Die materials development task force
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Die Materials Development Task Force. Oak Ridge National Laboratory June 13, 2007. Areas of Interest. New die materials to increase die life Ferrous materials Non-ferrous materials New die materials to decrease cycle time – (i.e. increase productivity)

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Die Materials Development Task Force

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Die materials development task force

Die Materials Development Task Force

Oak Ridge National Laboratory

June 13, 2007


Areas of interest

Areas of Interest

  • New die materials to increase die life

    • Ferrous materials

    • Non-ferrous materials

  • New die materials to decrease cycle time – (i.e. increase productivity)

    • High thermal conductivity materials


Die materials development task force

Goal

  • To obtain field information to validate laboratory testing information

  • To assist in providing information for the Specification Task Force


Trials at die caster

Trials at Die Caster

  • Need multi-cavity die or single die with documented history.

  • Need to log information for appropriate record keeping on form that was developed


Trials at st clair die casting

Trials at St. Clair Die Casting

Tank Tread Heat Sink

  • Four Cavity Die

  • 181,000 Shots, Removed in 5/20/04

    • Dievar looks best, slight heat checks (5x life of H13)

      • 41HRC lowest

      • Placed back in AM703, run to 220,000 shots

    • QRO-90 welded 5 times, break-out, but better than H13

      • 37 HRC lowest

  • New Dievar Die (AM596) – 173,510 Shots Removed 12/12/04 Minimal heat checks at ejectors

  • Pre-Hardened Dievar Die (AM703) – 47,000 shots

    • 42-43 HRC

    • Break-outs and sharp edges

    • Pulled when AM080 was placed in service


Trials at st clair die casting1

Trials at St. Clair Die Casting

  • High Speed Machined Dievar (AM080)

    • 48- 49 HRC

    • 66,000 shots before breakout

    • 95,000 shots, breakout no worse

    • 122,000 shots, some breakout, some light heat checking.

    • 161,000 shots, some breakout, soon will violate flatness callout.

    • 168,000 shots, no changes.

    • 174,872 shots, no appreciable change.


Tank tread heat sink

Tank Tread Heat Sink


Allvac nickel alloys

Allvac Nickel Alloys


Allvac nickel alloys1

Allvac Nickel Alloys

  • Tested numerous alloys

  • Found that nickel alloys were cracking by corrosion fatigue, not thermal fatigue.

  • VacDie 34

    • Heat treatment makes difference

    • TMP is important

    • Ready for in-plant trials


Vacdie 34

VacDie 34

  • Trial at Premier Tool & Die Cast Corp.

    • Two cavity die – steering column tilt housing

    • 25,000 crack initiation

    • 100,000 shots for replacement

  • Premier has material

    • Got past machining problems

    • Allvac provided parameters

    • Die rough machined and heat treated

    • In final machining


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