不銹鋼封頭是(shi)一種用來封(feng)堵不銹(xiu)鋼管(guan)道的(de)產(chan)(chan)品(pin),是(shi)管(guan)道到頭了之后(hou)或者在一段圓管(guan)的(de)兩頭焊(han)上兩個封(feng)頭做容(rong)器(qi)用的(de)一種產(chan)(chan)品(pin)。
不銹鋼封頭根據幾何形狀的不同,可分為球形、橢圓形、碟形、球冠型、錐殼和平蓋等幾種,其中球形封頭、橢圓形、碟形、球冠型封頭又統稱為凸型封頭。運用于各種容器設備,如儲罐、換熱器、塔、反應釜、鍋爐和分離設備等。
不(bu)銹(xiu)鋼(gang)封頭在(zai)700℃以(yi)(yi)下鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)造,氧(yang)(yang)化(hua)皮形(xing)(xing)(xing)成(cheng)少,而且表面(mian)無脫(tuo)碳現(xian)(xian)象。因此(ci),只(zhi)要(yao)(yao)(yao)變(bian)形(xing)(xing)(xing)能在(zai)成(cheng)形(xing)(xing)(xing)能范(fan)圍內,冷鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)容易得到(dao)(dao)很(hen)(hen)好(hao)的尺(chi)寸(cun)精(jing)(jing)度(du)(du)(du)和表面(mian)光潔度(du)(du)(du)。只(zhi)要(yao)(yao)(yao)控制好(hao)溫(wen)(wen)度(du)(du)(du)和潤滑(hua)冷卻,700℃以(yi)(yi)下的溫(wen)(wen)螺紋(wen)管(guan)(guan)(guan)件(jian)(jian)(jian),對焊(han)管(guan)(guan)(guan)件(jian)(jian)(jian),不(bu)銹(xiu)鋼(gang)管(guan)(guan)(guan)件(jian)(jian)(jian)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)也(ye)可(ke)(ke)以(yi)(yi)獲得很(hen)(hen)好(hao)的精(jing)(jing)度(du)(du)(du)。熱(re)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)時,由(you)(you)于(yu)(yu)變(bian)形(xing)(xing)(xing)能和變(bian)形(xing)(xing)(xing)阻(zu)力(li)都很(hen)(hen)小(xiao),可(ke)(ke)以(yi)(yi)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)造形(xing)(xing)(xing)狀復雜的大(da)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)。要(yao)(yao)(yao)得到(dao)(dao)高(gao)尺(chi)寸(cun)精(jing)(jing)度(du)(du)(du)的鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian),可(ke)(ke)在(zai)900-1000℃溫(wen)(wen)度(du)(du)(du)域內用(yong)(yong)熱(re)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)加工。在(zai)700℃以(yi)(yi)下鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)造,氧(yang)(yang)化(hua)皮形(xing)(xing)(xing)成(cheng)少,而且表面(mian)無脫(tuo)碳現(xian)(xian)象。因此(ci),只(zhi)要(yao)(yao)(yao)變(bian)形(xing)(xing)(xing)能在(zai)成(cheng)形(xing)(xing)(xing)能范(fan)圍內,冷鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)容易得到(dao)(dao)很(hen)(hen)好(hao)的尺(chi)寸(cun)精(jing)(jing)度(du)(du)(du)和表面(mian)光潔度(du)(du)(du)。只(zhi)要(yao)(yao)(yao)控制好(hao)溫(wen)(wen)度(du)(du)(du)和潤滑(hua)冷卻,700℃以(yi)(yi)下的溫(wen)(wen)螺紋(wen)管(guan)(guan)(guan)件(jian)(jian)(jian),對焊(han)管(guan)(guan)(guan)件(jian)(jian)(jian),不(bu)銹(xiu)鋼(gang)管(guan)(guan)(guan)件(jian)(jian)(jian)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)也(ye)可(ke)(ke)以(yi)(yi)獲得很(hen)(hen)好(hao)的精(jing)(jing)度(du)(du)(du)。熱(re)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)時,由(you)(you)于(yu)(yu)變(bian)形(xing)(xing)(xing)能和變(bian)形(xing)(xing)(xing)阻(zu)力(li)都很(hen)(hen)小(xiao),可(ke)(ke)以(yi)(yi)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)造形(xing)(xing)(xing)狀復雜的大(da)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)。要(yao)(yao)(yao)得到(dao)(dao)高(gao)尺(chi)寸(cun)精(jing)(jing)度(du)(du)(du)的鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian),可(ke)(ke)在(zai)900-1000℃溫(wen)(wen)度(du)(du)(du)域內用(yong)(yong)熱(re)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)加工。
2.不銹鋼封(feng)頭的應用
不(bu)銹鋼封(feng)頭(tou)應(ying)用范圍:石油、電子、化(hua)工、輕(qing)紡、食(shi)品、機械、建筑、壓力容器等行業(ye)。不(bu)銹鋼封(feng)頭(tou)是管(guan)(guan)(guan)道(dao)安裝中常用的一(yi)種連(lian)接用管(guan)(guan)(guan)件,連(lian)接兩(liang)根公稱通(tong)徑相(xiang)同或者不(bu)同的管(guan)(guan)(guan)子,使管(guan)(guan)(guan)路做一(yi)定角度轉(zhuan)彎。
3.不銹(xiu)鋼(gang)封頭(tou)的保(bao)管
不銹(xiu)鋼封頭(tou)保管時(shi)應注意(yi)水(shui)(shui)分、灰塵、油、潤滑油等,以及表(biao)面(mian)發生銹(xiu) ,或者焊接不良耐蝕(shi)性(xing)下降。 貼(tie)(tie)膜(mo)(mo)(mo)和鋼板基體(ti)之間浸入(ru)水(shui)(shui)分時(shi),腐蝕(shi)速度反而比沒貼(tie)(tie)膜(mo)(mo)(mo)時(shi)情況還要快。應放在干凈、干燥易通風處(chu),保持原來的(de)包裝狀(zhuang)態,貼(tie)(tie)膜(mo)(mo)(mo)的(de)不銹(xiu)鋼應避(bi)免直射(she)光線,貼(tie)(tie)膜(mo)(mo)(mo)應周期性(xing)做檢(jian)查,要是(shi)貼(tie)(tie)膜(mo)(mo)(mo)變質(貼(tie)(tie)膜(mo)(mo)(mo)壽命6個月)應立即替換,加墊(dian)紙時(shi)包裝材料若浸濕,為防止表(biao)面(mian)腐蝕(shi)應立即除掉墊(dian)紙。
4.不(bu)銹鋼封頭(tou)的(de)熱(re)處理
不(bu)銹(xiu)鋼封(feng)頭在(zai)加(jia)熱和冷(leng)卻過程中,不(bu)銹(xiu)鋼封(feng)頭由(you)(you)于表層和心(xin)部(bu)的冷(leng)卻速度和時間的不(bu)一(yi)致(zhi),形成溫差(cha),就(jiu)會導致(zhi)體(ti)積膨脹和收縮不(bu)均而產生應(ying)力(li),即熱應(ying)力(li)。在(zai)熱應(ying)力(li)的作用下,由(you)(you)于表層開始(shi)溫度低(di)于心(xin)部(bu),收縮也大于心(xin)部(bu)而使心(xin)部(bu)受(shou)拉,當冷(leng)卻結(jie)束時,由(you)(you)于心(xin)部(bu)朂后冷(leng)卻體(ti)積收縮不(bu)能自由(you)(you)進行而使表層受(shou)壓心(xin)部(bu)受(shou)拉。
keyword:不銹鋼封頭
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