Is the principle for determining the brazing temperature the same for different brazing materials?
Release time:
2023-01-09
【Summary Description】 For different brazing materials, the temperature range required to be higher than the melting point of the brazing material itself is different, and sometimes even lower than the melting point of the brazing material itself. For the brazing filler metal with strong interaction with the base metal, a new alloy will be formed due to the great change of its composition during the filling process. At this time, the brazing temperature should be determined according to the melting point of the new alloy formed in the brazing seam. Brazing temperature is too high, easy to cause the solder and the base metal interaction is excessive, resulting in the base metal corrosion, resulting in brittle metal layer, so that the mechanical properties of the joint deterioration, at the same time will make the base metal brittle. If the brazing heating temperature is low, the brazing material flow distribution and infiltration are insufficient, so that the joint gap is not easy to be filled, thus forming a bad joint. In addition, for some brazing methods (such as furnace brazing, etc.), the requirements of the material heat treatment specification should also be taken into account when determining the brazing temperature, so that the brazing and heat treatment processes can be completed in the same heating and cooling cycle. This not only saves man-hours, but also avoids the possible adverse consequences of post-weld heat treatment.
For different brazing materials, the temperature range required to be higher than the melting point of the brazing material itself is different, and sometimes even lower than the melting point of the brazing material itself. For the brazing filler metal with strong interaction with the base metal, a new alloy will be formed due to the great change of its composition during the filling process. At this time, the brazing temperature should be determined according to the melting point of the new alloy formed in the brazing seam.
Brazing temperature is too high, easy to cause the solder and the base metal interaction is excessive, resulting in the base metal corrosion, resulting in brittle metal layer, so that the mechanical properties of the joint deterioration, at the same time will make the base metal brittle.
If the brazing heating temperature is low, the brazing material flow distribution and infiltration are insufficient, so that the joint gap is not easy to be filled, thus forming a bad joint.
In addition, for some brazing methods (such as furnace brazing, etc.), the requirements of the material heat treatment specification should also be taken into account when determining the brazing temperature, so that the brazing and heat treatment processes can be completed in the same heating and cooling cycle. This not only saves man-hours, but also avoids the possible adverse consequences of post-weld heat treatment.
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