In the steel pipe weld annealing, there are two types of steel pipe longitudinal welds and annealing on the weld welds, and the two methods have been described in detail. 1. A longitudinal direct weld annealing steel pipe longitudinal welds in the longitudinal direction of steel pipe is to refin...

Sensive annealing is cooled in air after the workpiece reaches an annealing temperature, so it is actually inductive normal fire, but it is used to annealing. Induction annealing is widely used in steel pipe weld annealing, recrystallization of reflections (such as high pressure tubing portions)...

1. Eliminate stress and normal tractor high pressure tubes are cold-headed expansion (20 steels), and also use induction normal fire to restore normal.

The main purpose of the induction quenching worker temper is to reduce quenching stress to avoid quenching cracks; sometimes, the tempering is to reduce the hardness of the workpiece technical requirements. The workpiece induces the temper after quenching, and there are generally three ways: