Crucible preheating da bushewa hanyar magani don buffer modulated kalaman aluminum narkewa tanderu

Kafin amfani da sabon crucible a karon farko, yana da kyau a preheat da graphite crucible na 4-24 hours.

Kafin yin amfani da sabon ƙwanƙwasa, idan zai yiwu, sanya itacen a cikin kullun don ƙonewa na tsawon sa’o’i 2-4, wanda ke taimakawa wajen dehumidification na crucible.

1 dumama da preheating a cikin sabon crucible tanderun ne kamar haka:

Cracks suna bayyana a cikin crucible, galibi kafin digiri 200. Ya kamata a biya kulawa ta musamman don kada kuyi gaggawa, amma a hankali yana haɓaka yawan zafin jiki tare da matsakaicin matsakaici. Crucible yana da tsarin daidaitawa. Ajiye zafin jiki a 150 ° C na akalla sa’o’i 2, cire tururin ruwa sosai, bushewa da sauri ko dumama a matsakaicin iko, wanda zai sa kullun ya fashe. Gishiri yana gudanar da zafi da sauri, kuma ana yin aikin preheating. Lokacin da crucible ya kai digiri 300, zai iya yin zafi da sauri, kuma ba zai fashe ba.

A. Zazzabi na dakin yana tashi zuwa 100 ° C, dumama halin yanzu shine 15A, tukunyar da ba ta da komai tana mai zafi zuwa 100 ° C ba tare da murfi ba, kuma ana kiyaye zafin jiki na 2h;

B. Tada zafin jiki daga 100 ℃ zuwa 200 ℃, dumama halin yanzu ne 20A, fanko tukunya ne mai tsanani zuwa 200 ℃ ba tare da murfi, da kuma yawan zafin jiki ne m ga 2h;

C. Tada 200 ℃ zuwa 300 ℃, dumama halin yanzu 30A, da komai crucible ne mai tsanani zuwa 300 ℃ ba tare da murfi, m zafin jiki na 1h;

D. Ƙara yawan zafin jiki daga 300 ° C zuwa 800 ° C, zafi sama a cikakken kaya, rufe kullun maras kyau da zafi har zuwa 800 ° C, ci gaba da yawan zafin jiki na 1h;

A wannan lokacin, sai a sanya busassun kananan tarkacen aluminum, sannan a hankali a zuba aluminium ingots tare da rabin tukunyar ruwa na aluminum. Yanayin zafin jiki na sama yana nufin zafin wutar lantarki (cikin tanderun).

Note: The dumama kudi ne har zuwa 400 ℃ / hour. Preheating yana nufin cewa ba za a ɗora ƙugiya ba har sai ya zama ja, kuma ƙullun dole ne ya bushe.

2 Bayan dakatar da tanderun, ɗora miya kamar yadda zai yiwu, rufe murfin tanderun, kuma rufe tasoshin. Don kula da saura zafin jiki.

3 Bayan dakatar da tanderun, lokacin da ake amfani da crucible kuma, lura da tsarin yin burodi mai zuwa.

Idan an rufe tanderun na kwanaki 1-3, danna preheating ABC don kasancewa ba canzawa, kuma zafi crucible har sai crucible yayi ja, sa’an nan kuma ƙara busassun kayan aluminium mai kyau.

Idan an rufe tanderun sama da kwanaki 7, yi aiki azaman farkon fara zafi na sabon tukunya.

4 Lokacin da aka buɗe sabon crucible don dubawa kuma ba a amfani da shi ba, yakamata a haɗa shi a cikin hatiminsa na asali kuma kada a sanya shi a cikin tanderun narkewar almuran da aka ƙera don gujewa damp. Idan crucible yana da damp a lokacin amfani, ya kamata a motsa shi ta hanyar tanderun don preheat na tsawon sa’o’i 8-24 , Kuma sanya itace a cikin kullun don ƙonewa don 2-4 hours, sa’an nan kuma preheat bisa ga hanyar da aka sama.