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Usibor® and Ductibor® laser welded blanks

 

ArcelorMittal Tailored Blanks has developed hot stamped laser welded blanks (LWBs) which combine the benefits of press hardenable steels (PHS) with laser welding technology. Thanks to the high performance of PHS in hot stamping, many of these new applications can often be stamped as one part. This reduces production and assembly time as well as cost.

ArcelorMittal offers two families of PHS: Usibor® and Ductibor®. Designed to be used together in the same LWB, Usibor® gives the final part its strength, while Ductibor® offers controlled ductility to improve crash performance.

Using Usibor® and Ductibor®, the weight of a part can be significantly reduced while achieving optimal crash behavior.

First generation Second generation
Usibor® 1500

Ductibor® 450

Ductibor® 500

Usibor® 2000 Ductibor® 1000

 

ArcelorMittal’s second generation of press hardenable steels (PHS) for hot stamping has recently been launched.

Our press hardenable steels

The use of hot stamped LWBs is forecast to rise over the coming years

Examples of LWB parts which benefit from the properties of Usibor® and Ductibor®

  • Front rails

  • Front rails

  • Seat cross members

  • Door ring

  • Heel board

  • Rear rails

ArcelorMittal Global R&D automotive teams have used PHS for hot stamping to develop a range lightweight LWB parts including an award-winning single-piece door ring

 

Second generation Usibor® and Ductibor® available

The introduction of ArcelorMittal’s second generation of press hardenable steels (PHS), OEMs have access to a new set of weight reduction tools. Usibor® 2000 and Ductibor® 1000 give vehicle designers new freedom to create lightweight mobility solutions. At the same time, Usibor® 2000 and Ductibor® 1000 are compatible with standard press hardening technologies and processes.

 

 “Usibor® 2000 could typically bring 10 to 15 percent weight savings when compared to existing hot stamping solutions.”

Jean-Luc Thirion, head of ArcelorMittal Global R&D for automotive

 

ArcelorMittal’s recent S-in motion® projects for mid-size sedans and SUVs have shown that weight savings of up to 26 percent are achievable on the body-in-white (BIW) with second generation PHS.

Usibor® 2000 and Ductibor® 1000 have both been qualified for use by most major carmakers around the world.

Usibor® 2000 is over 30 percent stronger than its popular predecessor, Usibor® 1500. According to Jean-Luc Thirion, head of ArcelorMittal Global R&D for automotive: “Usibor® 2000 could typically bring 10 to 15 percent weight savings when compared to existing hot stamping solutions.”

 

Combining Usibor® and Ductibor® into a single laser welded blank

Although Usibor® 2000 and Ductibor® 1000 can be used to form monolithic parts, the two steels are designed to be combined into a single LWB. The LWBs created from this combination offer significant advantages including:

  • Weight savings
  • Improved crash behavior
  • Cost savings through material and manufacturing optimization

LWBs can combine Usibor® 2000, Usibor® 1500, Ductibor® 1000, and/or Ductibor® 500 to ensure the right steel is in exactly the right place.

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