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

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Presentation on theme: "Evaluation of Special Quality Die Steels NADCA Project Die Materials Specifications Task Group Wheeling, IL - February 2009."— Presentation transcript:

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

2 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 44- 46HRC (cut from plate that was welded to a 16” block). STEELS

3 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

4 Cutting line 8’’ 7’’ 8’’ 2.125’’ Charpy impact specimens are taken from the “red” bar as shown in page 2. 2.215’’ 2.3’’ * taken from a 12" thick x 10" wide slab Thickness direction Length direction

5 2367 and E38K

6 CD BOHLER- UDDEHOLMDIEVAR1850 FOIL1125 F C2 SCHMOLZ & BIKENBACH23671885 FOIL1125 F EE SCHMOLZ & BIKENBACHE38K1850 FOIL1115 F ET ELLWOOD SPECIALTYTUF-DIE1885 FOIL1125 F NADCA GRADE ID SUPPLIER TYPE AUSTENITIZING TEMPERx3 CAPABILITY HEAT TREATMENT

7 IDHRC12345Av. Dievar4421 20 20.7 23674614 1312 13.3 E38K442423 22 22.7 Tuf-Die452120 101919.7 CAPABILITY HEAT TREATMENT (Oil Quench)

8 IDHRC12345Av. % of Capability Dievar43.718 17 1617.3 84% 236742.31514 1314.0 105% E38K43.016 15 15.3 68% Tuf- Die 44.01716 1416.0 81% VACUUM HEAT TREATMENT

9 Average Maximum Crack Length Superior Steels (Oil quench)

10 Total Crack Area Superior Steels (Oil Quench)

11 Average Maximum Crack Length Superior Steels (Vacuum Quench)

12 Total Crack Area Superior Steels (Vacuum Quench)

13 SET-UP for Vacuum Heat Treatment of the Special Steels

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