New Vickers hardness tester

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The new Vickers hardness tester is suitable for testing metal structures, metallurgy and metallography research, including small parts, thin plates, metal foils, wires, thin hardening layers and electroplated surface coatings, quenching hardening layers, nitride layers, steel, non-ferrous metals, ceramics, alloys, heat treatment, carbonization, ultra small and very thin parts with a thickness of up to 3 μ m, and measuring the depth of hardening layers.

Product Details

New Vickers hardness testerAdopting an LCD display screen, the hardness scale can switch between Vickers (HV) and Knoop (HK), the testing process is automated, the operation is simple, the high-definition optical system, the light source brightness can be adjusted by 20 levels, and there are multiple hardness standard conversion functions. The diagonal length D1 and D2 values can be measured with a micrometer eyepiece, and the hardness value can be displayed on the LCD after key input; The objective lens and pressure head of the automatic turret can automatically switch and position accurately. Integrated cast aluminum body, no deformation or displacement, weight loading structure, stable performance, high measurement accuracy, and good repeatability.

Equipped with an LCD display screen, it can switch between Vickers (HV) and Knoop (HK) hardness scales;

The experimental process is automated and easy to operate;

High definition optical system, light source brightness can be adjusted up to 20 levels;

● Multiple hardness conversion functions;

Diagonal length D1 and D2 are encoder inputs to reduce human reading errors;

The objective lens and indenter can be automatically switched for accurate positioning.

New Vickers hardness testerSuitable for testing metal structures, metallurgy and metallography research, including small parts, thin plates, metal foils, wires, thin hardening layers and electroplated surface coatings, quenched hardening layers, nitride layers, steel, non-ferrous metals, ceramics, alloys, heat treatment, carbonization, ultra small and very thin parts with a thickness of up to 3 μ m, and measuring the depth of hardening layers.

The Vickers hardness test uses a 136 ° diamond indenter to press the surface of the tested object with a specified test force (F). After holding the test force for a specified time, the test force is removed, and the diagonal (d) of the indentation on the surface of the specimen is measured using a micrometer eyepiece. The average pressure (N/mm2) borne by the conical surface area of the indentation is calculated, which is the Vickers hardness value.

Technical parameters:

model	GHV-1000Z
Test force gf	10gf (0.098N)、25gf (0.245N)、50gf (0.49N)、100gf (0.98N )、200gf (1.96N)、300gf (2.94N)、500gf (4.9N)、1000gf (9.8N)
Minimum measurement unit	0.25μm
measurement range	0-3000HV
measurement accuracy	Suitable for or higher than GB/T4340.2 (see Appendix 1)
Total magnification factor	100X (observation) 400X (measurement)
加荷方式	Automatic (loading, holding, unloading)
data output	LCD display readout
Duration Time	Adjustable from 5-60 seconds
Instrument dimensions (length x width x height)	405×290×480mm
Instrument weight	About 35Kg
Maximum height of test piece	90mm
Distance from the center of the pressure head to the inner wall	120mm
Exchange Scales	HRA、HRB、HRC、HRD、HRE、HRG、HRF、HRK、HV、HK、HBS、HR15N、HR30N、HR45N、HR15T、HR30T、HR45T
power supply	AC220V±5%，50~60Hz
execution standard	GB/T4340.1 GB/T4340.2 IS06507-2 ASTM_E384
execution standard	JJG151 Verification Regulations
X-Y test bench	Size: 100 × 100mm; Maximum movement: 25 × 25mm; Minimum displacement: 0.01mm
Optional accessories	CCD camera measurement system, Nusselt indenter, fine wire clamping table

Appendix 1:

Hardness symbol	Maximum error, expressed as a percentage of the specified hardness value of the standard block
	Hardness, HV
	50	100	150	200	250	300	350	400	450	500	600	700	800
HV0.01
HV0.025	8	10
HV0.05	6	8	9	10
HV0.1	5	6	7	8	8	9	10	10	11
HV0.2		4		6		8		9		10	11	11	12
HV0.3		4		5		6		7		8	9	10	10
HV0.5		3		5		5		6		6	7	7	8
HV1		3		4		4		4		5	5	5	6
Note: When the diagonal of the indentation is less than 0.020mm, the error value is not given in the table. For the median value, its maximum allowable error can be obtained by interpolation. 3. The values in the table are given with a maximum error of 0.001mm or 2% of the average diagonal of the indentation, whichever is greater.
The content in the table is excerpted from GB/T4340.2.

name	quantity	name	quantity
Instrument host	1 unit	Objective lenses 40x, 10x,	1 each
Vickers indenter	1 piece	weight	6 pieces
Cross workbench	1 piece	Weight rod	1 piece
Thin film clamping table	1 piece	External power cord	1 piece
Flat mouth clamping table	1 piece	10x digital micrometer eyepiece	1 piece
level gauge	1 piece	Micro Vickers hardness block (HV1, HV0.2)	One piece each

Operation of ruler automatic turret model:

1. Observe the two lines within the field of view through the eyepiece and rotate the eye mask to make the lines clearNote: Rotating the eye mask may cause blurry imaging of the indentation. After the two engraved lines are clear, rotate the lifting wheel to make the indentation image clear.

2. Rotate the drums on both sides of the micrometer eyepiece so that the inner sides of the two lines are infinitely close, that is, when the light transmission between the inner sides of the two lines gradually reaches a critical state of light and no light, observe whether the zero position line on the measuring drum is aligned. (This has been corrected before leaving the factory, please do not adjust it arbitrarily, as everyone's vision condition is different).

3. Rotate the two drums of the micrometer eyepiece in reverse, gradually separating the two engraved lines. Rotate the left drum of the eyepiece to make the inner side of the left engraved line tangent to the left edge of the indentation.

4. Rotate the right measuring drum to make the inner side of the right engraved line tangent to the edge on the right side of the indentation. Record the data and enter the value of the indentation length. Press OK and complete the measurement on D1.

5. Rotate the micrometer eyepiece by 90 ° (note that it should be tightly attached to the eyepiece tube when rotating), rotate the drum to make the inner side of the lower engraved line tangent to the edge below the indentation.

6. Rotate the measuring drum to make the inner side of the upper engraved line tangent to the edge of the indentation. Record the data and enter the value of the indentation length. Press OK and D2 to complete the measurement. The instrument automatically calculates the hardness value and displays it, and the number of tests automatically increases by one, completing one measurement.

7. Calculation of indentation length: The eyepiece measures the number of rotations (on the drum shaft) and the number of grids on the outer circumference of the drum when the inner side of the moving engraved line is tangent to the indentation diagonal after one rotation of the drum by 50 grids. For example, if the drum rotates twice and there are 12 small grids on the outer circumference, then the total is 112 grids. When entering the machine, simply enter 112 grids. (Actual length of indentation diagonal: 0.25 × 112=56 μ m)

standard

GB/T 4340.1-1999 Metallic Vickers Hardness Test Part 1: Test Method

GB/T 4340.2-1999 Metallic Vickers Hardness Test Part 2: Verification of Hardness Testers

ISO 6507-2:2018 "Vickers hardness test for metallic materials - Part 2: Verification and calibration of hardness testers" international standard

ASTM E384-17 Standard Test Method for Knoop and Vickers Hardness of Materials

JJG151- Verification Regulations for Metallic Vickers Hardness Testers