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Old 04-02-2015, 11:49 AM   #11
psionic
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Join Date: Jan 2008
Location: Beograd
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Default Re: Lemilica

Quote:
Originally Posted by vasko View Post
Hladan lem nastaje kada kontakti koje lemis nisu dovoljno zagrejani da bi kalaj uhvatio za njih vec je samo kalaj istopljen, tj formira se samo mehanicka veza ali ne i hemijska. Zato se snaga lemilice bira prema masi kontakata koji se leme i tom prilikom temperatura kontakata mora biti iznad tacke topljenja kalaja.
Slažem se sa ovim, a ima tu i kakav je kalaj korišćen (procenat olova i sl), a ima i pojava da se posle više grejanja i hladjenja, da se pojave pukotine, čak i kod fabričkih lemova. Primer je memorija na grafičkoj.
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