Aluminium alloy surface hard anodized layer hardness instrument detection - Database & Sql Blog Articles

Hardness test and method study of oxide film

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In order to improve the wear resistance of aluminum alloy parts and extend their service life, the hard anodizing treatment of aluminum alloys shows that accurate measurement of oxide film thickness and hardness is crucial for ensuring the smooth progress of the hard oxidation process.

1. Factors Affecting the Performance of Road Alloy Hard Anodized Film

Under low temperature conditions, the electrolyte is mainly divided into sulfuric acid medium through finely tunable micro-pulsed direct current, and the aluminum alloy piston is hard anodized to obtain a surface oxide film with thickness ≥0.04mm and hardness ≥350HV, providing a wear-resistant and corrosion-resistant layer.

Oxide film hardness is the key factor influencing wear resistance, followed by oxide film thickness. The hardness is not only related to the aluminum alloy material and oxidation process but also directly affected by the oxide film thickness. However, research has shown that thicker oxide films do not always mean better performance. As the oxide film becomes thicker, its hardness tends to decrease. In production, excessively thick oxide films can lead to cracks, reducing adhesion to the base metal and affecting mechanical properties. Therefore, accurately measuring oxide film thickness is essential for improving film performance.

2. Design and Testing of Oxide Film Thickness and Hardness Test System

As a destructive testing method, data obtained from oxide film hardness tests must be reproducible and accurate. Many factors can influence the results. If the measured microhardness values fluctuate significantly or differ greatly from expected process values, the test loses its purpose in production. Therefore, designing a reliable and accurate test system is critical for oxide film evaluation.

Test results of oxide film thickness and hardness for different materials (see table) show that the design of a thickness and hardness testing system is vital for successful aluminum oxide treatment. For this purpose, the HV-1000Z Automatic Turret Micro Vickers Hardness Tester and the HVS-1000Z Digital Automatic Turret Micro Vickers Hardness Tester are recommended as primary equipment for testing oxide film hardness and thickness. Key requirements in system design include: (Consult Shanghai Junzhun Instrument Equipment Co., Ltd.)

(1) Prepare samples meeting technical specifications, ensure operators are familiar with the instrument's performance, follow operational standards, determine test points reasonably, and plan test data.

(2) Make special sample fixtures to ensure perpendicularity between the oxide film sample section and the testing instrument, enhancing test accuracy.

Table 1: Test and Data of Oxide Film Thickness and Hardness of Different Materials

Material grade	Oxide film thickness /mm	Microhardness /HV
Industrial pure aluminum	0.03~0.07	≥800
LF21	0.07~0.12	≥600
ZL401	0.03~0.07	≥350
ZL402	0.07~0.12	≥300
LD2	0.03~0.07	≥350
LD5	0.07~0.12	≥300

HV-1000Z Automatic Turret Micro Vickers Hardness Tester

Product Description:

HV-1000Z Automatic Turret Micro Hardness Tester

The housing is integrally cast and processed, and the hole-punching alignment uses a knife-type straight-through design to ensure the concentricity and coaxiality of each hole position, laying a solid foundation for high precision and stability. The hardness meter uses Nanguangjin, a special high-definition imaging light source system on the phase microscope, providing uniform and clear lighting, which reduces indentation measurement errors. The operation interface adopts a menu structure, allowing selection of hardness scales such as HV or HK on the panel. Users can manually enter and display hardness values, with various hardness values convertible to one another.

HV or HK, test the hardness value, manually enter the display. Various hardness values can be converted to each other.

HV-1000Z Automatic Turret Micro Hardness Tester

The test head and objective lens are automatically switched during testing, and test points are accurately positioned.

Hardness scale	Vickers, Knoop
Test force	10-25-50-100-200-300-500-1000gf
Test force selection	Manual
Executive standard	Meets EN-ISO6507, ASTM E384&E92, JIS standards
Loading and unloading method	Automatic
Burden time	0-60 seconds adjustable
Turret	Automatic
Micrometer eyepiece multiple	10X
Measurement resolution	0.5 μm (Drum reading)
Objective magnification	10X 40X
Total magnification	100X (Observed), 400X (measuring)
Measuring range	150 μm
Optical channel	Dual channel /CCD
Filter	Green light source
Halogen lamp (brightness adjustable)
Hardness value resolution	0.1 Vickers unit
Hardness conversion	Brinell, Rockwell, surface Rockwell
Maximum height of the test piece	90mm
Depth at the centerline	120mm
XY test bench size	100X100mm
XY test bench moving distance	25X25mm
XY test bench minimum displacement	0.01mm
Operating temperature	23 ± 5°C
Working humidity	<65%
Host size	530mmX290mmX490mm
Hardness tester	40Kg
Power supply	220V 2A 50-60HZ

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Software is optional:

Introduction to Automatic Hardness Tester Software

One,

Use

Applicable to steel production, shipbuilding, automobile manufacturing, aircraft manufacturing, high-pressure vessels, electrical equipment, bearings, standard parts, hardware textile accessories, and instrumentation accessories, and other related to metal materials products.

Use

The software

The analysis results provided can make the enterprise quality control have more scientific basis, improve the management level of the enterprise and the appearance of the image. It is an effective tool for the enterprise to engage in the development of new technology products and product quality monitoring.

The software can also be used as an effective tool for theoretical teaching, experimental analysis and basic scientific research in scientific research units, manufacturing plants, universities and other departments related to metal materials.

Second, the function:

Computerized image analysis system for precise correction and gradient plotting. It can also be measured by eyepieces. Output measurement data, Image, Metallographic graphics, and hardness gradient map, Printable or saveable. The machine is a measurement image analysis system combining computer measurement system and hardness tester.

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The hardness of the test indentation is measured by software conversion of the signal.

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It is possible to test Vickers, Brinell, Knoop, carburized layer, nitrided layer, etc.

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The indentation image can be adjusted for contrast, brightness, etc.

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For the indentation obtained from a sample with a poor finish, an edge detection operation can be performed.

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Indentation can 2 Magnification of × to better measure the test value.

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The image file and the data file can be opened, stored, and printed separately in Chinese and English, and the data can be transferred. Excel Document processing and other processing.

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Data files and image files can be viewed at any time, and data files are printed in the form of tables and curves.

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High or low magnification objectives can be selected as needed.

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Stand by WIN9X, WIN2000, WINXP and other operating systems. Can be configured in a variety of micro hardness testers, Various Vickers/Knoop hardness tester. With measurement length, angle attack energy, can be simple Use with the projector.

Third, the complete set:

1 Image sensor camera (Japan Sony chip color 1/3 HD CCD700 Line) (standard) Japan HD JVC camera (high match) matching

2 Image capture card High resolution image real-time capture card SDK2000 Type secondary development software package (standard) High resolution image real-time capture card SDK3000 Type secondary development software package (high with)

3. Adapter and interface

4, automatic hardness measurement software (2012 Edition) (standard) Multiple control measurement software (multi-function version) (high with)

5. Microcomputer and printer: current mainstream configuration warranty brand machine (optional)

Please consult for details: Shanghai Junzhun Instrument Equipment Co., Ltd.