsa Ni3A1, Ni3Ti ndi magawo ena olimbikitsa kubalalitsidwa pa matrix a martensite kudzera pakuuma kwa mvula kupititsa patsogolo mphamvu yachitsulo. Semi-austenite (kapena theka-martensitic) mpweya kuumitsa zitsulo zosapanga dzimbiri, chifukwa boma kuzimitsidwa akadali austenite, kotero boma kuzimitsidwa akhoza kukhala ozizira ntchito ndiyeno kulimbikitsidwa ndi mankhwala wapakatikati, ukalamba mankhwala ndi njira zina. Mwa njira iyi, austenite mu martensitic mpweya kuumitsa zitsulo zosapanga dzimbiri akhoza mwachindunji kusandulika martensite pambuyo quenching, zomwe zimabweretsa kuipa kwa zovuta processing wotsatira ndi kupanga. Zomwe zimagwiritsidwa ntchito kwambiri ndizitsulo ndi 0Crl7Ni7AI, 0Crl5Ni7M02A1 ndi zina zotero. Chitsulo chamtunduwu chimakhala ndi mphamvu zambiri, nthawi zambiri chimafika 1200-1400 MPa, ndipo nthawi zambiri chimagwiritsidwa ntchito popanga zida zomangira zomwe sizimafuna kukana kwa dzimbiri koma zimafuna mphamvu zambiri.

Njira yochizira kutentha yomwe imagwiritsidwa ntchito kwambiri pazitsulo zosapanga dzimbiri za martensitic ndikuzimitsa komanso kutenthetsa. Nthawi zambiri kusankha kuziziritsa mu mafuta kapena mpweya pa kutentha 950-1050 ℃. Kenako kutentha kwa 650-750 ° C. Kawirikawiri, iyenera kutenthedwa mwamsanga mutatha kuzimitsa kuti zisawonongeke kuti zisawonongeke chifukwa cha kupsinjika kwa dongosolo lozimitsidwa.

Zopangira zitsulo zosapanga dzimbiri zokhala ndi faifi tambala pang'ono, molybdenum, silicon ndi zinthu zina zophatikizika zimakhala ndi zida zamakina, zowotcherera komanso kukana pambuyo pokhazikika komanso kutentha. Kuponyedwa kotereku kumagwiritsidwa ntchito kwambiri pakuponyera ndi kuponyera + zowotcherera za ma turbine akuluakulu a hydraulic. Pankhaniyi, kutentha mankhwala specifications zambiri amasankhidwa normalizing pa 950 - 1050 ℃ ndi kutentha pa 600 -670 ℃.