退火是將鋼材或各種金屬機(jī)械零件加熱到適當(dāng)溫度，保溫一段時間，然后緩慢冷卻，可以獲得接近平衡狀態(tài)組織的熱處理工藝。其目的是為了細(xì)化組織、降低硬度、改善機(jī)械切削加工性能及去除內(nèi)應(yīng)力。在機(jī)械制造行業(yè)，退火通常作為工件制造加工過程中的預(yù)備熱處理工序。

廈門仲鑫達(dá)自動化設(shè)備有限公司

：李素云

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　　強(qiáng)對流電加熱罩式光亮退火藍(lán)化爐主要適用于黃銅帶、青銅帶、異型銅帶、紫銅帶、各類精密銅管、造幣材料、精密帶鋼、復(fù)合帶材、軟磁和硬磁合金、銅合金線材、標(biāo)準(zhǔn)件材料、不銹鋼帶等幾十種材料。單座鐘罩爐大裝料直徑3.2M，裝料高度高達(dá)4M，大裝爐量80T?？紤]到一些小型金屬加工企業(yè)無燃?xì)鈦碓?、無煤炭來源，所以該爐采用電阻帶的加熱方式，與燃?xì)庹质酵嘶馉t比較起來運行成本相對稍高，生產(chǎn)周期相對長一點。但是，其設(shè)備配置簡單，運行可靠，維修方便，退火工藝各階段溫度可設(shè)定，能滿足各種金屬的退火需要。

　　該電加熱罩式退火爐采用單套控制系統(tǒng)獨立控制雙爐座加熱退火爐，爐體本身使用了輕質(zhì)節(jié)能材料，結(jié)構(gòu)設(shè)計合理，保溫效果好，當(dāng)電阻帶溫度達(dá)到1000℃時，加熱罩外殼只是環(huán)境溫度加上40℃。料室保護(hù)氣采用氮氫氣，使得被退火材料在高溫退火狀態(tài)下無氧化、無脫碳。采用抽真空系統(tǒng)節(jié)約大量的保護(hù)氣體和電源能耗。控制系統(tǒng)采用單套西門子S7-200系列PLC全自動控制兩套加熱爐的升溫、保溫、冷卻過程，采用靈敏度高的熱電偶分別采集爐體外罩和內(nèi)罩的溫度，根據(jù)工藝設(shè)定的升溫、保溫時的溫度值PID調(diào)節(jié)加熱器的工作狀態(tài)和加熱頻率，保證保溫溫度的恒定，并配有8寸的觸摸屏，可以生動形象地對各個爐座的升溫、保溫、冷卻過程實行了全方位的控制與管理，為用戶生產(chǎn)合格的產(chǎn)品提供可靠的保障。

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