輻射加熱管概況
輻射加(jia)熱(re)(re)(re)管,是(shi)把(ba)電(dian)加(jia)熱(re)(re)(re)元(yuan)件(jian)封(feng)閉在保護套內通電(dian)發(fa)熱(re)(re)(re),由套管間接把(ba)熱(re)(re)(re)量輻射給爐(lu)襯(chen)和(he)被處理(li)工件(jian),紅外輻射加(jia)熱(re)(re)(re)管廣泛應(ying)用于熱(re)(re)(re)處理(li)行業的各種加(jia)熱(re)(re)(re)爐(lu)中(zhong)。
輻(fu)射加(jia)熱(re)(re)(re)(re)管使用(yong)的電(dian)(dian)(dian)熱(re)(re)(re)(re)合(he)金材料應(ying)具有較(jiao)高的電(dian)(dian)(dian)阻率,電(dian)(dian)(dian)熱(re)(re)(re)(re)轉(zhuan)化(hua)率高。由于輻(fu)射管放置在套(tao)管內,傳(chuan)熱(re)(re)(re)(re)過(guo)程與一般敞露型電(dian)(dian)(dian)熱(re)(re)(re)(re)元(yuan)件(jian)(jian)不同,其熱(re)(re)(re)(re)屏蔽大,升(sheng)溫過(guo)程中(zhong)必(bi)須對元(yuan)件(jian)(jian)溫度進(jin)行控制,防止元(yuan)件(jian)(jian)超溫。輻(fu)射管封閉加(jia)熱(re)(re)(re)(re)時(shi),電(dian)(dian)(dian)熱(re)(re)(re)(re)元(yuan)件(jian)(jian)表面溫度比爐膛(tang)溫度高約100℃-150℃。所以在選材時(shi)要分析爐溫、爐內氣(qi)溫氛圍,選擇(ze)正確的加(jia)熱(re)(re)(re)(re)材料。
目前輻射管加(jia)熱(re)管系(xi)列有(you)鼠籠式(shi)、立帶式(shi)和(he)螺(luo)旋(xuan)式(shi)等,加(jia)熱(re)元件(jian)系(xi)采用進口(kou)或(huo)(huo)國產電阻絲、鎳(nie)鉻(ge)絲(或(huo)(huo)帶)、鐵鉻(ge)鋁(絲或(huo)(huo)帶),保護管采用進口(kou)高(gao)溫(wen)合金板(ban)材、耐(nai)熱(re)鋼板(ban)卷(juan)制焊接或(huo)(huo)離心鑄(zhu)造而(er)成(cheng),具有(you)高(gao)溫(wen)抗氧化性和(he)抗滲碳(tan)性能(neng)好、使用壽命長等特點。