Hardness Testing

摘要

Specifying the hardness of finished gears is just one way that gear engineers can ensure they are made of the right material and properly heat treated. However, a wide variety of hardness testing methods exists. Here is a brief introduction to those most commonly used in gear manufacturing. Rockwell. The Rockwell hardness test was invented in 1919 by Stanley R Rockwell, who developed his method as a nondestructive way to quickly, repeat-ably and reliably test the hardness of the bearing races made by his company. Like all of the other major testing methods, the Rockwell test determines hardness based on the results of an indentation test, wherein a hard material is pressed into the test piece under a specified load.