How to clean up defects in seamless steel pipe blanks?

How to clean up defects in seamless steel pipe blanks?

Overview
1. Steel billet types: continuous cast round billet, rolled (forged) round billet, centrifugally cast hollow round billet, steel ingot

2. Continuous casting types: vertical continuous casting machine, arc continuous casting machine, horizontal continuous casting machine

3. Advantages of slab continuous casting: ① Simple process flow and low production cost.
②High output.
③ Improved production conditions and high degree of automation.
④ Save energy.
Continuous cast round billets are directly used to produce seamless pipes. Due to its low cost and good quality, it has brought a profound revolution to the seamless steel pipe manufacturing industry. At present, it has gradually replaced steel ingots and rolled (forged) round tube blanks to produce seamless steel pipes.
In order to improve the quality of seamless steel pipes, we must first ensure the quality of steel billets.

Inspection and cleaning of billet defects
The quality of the steel billet has an extremely important impact on the quality of the steel pipe. Any steel billet that does not meet the quality requirements cannot be fed in, and the surface defects of the billet must be cleaned.

1. Steel billet quality inspection method:
①Visual inspection: surface quality
② Low-magnification structure: Use sulfur printing method, acid leaching method, industrial hydrochloric acid or copper chloride solution to check the distribution of cracks, bubbles, looseness, white spots, inclusions, etc.

2. Cleaning of surface defects of steel billet:
① Flame cleaning: ≤0.4%c to clean surface defects of tube blanks
②Air shovel cleaning: suitable for cleaning local defects on the surface of tube blanks
③Grinding wheel cleaning: mainly used for steel billets that are not suitable for flame cleaning
④ Turning cleaning: Mainly used for cleaning surface defects of tube blanks with high added value and high quality requirements.
In short, the inspection and inspection of the quality of the steel billet and the necessary cleaning of the surface defects of the steel billet are the basic prerequisites to ensure that the blanks used in the production of seamless steel pipes meet the quality requirements.

Article source: https://article-realm.com/article/Business/54011-How-to-clean-up-defects-in-seamless-steel-pipe-blanks.html