Halayen Manyan Forgings (1)

Dangane da ayyukan masana'antu a ɓangaren injina masu nauyi, ƙirƙira kyauta da aka samar ta amfani da injin injin ruwa tare da ƙarfin ƙirƙira sama da ton 1000 ana iya kiransa babban ƙirƙira.Dangane da ƙarfin ƙirƙira na injin matsi na ruwa don ƙirƙira kyauta, wannan yayi daidai da juzu'in juzu'in sama da tan 5 da ƙirjin fayafai masu nauyi sama da tan 2.

Babban mahimmancin halaye na manyan ƙirƙira shine babban girman su da nauyi mai nauyi.Misali, girman 600MW turbine janareta rotor ƙirƙira ne φ1280mm × 16310mm, yin la'akari 111.5 ton.Girman 2200-2400MW turbine janareta rotor ƙirƙira ne φ1808mm × 16880mm, yin la'akari 247 ton.

Saboda girman girmansu da nauyinsu, dole ne a ƙirƙira manyan jabu daga manyan ingots na ƙarfe kai tsaye.Sanannen abu ne cewa manyan ingots na karfe galibi suna da manyan batutuwa kamar su rarrabuwa, porosity, shrinkage, abubuwan da ba na ƙarfe ba, da nau'ikan nau'ikan tsarin rashin daidaituwa.Har ila yau, suna da babban abun ciki na iskar gas, kuma waɗannan lahani suna da wuyar cirewa yayin ayyukan ƙirƙira na gaba.A sakamakon haka, mahimman abubuwan da ke tattare da sinadarai marasa daidaituwa, lahani iri-iri, da manyan abubuwan da ke tattare da iskar gas mai cutarwa galibi suna wanzuwa a cikin manyan ƙirƙira.Wannan ya sa tsarin kula da zafi don manyan ƙirƙira mai rikitarwa, mai cin lokaci, da tsada.Sabili da haka, dole ne a kula da hankali yayin maganin zafi.

Bugu da ƙari kuma, saboda girman girman su da nauyin su, manyan ƙirƙira suna da ƙarfin zafi mai mahimmanci, wanda ya sa ba zai yiwu a cimma babban zafi da sanyi ba yayin matakan maganin zafi.Sabili da haka, don manyan ƙirƙira waɗanda ke buƙatar manyan canje-canje a cikin tsarin ciki ta hanyar zafin rai ko kashewa don saduwa da babban aiki da buƙatun inganci, dole ne a yi amfani da ƙarfe mai ƙarfi mai ƙarfi da kwanciyar hankali.Misalai sun haɗa da Ni-Cr-Mo, Ni-Mo-V, da Ni-Cr-Mo-V jerin karafu.Koyaya, karafa tare da babban kwanciyar hankali na supercooled austenite suna da saurin kamuwa da tsarin gado, wanda ke haifar da ƙarancin ƙima da girman hatsi a cikin ingantattun ƙarfe na gami.Don magance wannan batu, ana buƙatar hanyoyin magance zafi na musamman da hadaddun.

Idan kuna buƙatar ƙarin bayani game da WELONG ƙirƙira don injin turbi da janareta, da yardar rai ku tuntuɓi