The material and strength of the steel bar have the following effects on the welding quality of the hob-welder:

1. Chemical composition: The differences in chemical composition of steel bars of different materials may affect the fusion performance and metallurgical reaction during welding. The different content of some alloying elements may lead to changes in the microstructure and properties of the welding zone. 2. Weldability: Some steel bars of some materials may have good weldability themselves, and it is easy to form good quality welds; And some special materials of steel bars may be more stringent welding process requirements.

The impact of strength: 1. Welding difficulty: high-strength steel bars require more precise process control when welding. If the welding parameters are improper, it may be difficult to achieve sufficient penetration and bonding strength. 2. Heat affected zone performance: The heat action during welding may cause changes in the strength, toughness and other properties of the heat affected zone of high-strength steel bars. If the control is not good, the performance of this area may decline, affecting the overall welding quality. 3. Residual stress: Large residual stress may be generated after welding of high-strength steel bars, which may cause deformation and cracking of welding parts if not handled properly.