High-precision hand-held instrument equipped with brand-new software, designed for non-destructive testing of production quality. Targeted for use across a variety of industries including metallurgy, mechanical engineering, aircraft construction, shipbuilding, atomic industry, and oil and gas.
TQ-4Combi Plus combines the advantages of both UCI and Leeb methods for precise control of metals and alloys hardness.
Application
- Carbon and structural steels, along with other fine-grained materials.
- Hard-surfaced items treated with cementation, nitride hardening, or high-frequency current hardening.
- Heat-resistant, corrosion-resistant, and stainless steels.
- Non-ferrous metals and alloys such as cast iron, aluminum, bronze, and brass.
- Electroplated coatings like chrome, copper, nickel, zinc, and tin, as well as overlaying.
- Items of complex configuration including gear teeth, shafts, pipes of any diameter, grooves, and blind holes.
- Thin-walled and small-sized items.
- Large items and heavy-duty equipment like gas pipelines, rails, and construction elements.
Operational advantages
- Wide compatibility with various metals and alloys.
- Stable measurements unaffected by force or time of probe pressing.
- Low sensitivity to surface curvature and roughness.
- Ability to measure hardness in hard-to-reach areas with consistent accuracy.
- Wide range of compatible accessories for enhanced usability.
Features
- Impact-, dust-, and water-proof housing for durability in challenging environments.
- Bright color display for readability in below-zero temperatures.
- Signalization alerts for exceeding prescribed measurement thresholds.
- Unique statistical data processing system for accurate analysis.
- Quick calibration of device scales using one or two standard test blocks.
- Flexible device memory for efficient readings recording and analysis.
- Programming capabilities for additional calibrations with one or two standard test blocks.
- Fast setup of additional scales with two to ten standard test blocks.
Probes characteristics
| Photo | Probe Type/Load | Weight/thickness/ surface roughness of the article under check |
Length/ |
Application |
| UCI method | ||||
 |
«А»(HV5) 50N/5kg |
1kg/3mm/Ra 1,6 | 145/26mm | Solving of main hardness testing tasks |
| «H» (HV1) 10N/1kg |
1kg/2mm/Ra 0,8 | 145/26mm | Hardness testing of electroplated coating (chrome, copper, nickel, zinc, tin), thinwalled and small-sized items | |
| «С» (HV10) 100N/10kg |
1kg/4mm/Ra 3,2 | 145/26mm | Hardness testing of items with unprepared surface, large items and heavy-duty equipment | |
 |
«К»(HV5) 50N/5kg |
1kg/3mm/Ra 1,6 | 76/33mm | Hardness testing of inner surface of tubes, tanks and other hard-to-reach areas |
 |
«AL»(HV5) 50N/5kg |
1kg/3mm/Ra 1,6 | 190/26mm | Hardness testing in hard-to-reach areas as pinholes, grooves, in-between gear teeth zones (length of tip 65mm) |
| Leeb method | ||||
 |
«D» | 3kg/6mm/Ra 3,2 | 138/21mm | Solving of main hardness testing tasks with surface roughness less than 3.2Ra |
| «E» | 3kg/6mm/Ra 3,2 | 138/21mm | Probe with polycrystalline indenter made of cubic boron nitride to test materials with high hardness | |
 |
«G» | 8kg/55mm/Ra 7,6 | 200/29mm | Hardness testing of high structure inhomogeneity items with surface roughness more than 7.2Ra |
Exploitation
Requirements
| Preparation | UCI method | Leeb method |
| Need no additional preparation |
Weight 1kg or more
Thickness 2mm or more
|
Weight 5kg or more
Thickness 6mm or more
|
| Need to be fixed on the base plate |
Weight less than 1kg
Thickness less than 2mm
|
Weight less than 5kg
Thickness less than 6mm
|
| Roughness requirements | 0.8 – 3.2Ra (depending on probe) | 3.2 – 7.2Ra (depending on 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, and mean values, along with standard deviation.
- Average deviation from user-set values and maximum deviation.
- Number of results outside user-specified limits and maximum deviation from the upper/lower border.
- Automatic filtering of erroneous measurements.
- Comparison of measurement results in series using on-screen comparison charts.
Technical specifications
| 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 1mm on flat surface From 5mm in a slot |
| 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 |
| PC connection | USB |
| Power supply | Li-ion accumulation battery |
| Dimensions of hardness tester electronic unit | 121x69x41mm |
| Weight of electronic unit | 0.3kg |
| Weight of A-probe | 0.3kg |
| Weight of D-probe | 0.15kg |
| Operating temperature range | -15…+35 °C |
| Warranty | 1 year |
Accessories
- Replaceable probes of different construction and load.
- Special heads to simplify probe positioning on complex surfaces.
- Connection cables for seamless integration.
Probe D with connector
Probe E
Probe D
