真(zhen)(zhen)(zhen)空(kong)(kong)速(su)凝(ning)爐(lu)(lu)(lu)冶(ye)煉(lian)的工藝操作(zuo)***是什么
真(zhen)(zhen)(zhen)空(kong)(kong)速(su)凝(ning)爐(lu)(lu)(lu)冶(ye)煉(lian)的工藝操作(zuo)***是什么?歸納起(qi)來冶(ye)煉(lian)的工藝操作(zuo)***有下(xia)列幾點。
(1)原(yuan)材(cai)料的準備要精(jing)(jing)細(xi)
真(zhen)(zhen)(zhen)空(kong)(kong)速(su)凝(ning)爐(lu)(lu)(lu)冶(ye)煉(lian)所用(yong)(yong)原(yuan)材(cai)料的化(hua)(hua)(hua)學純度(du)(du)(du)(du)(du)(du)(du)、清潔(jie)度(du)(du)(du)(du)(du)(du)(du)、塊度(du)(du)(du)(du)(du)(du)(du)和(he)(he)干燥程(cheng)(cheng)度(du)(du)(du)(du)(du)(du)(du)要符合技(ji)術要求。爐(lu)(lu)(lu)料要精(jing)(jing)、準備要細(xi)致。
(2)保(bao)(bao)持熔(rong)化(hua)(hua)(hua)過程(cheng)(cheng)順利(li)進(jin)行
爐(lu)(lu)(lu)料的熔(rong)化(hua)(hua)(hua)速(su)度(du)(du)(du)(du)(du)(du)(du)應(ying)(ying)逐(zhu)步加(jia)(jia)快,加(jia)(jia)熱(re)功率逐(zhu)步升高,保(bao)(bao)證爐(lu)(lu)(lu)料順利(li)熔(rong)化(hua)(hua)(hua)、充(chong)(chong)分脫(tuo)氣。熔(rong)化(hua)(hua)(hua)中后期(qi)可適當增大加(jia)(jia)熱(re)功率、加(jia)(jia)快熔(rong)化(hua)(hua)(hua)速(su)度(du)(du)(du)(du)(du)(du)(du)縮短熔(rong)化(hua)(hua)(hua)時間。
(3)控(kong)制鋼(gang)(gang)液(ye)(ye)沸騰(teng)(teng)(teng)強(qiang)度(du)(du)(du)(du)(du)(du)(du),發揮(hui)沸騰(teng)(teng)(teng)的精(jing)(jing)煉(lian)作(zuo)用(yong)(yong)
熔(rong)化(hua)(hua)(hua)末期(qi)和(he)(he)精(jing)(jing)煉(lian)初(chu)期(qi)應(ying)(ying)充(chong)(chong)分發揮(hui)沸騰(teng)(teng)(teng)的脫(tuo)氧、脫(tuo)氮、脫(tuo)氫(qing)和(he)(he)去除(chu)夾(jia)雜物的作(zuo)用(yong)(yong)。但是,應(ying)(ying)通過用(yong)(yong)氬(ya)氣調控(kong)其(qi)沸騰(teng)(teng)(teng)強(qiang)度(du)(du)(du)(du)(du)(du)(du),減輕對(dui)坩(gan)堝的沖刷和(he)(he)防止鋼(gang)(gang)液(ye)(ye)外溢(yi)事故。
(4)各個時期(qi)要保(bao)(bao)持高的真(zhen)(zhen)(zhen)空(kong)(kong)度(du)(du)(du)(du)(du)(du)(du)
裝(zhuang)料完畢合爐(lu)(lu)(lu)后要抽(chou)至高真(zhen)(zhen)(zhen)空(kong)(kong)度(du)(du)(du)(du)(du)(du)(du)≦10Pa方(fang)可送電(dian)加(jia)(jia)熱(re)。熔(rong)化(hua)(hua)(hua)之前(qian)應(ying)(ying)保(bao)(bao)持較高的真(zhen)(zhen)(zhen)空(kong)(kong)度(du)(du)(du)(du)(du)(du)(du)。精(jing)(jing)煉(lian)期(qi)應(ying)(ying)保(bao)(bao)持高溫、高真(zhen)(zhen)(zhen)空(kong)(kong),完成(cheng)脫(tuo)氧和(he)(he)去除(chu)有害雜質。合金(jin)化(hua)(hua)(hua)期(qi)應(ying)(ying)在高真(zhen)(zhen)(zhen)度(du)(du)(du)(du)(du)(du)(du)下(xia)充(chong)(chong)人氬(ya)氣,以減少易氧化(hua)(hua)(hua)元(yuan)素的氧化(hua)(hua)(hua)損失。
(5)合金(jin)化(hua)(hua)(hua)期(qi)要充(chong)(chong)氬(ya)降溫加(jia)(jia)入(ru)易氧化(hua)(hua)(hua)元(yuan)索(suo)
在真(zhen)(zhen)(zhen)空(kong)(kong)度(du)(du)(du)(du)(du)(du)(du)為(wei)1.0~0.5Pa時,向真(zhen)(zhen)(zhen)空(kong)(kong)速(su)凝(ning)爐(lu)(lu)(lu)內充(chong)(chong)入(ru)氬(ya)氣。停(ting)電(dian)降溫加(jia)(jia)入(ru)合金(jin)元(yuan)素,熔(rong)化(hua)(hua)(hua)后立即攪拌鋼(gang)(gang)液(ye)(ye),使合金(jin)元(yuan)素分布均勻。
(6)合金(jin)化(hua)(hua)(hua)末期(qi)的加(jia)(jia)鎂(mei)操作(zuo)
加(jia)(jia)鎂(mei)時要嚴格(ge)按照加(jia)(jia)鎂(mei)工藝的規定(ding)進(jin)行操作(zuo)。在真(zhen)(zhen)(zhen)空(kong)(kong)速(su)凝(ning)爐(lu)(lu)(lu)爐(lu)(lu)(lu)型、冶(ye)煉(lian)工藝、加(jia)(jia)鎂(mei)條件(jian)確定(ding)后,應(ying)(ying)嚴格(ge)按照規定(ding)的氬(ya)氣壓強(qiang)、鋼(gang)(gang)液(ye)(ye)溫度(du)(du)(du)(du)(du)(du)(du)、保(bao)(bao)持時間進(jin)行操作(zuo)。