Evaluation of Special Quality Die Steels NADCA Project Die Materials Specifications Task Group Wheeling, IL - February 2009.

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Evaluation of Special Quality Die Steels NADCA Project Die Materials Specifications Task Group Wheeling, IL - February 2009

BohlerUddeholm Dievar Thyssen E38K Thyssen 2367 Ellwood ExELL Tuf-Die SAMPLES 4- Thermal fatigue samples quenched in oil, triple tempered to 44-46HRC 10- Charpy V-notch, heat treated in oil and triple tempered to 44-46HRC. 4- Thermal fatigue samples quenched in a vacuum furnace and triple tempered to 44-46HRC (welded to a 16” block). 10- Charpy V-notch quenched in oil and triple tempered to HRC (cut from plate that was welded to a 16” block). STEELS

Flow Chart for Die Steel Evaluation Cut blanks for Thermal Fatigue and Charpy V-notch Receive steel block – mark grain orientation Rough machine CVN “potential” Oil quench CVN “potential” Vacuum quench Thermal Fatigue and CVN plate Rough machine Thermal Fatigue and CVN plate Finish/ Grind Thermal Fatigue and Charpy V-notch Test Thermal Fatigue and Charpy V-notch Impact Report Thermal Fatigue and CVN Results

Cutting line 8’’ 7’’ 8’’ 2.125’’ Charpy impact specimens are taken from the “red” bar as shown in page ’’ 2.3’’ * taken from a 12" thick x 10" wide slab Thickness direction Length direction

2367 and E38K

CD BOHLER- UDDEHOLMDIEVAR1850 FOIL1125 F C2 SCHMOLZ & BIKENBACH FOIL1125 F EE SCHMOLZ & BIKENBACHE38K1850 FOIL1115 F ET ELLWOOD SPECIALTYTUF-DIE1885 FOIL1125 F NADCA GRADE ID SUPPLIER TYPE AUSTENITIZING TEMPERx3 CAPABILITY HEAT TREATMENT

IDHRC12345Av. Dievar E38K Tuf-Die CAPABILITY HEAT TREATMENT (Oil Quench)

IDHRC12345Av. % of Capability Dievar % % E38K % Tuf- Die % VACUUM HEAT TREATMENT

Average Maximum Crack Length Superior Steels (Oil quench)

Total Crack Area Superior Steels (Oil Quench)

Average Maximum Crack Length Superior Steels (Vacuum Quench)

Total Crack Area Superior Steels (Vacuum Quench)

SET-UP for Vacuum Heat Treatment of the Special Steels

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