無縫鋼管生產工藝:
①熱軋無縫鋼管主要生產工序(△主要檢驗工序):
管(guan)(guan)坯準備及檢(jian)查(cha)△→管(guan)(guan)坯加(jia)熱(re)→穿孔(kong)→軋(ya)管(guan)(guan)→鋼管(guan)(guan)再加(jia)熱(re)→定(減)徑(jing)→熱(re)處理△→成品管(guan)(guan)矯直→精整→檢(jian)驗(yan)△(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(liao)準備→酸洗(xi)潤滑→冷軋(拔(ba))→熱處理(li)→矯直→精整→檢驗
一(yi)般的(de)(de)(de)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)的(de)(de)(de)生(sheng)(sheng)產(chan)工藝(yi)可以分為(wei)冷拔(ba)與熱(re)軋(ya)(ya)兩種,冷軋(ya)(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)的(de)(de)(de)生(sheng)(sheng)產(chan)流(liu)程一(yi)般要(yao)(yao)比熱(re)軋(ya)(ya)要(yao)(yao)復雜,管(guan)(guan)(guan)坯首(shou)先要(yao)(yao)進(jin)行(xing)(xing)三輥連軋(ya)(ya),擠壓后要(yao)(yao)進(jin)行(xing)(xing)定徑測(ce)試(shi),如果(guo)表(biao)(biao)面(mian)(mian)沒有(you)響應裂紋(wen)后圓管(guan)(guan)(guan)要(yao)(yao)經過割機進(jin)行(xing)(xing)切割,切割成長(chang)度(du)約一(yi)米的(de)(de)(de)坯料。然后進(jin)入(ru)退火流(liu)程,退火要(yao)(yao)用酸(suan)(suan)(suan)性液體進(jin)行(xing)(xing)酸(suan)(suan)(suan)洗(xi),酸(suan)(suan)(suan)洗(xi)時要(yao)(yao)注意表(biao)(biao)面(mian)(mian)是否有(you)大(da)量(liang)的(de)(de)(de)起泡(pao)產(chan)生(sheng)(sheng),如果(guo)有(you)大(da)量(liang)的(de)(de)(de)起泡(pao)產(chan)生(sheng)(sheng)說明鋼(gang)(gang)管(guan)(guan)(guan)的(de)(de)(de)質量(liang)達不到相應的(de)(de)(de)標(biao)準。外觀上(shang)冷軋(ya)(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)要(yao)(yao)短(duan)于熱(re)軋(ya)(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan),冷軋(ya)(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)的(de)(de)(de)壁厚(hou)一(yi)般比熱(re)軋(ya)(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)要(yao)(yao)小,但(dan)是表(biao)(biao)面(mian)(mian)看起來(lai)比厚(hou)壁無(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)更加明亮,表(biao)(biao)面(mian)(mian)沒有(you)太多的(de)(de)(de)粗糙,口(kou)徑也(ye)沒有(you)太多的(de)(de)(de)毛刺。
無縫鋼管分類
沿其橫截(jie)面的周邊上無接縫(feng)的鋼(gang)(gang)管。根據生產方法(fa)不同分為(wei)熱軋管、冷(leng)軋管、冷(leng)拔管、擠壓(ya)管、頂管等,均有各自工藝(yi)規(gui)定(ding)。材質(zhi)有普通(tong)和(he)優質(zhi)碳(tan)素結構鋼(gang)(gang)(Q215-A~Q275-A和(he)10~50號(hao)鋼(gang)(gang))、低(di)合金(jin)鋼(gang)(gang)(09MnV、16Mn等)、合金(jin)鋼(gang)(gang)、不銹耐酸鋼(gang)(gang)等。按用途分為(wei)一(yi)般用途的(用于(yu)輸(shu)水、氣管道和(he)結構件、機械零件)和(he)專用的(用于(yu)鍋爐(lu)、地質(zhi)勘探、軸(zhou)承、耐酸等)兩類。