What do welders need to learn?
Release time:
2023-02-03
【Summary Description】 Welding learning What do welders need to learn? Welding theory comes from practical operation, and the summarized theory guides the operation. Only skill operation and theory are closely combined to do a good job of "welder". The theoretical knowledge of welding is very rich and extensive. Many electric welders know too little about welding knowledge in their initial work. Most welders only know the fur from some old masters in the process of passing on art. They only master a relatively single operation technology and do not know how to solve welding problems. Such as the use of carbon steel welding rod welding stainless steel material, it will cause the weld formation is very poor, which is due to the stainless steel material compared with carbon steel material thermal conductivity is poor, the arc formation of the molten pool is not easy to solidify. The second point, learn to master the knowledge of Welding materials The welding process will come into contact with a lot of metal materials, each material has its characteristics, such as the mechanical properties of metal materials have strength, plasticity, hardness, toughness, etc.; metal physical properties have density, melting point, thermal expansion, thermal conductivity, Electrical conductivity and magnetism. These are closely related to the welding process. Such as austenitic stainless steel in welding, due to its physical characteristics of thermal expansion coefficient, large deformation; poor thermal conductivity, weld appearance forming is difficult to control. Therefore, stainless steel welding should adopt small line energy, small current short arc welding, speed up the cooling rate, make it stay in the sensitized temperature zone for a short time, strictly control the interlayer temperature, prevent intergranular corrosion, reduce welding stress and deformation. Avoiding welding defects can also be analyzed from macro to micro combined with theoretical knowledge. For example, welding pores on the construction site are theoretically divided into three types: hydrogen pores, nitrogen pores and CO pores. Through the macro characteristics of the three types of pores, the on-site weld pores are identified and qualitatively identified. The on-site and welding conditions are analyzed in combination with the theoretical causes of qualitative pores, and the causes and overcoming measures are found to avoid the generation of pores. In this way, many on-site welding phenomena can be answered through the research and analysis of theoretical knowledge. At the same time, the development of Welding materials is endless, and welders need to study carefully in order to become a "senior welder".
welding learning
What do welders need to learn?
Welding theory comes from practical operation, and the summarized theory guides the operation. Only skill operation and theory are closely combined to do a good job of "welder".
The theoretical knowledge of welding is very rich and extensive. Many electric welders know too little about welding knowledge in their initial work. Most welders only know the fur from some old masters in the process of passing on art. They only master a relatively single operation technology and do not know how to solve welding problems.
Such as the use of carbon steel welding rod welding stainless steel material, it will cause the weld formation is very poor, which is due to the stainless steel material compared with carbon steel material thermal conductivity is poor, the arc formation of the molten pool is not easy to solidify.
The second point, learn to master the knowledge of Welding materials
The welding process will come into contact with a lot of metal materials, each material has its characteristics, such as the mechanical properties of metal materials have strength, plasticity, hardness, toughness, etc.; metal physical properties have density, melting point, thermal expansion, thermal conductivity, Electrical conductivity and magnetism. These are closely related to the welding process.
Such as austenitic stainless steel in welding, due to its physical characteristics of thermal expansion coefficient, large deformation; poor thermal conductivity, weld appearance forming is difficult to control.
Therefore, stainless steel welding should adopt small line energy, small current short arc welding, speed up the cooling rate, make it stay in the sensitized temperature zone for a short time, strictly control the interlayer temperature, prevent intergranular corrosion, reduce welding stress and deformation.
Avoiding welding defects can also be analyzed from macro to micro combined with theoretical knowledge. For example, welding pores on the construction site are theoretically divided into three types: hydrogen pores, nitrogen pores and CO pores. Through the macro characteristics of the three types of pores, the on-site weld pores are identified and qualitatively identified. The on-site and welding conditions are analyzed in combination with the theoretical causes of qualitative pores, and the causes and overcoming measures are found to avoid the generation of pores.
In this way, many on-site welding phenomena can be answered through the research and analysis of theoretical knowledge. At the same time, the development of Welding materials is endless, and welders need to study carefully in order to become a "senior welder".
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