Ultrasonic hardness tester TKM-459C is a representative of the latest generation of measuring devices for non-destructive testing. The hardness tester is designed for operational measurement of the hardness of metals and metal products, including surface-hardened layers - carburizing, nitriding, hardening with high frequency current, etc. nuclear, oil and gas and others.

The principle of operation of the hardness tester - UCI method (ultrasonic contact impedance). Measurements are made in basic units of hardness HRC, HB, HV. It is also possible to control the scales HRA, HRB, HSD and ultimate strength (MPa, recalculation according to GOST 22791-77). The user can program his own scales.

Shock-resistant, dust- and moisture-proof housing allows you to operate the hardness tester in the most difficult industrial and field conditions.

The unique possibilities of statistical processing of the results in the process of measurements make the TKM-459S hardness tester irreplaceable when carrying out production and experimental work. The bright color graphic display ensures ease of use, even at subzero temperatures. The simple and intuitive interface of the device is designed according to the "plug and play" principle.

The main areas of application of the TKM-459C ultrasonic hardness tester:

• control of carbon and structural steels;
• control of hardening and other layers on steel products (carburizing, nitriding, HFC hardening, etc.);
• control of heat-resistant, corrosion-resistant, stainless and other steels;
• control of non-ferrous metals and alloys;
• control of surfacing and galvanic coatings (chrome, etc.);
• control of specialized cast irons;
• control of products made of fine-grained materials in the local study of the properties of materials.

The specialized system of statistical processing of measurement results implemented in the hardness tester allows for calculations during the measurement process and during the subsequent processing of the stored results in the device's memory.

Processing during measurements includes:

• maximum, minimum, mean, standard deviation from the mean;
• average deviation from the value set by the user, the number of results is more / less than the value, the maximum deviation up / down from the value;
• the number of results that go beyond the upper / lower limit of the range (set by the user), the maximum deviation from the upper / lower limit;
• automatic rejection of results, incorrect measurements;
• demonstration of all measurement results in a series.

Processing the results in the memory of the device allows you to:

• calculation of the average value, standard deviation;
• calculation of the maximum and minimum in the group of measurement results;
• calculations relative to the set values ​​of hardness;
• sampling of results relative to the set values ​​of hardness;
• building graphs on the display of the hardness tester: relative to the average value; user-defined value or range.

• The shockproof rubberized housing of the electronic unit provides protection against dust, moisture and mechanical stress.
• Bright color graphic display that retains performance at freezing temperatures.
• A system for statistical processing of measurement results, developed both for control in production conditions and for carrying out experimental work.
• Prompt correction of instrument readings by one or two exemplary hardness blocks.
• Prompt creation (programming) of additional calibrations using no more than two control samples.
• User programming of additional scales using from 2 to 10 control samples.
• Signaling of the measurement result exceeding the set limits
• Plug-and-play intuitive graphical interface.
• Flexible organization of memory for recording measurement results.
• Inspection in grooves and blind holes from 5 mm, as well as products of complex configuration, not provided by other devices.
• Stable readings regardless of the force and time of pressing the sensor to the controlled surface.
• Small influence of the deflection of the sensor from the normal to the controlled surface.
• Ultra-small area of ​​the control zone - from 1 mm.
• Hardness control of thin hardening coatings - carburizing, nitriding, HFC hardening, etc.
• Low sensitivity to the curvature of the product and the height of the irregularities.
• Possibility of equipping with additional replaceable sensors of various designs and loads, positioning devices.

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