While porosity refers to the presence of holes and voids that can be discovered within an object such as a casting, more specific terms may be used to refer to voids that have a specific shape, are located in specific locations, or occur at specific frequencies. Because each defect and cause listed above has the potential to have an impact on the overall effectiveness of your product or part, it is important to consider both the severity of the defect or cause and the extent to which it has spread throughout the product or part.
In any case, we always set a goal of reducing the amount of porosity defects that are present in the final product or, if possible, eliminating them entirely. This entails investigating the various factors that contribute to the occurrence of defects. Despite the fact that porosity is sometimes present in die casting aluminum as a result of design considerations, materials used in design, manufacturing process, or a combination of these factors, porosity is not always present.
In addition, we are better able to understand your materials, designs, and parts because of our die casting expertise. Our ability to identify and understand the variables in the casting process that are most likely to cause various types of defects has also improved. This allows us to prevent many defects from occurring in the first place, thereby reducing the number of defects that occur. Additionally, if necessary, we can assist with the redesign of elements to address porosity-prone areas as well as the relocation of elements to locations that will not have an impact on structural integrity.
In most cases, a defect is discovered during the review process of a quality manufacturer and die casting service provider, though you may also discover a defect while machining the part. It is critical to document the location, frequency, and type of defect that exists in order to effectively resolve a problem.
Your collaborators should collaborate with you in order to determine the acceptable level of porosity in the material being used. When you become aware of a problem, communicate with your partner as soon as possible, providing as much information as you possibly can. It is preferable if you can share your casting with your partner in order to aid them in the defect resolution process.
If you need assistance developing your own tolerance limits for porosity in castings, the American Society for Testing and Materials (ASTM) has a list of standards for porosity in castings that you can consult. The American Society for Testing and Materials (ASTM) has made some of their standards available for free on Wikipedia — however, keep in mind that Wikipedia is not always completely accurate, so it is best to double-check these tolerances somewhere else before using them.
It is recommended that you contact us directly if you have any questions about the porosity of your casting.
Making the decision to combine the casting and machining processes was an excellent decision.
Transferring the casting through a number of partners before shipping may make zinc die casting products possible to avoid the need for machining entirely. This will save both money and time on machining and shipping costs in the long run. Liquid penetrant inspection of your casting using a machined die to detect porosity defects on the surface of your casting using liquid penetrant inspection, which is less expensive than x-ray testing and can be done without the use of a microscope, can save you money on testing while also saving you time and effort.
Using a sample from your first castings, we can check for porosity and identify any issues that may exist. This enables us to identify the underlying cause of the problem and re-gate the casting in order to correct the situation if necessary. Additionally, it gives you more time to determine what level of porosity is acceptable, what design changes you are willing to accept, and which options you would like to employ to improve the overall castability of the finished product.
The Wall