無縫鋼管生產工藝:
①熱軋無縫鋼管主(zhu)要生產工(gong)序(xu)(xu)(△主(zhu)要檢驗工(gong)序(xu)(xu)):
管坯準備及檢查△→管坯加熱(re)→穿(chuan)孔→軋管→鋼管再加熱(re)→定(減)徑(jing)→熱(re)處理△→成(cheng)品管矯(jiao)直→精(jing)整→檢驗△(無損、理化、臺檢) →入庫
②冷軋(拔)無縫鋼管主要生產工序:
坯(pi)料準備(bei)→酸洗潤(run)滑→冷(leng)軋(拔)→熱處理→矯直(zhi)→精整→檢驗
一(yi)(yi)般的無縫鋼管(guan)(guan)(guan)(guan)(guan)的生(sheng)產(chan)(chan)(chan)工藝可以分為冷拔與熱(re)軋(ya)兩種(zhong),冷軋(ya)無縫鋼管(guan)(guan)(guan)(guan)(guan)的生(sheng)產(chan)(chan)(chan)流(liu)程(cheng)一(yi)(yi)般要(yao)(yao)比(bi)(bi)熱(re)軋(ya)要(yao)(yao)復雜,管(guan)(guan)(guan)(guan)(guan)坯首(shou)先要(yao)(yao)進(jin)行三輥連軋(ya),擠(ji)壓后(hou)要(yao)(yao)進(jin)行定徑測(ce)試,如果表(biao)面(mian)沒有(you)響應裂(lie)紋后(hou)圓管(guan)(guan)(guan)(guan)(guan)要(yao)(yao)經(jing)過(guo)割(ge)(ge)機進(jin)行切割(ge)(ge),切割(ge)(ge)成長度(du)約(yue)一(yi)(yi)米(mi)的坯料。然后(hou)進(jin)入退火流(liu)程(cheng),退火要(yao)(yao)用酸性(xing)液體進(jin)行酸洗,酸洗時要(yao)(yao)注(zhu)意表(biao)面(mian)是(shi)否有(you)大(da)量(liang)的起泡產(chan)(chan)(chan)生(sheng),如果有(you)大(da)量(liang)的起泡產(chan)(chan)(chan)生(sheng)說明鋼管(guan)(guan)(guan)(guan)(guan)的質量(liang)達不到相應的標準。外(wai)觀上冷軋(ya)無縫鋼管(guan)(guan)(guan)(guan)(guan)要(yao)(yao)短于熱(re)軋(ya)無縫鋼管(guan)(guan)(guan)(guan)(guan),冷軋(ya)無縫鋼管(guan)(guan)(guan)(guan)(guan)的壁厚一(yi)(yi)般比(bi)(bi)熱(re)軋(ya)無縫鋼管(guan)(guan)(guan)(guan)(guan)要(yao)(yao)小,但是(shi)表(biao)面(mian)看起來比(bi)(bi)厚壁無縫鋼管(guan)(guan)(guan)(guan)(guan)更(geng)加明亮,表(biao)面(mian)沒有(you)太多(duo)的粗糙,口徑也沒有(you)太多(duo)的毛刺。
無縫鋼管分類
沿其(qi)橫截面的周邊上無接(jie)縫的鋼(gang)(gang)管(guan)。根據生產(chan)方法不同分(fen)為(wei)熱軋(ya)管(guan)、冷軋(ya)管(guan)、冷拔管(guan)、擠壓管(guan)、頂管(guan)等(deng)(deng),均(jun)有(you)各自工藝規定。材質(zhi)有(you)普通和優質(zhi)碳素結(jie)構(gou)鋼(gang)(gang)(Q215-A~Q275-A和10~50號(hao)鋼(gang)(gang))、低(di)合金(jin)鋼(gang)(gang)(09MnV、16Mn等(deng)(deng))、合金(jin)鋼(gang)(gang)、不銹(xiu)耐酸(suan)鋼(gang)(gang)等(deng)(deng)。按用(yong)途分(fen)為(wei)一般用(yong)途的(用(yong)于(yu)輸水、氣管(guan)道和結(jie)構(gou)件、機械零件)和專用(yong)的(用(yong)于(yu)鍋爐(lu)、地質(zhi)勘(kan)探、軸承(cheng)、耐酸(suan)等(deng)(deng))兩(liang)類(lei)。