同為無縫鋼管 熱軋管和冷拔管的區別有哪些？

小口徑無縫鋼管按生產方法可分為：熱軋無縫管、冷拔管、精密鋼管、熱擴管、冷旋壓管和擠壓管等。無縫鋼管廠家用碳素鋼或合金鋼制成，有熱軋、冷軋（拔）之分。那么熱軋管和冷拔管的區別什么呢？襄陽無縫鋼管廠一起(qi)來了解(jie)一下吧。

熱軋(ya)是指在再(zai)結晶溫度以上進行的軋(ya)制。熱軋(ya)工(gong)藝(yi)能(neng)顯著降低能(neng)耗，降低成(cheng)本。熱軋(ya)時(shi)金屬塑性高(gao)，變(bian)形(xing)抗力低，大(da)大(da)減(jian)少(shao)了(le)金屬變(bian)形(xing)的能(neng)量消耗，而且能(neng)改善金屬及合(he)(he)金的加(jia)工(gong)工(gong)藝(yi)性能(neng)，即將鑄造狀態的粗大(da)晶粒破碎，顯著裂紋愈合(he)(he)，減(jian)少(shao)或消除鑄造缺陷，將鑄態組織(zhi)轉變(bian)為(wei)變(bian)形(xing)組織(zhi)，提(ti)高(gao)合(he)(he)金的加(jia)工(gong)性能(neng)。

冷(leng)拔(ba)(ba)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)是(shi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)一種(zhong)，也叫冷(leng)軋管(guan)(guan)(guan)(guan)(guan)(guan)，即其(qi)(qi)按生產(chan)工(gong)(gong)藝的(de)(de)不同分類的(de)(de)一種(zhong)，區別于(yu)熱軋(擴)管(guan)(guan)(guan)(guan)(guan)(guan)。在(zai)毛管(guan)(guan)(guan)(guan)(guan)(guan)坯或原料管(guan)(guan)(guan)(guan)(guan)(guan)擴徑(jing)的(de)(de)過程中(zhong)通過多道(dao)次的(de)(de)冷(leng)拔(ba)(ba)加工(gong)(gong)而(er)成，通常在(zai)0.5～100T的(de)(de)單鏈(lian)式(shi)或雙鏈(lian)式(shi)冷(leng)拔(ba)(ba)機上進(jin)行。冷(leng)軋(撥)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)除分一般鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、低(di)中(zhong)壓鍋(guo)爐(lu)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、高壓鍋(guo)爐(lu)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、合金鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、不銹鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、石油裂(lie)化管(guan)(guan)(guan)(guan)(guan)(guan)、機械加工(gong)(gong)管(guan)(guan)(guan)(guan)(guan)(guan)、厚壁(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)、小口(kou)(kou)徑(jing)加內模冷(leng)拔(ba)(ba)管(guan)(guan)(guan)(guan)(guan)(guan)其(qi)(qi)它鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)外，還包括碳素薄壁(bi)(bi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、合金薄壁(bi)(bi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、不銹薄壁(bi)(bi)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、異型(xing)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。冷(leng)拔(ba)(ba)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)其(qi)(qi)外徑(jing)可以到(dao)(dao)6mm，壁(bi)(bi)厚可到(dao)(dao)0.25mm，薄壁(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)可到(dao)(dao)5mm壁(bi)(bi)厚小于(yu)0.25mm尺(chi)寸，精(jing)度以及表面質(zhi)量均明顯優于(yu)熱軋(擴)管(guan)(guan)(guan)(guan)(guan)(guan)，但受工(gong)(gong)藝制約，其(qi)(qi)口(kou)(kou)徑(jing)以及長度均受到(dao)(dao)一定限(xian)制。

熱軋管和冷拔管的區(qu)別

1、從尺(chi)寸精度：冷軋鋼管(guan)的尺(chi)寸精度高。

2、從外觀：冷軋鋼管的(de)表面光亮, 熱軋鋼管的(de)表面有明(ming)顯的(de)氧化(hua)皮或紅銹。

3、從口徑(jing)尺寸：冷軋(ya)鋼管的(de)口徑(jing)比熱(re)軋(ya)鋼管的(de)尺寸小(xiao)(主要是機械不同,各有所專)。

4、從價格：冷軋(ya)鋼(gang)管比熱軋(ya)鋼(gang)管貴(gui)1000-2000一噸(千萬不可以(yi)貪便宜(yi))。

5、從用(yong)途：熱軋鋼管(guan)用(yong)在(zai)流體輸送(song)，機(ji)械結(jie)構等對尺寸要(yao)求不高的(de)場合(he)，冷軋鋼管(guan)用(yong)在(zai)精密儀器(qi)，液壓系(xi)統，氣動等要(yao)求高的(de)地(di)方。