Overview
SMTMF HRM-45A Surface Rockwell Hardness Tester is a test instrument used to determine the hardness of materials. Hardness is evaluated by measuring the ability of materials to resist pressing. Hardness testing is an economical, rapid and effective means of judging the mass of metal materials or parts, and can approximate Miscellaneous Mechanical Properties.
Features
1. Sturdy construction with good rigidity.
2. Hardness resolution 0.5 Rockwell units.
3. Direct dial reading: HR15N, HR30N, HR45N, HR15T, HR30T, HR45T.
4. External test force selection knob, easy to operate.
5. Mechanical manual testing process, no electrical devices required.
6. Precision hydraulic buffer, adjustable loading speed.
7. The test space is large, allowing for the placement of larger samples.
8. It has a wide range of applications, easy operation, and good economy and practicality.
9. The accuracy conforms to GB/T 230.2, ISO 6508 and American ASTM E18 standards.
10. The standard configuration is complete, meeting the testing requirements of all rulers.
Principle
The hardness gauge works based on the principle of rockwell hardness testing. By applying the specified initial test force and total test force, the diamond indenter or cemented carbide ball indenter is pressed into the surface of the sample, and the depth difference of the Cedge is measured, so that the corresponding rockwell hardness value is read directly on the dial.
Applications
Surface hardened steel, material surface heat treatment and chemical treatment layer, copper, aluminum alloy, sheet, galvanized, chrome, tin plating materials, bearing steel, cold hard castings
Standards
ISO 6508、ASTM E18、GB/T230.2
Steps
Select the appropriate test force scale (e.g. HR15N, HR30T, etc.) according to the sample.
2. Select the corresponding total test force (15kgf, 30kgf or 45kgf) through the external knob.
3. Place the sample on the workbench to ensure that the test surface is flat.
4. Turn the handwheel so that the indenter slowly touches the sample and applies the initial test force.
5. Continue to load to the total test force, and control the loading speed through the oil pressure buffer.
6. Remove the main test force and retain the initial test force.
7. Read the Hardness value directly from the dial.
Notice
● Ensure that the hardness gauge is placed horizontally and firmly before use.
Select the indenter (diamond or carbide ball) and test force scale correctly according to the material to be tested.
The surface of the sample should be clean and flat, and the thickness should meet the test requirements.
● The handwheel should be rotated smoothly during operation to avoid Impact.
● Regularly clean the indenter and table to maintain instrument accuracy.
Be careful when handling or moving to avoid collisions.
Non-professionals should not disassemble or adjust the internal structure.
