Experts suggest that vacuum heat treatment and careful selection of cleaning procedures can prevent some appearance problems in gears. The addition of a media-blasting step immediately after heat treating can prevent corrosion and discoloration from persisting on parts during downstream processing. Media-blasting forms range from those that gently remove contamination to ones that change surface stress states with peening action or remove enough material to change part dimensions. Hand blasting also gives operators the control needed to prevent part damage, while high-volume blasting techniques, such as tumble blasting need to avoided. Another way to keep heat-treated parts clean is to use cleaner heat-treating processes and vacuum heat treating is one such process that is suitable for some parts.
|Number of pages||2|
|Specialist publication||Machine Design|
|Publication status||Published - 17 Feb 2011|