The application of low heat input CMT process in braze welding copper – high-alloy steel joints in various shielding gases

Abstract

Within the scope of this article, the issue of creating braze-weld joints of copper and high alloy steel is discussed in detail. The joints were made by using a low-energy CMT welding method and MIG with pulsing arc on a robotized set-up in argon and helium shielding. The results of visu- al, metallographic and strength test are presented. Based on them, it has been concluded that the CMT process al- lows for creating high quality joints, while requiring a lower heat input.

Keywords

• braze welding
• dissimilar joints
• low heat input welding methods
• CMT method