無縫鋼管生產工藝:
①熱軋無縫鋼管主(zhu)要(yao)生產(chan)工(gong)序(xu)(△主(zhu)要(yao)檢(jian)驗工(gong)序(xu)):
管(guan)坯準(zhun)備(bei)及檢(jian)查△→管(guan)坯加熱(re)→穿孔→軋管(guan)→鋼管(guan)再加熱(re)→定(減)徑→熱(re)處理△→成品(pin)管(guan)矯直(zhi)→精整→檢(jian)驗△(無損、理化、臺檢(jian)) →入庫
②冷軋(拔)無縫鋼管主要生產工序:
坯料準備→酸洗潤滑→冷軋(拔)→熱處理(li)→矯直→精(jing)整→檢(jian)驗(yan)
一(yi)般的(de)(de)(de)(de)無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)生(sheng)產(chan)工(gong)藝可以分為冷(leng)拔與(yu)熱(re)軋(ya)(ya)(ya)兩(liang)種,冷(leng)軋(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)生(sheng)產(chan)流(liu)程一(yi)般要(yao)(yao)比熱(re)軋(ya)(ya)(ya)要(yao)(yao)復雜,管(guan)(guan)(guan)(guan)坯首先(xian)要(yao)(yao)進行(xing)(xing)三輥連軋(ya)(ya)(ya),擠壓后要(yao)(yao)進行(xing)(xing)定徑測試,如果(guo)表(biao)面沒有(you)響應裂(lie)紋后圓管(guan)(guan)(guan)(guan)要(yao)(yao)經過割(ge)機進行(xing)(xing)切(qie)割(ge),切(qie)割(ge)成長度約(yue)一(yi)米的(de)(de)(de)(de)坯料(liao)。然后進入退火流(liu)程,退火要(yao)(yao)用(yong)酸性液體進行(xing)(xing)酸洗(xi),酸洗(xi)時(shi)要(yao)(yao)注(zhu)意表(biao)面是(shi)否有(you)大量(liang)的(de)(de)(de)(de)起(qi)泡(pao)(pao)產(chan)生(sheng),如果(guo)有(you)大量(liang)的(de)(de)(de)(de)起(qi)泡(pao)(pao)產(chan)生(sheng)說明(ming)鋼(gang)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)質量(liang)達不(bu)到相應的(de)(de)(de)(de)標準(zhun)。外觀上冷(leng)軋(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)要(yao)(yao)短于熱(re)軋(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan),冷(leng)軋(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)壁厚(hou)一(yi)般比熱(re)軋(ya)(ya)(ya)無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)要(yao)(yao)小(xiao),但是(shi)表(biao)面看(kan)起(qi)來比厚(hou)壁無(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)更加(jia)明(ming)亮,表(biao)面沒有(you)太(tai)多(duo)的(de)(de)(de)(de)粗糙,口徑也沒有(you)太(tai)多(duo)的(de)(de)(de)(de)毛刺。
無縫鋼管分類
沿其橫(heng)截面的(de)周(zhou)邊上無接(jie)縫的(de)鋼(gang)管(guan)(guan)。根據生產(chan)方法不同(tong)分(fen)(fen)為(wei)熱軋管(guan)(guan)、冷軋管(guan)(guan)、冷拔管(guan)(guan)、擠壓管(guan)(guan)、頂管(guan)(guan)等(deng),均有各自(zi)工藝規(gui)定。材(cai)質有普通和(he)優質碳素結(jie)構鋼(gang)(Q215-A~Q275-A和(he)10~50號鋼(gang))、低(di)合金(jin)(jin)鋼(gang)(09MnV、16Mn等(deng))、合金(jin)(jin)鋼(gang)、不銹耐酸鋼(gang)等(deng)。按用(yong)途分(fen)(fen)為(wei)一般用(yong)途的(de)(用(yong)于輸水、氣管(guan)(guan)道和(he)結(jie)構件(jian)、機械零件(jian))和(he)專用(yong)的(de)(用(yong)于鍋爐(lu)、地質勘(kan)探、軸承、耐酸等(deng))兩(liang)類(lei)。