真(zhen)(zhen)(zhen)空(kong)(kong)(kong)熔(rong)煉(lian)(lian)(lian)(lian)爐(lu)(lu)冶煉(lian)(lian)(lian)(lian)的(de)(de)(de)(de)優點(dian)(dian)是什么
真(zhen)(zhen)(zhen)空(kong)(kong)(kong)熔(rong)煉(lian)(lian)(lian)(lian)爐(lu)(lu)冶煉(lian)(lian)(lian)(lian)是在負壓條件下(xia)進(jin)行爐(lu)(lu)料的(de)(de)(de)(de)加(jia)熱、熔(rong)化(hua)、精(jing)煉(lian)(lian)(lian)(lian)、合(he)(he)金(jin)(jin)(jin)化(hua)和澆注的(de)(de)(de)(de)煉(lian)(lian)(lian)(lian)鋼(gang)方(fang)法。具(ju)有(you)以(yi)(yi)下(xia)優點(dian)(dian)。
(1)精(jing)確的(de)(de)(de)(de)控(kong)制合(he)(he)金(jin)(jin)(jin)的(de)(de)(de)(de)化(hua)學成分
由于冶煉(lian)(lian)(lian)(lian)的(de)(de)(de)(de)全過(guo)(guo)程(cheng)是在隔離大(da)氣的(de)(de)(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)下(xia)進(jin)行的(de)(de)(de)(de),因此真(zhen)(zhen)(zhen)空(kong)(kong)(kong)熔(rong)煉(lian)(lian)(lian)(lian)爐(lu)(lu)減(jian)(jian)少了(le)合(he)(he)金(jin)(jin)(jin)元(yuan)(yuan)素(su)(su)(su)的(de)(de)(de)(de)氧(yang)(yang)(yang)化(hua)損(sun)失(shi),加(jia)之鋼(gang)液(ye)中(zhong)含(han)(han)氧(yang)(yang)(yang)量(liang)(liang)(liang)很(hen)(hen)低,大(da)大(da)提高(gao)了(le)合(he)(he)金(jin)(jin)(jin)元(yuan)(yuan)素(su)(su)(su)的(de)(de)(de)(de)回(hui)收率。從而可(ke)(ke)以(yi)(yi)精(jing)確的(de)(de)(de)(de)控(kong)制化(hua)學成分。
(2)由于冶煉(lian)(lian)(lian)(lian)過(guo)(guo)程(cheng)在真(zhen)(zhen)(zhen)空(kong)(kong)(kong)下(xia)進(jin)行、冶煉(lian)(lian)(lian)(lian)合(he)(he)金(jin)(jin)(jin)中(zhong)氣體(ti)含(han)(han)量(liang)(liang)(liang)很(hen)(hen)低。真(zhen)(zhen)(zhen)空(kong)(kong)(kong)下(xia)利(li)用(yong)碳(tan)對(dui)鋼(gang)液(ye)進(jin)行脫(tuo)氧(yang)(yang)(yang)和在真(zhen)(zhen)(zhen)空(kong)(kong)(kong)下(xia)澆注避(bi)免了(le)二次氧(yang)(yang)(yang)化(hua)。這些優越條件使冶煉(lian)(lian)(lian)(lian)鋼(gang)中(zhong)氣體(ti)與夾雜物(wu)含(han)(han)量(liang)(liang)(liang)低,大(da)大(da)提高(gao)了(le)鋼(gang)的(de)(de)(de)(de)純凈度(du)。
(3)降低鋼(gang)中(zhong)微(wei)量(liang)(liang)(liang)有(you)害(hai)雜質(zhi)含(han)(han)量(liang)(liang)(liang)
微(wei)量(liang)(liang)(liang)雜質(zhi)元(yuan)(yuan)素(su)(su)(su)鉛、砷、錫、銻、鉍等,對(dui)高(gao)溫(wen)合(he)(he)金(jin)(jin)(jin)的(de)(de)(de)(de)熱加(jia)工塑性和高(gao)溫(wen)強(qiang)度(du)帶來極(ji)明顯的(de)(de)(de)(de)危(wei)害(hai)。利(li)用(yong)微(wei)量(liang)(liang)(liang)雜質(zhi)元(yuan)(yuan)素(su)(su)(su)高(gao)蒸汽壓的(de)(de)(de)(de)特點(dian)(dian),通過(guo)(guo)高(gao)溫(wen)和高(gao)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)可(ke)(ke)以(yi)(yi)有(you)效去除雜質(zhi)元(yuan)(yuan)素(su)(su)(su),減(jian)(jian)弱其危(wei)害(hai)作用(yong)。
(4)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)熔(rong)煉(lian)(lian)(lian)(lian)爐(lu)(lu)冶煉(lian)(lian)(lian)(lian)的(de)(de)(de)(de)工藝(yi)參數可(ke)(ke)調性強(qiang)
通過(guo)(guo)對(dui)冶煉(lian)(lian)(lian)(lian)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)度(du)、溫(wen)度(du)、精(jing)煉(lian)(lian)(lian)(lian)時間(jian)以(yi)(yi)及真(zhen)(zhen)(zhen)空(kong)(kong)(kong)燒結爐(lu)(lu)內氣氛等因素(su)(su)(su)的(de)(de)(de)(de)配合(he)(he)與調節,可(ke)(ke)以(yi)(yi)達(da)到許(xu)多的(de)(de)(de)(de)精(jing)煉(lian)(lian)(lian)(lian)目的(de)(de)(de)(de)。這方(fang)面其工藝(yi)靈活性遠(yuan)遠(yuan)超過(guo)(guo)中(zhong)頻感應爐(lu)(lu)冶煉(lian)(lian)(lian)(lian)。例如,真(zhen)(zhen)(zhen)空(kong)(kong)(kong)熔(rong)煉(lian)(lian)(lian)(lian)爐(lu)(lu)冶煉(lian)(lian)(lian)(lian)在鋼(gang)液(ye)脫(tuo)碳(tan)、脫(tuo)氧(yang)(yang)(yang)、脫(tuo)氮、揮發去除雜質(zhi)元(yuan)(yuan)素(su)(su)(su)、減(jian)(jian)少易(yi)氧(yang)(yang)(yang)化(hua)元(yuan)(yuan)素(su)(su)(su)燒損(sun)、減(jian)(jian)少夾雜物(wu)含(han)(han)量(liang)(liang)(liang)等方(fang)面均(jun)具(ju)有(you)優勢。