- Description
- Exploitation
- Technical specifications
- Delivery set
- Additional equipment
Rebound (Leeb) hardness tester TQ-3C intended for quick measuring of metal items in laboratorial, manufacturing and field conditions.
Device is intended for non-destructive testing of production quality in metallurgy, mechanical engineering, aircraft, shipbuilding, atomic industry, oil and gas industry.
Hardness tester functions by Leeb method.
TQ-3C controls hardness of following:
- All basic types of metals and alloys without additional calibrations (structural, tool, corrosion-proof, heat-proof, non-corrosive steels and alloys as well as alloys of nonferrous metals, castiron, aluminium, bronze, brass);
- Items with surface hardening and high frequency current hardening;
- Items of complicated configuration;
- Heavy and big items with rough surface.
Exploitation advantages
– Wide range of controlled metals and alloys.
– Low sensitivity to the curvative and roughness of surface.
– Monitoring of hardness change along the surface.
– Stable measurements independent from force and time of pressing the probe to the surface.
– Possibility of material identification in blank production.
– Control of “volumetric” hardness.
Features of TQ-3C
- Impact-, dust- and water- proof housing.
- Bright color display allows working at below zero temperature and stays bright at any lighting.
- Signalization of exceeding of prescribed readings threshold.
-
Unique system of statistic data processing and averaging of readings.
- Fast adjustment of readings and programming of additional calibrations to basic scales by 2 or less standard blocks.
- Flexible device memory for recording of readings and their analysis.
- Programming of additional scales calibrations of hardness tester by 2 or less standard test blocks.
- Fast programming of additional scales by 2 to 10 standard test blocks.
Probes characteristics
| Photo | Probe Type | Weight/thickness/ surface roughness of the article under check |
Length/ |
Application |
 |
«D» | 3 kg/6 mm/Ra 3,2 | 138/21 mm | Solving of main hardness testing tasks with surface roughness less than 3.2 Ra |
| «E» | 3 kg/6 mm/Ra 3,2 | 138/21 mm | Probe with polycrystalline indenter made of cubic boron nitride to test materials with high hardness | |
 |
«G» | 8 kg/55 mm/Ra 7,6 | 200/29 mm | Hardness testing of high structure inhomogeneity items with surface roughness more than 7.2 Ra |
Requirements to controlled item:
- Items heavier than 5 kg and thicker than 6 mm need no additional preparation.
- Hard items (eg tubes) with awaited hardness from 90 to 250 HB and thicker than 4 mm need no additional preparation.
- Other items should be fixed on a support plate by fixing paste.
- Roughness of controlled surface providing best measurement accuracy depends on a probe.
Hardness testers modes
| Measurement mode | Readings | Using |
| By basic scales | Basic hardness units (HRC, HB, HV) | Hardness testing of the bulk of products |
| By additional calibrations to basic scales | By HRA, HRB, HSD scales and ultimate tensile strength | Hardness testing of high-alloy steels, special cast iron and nonferrous metals |
| By additional scales | Scales are programmed by the user | Special problems solving |
The parameters of the statistical processing of measurements
- Maximum, minimum, mean value, standard deviation from the mean.
- The average deviation from the values set by a user, results are more/less the values, the maximum deviation in the large/smaller side of the value.
- Number of results outside the upper/lower limit of range (user specified), maximum deviation from the upper/lower border.
- Automatic garbage results, incorrect measurement.
- Comparison of results of measurements in the series (the comparison charts on the display of the hardness tester).
| Characteristic | Values |
| Relative average error at regular calibration | 3-5 % |
| Hardness testing ranges: | |
| Rockwell C | 20-70 HRC |
| Brinell | 90-450 HB |
| Vickers | 240-940 HV |
| Spot diameter on the item surface for probe positioning | From 7 mm |
| Quantity of possible additional scales calibrations | 5 for each scale |
| Quantity of additional scales | 3 |
| Duration of the measurement | 2 seconds |
| Quantity of measurements for average reading calculation | 1-99 |
| Memory capacity | 12 400 readings |
| Maximum quantity of named blocks of readings generated in memory | 100 |
| Signalization about threshold exceeding | Provided |
| PC connection | USB |
| Power supply | Li-ion accumulation battery |
| Dimensions of hardness tester electronic unit | 121x69x41 mm |
| Weight of electronic unit | 0.3 kg |
| Weight of D-probe | 0.15 kg |
| Operating temperature range | -15…+35 °C |
| Warranty | 1 year |
| Elements | Leeb Hardness tester TQ-3C |
Leeb Hardness tester TQ-3C special |
| Electronic unit with accumulation battery | + | + |
| D-type probe | + | |
| Special probe type-D with socket | + | |
| Connecting cable for D-type probe | 2 pcs | |
Adapter “Z3” |
+ | |
| Standard test block HB | + | |
| Charger | + | + |
| Operating manual | + | + |
| PC cable | + | + |
| Soft case | + | + |
| Cuff to fix device on arm | + | + |
| Bag for carrying and storing | + | + |
ACCESSORIES
- Replaceable probes of different construction and impact force
- Adapter “Z3” for easier probe positioning on complex surfaces
- Connection cables
Probe D with connector for hardness tester TQ-3C
Probe D with connector is a replaceable probe for Leeb Hardness tester TQ-3C.
The probe with socket is purposed to solve main problems of hardness control of metals and alloys.
Probe D with socket allows the user to replace the cable if necessary.
Probe D is used for hardness testing:
- All basic types of metals and alloys without additional calibrations (structural, tool, corrosion-proof, heat-proof, non-corrosive steels and alloys as well as alloys of nonferrous metals, castiron, aluminium, bronze, brass);
- Items with surface hardening and high frequency current hardening;
- Items of complicated configuration;
- Heavy and big items with rough surface.
Advantages of Leeb probe
- Hardness measurement in hard-to-reach areas.
- The spatial position of the probe does not affect the measurement result.
- The robust housing is not subject to mechanical stress.
- Long service life.
Probes characteristics
| Photo | Probe Type | Weight/thickness/ surface roughness of the article under check |
Length/ |
Application |
 |
«D» | 3 kg/6 mm/Ra 3,2 | 138/21 mm | Solving of main hardness testing tasks with surface roughness less than 3.2 Ra |
| «E» | 3 kg/6 mm/Ra 3,2 | 138/21 mm |
Probe with polycrystalline indenter made of cubic boron nitride to test materials with high hardness
|
|
 |
«G» | 6 kg/55 mm/Ra 7,6 | 200/29 mm | Hardness testing of high structure inhomogeneity items with surface roughness more than 7.2 Ra |
ATTENTION! Probe should be adjusted to the electronic unit by the manufacturer.
Probe E for hardness tester TQ-3C
Probe E is a replaceable probe for Leeb Hardness tester TQ-3C.
Probe with indenter made of polycrystalline of boron nitride intended for control of materials with high hardness.
The Probe E is used for hardness testing:
- All basic types of metals and alloys without additional calibrations (structural, tool, corrosion-proof, heat-proof, non-corrosive steels and alloys as well as alloys of nonferrous metals, castiron, aluminium, bronze, brass).
- Items with surface hardening and high frequency current hardening.
- Items of complicated configuration.
- Heavy and big items with rough surface.
Advantages of Leeb probe
- Hardness measurement in hard-to-reach areas.
- The spatial position of the probe does not affect the measurement result.
- The robust housing is not subject to mechanical stress.
- Long service life.
Probes characteristics
| Photo | Probe Type | Weight/thickness/ surface roughness of the article under check |
Length/ |
Application |
 |
«D» | 3 kg/6 mm/Ra 3,2 | 138/21 mm | Solving of main hardness testing tasks with surface roughness less than 3.2 Ra |
| «E» | 3 kg/6 mm/Ra 3,2 | 138/21 mm |
Probe with polycrystalline indenter made of cubic boron nitride to test materials with high hardness
|
|
 |
«G» | 6 kg/55 mm/Ra 7,6 | 200/29 mm | Hardness testing of high structure inhomogeneity items with surface roughness more than 7.2 Ra |
ATTENTION! If you buy only Probe E, the Hardness tester TQ-3C should be sent to the retrofit and alignment.
Probe D for hardness tester TQ-3C
Probe D is included in the Basic delivery set of the Leeb Hardness tester TQ-3C.
The Probe D is used for hardness testing:
- All basic types of metals and alloys without additional calibrations (structural, tool, corrosion-proof, heat-proof, non-corrosive steels and alloys as well as alloys of nonferrous metals, castiron, aluminium, bronze, brass);
- Items with surface hardening and high frequency current hardening;
- Items of complicated configuration;
- Heavy and big items with rough surface.
Advantages of Leeb probe
- Hardness measurement in hard-to-reach areas.
- The spatial position of the probe does not affect the measurement result.
- The robust housing is not subject to mechanical stress.
- Long service life.
Probes characteristics
| Photo | Probe Type | Weight/thickness/ surface roughness of the article under check |
Length/ |
Application |
 |
«D» | 3 kg/6 mm/Ra 3,2 | 138/21 mm | Solving of main hardness testing tasks with surface roughness less than 3.2 Ra |
| «E» | 3 kg/6 mm/Ra 3,2 | 138/21 mm |
Probe with polycrystalline indenter made of cubic boron nitride to test materials with high hardness
|
|
 |
«G» | 6 kg/55 mm/Ra 7,6 | 200/29 mm | Hardness testing of high structure inhomogeneity items with surface roughness more than 7.2 Ra |
ATTENTION! If you buy only Probe D, the Hardness tester TQ-3C should be sent to the retrofit and alignment.
Probe G for hardness tester TQ-3C
Probe G of increased overall dimensions and impact energy (relative to the probe “D”).
Is used to control materials with high structural heterogeneity (cast iron, bronze) at high surface roughness.
Can be used only at the hardness less than 450 HB.
The Probe G is used for hardness testing:
- All basic types of metals and alloys without additional calibrations (structural, tool, corrosion-proof, heat-proof, non-corrosive steels and alloys as well as alloys of nonferrous metals, castiron, aluminium, bronze, brass);
- Items with surface hardening and high frequency current hardening;
- Items of complicated configuration;
- Heavy and big items with rough surface.
Advantages of Leeb probe
- Hardness measurement in hard-to-reach areas.
- The spatial position of the probe does not affect the measurement result.
- The robust housing is not subject to mechanical stress.
- Long service life.
Probes characteristics
| Photo | Probe Type | Weight/thickness/ surface roughness of the article under check |
Length/ |
Application |
 |
«D» | 3 kg/6 mm/Ra 3,2 | 138/21 mm | Solving of main hardness testing tasks with surface roughness less than 3.2 Ra |
| «E» | 3 kg/6 mm/Ra 3,2 | 138/21 mm |
Probe with polycrystalline indenter made of cubic boron nitride to test materials with high hardness
|
|
 |
«G» | 6 kg/55 mm/Ra 7,6 | 200/29 mm | Control of items with high structural heterogeneity (cast iron, bronze) and surface roughness Ra from 3.2 to 7.6 |
ATTENTION! If you buy only Probe G, the Hardness tester TQ-3C should be sent to the retrofit and alignment.