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Evaluation of Special Quality Die Steels NADCA Project Die Materials Committee Purdue – Oct. 2009.

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Presentation on theme: "Evaluation of Special Quality Die Steels NADCA Project Die Materials Committee Purdue – Oct. 2009."— Presentation transcript:

1 Evaluation of Special Quality Die Steels NADCA Project Die Materials Committee Purdue – Oct. 2009

2 BohlerUddeholm Dievar Thyssen E38K Thyssen 2367 Ellwood ExELL Tuf-Die SAMPLES-Phase I 4- Thermal fatigue samples quenched in oil, triple tempered to 44-46HRC 5- 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). 5- Charpy V-notch quenched in vacuum and triple tempered to HRC (cut from plate that was welded to a 16” block). STEELS

3 BohlerUddeholm Dievar Thyssen E38K Thyssen 2367 Ellwood ExELL Tuf-Die SAMPLES-Phase II 4- Thermal fatigue samples quenched in oil, triple tempered to 48-50HRC 5- Charpy V-notch, heat treated in oil and triple tempered to 48-50HRC. 4- Thermal fatigue samples quenched in a vacuum furnace and triple tempered to 48-50HRC (welded to a 16” block). 5- Charpy V-notch quenched in vacuum and triple tempered to HRC (cut from plate that was welded to a 16” block). STEELS

4 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

5 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

6 2367 and E38K

7 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 (44-46HRC)

8 IDHRC12345Av. Dievar E38K Tuf-Die CAPABILITY HEAT TREATMENT (Oil Quench and Triple Tempered to 44-46HRC)

9 CD BOHLER- UDDEHOLMDIEVAR 45 FOIL1080 F C2 SCHMOLZ & BIKENBACH min 1885 FOIL1080 F EE SCHMOLZ & BIKENBACHE38K 45 min 1850 FOIL1070 F ET ELLWOOD SPECIALTYTUF-DIE 45 min 1885 FOIL1080 F NADCA GRADE ID SUPPLIER TYPE AUSTENITIZING TEMPERx3 CAPABILITY HEAT TREATMENT (48-50HRC)

10 IDHRC12345Av. Dievar E38K Tuf-Die CAPABILITY HEAT TREATMENT (Oil Quench and Triple Tempered to 48-50HRC)

11

12 IDHRC12345Av. % of Capability Dievar % % E38K % Tuf- Die % VACUUM HEAT TREATMENT (Triple Tempered to 44-46HRC)

13 Average Maximum Crack Length Superior Steels (Oil quench) 44-46HRC

14 Total Crack Area Superior Steels (Oil Quench) 44-46HRC

15 Average Maximum Crack Length Superior Steels (Vacuum Quench) 44-46HRC

16 Total Crack Area Superior Steels (Vacuum Quench) 44-46HRC

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


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