Metallography

Fractography

  • Microstructure examination
  • Electron probe microanalysis
  • Fractography – fracture surface analysis
  • Determination of area fraction of phases by means of image analysis
  • Measurement of grain size
  • Metallographic determination of non-metallic inclusion content
  • Microscopic measurement of layer thickness
  • Metallographic evaluation of the microstructure of cast iron
  • End quench hardenability tests
  • Measurement of hardness (in our laboratories and on site)
  • Macroscopic investigation of machine components

The metallographic laboratory is testing laboratory no. 1476 accredited by the Czech Accreditation Institute:


Equipment of the laboratory

  • Nikon and Carl Zeiss microscopes (50× – 1000× magnification), a fully-automatic motorized stage (for photographing large areas extending beyond a single field of view), software for digital processing of image and image analysis
  • Durascan automatic microhardness tester (Vickers scale HV 0.01 – HV10)
  • Instrumented nanoindentor - NanoTest Vantage: Load range: from 10 μN to 500 mN (resolution 3 nN)
  • JEOL scanning electron microscopes
  • Detectors: secondary electron (SE) detector, backscattered electron (BSE) detector, INCA detector for energy-dispersive spectrometry (EDS) from Oxford Instruments and HKL NORDLYS EBSD high-speed camera
  • Other equipment: ion-beam polisher for preparing specimens for scanning electron microscopy – analysis of grains and subgrains, low-angle and high-angle grain boundaries and texture and crystallographic identification of phases
Grains Weld
Microstructure of quenched and tempered steel etched to reveal prior austenite grain boundaries

Close-up view of weld

 

Macrograph
Longitudinal section through a specimen after physical simulation of thermomechanical treatment. Specimen length: approx. 15  mm; specimen width: 6  mm. This micrograph was taken using an optical microscope with an automatic stage and pasted together from 28 fields of view.

New US patent for COMTES FHT

Dec 11, 2018

A new US-patent was granted to COMTES FHT on December 11th 2018. ... more

New equipment in COMTES FHT a.s.

Nov 26, 2018

COMTES FHT a.s. extended the equipment of its workshop with a new facility - a five axis milling center. This new machining center improves the possibilities of producing complex shapes and strengthens the overall capacity of the workshop. ... more