US3175287A - Preparation of magnesium seamless rings - Google Patents
Preparation of magnesium seamless rings Download PDFInfo
- Publication number
- US3175287A US3175287A US137745A US13774561A US3175287A US 3175287 A US3175287 A US 3175287A US 137745 A US137745 A US 137745A US 13774561 A US13774561 A US 13774561A US 3175287 A US3175287 A US 3175287A
- Authority
- US
- United States
- Prior art keywords
- magnesium
- ring
- preparation
- rings
- seamless
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
Definitions
- This invention relates to the ring forging or ring rolling of magnesium ring blanks and is more particularly concerned With a method for the manufacture of seamless rings whereby the properties thereof are enhanced.
- the rolled or forged article exhibits anisotropic properties.
- the tangential properties are greater than the axial properties when the prior art methods of preparing large seamless rings are employed.
- Prior art methods for the manufacture of magnesium seamless rings included the provision of a ring blank defining an 0, upsetting the ring blank to obtain a larger ring diameter, and thereafter hot working the upset ring blank thereby to increase both diameters and to prepare a seamless ring.
- the method of the present invention differs from the known art of producing large seamless rings by omitting the step of upsetting. It was unexpectedly found that when the magnesium ring blank was directly hot worked, without upsetting, the mechanical properties of the resulting ring were found to be essentially isotropic in both the tangential and axial directions.
- Magnesium and magnesium base alloys, wherein the alloys contain at least 75% magnesium are suitable for use in the present invention.
- Hot Working of the present invention may be accomplished in the conventional manner of ring forging or hot rolling of the ring blank. Hot working according to the present invention should increase both the internal and external diameter of the ring blank.
- a direct chill cast ingot having a 6.5" diameter and extruded stock having a 4" diameter were upset to 8" and 6" diameters respectively at 800 F.
- the two step process for forming magnesium and magnesium base alloy 0 rings having isotropic physical properties which consists of a first step of providing an unworked cast ring blank defining an 0 and a second step of directly hot working said blank to increase both diameters of said blank.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
United States Patent 3,175,287 PREPARATION OF MAGNESE UM SEAMLESS RENGS John F. Pashak, Linwood, Mich, assignor to The Dow Chemical Company, Midland, Mich, a corporation of Delaware No Drawing. Filed Sept. 13, 1961, Ser. No. 137,745 1 Claim. ((31. 29-528) This invention relates to the ring forging or ring rolling of magnesium ring blanks and is more particularly concerned With a method for the manufacture of seamless rings whereby the properties thereof are enhanced.
Generally in metal shaping operations, especially in rolling and forging magnesium base alloys, an orientation of physical properties of the metal is noted. For example, the values exhibited in respect to the tensile yield strength and to a lesser degree the tensile strength and elongation are higher in the direction of metal flow than in a direction transverse to said flow. Thus, the rolled or forged article exhibits anisotropic properties. In the case of large seamless rings, the tangential properties are greater than the axial properties when the prior art methods of preparing large seamless rings are employed.
Prior art methods for the manufacture of magnesium seamless rings included the provision of a ring blank defining an 0, upsetting the ring blank to obtain a larger ring diameter, and thereafter hot working the upset ring blank thereby to increase both diameters and to prepare a seamless ring.
The method of the present invention differs from the known art of producing large seamless rings by omitting the step of upsetting. It was unexpectedly found that when the magnesium ring blank was directly hot worked, without upsetting, the mechanical properties of the resulting ring were found to be essentially isotropic in both the tangential and axial directions.
Magnesium and magnesium base alloys, wherein the alloys contain at least 75% magnesium are suitable for use in the present invention.
Hot Working of the present invention may be accomplished in the conventional manner of ring forging or hot rolling of the ring blank. Hot working according to the present invention should increase both the internal and external diameter of the ring blank.
The following example is given for the purpose of illustration but is not to be construed as limiting the invention thereto.
EXAMPLE A magnesium base alloy having the nominal composition of 2% thorium, 0.6% manganese, the balance being magnesium was provided.
For purposes of comparison, a direct chill cast ingot having a 6.5" diameter and extruded stock having a 4" diameter were upset to 8" and 6" diameters respectively at 800 F. There was also provided an 8" diameter direct chill cast ingot and a 6 diameter extruded billet. A 3" diameter mandrel hole was machined in each blank.
Each of the thus provided ring blanks were subjected to identical ring forging conditions wherein a reduction of 50 to was achieved with the following results:
Similar results have been achieved with rings having external diameters as large as 40 inches, internal diameters as large as 36 inches and a ring thickness as much as 10 inches.
Various modifications may be made in the process of the present invention without departing from the spirit or scope thereof and it is to be understood that I limit myself only as defined in the appended claim.
I claim:
The two step process for forming magnesium and magnesium base alloy 0 rings having isotropic physical properties which consists of a first step of providing an unworked cast ring blank defining an 0 and a second step of directly hot working said blank to increase both diameters of said blank.
References Cited by the Examiner UNITED STATES PATENTS 1,517,070 11/24 Jenkins 168 2,029,728 2/36 Lowry et a1. 2,064,323 12/36 Schmidt et a1. 29-5522 \VHITMORE A. WILTZ, Primary Examiner. HYLAND BIZOT, Examiner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US137745A US3175287A (en) | 1961-09-13 | 1961-09-13 | Preparation of magnesium seamless rings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US137745A US3175287A (en) | 1961-09-13 | 1961-09-13 | Preparation of magnesium seamless rings |
Publications (1)
Publication Number | Publication Date |
---|---|
US3175287A true US3175287A (en) | 1965-03-30 |
Family
ID=22478876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US137745A Expired - Lifetime US3175287A (en) | 1961-09-13 | 1961-09-13 | Preparation of magnesium seamless rings |
Country Status (1)
Country | Link |
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US (1) | US3175287A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5101547A (en) * | 1989-03-28 | 1992-04-07 | Kawasaki Jukogyo Kabushiki Kaisha | Method and system for manufacturing superalloy disk |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1517070A (en) * | 1920-09-23 | 1924-11-25 | Dow Chemical Co | Piston ring |
US2029728A (en) * | 1934-02-12 | 1936-02-04 | Dow Chemical Co | Rolling magnesium alloys |
US2064323A (en) * | 1930-08-16 | 1936-12-15 | Magnesium Dev Corp | Process of forging magnesium and high percentage magnesium alloys |
-
1961
- 1961-09-13 US US137745A patent/US3175287A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1517070A (en) * | 1920-09-23 | 1924-11-25 | Dow Chemical Co | Piston ring |
US2064323A (en) * | 1930-08-16 | 1936-12-15 | Magnesium Dev Corp | Process of forging magnesium and high percentage magnesium alloys |
US2029728A (en) * | 1934-02-12 | 1936-02-04 | Dow Chemical Co | Rolling magnesium alloys |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5101547A (en) * | 1989-03-28 | 1992-04-07 | Kawasaki Jukogyo Kabushiki Kaisha | Method and system for manufacturing superalloy disk |
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