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Portable Rockwell Hardness Tester | XLHomeImprovementBlog.com

Two Techniques for Using a Portable Rockwell Hardness Tester

Posted on 26. Aug, 2014 by in Construction

Portable Rockwell Hardness Tester | XLHomeImprovementBlog.comTesting the hardness of metallic materials is crucial to many industries. Just as important is the way this testing is conducted. A portable rockwell hardness tester is a digital instrumentation of this process. Portable hardness testers are compact and menu driven. They are easy to use for nearly any type of application. Since emerging in their most powerful form in the late 1990s, they have provided the industry with an accurate form of hardness testing that requires little time and effort.

There are two fundamental techniques that are accepted by the field of hardness testing. The first method employed when using a portable tester is Dynamic Impact. It was founded upon the Leeb principle of hardness, which was developed by Dietmar Leeb during the 1970s. An impact body that is spring loaded thrusts into the metallic test surface. This act affects the rebound. A non-contact mode is used to measure the speeds of the initial thrust and rebound. Itautomatically converts to Shore, Vickers, Brinell, Rockwell B and C values after being calculated as a Leeb hardness value. This method is incredibly easy to use and has brought quick, accurate results to the practice of portable hardness testing.

The next technique used with a portable rockwell hardness tester is the Ultrasonic Contact Impedance. In this practice, a 136-degree diamond located on the end of a vibrating shaft is depressed into the metal at a fixed load. The hardness value is calculated by using the dissimilarity in Ultrasonic vibration frequency. Slower than the Dynamic Impact procedure, the UCI method is still simple, accurate and portable. Despite the lower level of quickness, the UCI technique does have its own advantages in certain testing circumstances. For instance, UCI testers are not limited to large mass items. The units can test materials as thin as 1mm with a hardness value that reaches as low as 20 HRC. One reason this method works well with a portable rockwell hardness tester is that it produces less scrap components and reduced mfg costs.


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