GE USLT Series Brochure
Contents
1. 04 We reserve the right to technical modifications without prior notice2. GE Inspection Technologies Ultrasonics Krautkramer Software Program Module EHT for nondestructive measurement of hardness penetration depth gt Krautkr mer USLT 2000 ersion 2 1 1 105 x File Job View Setup Report Help S OL Ulla iA AJA A Hardness depth Ea Gain dB Step 05dB Actual s5 dB Reference Magnify Compare i 3 8mm 5 6mm 7 4mm 9 1mm 0 20 y Freeze Delay 5 7 mm Range 14 3 mm Threshold 50 0 21 x Ea Tajo Reet Depth range 100 63 2 0 10 1000 100 es L 10 r Hardness depth 7 3 mm Hardness depth 7 3 mm ha A PLUS for the USLT 2000 The software program EHT is an additional module for the ultrasonic test system USLT 2000 that can be easily installed as an optional Plug In This additional software extends the range of functions of the USLT 2000 new fields of applica tion are opened up The EHT module effective hardening depth is used for the nondestructive measurement of hardness penetration depths of thermally hardened steels The method presents numerous benefits The aspect of economic efficiency plays an important part especially when com pared with the conventional destructive tests Moreover the EHT module enables to carry out quite a large number of measurements without any problem GElInspection Technologies com The method The nondestructive determination of hard ness penetration depths is carri
3. ed out according to the ultrasonic backscatter method This method makes use of the fact that the mean grain size is reduced by the hardening process If an ultrasonic wavelength Is selected which is just a little larger than the grain size in the hardened area and somewhat smaller than the grain size in the base material scatter indications from the transition area can be measured and consequently also the hardness penetra tion depth A quick and easy evaluation is possible using the EHT software Firstly the char acteristic of the scatter indications is smoothed and then the hardness pen etration depth is recorded on the basis of the variable threshold value The applications The method works reliably with most of the thermal hardening methods for ex ample with flame hardening and induc tive hardening The following fields of application are presented for the EHT module e Production control in hardening shops e Incoming inspection within the auto motive industry shipbuilding aircraft construction within the general mechanical engineering for example on hardened camshafts crankshafts hydraulic cylinders For different applications the probe must be adapted to the geometry and the frequency must be adapted to the micro structure of the material to be tested GE imagination at work AGFA gy NDT HOCKING Krautkramer SEIFERT 2004 General Electric Company All rights reserved GEIT 20035GB 09
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