How Ultrasonic Hardness Tester Is Better Than a Bench Top ...

Hardness is the material’s ability to withstand permanent indentation. This empirical test defines the hardness value of materials depending on their type. Therefore, the results must be labeled with the specific method used.

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Testing is commonly used in inspection and process control. Outcomes help estimate mechanical properties such as tensile strength. This process is done with appropriate testing machines that match an indenter. The shape of the indentor differs according to the type of hardness test needed.

An ultrasonic hardness tester is one of the most common testing solutions available today. But another hardness tester that you can consider is the bench top hardness tester type. Knowing what makes the difference between these hardness testers can help you choose the right tool for your testing needs.

Choosing the Best Hardness Tester

Bench and portable are the two main types of hardness tester. The stationary and classical testing tools are examples of bench, while the mobile and electronic hardness testers belong to the portable type.

Here are some tips in choosing a hardness tester:

• Check if the device relies on ultrasonic vibration sensor rod. If it does, it means the tester can quickly determine the hardness value of the material including some metals without incurring damage.
• Test the speed and precision of the testing tool. An advanced sensing technology using a single chip can make more accurate and quicker measurement results unlike the typical hardness tester.
• Make sure the device supports value conversion. Before buying a hardness testing tool, check if it offers multi-point measurement. That way, precise printing and display of outcomes can be achieved.

Ultrasonic Hardness Tester vs. Bench Top Hardness Tester

Ultrasonic Hardness Tester

The ultrasonic portable hardness tester is an instrument that is lightweight and smaller in size. It’s a compact device that is designed to measure hardness using several scale violence. However, modern portable hardness testing tools are typically made to measure all types of scale violence.

One great advantage of using portable hardness tester is that it allows users to bring the device and measure samples anywhere they want. That means you can conveniently work on your projects without the hassles. Also, an electronic portable hardness tester offers useful features to make the process easier.

For instance, you can use the internal storage to save your measurement results. Then you can send the results to your computer so you can create a report through ARM control, a special feature designed for portable hardness testers. This is what makes an electronic portable hardness testing tool better than the bench top hardness tester.

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Bench Top Hardness Tester

On the other hand, a bench top hardness testing device is a classical tester that is designed to measure hardness using standard methods like Vickery, Rockwell, Brinell, and Shor.

Some of the most common examples of this device include Bench Brinell hardness tester and Rockwell Bench hard tester. These tools will allow you to measure the value of hardness by scale as well as by some large hardness scale.

For instance, you can use a bench top hardness tester to determine hardness with Vickers, Brinell, and Rockwell scale. The only challenge in using this type of hardness testing tool is that it’s big and heavy, usually weighing 50 kilograms or even more.

Also, bench top hardness testers should be placed on the floor or mounted on a table. But these devices implement classical model which means you use direct method to accurately measure the hardness of any material.

Benefits of UCI Hardness Tester

The ultrasonic contact impedance hardness tester or commonly known as UCI hardness tester is made with a hand-held probe and host connected by a cable. The probe has a vibration bar that connects the pressure head of the Vickers. After the boot, the vibration bar creates the ultrasonic vibration.

Since the device relies on ultrasonic resonance, there will be no damage on your workpiece. But this is only one of the many benefits of using an ultrasonic hardness tester. More advantages of UCI hardness tester are listed below.

• Perfect for measuring products with higher surface requirements.
• An internal protection circuit is included to protect the device against interference.
• The device can also detect different materials by simply using similar material or elastic modulus to execute test blocks while adjusting the probe without the need for replacement.
• The in-built rechargeable battery has longer life so users can measure materials even without plugging into a power supply.
• It can be used in measuring and calculating various materials despite the differences in their value of hardness.
• There’s an optional plats for minimum workpiece detection. Meaning, you can modify the speed of detection according to your requirements.

But overall, an ultrasonic hardness tester is lightweight, smaller, and portable so you can accomplish your projects anytime and anywhere. You can use it in gears, bearings, and metal coating such as chrome layer, plating layer, carburizing layer, and nitriding layer.

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Tracy,

The dial closest the handle measures the pressure. The other dial measure the depth of the dent and marks that in Rockwell numbers.

The knob under the hand applies pressure.

First, turn the knob to loosen all the pressure (the pressure guage will stop going backwards.

Now put the blade on the 'anvil' and clamp down with that big screw thingy in the middle until snug.

Now slowly turn the pressure knob until the guage is at 'Set'. Do NOT go past the 'Set' mark!

Twist the hardness guage to the 'Set' spot for the 'C' scale.

Now turn the pressure knob until the guage reaches the 'C'. Do NOT go past that.

Count to 1.5

Turn the pressure knob back so you return to 'Set'.

Read the HRC off the other guage.

There you have it.

Steve Coupons are just little uniform slices of metal used for testing....and yes, it will get coldernhell soon here but I just moved SOUTH from Fargo last year where it's veryfriggincold from August through May and then two months of tough sledding. It is like the bloody tropics where I live now. We can, however, all make fun of Kile who hangs out here and still lives in Fargo when it gets so cold all atomic motion stops. It gets so cold up there in the winter, you don't grind or forge, you chip your knife out like its made of obsidian. well, now we have (I do anyway) a problem, because mine does not work either way. Mine gets consistant 60RC with the test block by:
place the piece in the anvil and tighten it snug using the double screw knob
spin left dial to 'set', spin right dial to zero, tighten lower left knob until the scale dial reaches "C", read the hardness from the right dial.
My gauge does not 'stick' to a high point showing a reading and no math (even modern math) will give me a differential reading. I have a lead on a manual copy for $15 , guess I better get one. So long as it has not been damaged you have a fine tester. I have had three of them at one time and now still have two. When in good condition and properly calibrated you can depend on what they tell you within a half point (my opinion). Honestly I do not have time to read all you and the others said here so I do not know if you have a calibration standard. If you do not you must aquire one or more. You will need one or more that are of the hardness we knife makers wish to achieve. Search for one within a few points of 60 HRc. These testers can be calibrated and kept within calibration by you so long as you have proper standards ('test blocks') and some patience. I have noticed mine not to tend to drift once calibrated but I periodically check mine against the test blocks to verify that.

P.S., I trust you received the diamond penetrator with the portable tester(?). You'll have to have that for what your testing (R C scale). And, while at it I might as well tell you not to expect reliable readings if your test piece is not flat upon the tester anvil. Just one more thing that makes knife making unique (kinda hard to find flat spots close to the edge on the stuff we make).

RL

rlinger said: If you do not you must aquire one or more. You will need one or more that are of the hardness we knife makers wish to achieve. Search for one within a few points of 60 HRc. These testers can be calibrated and kept within calibration by you so long as you have proper standards ('test blocks') and some patience. I have noticed mine not to tend to drift once calibrated but I periodically check mine against the test blocks to verify that.
RL

Hi Roger,

Do you have any leads on calibration standards at an affordable price? I need to get one for mine!

-Darren