冷拔無縫鋼管據有很好的抗腐蝕性，冷拔無縫鋼管的理化性能主要取決於鋼（gāng）的化（huà）學成分，組（zǔ）織結構和鋼的純淨度以及冷拔無縫鋼管的熱處理方式等，冷（lěng）拔無縫鋼管常見的工藝性（xìng）能壓扁、擴口、卷邊、彎曲、焊接等。冷拔無（wú）縫鋼管常見的缺陷問題有：
The physical and chemical properties of cold-drawn seamless steel pipe mainly depend on the chemical composition of the steel, the structure and purity of the steel, and the heat treatment method of the cold-drawn seamless steel pipe. The common technological properties of cold-drawn seamless steel pipe are flattening, flanging, bending and welding. Common defects of cold-drawn seamless steel tubes are as follows: a. 危險性缺陷：裂紋、內折、外折、軋破、離層、結疤、拉凹（āo）、凸包（bāo）等。
A. Dangerous defects: cracks, internal folding, external folding, rolling, delamination, scarring, concave drawing, convex hull, etc.
b. 一般性缺陷：麻坑、青線、劃傷、碰傷、輕微（wēi）的內、外（wài）直道、輥印等。
B. General defects: pits, green lines, scratches, bruises, slight internal and external straight paths, roll prints, etc.
缺陷問題產生（shēng）原因：
The causes of defects are as follows:
① 由於管坯（pī）的表麵缺（quē）陷或內部缺陷所帶來的（de）。
It is caused by the surface or internal defects of the billet.
② 生產過（guò）程（chéng）中（zhōng）產（chǎn）生的，如軋製（zhì）工藝參數設計不正確，模具表麵不光滑，潤滑條件不好，孔型（xíng）設計（jì）及調（diào）整不合理。
(2) During the production process, such as incorrect design of rolling process parameters, non-smooth surface of die, poor lubrication conditions, unreasonable pass design and adjustment.
③管坯（pī）(冷拔（bá）無縫鋼管（guǎn）)在加（jiā）熱軋製，熱處理以（yǐ）及矯直過程中，如果因為（wéi）加熱溫度控製（zhì）不當，變形不均勻，加熱冷卻速度不合理（lǐ）或矯直變形量太（tài）大而產生過大的殘餘應力，那麽也有可能導致冷拔（bá）無縫鋼管（guǎn）產生表麵裂紋。
(3) During hot rolling, heat treatment and straightening of cold-drawn seamless steel tube, if excessive residual stress occurs due to improper control of heating temperature, uneven deformation, unreasonable heating and cooling speed or excessive straightening deformation, surface cracks may also occur in cold-drawn seamless steel tube.
目前冷拔無縫鋼管常見的缺陷問題已經在很（hěn）大（dà）程度上進（jìn）行解決，後續還是要多從鋼材的工藝上下手（shǒu），才能在後續的發展過程中取得一個較好的發展。
At present, the common defects of cold-drawn seamless steel tube have been solved to a great extent. In order to achieve a better development in the follow-up process, it is necessary to start with the steel technology.
