Club heads with bounded face to body yield strength ratio and related methods
Some embodiments include a club head with a bounded face to body yield strength ratio. Other embodiments of related club heads and methods are also disclosed.
1. A golf club head comprising:
a face portion comprising a first material having a first yield strength, the first yield strength being greater than or equal to approximately 1303 MegaPascals; and
a support body comprising a second material having a second yield strength, the support body being configured to be coupled to the face portion, the second yield strength being greater than or equal to approximately 890 MegaPascals;
wherein:
the first material comprises a first titanium alloy;
the second material comprises a second titanium alloy;
the second material of the support body is only located within 0.40 centimeter from a region of the club head where the face portion transitions to the support body;
the first material of the face portion being subjected to a first heat treating step for approximately 60 minutes at a temperature equal to or greater than 600 degrees Celsius, followed by a quenching cooling process, followed by the first material being subjected to a second heat treating step for a period of time greater than 6 hours at a temperature greater than or equal to 500 degrees Celsius; and
a yield strength ratio of the second yield strength to the first yield strength is greater than or equal to approximately 0.50.
2. The golf club head of claim 1 wherein:
the yield strength ratio is greater than or equal to approximately 0.63.
3. The golf club head of claim 1 wherein:
the first yield strength is greater than or equal to approximately 1378 MegaPascals.
4. The golf club head of claim 1 wherein:
the second yield strength is greater than or equal to 900 MegaPascals.
5. The golf club head of claim 1 wherein:
the first yield strength is greater than or equal to approximately 1655 MegaPascals.
6. The golf club head of claim 1 wherein:
the second yield strength is greater than or equal to approximately 1000 MegaPascals.
7. The golf club head of claim 1 wherein:
the face portion consists essentially of the first material.
8. The golf club head of claim 1 wherein:
the support body comprises a crown support body;
the golf club head comprises a crown, and the crown comprises the crown support body; and
the crown support body consists essentially of the second material.
9. The golf club head of claim 1 wherein:
the support body comprises a sole support body;
the golf club head comprises a sole, and the sole comprises the sole support body; and
the sole support body consists essentially of the second material.
10. The golf club head of claim 1 wherein:
the face portion comprises a face insert;
the golf club head comprises a face comprising the face insert; and
the face insert comprises a face insert front surface, a face insert rear surface opposite the face insert front surface, and a face insert perimeter edge.
11. The golf club head of claim 1 wherein:
the face portion comprises at least one of a crown face portion or a sole face portion;
the golf club head comprises a crown and a sole;
when the face portion comprises the crown face portion, the crown comprises the crown face portion; and
when the face portion comprises the sole face portion, the sole comprises the sole face portion.
12. The golf club head of claim 1 wherein at least one of:
the first material comprises one of iron or titanium;
the second material comprises one of iron or titanium; or
the face portion comprises a face center, and a thickness of the face portion at the face center is less than or equal to approximately 0.2540 centimeters.
13. The golf club head of claim 12 wherein:
the thickness of the face portion at the face center is less than or equal to approximately 0.1905 centimeters.
14. The golf club head of claim 1 wherein:
the golf club head comprises a wood-type golf club head.
15. A golf club head comprising:
a face portion comprising a first material having a first yield strength, the first yield strength being greater than or equal to approximately 1034 MegaPascals; and
a support body comprising a second material having a second yield strength, the support body being configured to be coupled to the face portion;
wherein:
the second material of the support body is only located within 0.40 centimeter from a region of the club head where the face portion transitions to the support body;
the first material of the face portion being subjected to a first heat treating step for approximately 60 minutes at a temperature equal to or greater than 600 degrees Celsius, followed by a quenching cooling process, followed by the first material being subjected to a second heat treating step for a period of time greater than 6 hours at a temperature greater than or equal to 500 degrees Celsius; and
a yield strength ratio of the second yield strength to the first yield strength is greater than or equal to approximately 0.50.
16. The golf club head of claim 15 wherein:
the yield strength ratio is greater than or equal to approximately 0.63.
17. The golf club head of claim 15 wherein:
the first yield strength is greater than or equal to approximately 1378 MegaPascals.
18. The golf club head of claim 15 wherein:
the second yield strength is greater than or equal to 900 MegaPascals.
19. A method of manufacturing a golf club head, the method comprising:
providing a face portion comprising a first material having a first yield strength, the first yield strength being greater than or equal to approximately 1378 MegaPascals; and
providing a support body comprising a second material having a second yield strength, the support body being configured to be coupled to the face portion;
wherein:
the first material of the face portion being subjected to a first heat treating step for approximately 60 minutes at a temperature equal to or greater than 600 degrees Celsius, followed by a quenching cooling process, followed by the first material being subjected to a second heat treating step for a period of time greater than 6 hours at a temperature greater than or equal to 500 degrees Celsius;
the first material comprises a first titanium alloy;
the second material comprises a second titanium alloy having a second yield strength greater than or equal to 890 MegaPascals;
the second material of the support body is only located within 0.40 centimeter from a region of the club head where the face portion transitions to the support body; and
a yield strength ratio of the second yield strength to the first yield strength is greater than or equal to approximately 0.50.
20. The method of claim 19 further comprising:
coupling the face portion to the support body, wherein:
coupling the face portion to the support body comprises welding the face portion to the support body.