Durómetro Vickers

La serie de durómetros Vickers "Qness;" lleva los ensayos de dureza Vickers a un nivel completamente nuevo. Nuestros modelos de gama alta de última generación combinan los ciclos de corta duración con la máxima precisión. Las características como el cambiador de herramientas de 8 posiciones, un amplio software y la conectividad mediante Qconnect hacen de esta serie de durómetros Vickers la opción óptima para los clientes que busquen los productos más innovadores del mercado.

Microdurómetro Vickers Rango de fuerzas de ensayo: 0.25 g – 62.5 kg

NUEVO

Durómetro Vickers QNESS 10/60 M

Semiautomático
Rango de fuerzas de ensayo 20 gf – 10 kgf
Opción: 0.25 gf – 62.5 kgf
Vickers, Knoop, Brinell, Opción: Rockwell
Mesa transversal móvil XY manual
información del producto

NUEVO

Durómetro Vickers QNESS 10/60 A+

Totalmente automatizado
Rango de fuerzas de ensayo 20 gf – 10 kgf
Opción: 0.25 gf – 62.5 kgf
Vickers, Knoop, Brinell, Opción: Rockwell
Corredera XY muy precisa ± 2µm
cámara de imagen de la muestra:
información del producto

NUEVO

Durómetro Vickers Qness 60 A+ EVO

Alta gama totalmente automatizada
Rango de fuerzas de ensayo 0.25 gf – 62.5 kgf
Vickers, Knoop, Brinell, Rockwell
Corredera XY de alta precisión ± 0,2µm
Cámara de imagen de la muestra
información del producto

Macrodurómetro Vickers Rango de fuerzas de ensayo: 0.3 kg – 3000 kg

Durómetro Vickers Versión CS/C EVO

Concepto probado – redefinido
Ideal para muestras pequeñas
información del producto

Durómetro Vickers Versión M EVO

Cabezal de ensayo de altura regulable manualmente
Ideal para muestras de gran tamaño
información del producto

Durómetro Vickers Versión E EVO

Ajuste cómodo de la altura del cabezal de ensayo mediante motor
Todos los tamaños de piezas de trabajo y fuerzas de sujeción elevadas
información del producto

Durómetro Vickers totalmente automático Rango de fuerzas de ensayo: 0.3 kg – 3000 kg

Durómetro Vickers Versión CA/CA+ EVO

Métodos de ensayo: Brinell, Knoop, Rockwell, Vickers
Rango de fuerzas de ensayo: 0.5 kg – 750 kg
Concepto probado – Automatización completa con platina XY de alta precisión
Para aplicaciones con altura uniforme de la muestra
información del producto

Durómetro Vickers Versión A/A+ EVO

Métodos de ensayo: Brinell, Knoop, Rockwell, Vickers
Rango de fuerzas de ensayo: 0.3 kg – 3000 kg
Control de alta precisión del cabezal de ensayo mediante un motor asíncrono
Progresión automática de ensayo XYZ para distintas alturas de muestra
Armario bajo y carcasa de seguridad plenamente integrados en el diseño de la máquina
información del producto

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Información de trasfondo Ensayo de dureza Vickers (DIN EN ISO 6507)

Based on the ideas of Smith and Sandland, a hardness testing method was developed in 1925 in the English Vickers works, using a diamond pyramid as the indenter. A regular four-sided diamond pyramid with a surface angle of 136° is pressed vertically into the preferably polished surface of the test specimen with a certain test load. After a certain exposure time, the test specimen is removed again and the two diagonals (d1 and d2) of the indentation are measured with a measuring microscope. The average length d is then calculated. The Vickers hardness is then determined according to the given formula.

1. Indentation of the diamond pyramid with test force F into the test specimen

2. Measurement of the indentation with diameter d

Calculation of the Vickers hardness

Vickers calculation formula:

Prerequisites for standard-compliant testing

Various prerequisites need to be fulfilled for standard-compliant testing:

Test temperature

normal requirements: 10°C bis 35°C
high requirements: 23°C ± 5°C

Workpiece thickness

t ≥ 1.5 * d with t = sample or layer thickness d = average length of the indentation diagonals

Distances between the indentations and from the edge

For steels, Cu and Cu alloys
- a ≥ 2.5 * d
- b ≥ 3 * d
For light metals, Pb, Zn as well as their alloys
- a ≥ 3 * d
- b ≥ 6 * d

It is distinguished between the macro, small force and micro hardness range.

Macro Hardness Range

General tests on relatively thick components

Recommended test forces	Name of value
980.70	HV 100
490.30	HV 50
294.20	HV 30
196.10	HV 20
98.67	HV 10
49.03	HV 5

Small Force Range

Tests on thin workpieces, thin surface layers and foils

Recommended test forces	Name of value
29.42	HV 3
19.6	HV 2
9.807	HV 1
4.903	HV 0.5
2.942	HV 0.3
1.961	HV 0.2

Micro Hardness Range

Measurements at individual structure components

Recommended test forces	Name of value
0.981	HV 0.1
0.490	HV 0.05
0.245	HV 0.025
0.196	HV 0.02
0.098	HV 0.01

Vickers hardness test results

According to DIN EN ISO 6507-1, the result of a Vickers test is given as follows:

700 HV 10 / 20 ⇒ Hardness value as per Vickers

700 HV 10 / 20 ⇒ Abbreviation for Vickers hardness

700 HV 10 / 20 ⇒ Test force specification: Test force [N] = 9.807 * test force specification

700 HV 10 / 20 ⇒ Application time of the test force (omitted if it is between 1-15 s)

measuring hardness depths

The Vickers test is also the preferred method for measuring hardness depths. A distinction is primarily made between the depth of hardening after case hardening (CHD), after nitriding (NHD) and after induction hardening (SHD).

Depth of hardening after case hardening (CHD)

When testing the case hardening depth (CHD), the hardness in HV1 is measured on the cross-section at regular distances from the surface. In order to comply with the above-mentioned rules of distance between the individual indentations, this is usually done as a 'zig-zag line'. The values are plotted graphically. The CHD is the distance at which the hardness falls below a certain limit. Usually, the limit is GH = 550 HV1 but a deviating value can be determined.

An example of this method is shown in the following image. The case hardening depth (CHD) can also be calculated from the pairs of values.

Distance from the surface [mm] ⇒ Hardness [HV1]

0.1 ⇒ 717
0.2 ⇒ 718
0.3 ⇒ 705
0.4 ⇒ 675
0.5 ⇒ 645
0.6 ⇒ 610
0.7 ⇒ 580
0.8 ⇒ 550
0.9 ⇒ 520
1.0 ⇒ 490
1.1 ⇒ 465
1.2 ⇒ 450
1.3 ⇒ 440
1.4 ⇒ 430
1.5 ⇒ 425

CHD = Case Hardening Depth

Depth of hardening after nitriding

When testing the nitriding hardening depth (NHD), the hardness in HV0.5 is measured on the cross-section at regular distances from the surface. In order to comply with the above-mentioned rules of distance between the individual indentations, this is usually done as a 'zig-zag line'. The values are plotted graphically. The NHD is the distance at which the hardness falls below a certain limit. Usually, the limit is defined as GH = core hardness + 50 HV, but a deviating value can be determined.

An example of this method is shown in the following image. The nitriding hardening depth (NHD) can also be calculated from the pairs of values.

Distance from the surface [mm] ⇒ Hardness [HV1]

0.05 ⇒ 1080
0.1 ⇒ 1050
0.2 ⇒ 350
0.3 ⇒ 257
0.4 ⇒ 250
0.5 ⇒ 250
0.6 ⇒ 250
0.7 ⇒ 250
0.8 ⇒ 250
0.9 ⇒ 250
1.0 ⇒ 250

NHD = Nitriding Hardening Depth

limit hardness GH = core hardness KH + 50 HV

Depth of hardening after induction hardening

When testing the induction hardening depth (SHD), the hardness in HV15 is measured on the cross-section at regular distances from the surface. In order to comply with the above-mentioned rules of distance between the individual indentations, this is usually done as a 'zig-zag line'. The values are plotted graphically. The SHD is the distance at which the hardness falls below a certain limit. Usually, the limit is defined as GH = 85% of the minimum surface hardness, but a deviating value can be determined.

An example of this method is shown in the following image. The induction hardening depth (SHD) can also be calculated from the pairs of values.

Distance from the surface [mm] ⇒ Hardness [HV1]

0.1 ⇒ 698
0.2 ⇒ 700
0.3 ⇒ 703
0.4 ⇒ 705
0.5 ⇒ 705
0.6 ⇒ 705
0.7 ⇒ 703
0.8 ⇒ 701
0.9 ⇒ 698
1.0 ⇒ 700
1.1 ⇒ 701
1.2 ⇒ 660
1.3 ⇒ 500
1.4 ⇒ 300
1.5 ⇒ 285
1.6 ⇒ 284
1.7 ⇒ 283
1.8 ⇒ 285
1.9 ⇒ 282
2.0 ⇒ 281

SHD = Surface Hardening Depth

Target	58+4 HRC
≈	650+100 HV10
⇒ GH	85%(650HV)
⇒ GH =	553 HV