Overview
1. Billet type: continuous casting round billet, rolling (forging) round billet, centrifugal casting round hollow billet, steel ingot
2. Continuous casting type: vertical continuous casting machine, arc continuous casting machine, horizontal continuous casting machine
3. Advantages of continuous casting slab: ① Simplified process and low production cost.
② High yield.
③The production conditions are improved and the degree of automation is high.
④ Save energy.
The continuous casting round billet is directly used in the production of seamless pipes. Because of its low cost and good quality, it has brought a profound revolution to the seamless steel pipe manufacturing industry. At present, steel ingots and rolled (forged) round tube billets have been gradually replaced to produce seamless steel pipes.
In order to improve the quality of seamless steel pipes, the first step is to ensure the quality of the billet.
Inspection and cleaning of billet defects
The quality of the billet has an extremely important influence on the quality of the steel pipe. Any billet that does not meet the quality requirements cannot be fed, and the surface defects of the billet must be cleaned.
1. Inspection method of billet quality:
①Visual inspection: surface quality
②Low-magnification structure: 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 billet surface defects:
①Flame cleaning: ≤0.4%c to clean the surface defects of the tube blank
② Air shovel cleaning: suitable for cleaning local defects on the surface of the tube billet
③Grinding wheel cleaning: mainly used for billets that are not suitable for flame cleaning
④Turning cleaning: It is mainly used for cleaning surface defects of tube blanks with high added value and quality requirements.
In short, the inspection and inspection of the quality of the billet and the necessary cleaning of the surface defects of the billet are the basic prerequisites to ensure that the blanks used in the production of seamless steel pipes meet the quality requirements.
1. Billet type: continuous casting round billet, rolling (forging) round billet, centrifugal casting round hollow billet, steel ingot
2. Continuous casting type: vertical continuous casting machine, arc continuous casting machine, horizontal continuous casting machine
3. Advantages of continuous casting slab: ① Simplified process and low production cost.
② High yield.
③The production conditions are improved and the degree of automation is high.
④ Save energy.
The continuous casting round billet is directly used in the production of seamless pipes. Because of its low cost and good quality, it has brought a profound revolution to the seamless steel pipe manufacturing industry. At present, steel ingots and rolled (forged) round tube billets have been gradually replaced to produce seamless steel pipes.
In order to improve the quality of seamless steel pipes, the first step is to ensure the quality of the billet.
Inspection and cleaning of billet defects
The quality of the billet has an extremely important influence on the quality of the steel pipe. Any billet that does not meet the quality requirements cannot be fed, and the surface defects of the billet must be cleaned.
1. Inspection method of billet quality:
①Visual inspection: surface quality
②Low-magnification structure: 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 billet surface defects:
①Flame cleaning: ≤0.4%c to clean the surface defects of the tube blank
② Air shovel cleaning: suitable for cleaning local defects on the surface of the tube billet
③Grinding wheel cleaning: mainly used for billets that are not suitable for flame cleaning
④Turning cleaning: It is mainly used for cleaning surface defects of tube blanks with high added value and quality requirements.
In short, the inspection and inspection of the quality of the billet and the necessary cleaning of the surface defects of the billet are the basic prerequisites to ensure that the blanks used in the production of seamless steel pipes meet the quality requirements.
