Question
HOW ARE DEFFECTS OF WELDS? HOW ARE IMPACTS OF SUCH JOINTS? COULD PRODUCTS OF KIM TIN GROUP ENSURE NO DEFFECT IN WELDS?


Answer
Errors of form, size and metal distribution of welding structure in comparison with design standards and technical requirements that reduce strength and working capacity of such structure are called welding defects.  Read more

Question
WHAT IS A CRACK? HOW TEMPERATURE AT WHICH THE CRACK OCCURS? HOW SUCH CRACK IS DISCOVERED?


Answer
A crack is one of most serious defects of welded connection. It may occur on surface or inside a weld as well as in thermal influence area.

The crack may arise at different temperatures:  Read more

Question
WHAT IS BLOWHOLE?


Answer
Blowhole is a phenomenon in which the air in weld metal cannot release when such weld metal becomes solid.
Blowhole may appear inside or on surface of a weld, or focus or disperse inside a weld.
The existence of blow hole in a weld diminishes working section, load bearing strength and tightness of welded connection. Read more

Question
BLOW HOLE – CAUSES AND REMEDIES


Answer
Cause Remedy
· Carbon content in basic metal or workpiece is so high.
· Welding materials get humidity and surface of welding components is dirty, oily, rusty, vaporous,… during welding
· Arc length is excessive and welding speed is high

 Read more

Question
WHAT IS SLAG MIXTURE?


Answer
Slag mixture is a defect, which is easy to occur in welds, weld slag and non-metallic impurities. It may appear on surface of welds or at root of welds…
Any weld with slag will influence significantly on impact strength and flexibility of weld metal and decrease working capacity of welded connection under dynamic load. Read more

Question
NON-SUBMERGENCE – CAUSES AND REMEDIES WHAT IS NON-SUBMERGENCE?


Answer
Non-submerged welding is a serious defect in welded connection that may cause cracks.
Non-submerged welding occurs in an angle of a weld, a welding edge or in middle of weld layers. Welding structure is mostly destroyed by non-submerged welding. Read more