Introduction
4J41 is a ferronickel-copper brazing alloy. Through the action of a certain amount of flux, the alloy achieves localized melting at a certain temperature to attach two components, usually metal components, to form a structural combination that is difficult to separate. 4J41 ferritic nickel-copper brazing alloy conforms to YB/T5237-1993.
Composition of 4J41
The chemical composition of ferronickel-copper brazing alloy 4J41 is confirmed and guaranteed: the mass fraction of Ni is not less than 38% and not more than 45%, the mass fraction of Mn is not more than 1.3%, the mass fraction of Si is not more than 1.8%, the mass fraction of Cu is not less than 51% and not more than 55.5%, the mass fraction of P is not more than 0.035%, and the residual mass fraction is Fe.
Performance and Use of 4J41 Alloy
The ferronickel-copper brazing alloy 4J41 has good overall performance. Compared with other alloys, it has excellent bonding strength, good plasticity and high electrical conductivity. It is suitable for brazing of carbon steel, car and motorcycle parts and other parts. It is also an ideal material for brazing of high frequency communication components and so on.
Methods and Equipment for 4J41 Alloy
The 4J41 ferronickel-copper brazing alloy can be brazed in a vacuum atmosphere, protective atmosphere, wind pressure, fluxless brazing and so on. According to the temperature and process required by the workpiece, appropriate brazing methods can be selected. Vacuum brazing needs to use vacuum furnace, AC hipot tester and other equipment, and its specific operation should be performed according to the process conditions of the brazing process.
Method for Controlling Quality and defects of 4J41 Alloy
Brazing quality of ferronickel-copper brazing alloy 4J41 is mainly affected by brazing temperature, brazing time and brazing atmosphere. Appropriate adjustment can be made to control the brazing quality. Generally, when brazing, it is necessary to pay attention to the selection of flux, control the diffusion range of flux, and ensure even melting. In addition, the selection of welding materials, welding body, welding gap size and other conditions are also important factors affecting the brazing quality of parts.
Conclusion
The ferronickel-copper brazing alloy 4J41 is characterized by good plasticity, electrical conductivity and bonding strength. It is suitable for brazing of car and motorcycle components and other components. The selection of brazing process, brazing temperature, brazing time, brazing atmosphere and other conditions will affect the quality of brazing, so it is necessary to make appropriate adjustment to control the brazing quality.
