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Portable Leeb Hardness Tester by Metallography Supplies

Portable Leeb Hardness Tester  by Metallography Supplies

Portable Leeb Hardness Tester by Metallography Supplies

Portable Leeb Hardness Tester

Portable Leeb Hardness Tester - by Metallography Supplies a Metallography World Corporation

The Leeb rebound hardness test method was developed in year 1975 by Leeb and Brandestini at Proceq SA to provide a portable hardness test for metals. It was developed as an alternative to the unwieldy and sometimes intricate traditional hardness measuring equipment. The first Leeb rebound product on the market was named “Equotip”, a phrase which still is used synonymously with “Leeb rebound” due to the wide circulation of the “Equotip” product.

Traditional hardness measurements, e.g., those of RockwellVickers, and Brinell, are stationary, requiring fixed workstations in segregated testing areas or laboratories. Most of the time, these methods are selective, involving destructive tests on samples. From individual results, these tests draw statistical conclusions for entire batches. The portability of Leeb testers can sometimes help to achieve higher testing rates without the destruction of samples, which in turn simplifies processes and reduces cost.

Method

The traditional methods are based on well-defined physical indentation hardness tests. Very hard indenters of defined geometries and sizes are continuously pressed into the material under a particular force. Deformation parameters, such as the indentation depth in the Rockwell method, are recorded to give measures of hardness

According to the dynamic Leeb principle, the hardness value is derived from the energy loss of a defined impact body after impacting on a metal sample, similar to the Shore scleroscope. The Leeb quotient (i,vr) is taken as a measure of the energy loss by plastic deformation: the impact body rebounds faster from harder test samples than it does from softer ones, resulting in a greater value 1000×vr/vi. A magnetic impact body permits the velocity to be deduced from the voltage induced by the body as it moves through the measuring coil. The quotient 1000×vr/vi is quoted in the Leeb rebound hardness unit HL.

While in the traditional static tests the test force is applied uniformly with increasing magnitude, dynamic testing methods apply an instantaneous load. A test takes a mere 2 seconds and, using the standard probe D, leaves an indentation of just ~0.5 mm in diameter on steel or steel casting with a Leeb hardness of 600 HLD. By comparison, a Brinell indentation on the same material is ~3 mm (hardness value ~400 HBW 10/3000), with a standard-compliant measuring time of ~15 seconds plus the time for measuring the indentation.[2]

Scales

Depending on the probe (“impact device”) and indenter (“impact body”) types that vary by geometry, size, weight, material and spring force, diverse impact devices and hardness units are distinguished, e.g.:

  • Equotip impact device D with hardness unit HLD
  • Equotip impact device G with hardness unit HLG

Generally, impact device types are optimized for certain application fields. This is similar to using various indenter geometries and test loads in Rockwell (e.g. HRA, HRB, HRC), Brinell and Vickers. Leeb hardness results in HL are often converted to the traditional hardness scales HRC, HB and HV mainly for convention reasons between supplier and customer.

Brand: Metallography World Corporation Model: PHT-LB-10S
Product Overview     MH 100 series pocket hardness tester, also known as pen type hardness tester, based on Leeb hardness measuring principle, quick and easy on site test the hardness of series metal materials, support free conversion between Leek, Brine , Rockwell hardness scale and others,integ..
Brand: Metallography World Corporation Model: PHT-LB-18S
Product Overview MH180 portable Leeb hardness tester, based on Leeb hardness measuring principle, quick and easy, on site test the hardness of series metallic materials, support free conversion between Leeb, Brine, Rockwell hardness scale and others, it uses high contrast segment LCD to display, sma..
Brand: Metallography World Corporation Model: PHT-LB-31S
Product Overview MH310 portable Leeb hardness tester, based on Leeb hardness measuring principle, quickly and easily on-site test the hardness of series meta materials, support free conversion between Leek, Brine , Rockwell hardness scale and others, it uses high contrast segment LCD to display clea..
Brand: Metallography World Corporation Model: PHT-LB-32S
Product Overview MH320 portable Leeb hardness tester is based on Leeb hardness measurement principle, it can be quickly and easily used for on-site testing hardness of metallic materials and support free conversion between Leeb, Brinell, Rockwell hardness and other scales. It uses 128 × 64 dot matri..
Brand: Metallography World Corporation Model: PHT-LB-60S
Product Overview MH600 portable Leeb hardness tester, intelligent design can be used quickly and easily for on-site testing of meta hardness IP65 protection, can effectively prevent oil, dust and other corrosion in harsh fie d environments; with color LCD display, it. can also display clear testing ..
Brand: Metallography World Corporation Model: PHT-LB-66S
Product Overview MH660 portable Leeb hardness tester is Metallurgical Supplie's latest upgrade model,it focuses on user experience and innovative features.Using 320 x 240 color LCD display,can also present clear measurement results in dim light and strong sunlight environment,greatly enhance the vis..
Brand: Metallography World Corporation Model: HT‐PL‐1
      PORTABLE LEEB HARDNESS TESTER   Features: 1. LCD display of 128×64 matrix is used. 2. Hardness scales (HV, HB, HRC, HRB, HRA, HS). 3. RS232 / ..
Brand: Metallography World Corporation Model: HT‐PLA‐2
PORTABLE LEEB HARDNESS TESTER 2   Features: 1. Full metal shell design, sturdy, portable, high reliability; 2. Test at any angle, even upside down; 3. Has a starting value calibration function, ensure the data is applicable and accurate in ..
Brand: Metallography World Corporation Model: HT‐DPL‐3
DIGITAL LEEB HARDNESS TESTER WITH PRINTER    Features: 1.Large screen(128×64 dot matrix LCD), showing all functions and parameters. 2.Test at any angle, even upside down. 3.Support "forged steel (Steel)" material, when using the D/DC impact..
Brand: Metallography World Corporation Model: HT‐PLC‐L4S
PORTABLE LEEB HARDNESS TESTER COLOR SCREEN   Features: 1. Window menu style, true color display; 2. Easy to operate; 3. Test at any angle, even upside down; 4. Has a starting value calibration function, ensure the data is applic..
Brand: Metallography World Corporation Model: HT‐PL‐L5
PORTABLE LEEB HARDNESS TESTER   Features: 1. Built-in printer, can print testing results any time; 2. Window menu style, true color display; 3. Two hardness scale dual-display in same time; 4. Add customized material function, ..
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