WeiBeam Advances TZM Alloy Electrode Trial Production, Continuing to Optimize High-Temperature Performance

In the second half of 2026, word came from the company's materials R&D center: a new-generation TZM alloy electrode has completed full-process trial production, and the first samples passed third-party testing and customer-side validation, with high-temperature performance meeting target specifications. This marks a step up in the company's refractory metal electrode material portfolio, from pure molybdenum to dispersion-strengthened alloys.

Why TZM

Pure molybdenum electrodes perform maturely in medium- and high-temperature melting conditions, but as working temperature rises further and current density and mechanical load increase together, recrystallization and slow creep of the molybdenum matrix become life-limiting factors. TZM alloy introduces titanium, zirconium and carbide dispersed phases into molybdenum, pinning grain boundaries through second phases to suppress recrystallization and raise high-temperature strength; it is a widely used high-temperature strengthening route in refractory metals.

Three challenges in trial production

• Powder mixing uniformity: trace additive elements must be distributed uniformly down to a molecular level in the molybdenum powder, and the mixing process only reached a stable standard after several rounds of iteration;
• Sintering densification: alloying elements are sensitive to the sintering window, so the company adjusted the heating schedule and atmosphere control to bring sintered density to the design value;
• Plastic working and welding: TZM has higher deformation resistance than pure molybdenum, so forging and rolling passes were reallocated, and the joining process for end assemblies was validated in parallel.

Performance and application outlook

Sample test results show that TZM electrode specimens achieve higher high-temperature creep rupture strength and recrystallization temperature than pure molybdenum, with a lower deformation rate under the same load. For high-current-density zones of glass furnaces, high-temperature heating elements in crystal growth, and continuous lines that need fewer replacements, the TZM option offers a way to extend maintenance intervals and spread outage costs. Of course, the actual benefit still needs confirming against customer operating data.

Next steps

The company plans to open TZM electrode sample testing to key customers, using real production-line data to verify service life and power consumption, while completing process documentation for volume production. With pure molybdenum, lanthanum molybdenum and TZM routes running in parallel, WeiBeam.com's selection space in molybdenum electrodes will widen further, allowing more targeted solutions matched to each customer's operating temperature and load. The R&D center will also run erosion resistance and thermal shock assessments of TZM electrodes under simulated furnace conditions, building service-life data across different media and temperature zones to support electrode selection for higher-temperature duty. Only when materials, processes and application data form a closed loop can the performance advantages of new electrodes translate into stable output in customers' furnaces, which is precisely why the company undertook TZM trial production.