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箱(xiang)(xiang)式(shi)電(dian)阻爐形狀(zhuang)好像一(yi)個矩形箱(xiang)(xiang)體，分別以(yi)電(dian)阻絲、硅碳棒、硅鉬棒為(wei)(wei)發熱元件，采(cai)用(yong)耐(nai)火(huo)(huo)材(cai)料(liao)和保溫(wen)(wen)材(cai)料(liao)做爐襯。用(yong)于對工件進行正火(huo)(huo)、退火(huo)(huo)、淬火(huo)(huo)等熱處理。按照加熱溫(wen)(wen)度(du)的不同(tong)一(yi)般分為(wei)(wei)三種(zhong)類型，溫(wen)(wen)度(du)高(gao)(gao)于1000℃稱為(wei)(wei)高(gao)(gao)溫(wen)(wen)箱(xiang)(xiang)式(shi)電(dian)阻爐，溫(wen)(wen)度(du)在600一(yi)1000℃之(zhi)間稱為(wei)(wei)中(zhong)溫(wen)(wen)箱(xiang)(xiang)式(shi)電(dian)阻爐，溫(wen)(wen)度(du)低于600℃稱為(wei)(wei)低溫(wen)(wen)箱(xiang)(xiang)式(shi)電(dian)阻爐，以(yi)滿足(zu)不同(tong)熱處理溫(wen)(wen)度(du)的需(xu)要(yao)。