CATEGORIES

    Turret Microhardness Tester

    Overview Knowledge Standards Terms
    The turret microhardness tester applies a fixed load on the sample surface through a diamond indenter to form an indentation. The optical system measures the diagonal length of the indentation, and the hardness value of the material is calculated according to the formula. It is used to detect the hardness characteristics of small areas such as metals and coatings, and is suitable for quality evaluation of heat-treated parts and electroplated layers.
    Selection
    When selecting a turret microhardness tester, it is essential to match the hardness range of the material. For conventional samples, a load range of 1–50 kgf is recommended, while thin coatings require micro-loads of 0.01–1 kgf. The observation system should be equipped with a measuring objective lens of 400× magnification or higher, and a digital display is preferable for easier reading. The instrument body should include a vibration-damping mechanism and comply with the GB/T4340 standard. Prioritize models with an automatic turret and CCD camera functionality.
    type

    Terms

    Inverted Biological Microscope
    Biological microscope
    Coating Hardness Tester
    Pendulum hardness tester
    Polarizing Microscope
    Transmission electron microscope
    Laboratory Optical Microscope
    Inverted microscope
    Brinell Hardness Tester
    Optical high-power microscope

    Standards

    Active GB/T 45125-2025
    Determining of the softening point of phenolic resin for digita printing material—Microscopic meltingpoint melthod
    Active GB/T 12832-2008
    Rubber-Determination of crystallization effects by hardness measurements
    Active GB/T 2411-2008
    Plastics and ebonite - Determination of indentation hardness by means of a duronmeter(shore hardness)
    Active GB/T 3398.1-2008
    Plastics - Determination of hardness - Part 1: Ball indentation method
    Active GB/T 3398.2-2008
    Plastics - Determination of hardness - Part 2:Rockwell hardness
    Active GB/T 16582-2008
    Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods
    Active GB/T 39693.4-2025
    Rubber, vulcanized or thermoplastic—Determination of hardness—Part 4: Indentation hardness by durometer method (Shore hardness)
    Active GB/T 39693.2-2025
    Rubber, vulcanized or thermoplastic—Determination of hardness—Part 2: Hardness between 10 IRHD and 100 IRHD
    Active GB/T 3903.4-2017
    Footwear—Test methods for whole shoe—Hardness
    Active GB/T 231.1-2018
    Metallic materials — Brinell hardness test — Part 1: Test method
    Active GB/T 230.1-2018
    Metallic materials—Rockwell hardness test—Part 1：Test method
    Active GB/T 37900-2019
    Test method of hardness and fracture toughness for ultra-thin glass—Low-load vickers hardness indentation method
    Active GB/T 24523-2020
    Metallic materials—Test method for rapid indentation (Brinell type) hardness testing
    Incoming GB/T 43432.1-2025
    Metallic materials—Barcol hardness test—Part 1: Test method
    Active GB/T 531.2-2009
    Rubber, vulcanized or thermoplastic - Determination of indentation hardness - Part 2: IRHD pocket meter method

    Articles

    Shore Durometer Selection: Matching Principles of Hardness Models and Measurement Ranges
    This article introduces the selection method for Shore durometers, with the core focus on ensuring that the hardness type matches the material's hardness range and rebound characteristics. When selecting, the principle that the measured value falls within 20% to 80% of the full scale should be followed to avoid data distortion.
    Advantages of Barcol Hardness Tester in Rapid On-site Coating Hardness Testing
    The Barcol hardness tester is a portable device suitable for rapid on-site measurement of coating hardness. It determines the hardness value by measuring the depth of penetration of the indenter, offering simple operation and test completion within seconds.
    Brinell hardness tester is used for hardness testing of plastics and soft metal coatings.
    This article introduces how a Brinell hardness tester is used to measure the hardness of plastics and soft metal coatings.
    Shore hardness tester measures the hardness of rubber sealing rings.
    This article introduces the method of measuring the hardness of rubber sealing rings using a Shore durometer. The Shore durometer presses a needle into the rubber surface under spring force and converts the indentation depth into a hardness value, commonly using the A scale.
    Shore durometer measures the hardness of cured cast resin.
    The Shore durometer measures hardness by pressing an indenter into the material surface, making it suitable for evaluating the properties of cast resin after curing.
    Shore durometer measures the elastic modulus of flexible resin.
    This article explores how to use a Shore rubber hardness tester to measure the hardness of flexible resins and estimate their elastic modulus through theoretical models and empirical formulas.
    Pencil Hardness Tester for Rapid Evaluation of Coating Surface Hardness
    The pencil hardness tester is a tool used for rapidly assessing the relative hardness of coating surfaces through standardized scratch tests. It employs a series of pencil leads with known hardness levels, which are drawn across the coating under a fixed load and angle. The hardness grade, ranging from 6B to 9H, is determined based on whether a permanent scratch is produced.
    Buchholz indentation tester measures the indentation hardness of varnish.
    The Buchholz indentation test is a method for measuring the indentation hardness of coatings such as varnishes. It involves applying a specific indenter to the coating surface under a standard load, and after unloading, the length of the residual indentation is measured. A longer length indicates lower hardness.
    Pencil Hardness Plan Outstanding Paint Film Pencil Hardness Grade
    The pencil hardness test is a method for evaluating the scratch resistance of paint films. It involves using a series of pencils with known hardness levels to scratch the coated surface under fixed conditions. The hardness grade of the coating is determined by observing whether permanent scratches are produced.
    The pendulum hardness tester tests the scratch resistance limit of varnish.
    The pendulum hardness tester measures the hardness of varnish by observing the attenuation of the pendulum's swing on the coating surface, with faster attenuation indicating a softer coating. The scratch resistance of varnish depends not only on hardness but also on elasticity and toughness. Hardness testing sets the basic threshold for scratch resistance.
    Application of Film Pencil Hardness Tester in Coating Scratch Resistance Testing
    The paint film pencil hardness tester is an instrument used to evaluate the scratch resistance of coatings. It works by scratching the surface of the coating with a pencil of known hardness under a fixed load, and then assessing the hardness grade based on whether scratches are produced.
    Use of pendulum hardness tester for paint film curing degree assessment in the laboratory.
    The pendulum hardness tester evaluates the hardness of a paint film by measuring the decay time of a pendulum swinging on the surface of the film, where a longer time indicates a harder film and a higher degree of curing.
    Pendulum hardness tester measures the damping hardness of powder coatings.
    This article introduces the method of testing the damping hardness of powder coatings using a pendulum hardness tester. The test is based on the principle of energy attenuation, where the hardness is reflected by the time it takes for the amplitude of the pendulum to decay as it swings on the coating surface, with a longer time indicating a harder coating.
    Pendulum hardness tester measures coating damping hardness.
    This article explains how a pendulum hardness tester measures the damping hardness of coatings. The principle involves evaluating the hardness and elasticity of the coating based on the time it takes for the amplitude of a pendulum's swing to decay on the coating surface. A longer decay time indicates a harder coating.
    Classification standards for determining the hardness of coatings using a pencil hardness tester.
    This article introduces the method of measuring the hardness of coatings using a pencil hardness tester. It involves using pencils of varying hardness to scratch the coating and observing whether scratches are produced to determine the hardness grade, ranging from 6B to 9H.