钢管2026，Vol.55Issue(2)：55-58,4.DOI:10.19938/j.steelpipe.1001-2311.2026.2.55.58
25Mn冷拔油缸管内表面白点缺陷分析
Analysis of White Spot Defect on Inner Surface of 25Mn Cold-drawn Oil Cylinder Tube
金鑫 1王世明1
作者信息
- 1. 衡阳华菱钢管有限公司,湖南衡阳 421001
- 折叠
摘要
Abstract
Physical and chemical methods are adopted to analyze the white spot defect appearing on the inner surface of the 25Mn cold-drawn oil cylinder tube during skiving and roller-burnishing after cold drawing and stress relief.The results show that the main components of the said white spot defect are Al2O3,CaO and MgO which are similar to those of the ladle slag,so it is determined that the defect is caused by slag entrapment occurring during the casting process.Reducing the formation of Type B inclusions in the steel for the oil cylinder tube can decrease the occurrence probability of the white spot defect.Accordingly specific improvement measures are taken,including controlling the oxygen content in the steel during smelting,reducing the introduction of inclusions from raw materials,strengthening the floating and removal of inclusions in the steel,avoiding mold slag entrapment,and improving the quality of refractory materials.关键词
冷拔油缸管/25Mn/白点缺陷/非金属夹杂物/改进措施Key words
cold-drawn oil cylinder tube/25Mn/white spot defect/non-metallic inclusion/improvement measure引用本文复制引用
金鑫,王世明..25Mn冷拔油缸管内表面白点缺陷分析[J].钢管,2026,55(2):55-58,4.
