Analysis establishments and the manufacturing business rely on high quality management exams to make sure they’re utilizing passable supplies that meet trendy requirements. MSE Provides provides the DUROLINE M1/M2/M4 from Metkon Applied sciences, a sequence of automated and versatile hardness testers. These machines are able to conducting each Vickers and Knoop hardness exams, so they’re suitable with a powerful number of supplies.
Each exams are optical hardness exams and require just one indenter sort. A elegant / floor / prepped specimen is required for Vickers & Knoop to supply correct outcomes. The exams encompass a standardized load being utilized to a hard and fast level on the specimen; the ensuing indent is measured by the optical system after which a hardness is calculated relying on the depth of deformation. The DUROLINE sequence is able to a micro-load vary for HV/HK (Hardness Vickers/Knoop) scales from 10 grams-force (gf) to 1 kgf.
Your complete hardness vary is roofed by each exams, which means they’re each appropriate for onerous and mushy samples. Whereas Vickers and Knoop each measure hardness, they every provide distinctive benefits and one is normally preferential to the opposite relying on the specimen:
- Vickers exams use a diamond within the form of a sq. pyramid, and is mostly the popular check.
- Vickers’ indenter works finest for small, rounded samples, and is appropriate for testing very onerous supplies.
- Knoop exams use an indenter that’s 3 times so long as the Vickers, and penetrates half as deep for an an identical load; commensurately, Knoop exams exert a decrease load vary.
- Knoop exams excel at testing very skinny layers, like aluminum foil, and brittle supplies the place a Vickers check could crack the pattern; the longer space of the Knoop indenter results in larger precision measurements, notably at low check hundreds.
A comparability between the Knoop and Vickers indenter shapes will be seen beneath.
(Stenhagen, 2017)
The variations between the M1, M2, and M4 are neatly portrayed within the beneath graphic. For easy / low quantity testing, the extra options sported by the M4 could go unappreciated; nonetheless, the elevated high quality of life introduced on by a motorized stage and computerized focus ought to appear fairly enticing to knowledgeable lab with excessive throughput volumes. For a whole checklist of ordinary supply inclusions and options, please go to our retailer web page.
MSE Provides is glad to help you in figuring out one of the best hardness tester in your software wants; please don’t hesitate to contact us right this moment!
References
- Stenhagen, Ida, and Aida Mulic. “Hardness testing of dental supplies and tooth substance.” Nordic Institute of Dental Supplies. August twenty eighth, 2017. https://niom.no/hardness-testing-of-dental-materials-and-tooth-substance/
- “Knoop Vs. Vickers Microhardness Testers.” Clemex. July seventh, 2020. https://clemex.com/knoop-vickers-microhardness-testers/
