konstruirovanie litix detaley
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lektsiya 7. konstruirovanie litix detaley 7.1. tolshina stenok i prochnost otlivok 7.2. konstruktsiya otlivki dlya izgotovleniya formi 7.3. otkritie otlivki. otlivki, formuemie s pomoshyu sterjney 7.1. tolshina stenok i prochnost otlivok stenki litix detaley obladayut neodinakovoy prochnostyu v poperechnom sechenii iz-za razlichiya usloviy kristallizatsii. prochnost maksimalna v poverxnostnom sloe, gde metall vsledstvie povishennoy skorosti oxlajdeniya priobretaet melkokristallicheskuyu strukturu i gde obrazuyutsya blagopriyatnie dlya prochnosti ostatochnie napryajeniya sjatiya. v poverxnostnom sloe chugunnix otlivok preobladayut perlit i tsementit. serdtsevina, zastivayushaya medlennee, imeet krupnokristallicheskoe stroenie s preobladaniem ferrita i grafita. v ney neredko obrazuyutsya den...
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