The Gear Works commissions new Metallurgical Testing Center
Wednesday, October 14th, 2009
We are proud to announce the installation of a new microhardness test center that will greatly increase The Gear Works’ ability to quickly and accurately determine carburized case depths for case hardened gears. The accurate determination of heat treat case depth is critical information required for precision gear manufacture. This state-of-the-art test equipment, produced by the Struers Company, will provide quick, accurate and repeatable results that ensure our customer requirements are met.
The coupon is coded with appropriate manufacturing number and then heat treated along with each load of gears through the carburizing furnace. The coupon will then contain the same metallurgical properties as the heat treated gears it represents.
The coupon is then segmented using a special automatic wet saw which removes a suitable piece from the coupon for examination. The segmented, mounted sample is then processed in a special lapping machine to produce a mirror finish on the surface to be examined. The finished sample is suitable for examination in any reputable metallurgical laboratory.
The software employed with this unit creates micro-indentations with a calibrated Vickers indenter using load cell technology. The travel traverse of the indentations is predetermined in the set-up program as well as the specified case depth from the part surface. The testing machine then automatically measures the indentations and reports the case depth results. The test takes less than two minutes and is very accurate.
Evaluation results are programmed to meet ASTM requirements for microhardness testing. The Gear Works maintains each test result in a permanent file per its Quality Procedure 4.2.4.