TPT September 2020

T E CHNOLOG Y

New cold rolling mill commissioned by

Since 1997 , AXXAIR designs, manufactures and distributes orbital tube working machines INNOVATIVE ORBITAL SOLUTIONS

Fives at POSCO in South Korea POSCO,

Tube preparation tools

Orbital cutting

Beveling

Facing

a steel producer from South Korea, recently secured its partnership with Fives, an industrial engineering group, by entrusting the company with a breakthrough project for

The preparation of the parts that are to be welded is really important, especially when it comes to orbital welding.

its GIGA steel for the automobile industry. With challenges and advantages of GIGA steel production, POSCO contracted Fives for its reversible cold rolling mill DMS 20Hi EcoMill to processGIGAsteel – ultra advance high strength steel (U-AHSS) and TWIP – for automotive applications. For steelmakers and equipment providers, it is challenging to produce the highest tensile strength steel with 2,000MPa to behave properly in crash behaviour and have better formability. Tensile strength refers to the maximum amount of stress a material can withstand while being stretched or pulled without breaking, and is measured in MPa, as a force per unit area – the unit being a pascal (Pa)/megapascal (MPa). Since 2016, POSCO has been developing its GIGA steel for automotive applications due to its unparalleled properties. This steel is stronger than aluminium; and therefore, meets the most stringent safety standards. It has high formability to produce complex auto parts without any special processing. It leads the industry with the lightest weight available, which reduces emissions. Lighter vehicle body weight and significant reduction of CO 2 emissions have been major drivers for carmakers. The cold rolling mills are essential to reduce strip thickness while guaranteeing strip surface quality. With over 100 references worldwide over last 60 years, DMS 20Hi cold rolling mills from Fives are proven for applications in stainless and silicon steels. In view of the fact that the mechanical properties of the UHSS or GIGA steel are similar to the ones of stainless steel, DMS 20Hi EcoMill was a ‘silver bullet’ for GIGA steel processing. The robust monobloc housing and a fully controlled manufacturing process guarantee fabrication of the strongest cold rolling mill. It will have 180,000 tonnes capacity, and will process ultra-high strength steel from 0.5mm to 2.5mm thickness on the strip width from 800mm to 1,650mm. In addition, DMS 20Hi EcoMill also provides enhanced productivity thanks to the advanced strip wiping and strip cooling technologies, Push-push 1 st intermediate roll shifting system to reduce the risk of broken parts, improved strip surface quality due to the advanced strip cooling and flatness control system and quick and safe maintenance with minimal downtime due to easy access.

Orbital Tig Welding System

Closed heads

Open heads

Our welding equipment guarantees high-quality results. If all parameters- including the preparation- remain the same, the same level of quality is guaranteed, weld after weld.

www.axxair.com

POSCO

www.posco.com

Fives

www.fivesgroup.com

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SEPTEMBER 2020