Someone recently suggested to their aluminum-brazing client that they should conduct a high-temperature burnout cycle in their vacuum furnace by “heating the furnace to 1600°F to ensure that all the oxides are removed.
Some people think they can tell if a part broke due to hydrogen embrittlement by looking at it. This is not correct. The timing of the crack is only one of the key factors that needs to be documented if hydrogen embrittlement is suspected.
Time waits for no man. Time cannot be saved. Time only moves on, even as we speak. The process temperature will determine what microscopic transformation will occur (including grain growth). Transformation is the resulting metallurgical effects of the process time and temperature selected.
Most of us have heard someone complaining, “There’s a lack of critical thinking here.” But what do they usually really mean? If we stop for a moment, perhaps we will realize that it often means, “I disagree with your conclusion.” But does that mean that the thought processes used were inadequate?
Temperature uniformity within a furnace can be defined as: “a uniform temperature set to operate within a specific tolerance band to create conditions under which a final uniform resulting metallurgy will be accomplished in the treated component.”
A common way to create brazing filler metal (BFM) powder is by melting the raw metallic ingredients for the BFM in a large melting pot using induction heating and then pouring that alloyed liquid metal through a specialized atomization nozzle.
For those of us who would like to gain high-level competence in any profession, it’s critical to explore many of the branches of the tree of knowledge. If you are helping others solve technical problems, deep knowledge in the advertised subject matter is required. Communication skills serve as one example of a crucial additional area of required expertise.
Nickel-brazing is unique in the brazing world in that each of the nickel-based brazing filler metals (BFMs) available for use today depends on the use of temperature-lowering ingredients (i.e., temperature-depressants) such as boron, phosphorus and/or silicon to enable the BFM’s usefulness for joining stainless steels and many other superalloys for critical aerospace applications.