HARDNESS TESTERS NEWS

Innovations to Test the Limits of Hard Metals

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Patrik Olund
Head of Group R&D
Ovako

An international technology service provider and materials science startup located in Cambridge, UK has formed a new technical collaboration with Ovako, a manufacturer of engineering steel with locations in North America. The collaboration is focused on extending the startup's new metal testing technology to be able to test very hard metals, including novel grades.

Testing the steel manufacturer's Hybrid Steel® is a particular focus of the collaborative efforts with Plastometrex. The novel grade results from the first successful combination of two well-established precipitation strengthening mechanisms – i.e. simultaneous hardening by both carbides and intermetallic precipitations. It is designed to meet the demands of high-stress, elevated-temperature applications where mechanical strength is critical.

Bill Clyne
Chief Scientific Officer
Plastometrex

Patrik Olund, vice president and Head of Group R&D of Ovako, comments on the technology, "Their platform methodology and innovative product provide a much-needed tool for both metallurgy R&D and production activities. By extending the capability of the technology to test the hardest metals, we will be able to use the technology to rapidly characterize and optimize our products as well as the novel Hybrid Steels."

From the Ovako collaboration, Plastometrex will release a product update that will enable the device to test the vast majority of very hard engineering metals. Professor Bill Clyne, Chief Scientific Officer and leader of Plastometrex's research and development activities, commented, "[OVAKO] are a company with excellent scientific capabilities and a forward-thinking approach. Our collaborative work has been highly fruitful and directly resulted in capability improvements to our flagship product, which will soon be able to test very hard metals."

To learn more about this technology, listen or read the transcript to this Heat Treat Radio episode.

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Global Materials Engineering Group Tests Hardfacing Alloy Applications

A global materials engineering group explored alternative methods of applying a hard surfacing alloy at the ITSC conference in Japan.

Engineers from Wall Colmonoy Corp. discussed in a conference presentation how the properties of a hard surfacing alloy change when applied by different methods. Alloy Ni-15Cr-15W-3B-4Si-3.5Fe-0.6C is a hard surfacing alloy designed to extend the life of OEM parts that are subjected to various wear mechanisms in service. The alloy can also be used to repair/rebuild those worn parts and extend service life.

This hard-surfacing alloy can be applied by various methods, including thermal spray processes, laser cladding, PTA welding, GTAW, OFW, and GMAW. This study compared the properties of the alloy applied by different methods using various test procedures, and also included the cost/benefit ratio of each.

Test procedures included abrasion testing by ASTM G-65; erosion testing by ASTM G-76; Vickers hardness by ASTM E-92; and Rockwell hardness by ASTM E18. In addition, metallographic examples of the test specimens were prepared.

Photo Credit: ASM International

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Heat Treating Group Launches Mechanical Testing Facility

A U.K. heat treatment specialist recently went operational with a new in-house mechanical testing facility, certified by UKAS, at its Cambridge plant.

Andy Fox, operations director at Wallwork Cambridge.

With the new testing equipment, Wallwork, based in Bury, England, has the capability to run tensile, compression, and hardness tests on materials and components prior to and post heat treatment, boosting customer order turn-around times.

“Destructive testing is mainly specified by customers in aerospace, however, it is becoming increasingly common in motorsport, medical devices, and other industries where there can be no compromise in product integrity. The new facility gives us much quicker results than going out to an external testing lab,” said Andy Fox, operations director at Cambridge.

In addition to Rockwell hardness and shadowgraph is the new Z100 testing rig from ZwickRoell, which allows Wallwork to quickly identify any material or processing issues that could impact quality as well as data to refine existing metal heat treatment processes, component design and more. Wallwork operates vacuum brazing units at Manchester and Cambridge where the new Z100 has the potential to confirm joint strength between vacuum brazed materials.

“Faster turnaround of testing results is necessary for us to meet customer manufacturing targets and it also makes much easier the internal management of important accreditations,” said Fox.

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Scientific Equipment Supplier Launches Quick Ship Program

An industrial provider of scientific equipment, supplies, consumables, and analysis techniques for use in materials preparation, image analyses, and hardness testing, recently announced a Quick Ship program for the company’s Rockwell hardness test blocks.

Buehler, an ITW company based in Lake Bluff, Illinois, services a cross-section of industries, including primary metals, automotive, aerospace and defense, electronics, medical, and energy. The company launched the program for a selection of the most commonly used Rockwell test blocks in North America, which includes:

HRB Scale: 40HRBW, 50HRBW, 60HRBW, 70HRBW, 80HRBW, 95HRBW
HRC Scale: 25HRC, 30HRC, 35HRC, 40HRC, 45HRC, 50HRC, 55HRC, 60HRC, 63HRC
HR15N Scale: 72HR15N, 83HR15N, 91HR15N
HR15T Scale: 74HR15T, 87HR15T

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