Methods for welding quality improvements

To establish welding parameters significance level and influence of welding parameters on occurrence of welded joints discontinuities and nonconformance it is necessary to perceive comprehensive welding parameters relationship as well as level of influence of each parameter. At present there are several tools for quality assurance and quality management of welded joints at disposal. Before all, there are Cause-and-Effect diagram, Cause-and-Effect matrix, Pareto diagram and Control charts. By appropriate application of this tools most influential parameters on quality of welded joints can be selected, which can be further, by application of Design of experiments methods as well as the other ways of parameters analysis, explored and optimal values of welding parameters obtained. Furthermore, paper provides an example of application of mentioned tools for obtaining optimal welding joint quality as a starting point for further numerical and other analysis and welding modeling.