JPS55145137A - Hard gold alloy watch case and its manufacture - Google Patents
Hard gold alloy watch case and its manufactureInfo
- Publication number
- JPS55145137A JPS55145137A JP5240079A JP5240079A JPS55145137A JP S55145137 A JPS55145137 A JP S55145137A JP 5240079 A JP5240079 A JP 5240079A JP 5240079 A JP5240079 A JP 5240079A JP S55145137 A JPS55145137 A JP S55145137A
- Authority
- JP
- Japan
- Prior art keywords
- watch case
- alloy
- manufacture
- gold alloy
- soln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
Abstract
PURPOSE: To manufacture an Au alloy watch case with superior mechanical strength, hardness and corrosion resistance by subjecting an Al alloy contg. Ag, Cu, Pd, Pt and other specified metal elements to soln. heat treatment followed by working, surface polishing and aging.
CONSTITUTION: An Au alloy material contg. Au 52W68%, Ag 17W23%, Cu 16W 22%, Pd 1W3%, Pt<5% and Co, Ni, Cd, Zn and Mn each ≤1% is heated at 600W780°C for 5W30min and quenched with water of 15°C or below or liq. nitrogen to perform soln. heat treatment. This material is formed into a watch case by mechanical working, surface-finished by polishing, and maintained at 280W450°C for 15minW20hr to accomplish precipitation hardening by aging, thus manufacturing an Au alloy watch case having a Vickers hardness of 280W320 and high mechanical strength such as a tensile strength of 87kg/mm2 comparable to the tensile strength of special steel.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5240079A JPS55145137A (en) | 1979-04-27 | 1979-04-27 | Hard gold alloy watch case and its manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5240079A JPS55145137A (en) | 1979-04-27 | 1979-04-27 | Hard gold alloy watch case and its manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55145137A true JPS55145137A (en) | 1980-11-12 |
Family
ID=12913746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5240079A Pending JPS55145137A (en) | 1979-04-27 | 1979-04-27 | Hard gold alloy watch case and its manufacture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55145137A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5180551A (en) * | 1991-10-30 | 1993-01-19 | Leach & Garner Co. | Gold alloys of exceptional yellow color and reversible hardness |
-
1979
- 1979-04-27 JP JP5240079A patent/JPS55145137A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5180551A (en) * | 1991-10-30 | 1993-01-19 | Leach & Garner Co. | Gold alloys of exceptional yellow color and reversible hardness |
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