With a new, extensively upgraded version of its DiaMet™ software, Buehler - (www.buehler.com) is now offering an internationally consistent and even more user-friendly solution for its Wilson® hardness testing systems. Designed for operation by mouse or touchscreen, the system offers expert users the required flexibility and broad feature set for planning, running, analyzing, documenting and archiving of individual measurements and measurement series, whilst at the same time enabling less extensively trained operators to work quickly and efficiently. The new version launched in January 2016 contains features designed to facilitate and accelerate specific applications, such as the documentation of the hardness distribution in welds, or the depth of hardening in induction-hardened workpieces or objects treated with conventional hardening processes. The new DiaMet software thus in every way fulfills the requirements for industrial hardness measurement in a production-related environment – an application requiring high precision along with a maximum degree of automation in handling extensive test programs.
DiaMet is optimized for evaluating Macro-Vickers, Micro-Vickers, Knoop and Brinell indents according to ISO 6507, ISO 4545, ASTM E384, ISO 6506 and ASTM E10, and is designed to work with all models of the current Wilson® VH and UH hardness tester series, as well as some legacy systems.
Fast testing of welds in compliance with relevant standards
The requirements for hardness testing of welds are documented in standards such as ISO 9015 and ISO 15614. These describe the test loads, number of indents in the parent material, in the heat affected zone (HAZ) and in the weld itself, as well as the distances between each indent and the depth below the surface of the welded joint. Fulfilling these test requirements traditionally necessitates a time-consuming setup and an experienced operator, not least due to the fact that no two weld samples are completely identical. The new version of the DiaMet testing software substantially facilitates this process. It guides the operator through the setup process by adapting a fixed test pattern to the sample in hand with only a few clicks – strictly in accordance with the standards. The software produces a graphical image of the complete weld, including indent positions and associated measurement values, which can be used in a test report.
Automatic test pattern positioning for hardened samples
Although the testing pattern for induction heated parts is typically straightforward, consisting of one or more continuous test rows, the geometry and alignment of these rows makes the measurement of the depth of hardening of induction heated parts a time-consuming process. The DiaMet software can now recognize any sample that has been tested before and apply the indent rows in the order defined during the first measurement. DiaMet automatically corrects for alignment of the part, thus eliminating the need for the operator to use fixtures or to perfectly align the sample. Initial user experience has shown that this may cut the time required for testing in half.
Customized documentation of surface hardening processes
DiaMet™ allows the hardness resulting from conventional surface hardening processes to be determined quickly and with high repeatability through standard measuring sequences. Thanks to the possibility of setting up and storing a virtually endless number of such programs for measuring case-hardening depth, the new DiaMet software provides unsurpassed flexibility. The latest version of the software now offers the ability to respond quickly to changing requirements, allowing standard programs to be adapted to changing requirements on the fly - for example by adding additional indents and/or complete test rows in order to gain higher resolution or increase the reliability of measurements. Conversely, the number of test rows can be scaled down with a simple touch or mouse click, for example when time is running short.
Geared towards international requirements
As an international software package offered in multiple languages, the current Wilson® DiaMet™ software addresses the requirements laid down in all relevant national and international hardness testing standards. Marcel van Banning, Product Manager Hardness at Buehler ITW Test & Measurement GmbH said: "DiaMet is synonymous to global thinking in hardness testing. Users in internationally operating organizations can now share and compare results worldwide – regardless of where the measurements were made. With this new release, we are providing test engineers with a tool enabling them to supply detailed and reliable results, even when work assignments are time sensitive. In addition, the high degree of automation enables even less extensively trained staff to conduct comprehensive test series and produce highly accurate results."
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