Key words: scratches
Treatment of scratches on inner and outer surfaces of cold-drawn seamless steel tubes:
1. Improve the surface quality of cold-drawn seamless steel pipe die.
2. The oxide scale on the surface of cold-drawn seamless steel pipe should be pickled and washed, and the coating should be uniform and firm.
3. The transition part of hammer head should be smooth and angular.
4. Check the surface of the die and cold-drawn seamless steel tube, and find out the problems in time.


The above measures can effectively prevent the surface scratches of cold-drawn seamless steel tubes.