冷拔無縫鋼管據有很好的抗腐（fǔ）蝕性，冷拔無縫鋼管的理化性（xìng）能主要取（qǔ）決（jué）於鋼的化學（xué）成分，組織結構和鋼的純淨（jìng）度以及冷拔無縫鋼管的熱處理方式等，冷拔無縫鋼管常見的工藝性能壓扁（biǎn）、擴口、卷邊、彎曲、焊接等。冷拔（bá）無縫鋼管常見的缺陷問題（tí）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（liè）紋、內折、外折、軋破、離層、結疤、拉凹、凸包等（děng）。
A. Dangerous defects: cracks, internal folding, external folding, rolling, delamination, scarring, concave drawing, convex hull, etc.
b. 一般性（xìng）缺陷：麻坑、青線、劃傷、碰傷、輕微的內、外直（zhí）道、輥印等。
B. General defects: pits, green lines, scratches, bruises, slight internal and external straight paths, roll prints, etc.
缺陷問（wèn）題產生原因：
The causes of defects are as follows:
① 由於管坯的表麵缺陷或內部缺陷所帶來的。
It is caused by the surface or internal defects of the billet.
② 生產過程中（zhōng）產生的，如軋製工藝參數設計不正確，模具表麵不光滑（huá），潤滑條件（jiàn）不好，孔型設計及調整不合理。
(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(冷拔無縫鋼管)在加（jiā）熱軋（zhá）製，熱處理以及矯直過程中（zhōng），如果因為加（jiā）熱（rè）溫度控製不當，變形（xíng）不均勻，加（jiā）熱（rè）冷卻速度不合理或矯直變（biàn）形量太大而產生過大的殘餘應力，那麽也有可能導致（zhì）冷拔無縫鋼管（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（yǐ）經在（zài）很大程度上進行解決，後續還是要多從鋼材的工藝上下手，才能在後續的發展過程中取得一個較好的發（fā）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.
