主營各種燃氣式鋁合金熱處理爐、臺車式燃氣爐、燃氣式托輥網帶爐生產線、天然氣鋁合金固熔淬火爐、天然氣鋁合金時效爐 |
天然氣鋁合金時效爐的工作原理發布日期:2022-3-22 類別:公司新聞 瀏覽量: 4499 次 鋁(lv)(lv)合金(jin)時效(xiao)(xiao)爐(lu)主要用(yong)(yong)于(yu)對鋁(lv)(lv)合金(jin),不銹(xiu)鋼沖壓件去除應力的時效(xiao)(xiao)處(chu)理(li),也可用(yong)(yong)于(yu)普通(tong)產品(pin)烘(hong)干,適應于(yu)模(mo)具,軍工(gong),電(dian)子,科(ke)研等行(xing)業。 時效(xiao)(xiao)爐(lu)的作用(yong)(yong)是對工(gong)件、部件回火(huo)及鋁(lv)(lv)合金(jin)零件淬火(huo)時效(xiao)(xiao)等熱處(chu)理(li)使用(yong)(yong),功能(neng)有類似淬火(huo)爐(lu),也屬于(yu)周期式作業電(dian)爐(lu)。 天然(ran)(ran)氣鋁合(he)(he)金時效爐(lu)采用(yong)天然(ran)(ran)氣為能(neng)(neng)(neng)源,將(jiang)天然(ran)(ran)氣燃燒出的(de)熱量,在爐(lu)爐(lu)內(nei)高強(qiang)度內(nei)循(xun)環,使(shi)鋁合(he)(he)金零件的(de)受熱處理,控制加(jia)熱速(su)度升到(dao)某一種溫度下保溫一定(ding)時間(jian)并以一定(ding)的(de)速(su)度冷卻(que),改變其(qi)合(he)(he)金的(de)組(zu)織。其(qi)主要目的(de)是提高合(he)(he)金的(de)力學性能(neng)(neng)(neng),增強(qiang)耐腐蝕性能(neng)(neng)(neng),改善加(jia)工性能(neng)(neng)(neng),達到(dao)產品內(nei)性能(neng)(neng)(neng)穩定(ding)性。 對于(yu)含碳量較高(gao)(gao)的鋼,經淬火(huo)后(hou)(hou)立(li)即獲得很(hen)高(gao)(gao)的硬度(du),而塑性則很(hen)低。然而對鋁(lv)合金(jin)則不然,鋁(lv)合金(jin)剛(gang)淬火(huo)后(hou)(hou),強(qiang)(qiang)度(du)與(yu)硬度(du)并不會立(li)即升(sheng)(sheng)高(gao)(gao),至(zhi)于(yu)塑性非(fei)但沒有(you)下降,反而有(you)所上升(sheng)(sheng)。但這種淬火(huo)后(hou)(hou)的合金(jin),放置一段時(shi)間(如4~6晝夜后(hou)(hou)),強(qiang)(qiang)度(du)和硬度(du)會顯著(zhu)(zhu)提高(gao)(gao),而塑性則明顯降低。淬火(huo)后(hou)(hou)鋁(lv)合金(jin)的強(qiang)(qiang)度(du)、硬度(du)隨(sui)時(shi)間增長(chang)而顯著(zhu)(zhu)提高(gao)(gao)的現(xian)象,稱(cheng)為時(shi)效。時(shi)效可(ke)以在常溫(wen)(wen)(wen)下發(fa)生,稱(cheng)自然時(shi)效,也可(ke)以在高(gao)(gao)于(yu)室溫(wen)(wen)(wen)的某一溫(wen)(wen)(wen)度(du)范圍(如100~200℃)內發(fa)生,稱(cheng)人工時(shi)效鋁(lv)合金(jin)熱處理爐。 時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)爐的(de)(de)工(gong)作原理(li):鋁合(he)(he)金(jin)(jin)時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)爐淬(cui)火(huo)(huo)(huo)后(hou)硬(ying)度不(bu)高(gao),但在室溫(wen)(wen)(wen)下(xia)放置一(yi)(yi)(yi)段時(shi)(shi)(shi)(shi)(shi)間(jian)后(hou),硬(ying)度便(bian)顯著上升,這種(zhong)現(xian)(xian)象(xiang)后(hou)來被稱為沉(chen)淀硬(ying)化。這一(yi)(yi)(yi)發(fa)(fa)現(xian)(xian)在工(gong)程界引起了較(jiao)(jiao)大興(xing)趣。隨后(hou)人(ren)(ren)們相(xiang)繼發(fa)(fa)現(xian)(xian)了一(yi)(yi)(yi)些可以采(cai)(cai)用時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)處(chu)(chu)理(li)進(jin)(jin)行強(qiang)化的(de)(de)鋁合(he)(he)金(jin)(jin)、銅合(he)(he)金(jin)(jin)和(he)鐵基合(he)(he)金(jin)(jin),開創了一(yi)(yi)(yi)條與一(yi)(yi)(yi)般鋼(gang)鐵淬(cui)火(huo)(huo)(huo)強(qiang)化有本質差異(yi)的(de)(de)新的(de)(de)強(qiang)化途徑(jing)——時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)強(qiang)化.在時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)處(chu)(chu)理(li)前進(jin)(jin)行固(gu)溶處(chu)(chu)理(li)時(shi)(shi)(shi)(shi)(shi),加(jia)(jia)熱(re)溫(wen)(wen)(wen)度需(xu)要嚴格控制(zhi),以便(bian)使溶質原子能較(jiao)(jiao)好(hao)地固(gu)溶到(dao)固(gu)溶體(ti)(ti)中,同時(shi)(shi)(shi)(shi)(shi)又(you)不(bu)致使合(he)(he)金(jin)(jin)發(fa)(fa)生(sheng)熔化。許多鋁合(he)(he)金(jin)(jin)固(gu)溶處(chu)(chu)理(li)加(jia)(jia)熱(re)溫(wen)(wen)(wen)度容(rong)許的(de)(de)偏差只有5℃左右。進(jin)(jin)行人(ren)(ren)工(gong)時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)處(chu)(chu)理(li),需(xu)要嚴格控制(zhi)加(jia)(jia)熱(re)溫(wen)(wen)(wen)度和(he)保(bao)溫(wen)(wen)(wen)時(shi)(shi)(shi)(shi)(shi)間(jian),才能得到(dao)比(bi)較(jiao)(jiao)理(li)想(xiang)的(de)(de)強(qiang)化效(xiao)(xiao)(xiao)果。生(sheng)產中有時(shi)(shi)(shi)(shi)(shi)采(cai)(cai)用分(fen)段時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao),即先在室溫(wen)(wen)(wen)或(huo)比(bi)室溫(wen)(wen)(wen)稍高(gao)的(de)(de)溫(wen)(wen)(wen)度下(xia)保(bao)溫(wen)(wen)(wen)一(yi)(yi)(yi)段時(shi)(shi)(shi)(shi)(shi)間(jian),然(ran)后(hou)在更高(gao)的(de)(de)溫(wen)(wen)(wen)度下(xia)再(zai)保(bao)溫(wen)(wen)(wen)一(yi)(yi)(yi)段時(shi)(shi)(shi)(shi)(shi)間(jian)。這樣作有時(shi)(shi)(shi)(shi)(shi)會得到(dao)較(jiao)(jiao)好(hao)的(de)(de)效(xiao)(xiao)(xiao)果。馬氏(shi)體(ti)(ti)時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)鋼(gang)淬(cui)火(huo)(huo)(huo)時(shi)(shi)(shi)(shi)(shi)會發(fa)(fa)生(sheng)組織(zhi)轉變,形成馬氏(shi)體(ti)(ti)。馬氏(shi)體(ti)(ti)就是(shi)一(yi)(yi)(yi)種(zhong)過飽和(he)固(gu)溶體(ti)(ti)。這種(zhong)鋼(gang)也(ye)可采(cai)(cai)用時(shi)(shi)(shi)(shi)(shi)效(xiao)(xiao)(xiao)處(chu)(chu)理(li)進(jin)(jin)行強(qiang)化。 上一條:臺車式燃氣爐的操作檢修保養規程講解! |
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