CSIRO embarks on titanium powder rolled strip initiative

November 19, 2010

November 19, 2010

The Process and Engineering Division of CSIRO in Melbourne, Australia, has been actively involved for a number of years in the development of innovative processes for the production of ‘low-cost’ CP-grade titanium powders, including the CSIRO TiRO™ process and the ITP-Armstrong process. The success of these processes has encouraged CSIRO’s Light Metal Flagship to further develop downstream technologies to use the CP-titanium powders for the manufacture of semi-finished flat/strip products by a powder metallurgy process.

In this process, which was outlined in a presentation by G.M.D. Cantin, et al., at PM2010 in Florence, Ti powders are compacted by direct cold rolling to form a green strip. The green strip is then fed to a preheating station where it is rapidly heated in an argon atmosphere for a period of up to a few minutes before being transferred to a hot rolling station. The strip exits from the rolls directly into a cooling chamber which is also purged with argon to minimise the pick-up of atmospheric gases. The authors report that this technique is capable not only of producing strip from pure CP titanium powders, but also from Ti pre-alloyed powders, and blended Ti and elemental alloying powders.

The authors state that a significant advantage of this direct powder rolling, combined with the hot roll densification technique, is the short preheating time prior to hot rolling. This factor directly impacts on productivity. Another important advantage is that strip can be manufactured to thin gauges (<1 mm) in one or two hot rolling passes, which significantly reduces material waste, especially the yield losses resulting from surface removal treatments.

It was reported that strips with a density greater than 99.5% were fabricated from powders with different morphologies and properties, such as angular hydride-dehydride and sponge-like titanium powders. The pick-up of oxygen during the powder rolling process was measured to be low (<200 ppm). The mechanical properties of the consolidated and annealed strips were found to be dependent on the oxygen content of the strips, which was in turn influenced by the oxygen content of the powder feedstock. The tensile properties of strips made from powders with an oxygen content of approx. 0.35% and rolled to a percentage reduction of the thickness greater than 40%, approach those of the ASTM B265 Grade 3 material.


The direct powder rolling process was also used to produce a homogeneous Ti-6Al-4V strip with a density of 99.6% using hydride-dehydride titanium powder blended with the Al-V master alloy powder and Al powder. This strip had the tensile properties required for the ASTM Grade 5 material. The intensification of effort in this powder rolled Ti strip project has resulted in a recent up-scaling of the facilities at CSIRO including the installation of a new pilot scale hot roll mill scheduled for commissioning before the end of 2010. This facility will have a four-high roll system, which will significantly increase the capacity of the process, and is designed for the production of 400 mm wide and nominally 0.5-3.0 mm thick Ti and Ti alloy strip. CSIRO is currently actively seeking industry engagement to expand the process from its current pilot plant status to a production operation.

The authors stated that a major factor in the production of powder rolled Ti strip at reduced cost is the cost of the powder feedstock. Whilst the economies of scale are yet to be fully demonstrated for these “lower cost” powders, they say it is worth noting that powder rolling of Ti strip could also play a complementary role to conventional production technologies and would, therefore, be capable of adding to the overall growth of the titanium industry.


News | Articles | Market reviews | Search directory | Subscribe to e-newsletter

November 19, 2010

In the latest issue of PM Review…

Download PDF

Extensive Powder Metallurgy industry news coverage, and the following exclusive deep-dive articles and reports:

  • From powder modification to rejuvenation: Fluidised Bed Reactors in metal powder production and Additive Manufacturing
  • Retech: Enabling the atomisation of reactive and refractory alloys at substantially higher levels of productivity and lower cost
  • Sustainability in Powder Metallurgy: Highlights from the 41st Hagen Symposium
  • Innovations from Japan’s Powder Metallurgy industry: award winners highlight novel automotive and healthcare applications

The latest news from the world of metal powders, delivered to your inbox

Don't miss any new issue of PM Review, and get the latest industry news. Sign up to our weekly newsletter.

Sign up

Join our community

Discover our magazine archive…

The free-to-access PM Review magazine archive offers unparalleled insight into the world of Powder Metallurgy from a commercial and technological perspective through:

  • Reports on visits to leading PM part manufacturers, metal powder manufacturers and industry suppliers
  • Articles on technology and application trends
  • Information on materials developments
  • Reviews of key technical presentations from the international conference circuit
  • International industry news

All past issues are available to download as free PDFs or view in your browser.


Browse the archive


Looking for PM production equipment, metal powders, R&D support and more?

Discover suppliers of these and more in our
advertisers’ index and buyer’s guide, available in the back of PM Review magazine.

  • Powders & materials
  • Powder process, classification & analysis
  • PM products
  • Atomisers & powder production technology
  • Compaction presses, tooling & ancillaries
  • Sintering equipment & ancillaries
  • Post-processing
  • Consulting & toll sintering
View online
Share via
Copy link