US1949313A - Process for improving cobaltmolybdenum alloys - Google Patents
Process for improving cobaltmolybdenum alloys Download PDFInfo
- Publication number
- US1949313A US1949313A US521391A US52139131A US1949313A US 1949313 A US1949313 A US 1949313A US 521391 A US521391 A US 521391A US 52139131 A US52139131 A US 52139131A US 1949313 A US1949313 A US 1949313A
- Authority
- US
- United States
- Prior art keywords
- alloys
- cobaltmolybdenum
- improving
- cobalt
- molybdenum
- 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.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
Definitions
- This invention relates to cobalt-molybdenum alloys.
- cobalt-molybdenum alloys can be 5 hardened by a special heat treatment. If rolled or cast alloys containing to 35% of molybdenum be heated to a temperature above 1000 C.
- a process for obtaining alloys of high hardness consisting in forming an alloy of 10 to 35% of molybdenum and the balance substantially cobalt and heating said alloy to a temperature above 1000 C. and below the melting point of the alloy, then rapidly cooling said alloy and subsequently annealing it at temperatures between 500 and 900 C.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Description
Patented Feb. 27, 19354 TATES UNii'Eh FATE FEQE
Wei-nei- Koster, Dortmund, Germany, assignor to Vereinigte Stahlwerkc Aktiengesellschaft, Dusseldori, Germany No Drawing. Application March 9, 1931, Serial No. 521,391. In Germany July 4, 1930 2 Claims.
This invention relates to cobalt-molybdenum alloys.
It has been ascertained by exhaustive experiments that cobalt-molybdenum alloys can be 5 hardened by a special heat treatment. If rolled or cast alloys containing to 35% of molybdenum be heated to a temperature above 1000 C.
and thereupon cooled with sufilcient rapidity in air or by immersion in water or oil and finally 10 heated to temperatures between 500 to 900 C.
then the mechanical properties of the alloys will be very substantially increased in relation to those prior to said heat treatment. If for example, an alloy containing 75% of cobalt and 13 of molybdenum be heated to 1200 C.,
quenched in water and annealed for one hour at 800 C. the hardness increases from 165 Brinell in the untreated state to 215 Brinell. On
occasion there may be added to these improvable alloys, one or more other elements, such as copper, aluminium, iron, nickel, chromium and manganese in amounts up to Moreover the mechanical properties of such alloys can be considerably improved by a suitable heat treat ment, such as hereinbefore described.
It is to be understood that certain quantities of other metals such as'Cu, Al, Fe, Ni, Cr, Mn,
may be combined with the binary alloys described,
such as will not injuriously affect the nature of such alloys and which may to some extent modify their properties and render them more suitable for special requirements, without however affecting their ability to precipitation hardening, depending upon the fact that the principal part of the alloys consists of cobalt and molybdenum; It. is to be understood that such compositions are covered by the phrase the balance substantially cobalt, used in the ensuing claims.
I claim: 1
1. A process for obtaining alloys of high hardness consisting in forming an alloy of 10 to 35% of molybdenum and the balance substantially cobalt and heating said alloy to a temperature above 1000 C. and below the melting point of the alloy, then rapidly cooling said alloy and subsequently annealing it at temperatures between 500 and 900 C.
2. An alloy containing 10 to 35% of molyb- .denum and the balance substantially cobalt, hav- WERNER KCSSTER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1949313X | 1930-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1949313A true US1949313A (en) | 1934-02-27 |
Family
ID=7750900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US521391A Expired - Lifetime US1949313A (en) | 1930-07-04 | 1931-03-09 | Process for improving cobaltmolybdenum alloys |
Country Status (1)
Country | Link |
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US (1) | US1949313A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2475642A (en) * | 1944-09-29 | 1949-07-12 | Westinghouse Electric Corp | Mechanical element which is to be subjected to high temperatures |
US2524660A (en) * | 1947-05-03 | 1950-10-03 | Elgin Nat Watch Co | Watch mainspring |
US2678894A (en) * | 1947-05-03 | 1954-05-18 | Elgin Nat Watch Co | Process of making articles of high elastic strength |
US3180012A (en) * | 1963-07-12 | 1965-04-27 | Du Pont | Cobalt alloys |
US3243289A (en) * | 1963-09-24 | 1966-03-29 | John J Rausch | Cobalt base alloys containing molybdenum |
-
1931
- 1931-03-09 US US521391A patent/US1949313A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2475642A (en) * | 1944-09-29 | 1949-07-12 | Westinghouse Electric Corp | Mechanical element which is to be subjected to high temperatures |
US2524660A (en) * | 1947-05-03 | 1950-10-03 | Elgin Nat Watch Co | Watch mainspring |
US2678894A (en) * | 1947-05-03 | 1954-05-18 | Elgin Nat Watch Co | Process of making articles of high elastic strength |
US3180012A (en) * | 1963-07-12 | 1965-04-27 | Du Pont | Cobalt alloys |
US3243289A (en) * | 1963-09-24 | 1966-03-29 | John J Rausch | Cobalt base alloys containing molybdenum |
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