1. Quenching cracks in steel pipes
The quenching heating temperature of the steel pipe is too high, the heating time is too long, or the heating temperature is seriously uneven, which may easily cause quenching cracks. If the chemical composition of the steel pipe segregates, inclusions in the steel pipe may easily cause quenching cracks.
2. Overheating or overburning of steel pipes
If the quenching heating temperature of the steel pipe is too high or the heating time is too long, it is easy to cause overheating or overburning. In severe cases, the steel pipe will collapse.
3. The surface of the steel pipe is decarburized or severely oxidized.
When the steel pipe is heated, the surface is severely decarburized or severely oxidized, which is caused by improper control of the heating temperature and heating time or an imbalance in the air-fuel ratio adjustment.
Post time: Oct-20-2023