How to detect the welding strength of laser welding diamond saw blade

How to detect the welding strength of laser welding diamond saw blade

For the laser welding of diamond saw blade, it is necessary to detect the appearance, microstructure and welding strength.

The appearance is mainly used to detect the presence of macro defects such as crack, hole welding undercut and incomplete penetration, usually needs to be tested 100%, significant microstructure is mainly used to detect the welding parts of the chemical composition, microstructure and phase structure changes, research shows that the melting zone group fine chemical composition gradient diffusion, transition the hardness of the layer lower than the substrate, than the knife head, showed a gradient. The welding strength is mainly used to detect the welding tensile strength, bending strength, impact toughness and residual stress, welding strength test usually requires 100%, and at home and abroad have developed special different inspection tools, such as Germany’s SPE623 welding strength testing machine and torque wrench China present for residual welding should be the basic force detection is not involved, and the residual stress after welding seriously affect the size and distribution of the service life of diamond saw blade.

At present, there are still some problems in the process of diamond saw blade by laser welding, we need to conduct further research, carry out special laser welding diamond saw or transition layer material formulation research, carry out new ultrafine or nano pre alloy powder, to carry out research study on the mechanism of laser welding diamond saw blade, especially the development of laser research on temperature field and flow field study on quality, field and stress field and carry out online quality monitoring of laser welding technology of diamond saw blade of diamond saw blade in the process of welding. In fact, only a full understanding of the mechanism of laser welding diamond saw blade, it may be developed online quality monitoring technology is new; only the master alloy powder theory, it may develop a new type of ultrafine or nano alloy powder and make better use of new ultra fine or nano pre alloy powder developed special diamond saw blade.