The lack of fusion between layers.
The lack of fusion between layers occurs due to low current and high welding speed. The lack of fusion between layers is the acceptable defect. The repair is re...
Author: Ivan Perfilyev
The defects found at the metals macro-analysis.
With the macro-analysis reveal defects that violate the metal continuity: The shrinkholes, gas blowholes, caverns, cracks in cast metal (slabs, moulding); The c...
The hardness measurement. The Rockwell hardness test method and microhardness (Part 2).
Irrespective the Rockwell’s scale which is used, the main process operations of the tests in essence don’t change and are provided below: The prepar...
The polymorphic transformations in metals (Part 5).
Upon the shift transition of one modification to another the atoms move to small distances, smaller interatomic. These movements are studied in cobalt in detail...
Welder Qualification Test (Part 6).
It is necessary to clearly understand the difference between the terms «attestation» and «certification» relating to testing for welders. When we say that the w...