真空燒結爐的結構介紹
真空燒結爐的結構(gou)介(jie)紹
真空燒結爐采用耐熱(re)鋼制造的(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)罐(guan)放(fang)入(ru)電(dian)阻(zu)(zu)爐(lu)中,根據真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)處理工(gong)藝(yi)的(de)(de)需(xu)要,配(pei)接適(shi)當(dang)的(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)系統(tong),即成為筒單(dan)的(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)熱(re)處理爐(lu)。是由電(dian)阻(zu)(zu)爐(lu),真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)罐(guan)硬和真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)悶門、真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)計等構(gou)成的(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)系統(tong)。其熱(re)源在真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)的(de)(de)外部(bu),也就是電(dian)熱(re)元件(jian)設(she)置在真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)罐(guan)的(de)(de)外部(bu),工(gong)件(jian)放(fang)在真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)罐(guan)的(de)(de)內部(bu),靠間接加熱(re)。以下是燒(shao)結(jie)爐(lu)的(de)(de)幾種(zhong)結(jie)構(gou):

1.鐘罩式結構:這(zhe)種結構的真(zhen)(zhen)空缺座落在爐(lu)(lu)底上,整個爐(lu)(lu)底和真(zhen)(zhen)空罐可(ke)以(yi)借助于電(dian)動(dong)或液壓傳動(dong)升降,以(yi)完(wan)成裝出(chu)料操(cao)作(zuo)并(bing)能縮短冷卻時間(jian)。也可(ke)以(yi)采(cai)取真(zhen)(zhen)空罐和爐(lu)(lu)底固定不(bu)動(dong),罩式爐(lu)(lu)體(ti)升降的方(fang)法來(lai)完(wan)成進出(chu)料操(cao)作(zuo)等(deng),但(dan)是爐(lu)(lu)體(ti)升降較為復雜。采(cai)用哪一種方(fang)法,要根據現場實際情況而定。
2.雙真空(kong)結構:這種結構不僅真空(kong)罐內部(bu)被抽成真空(kong),而且(qie)真空(kong)罐外部(bu)的爐體部(bu)分也被抽成真空(kong)。這樣,就可(ke)以減(jian)少(shao)真空(kong)鑲承受的壓力,避(bi)免真空(kong)罐外壁氧化和變(bian)形,延長了真空(kong)罐的使(shi)用壽命。
在使用(yong)時還(huan)要注意,真(zhen)空(kong)罐是燒結爐的(de)關(guan)鍵性(xing)部件(jian)。由(you)于(yu)真(zhen)空(kong)罐須在高(gao)溫(wen)和(he)一個大氣壓(ya)的(de)外壓(ya)條件(jian)下(xia)工作,所(suo)以,真(zhen)空(kong)罐的(de)材料應(ying)具備良好的(de)熱穩定性(xing)和(he)耐氧化(hua)性(xing),間接性(xing)能要好,焊縫不易產(chan)生氣孔、開裂,保證高(gao)溫(wen)氣密性(xing)。材料成分中的(de)元素蒸氣壓(ya)要低,防止合金元素在高(gao)溫(wen)、高(gao)真(zhen)空(kong)下(xia)揮發。
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