輻射加熱管概況

輻(fu)(fu)射(she)(she)加熱管，是把電加熱元件封閉在保護(hu)套內(nei)通(tong)電發(fa)熱，由套管間(jian)接把熱量輻(fu)(fu)射(she)(she)給爐(lu)襯和被處(chu)理工件，紅外(wai)輻(fu)(fu)射(she)(she)加熱管廣泛應用于熱處(chu)理行業的各種(zhong)加熱爐(lu)中(zhong)。

輻(fu)射加熱(re)(re)管使用的(de)電(dian)(dian)(dian)熱(re)(re)合金材(cai)料(liao)應具(ju)有(you)較高的(de)電(dian)(dian)(dian)阻(zu)率，電(dian)(dian)(dian)熱(re)(re)轉化率高。由(you)于輻(fu)射管放置在套管內，傳(chuan)熱(re)(re)過(guo)程與一(yi)般敞露型電(dian)(dian)(dian)熱(re)(re)元(yuan)(yuan)件(jian)(jian)不同，其熱(re)(re)屏(ping)蔽(bi)大，升溫(wen)(wen)(wen)過(guo)程中(zhong)必須對元(yuan)(yuan)件(jian)(jian)溫(wen)(wen)(wen)度進行控制，防(fang)止元(yuan)(yuan)件(jian)(jian)超溫(wen)(wen)(wen)。輻(fu)射管封閉加熱(re)(re)時，電(dian)(dian)(dian)熱(re)(re)元(yuan)(yuan)件(jian)(jian)表(biao)面溫(wen)(wen)(wen)度比爐膛溫(wen)(wen)(wen)度高約(yue)100℃-150℃。所(suo)以在選材(cai)時要分析(xi)爐溫(wen)(wen)(wen)、爐內氣溫(wen)(wen)(wen)氛圍，選擇正確的(de)加熱(re)(re)材(cai)料(liao)。

目前輻射(she)管(guan)加熱管(guan)系列(lie)有鼠籠式、立帶(dai)(dai)式和螺(luo)旋式等(deng)，加熱元件系采用(yong)(yong)進口或(huo)(huo)(huo)國產電(dian)阻絲(si)、鎳鉻絲(si)（或(huo)(huo)(huo)帶(dai)(dai)）、鐵鉻鋁（絲(si)或(huo)(huo)(huo)帶(dai)(dai)），保護管(guan)采用(yong)(yong)進口高(gao)溫(wen)(wen)合金板(ban)材、耐熱鋼板(ban)卷制焊接(jie)或(huo)(huo)(huo)離心(xin)鑄造而成，具有高(gao)溫(wen)(wen)抗氧化性和抗滲碳性能好(hao)、使用(yong)(yong)壽命長等(deng)特點。