Quenching Technology of Straight Seam Welded Pipe

Straight seam welded pipe surface quenching, tempering, heat treatment is usually carried out by induction heating or flame heating. The main technical parameters are surface hardness, local hardness and effective hardened layer depth. Hardness testing can use Vickers hardness tester, Rockwell or surface Rockwell hardness tester can also be used. When the surface heat treatment hardened layer is thick, Rockwell hardness tester can also be used.

If the parts require high local hardness, induction quenching and other methods can be used for local quenching heat treatment. In this case, the location and hardness value of the local quenching heat treatment should be marked on the drawing. Straight seam welded pipe hardness testing should be carried out in the designated area.

The three hardness values of Vickers, Rockwell and Surface Rockwell can be easily converted to each other and converted into standards, drawings or hardness values required by users.