輻射加熱管是把電加熱元件封閉在保護套內通電發熱,由套管間接把熱量輻射給爐襯和被處理工件,廣泛應用于熱處理行業的各種加熱爐中。
輻射(she)加(jia)(jia)熱(re)(re)(re)(re)管,是把(ba)電加(jia)(jia)熱(re)(re)(re)(re)元件封(feng)閉(bi)在(zai)保護套內通電發熱(re)(re)(re)(re),由(you)套管間接把(ba)熱(re)(re)(re)(re)量輻射(she)給爐(lu)襯和被處(chu)理工件,紅外輻射(she)加(jia)(jia)熱(re)(re)(re)(re)管廣泛應用(yong)于熱(re)(re)(re)(re)處(chu)理行(xing)業的各(ge)種加(jia)(jia)熱(re)(re)(re)(re)爐(lu)中(zhong)。
輻射加熱(re)(re)(re)管(guan)(guan)使(shi)用的(de)電(dian)熱(re)(re)(re)合金材料(liao)應具(ju)有(you)較高(gao)(gao)的(de)電(dian)阻率,電(dian)熱(re)(re)(re)轉化率高(gao)(gao)。由于(yu)輻射管(guan)(guan)放(fang)置在套管(guan)(guan)內(nei),傳熱(re)(re)(re)過(guo)程與一般敞露型電(dian)熱(re)(re)(re)元(yuan)件(jian)(jian)不(bu)同(tong),其(qi)熱(re)(re)(re)屏蔽大,升溫(wen)(wen)(wen)過(guo)程中(zhong)必須(xu)對(dui)元(yuan)件(jian)(jian)溫(wen)(wen)(wen)度進(jin)行控(kong)制,防(fang)止(zhi)元(yuan)件(jian)(jian)超溫(wen)(wen)(wen)。輻射管(guan)(guan)封(feng)閉加熱(re)(re)(re)時,電(dian)熱(re)(re)(re)元(yuan)件(jian)(jian)表面溫(wen)(wen)(wen)度比爐膛溫(wen)(wen)(wen)度高(gao)(gao)約100℃-150℃。所以在選(xuan)材時要分析(xi)爐溫(wen)(wen)(wen)、爐內(nei)氣溫(wen)(wen)(wen)氛(fen)圍,選(xuan)擇正確的(de)加熱(re)(re)(re)材料(liao)。
目前輻射管加(jia)熱(re)管系列(lie)有(you)(you)鼠籠式(shi)(shi)、立帶式(shi)(shi)和螺旋式(shi)(shi)等,加(jia)熱(re)元件(jian)系采用(yong)(yong)進(jin)(jin)口或國產電阻絲(si)、鎳鉻絲(si)(或帶)、鐵鉻鋁(絲(si)或帶),保護管采用(yong)(yong)進(jin)(jin)口高溫(wen)合金板(ban)材(cai)、耐熱(re)鋼(gang)板(ban)卷(juan)制焊接(jie)或離心鑄造而成,具有(you)(you)高溫(wen)抗(kang)氧(yang)化(hua)性(xing)和抗(kang)滲(shen)碳(tan)性(xing)能好、使用(yong)(yong)壽(shou)命長等特(te)點(dian)。