US3282687A - Iron-base alloys - Google Patents
Iron-base alloys Download PDFInfo
- Publication number
- US3282687A US3282687A US255202A US25520263A US3282687A US 3282687 A US3282687 A US 3282687A US 255202 A US255202 A US 255202A US 25520263 A US25520263 A US 25520263A US 3282687 A US3282687 A US 3282687A
- Authority
- US
- United States
- Prior art keywords
- iron
- alloy
- base alloys
- cobalt
- nickel
- 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
Links
- 229910045601 alloy Inorganic materials 0.000 title description 12
- 239000000956 alloy Substances 0.000 title description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 239000010941 cobalt Substances 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005552 hardfacing Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
Definitions
- a primary object of the invention is to provide an alloy of this type which has good work hardening characteristics, is machinable with carbide cutting tools, and has good high temperature properties, rendering the alloy particularly suitable for use in making dies, forgings, etc.
- Another object of the invention is to provide an alloy of the character described having a desired coefiicient of expansion, which is between that of ferrite type material, such as plain carbon steel, and material which is entirely austenitic, such as stainless steel.
- a further object of the invention is to provide an alloy of the character described, in which cobalt is present in fairly critical amounts which produce a desirable structure intermediate that of a ferrite material and a wholly austenitic material, andwhich may be termed an unstable austenite.
- Nickel 3-5 Percent Cobalt 7 9 Silicon, max 1.0 Iron Balance A preferred alloy, within this range, will contain about 1.5% carbon, about 22% chromium, about 2% molybdenum, about 4% nickel, about 8% cobalt, and the balance substantially all iron.
- the chromium be maintained within the aforesaid narrow range, in order that the first crystallization from the liquid is primarily austenite.
- the nickel and cobalt should be maintained in balance, that is to say, the cobalt should be increased as the nickel is increased.
- the alloy is particularly adapted as a coating or hardfacing for internal combustion engine valves, as, for example, poppet valves.
- An iron-base alloy consisting of from about 1.25%
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Description
United States Patent 3,232,687 HRGN-BASE ALLOYS Arthur T. Cape, Monterey, Califi, assignor to Coast Metals Inc, Little Ferry, NJ., a corporation of Delaware No Drawing. Filed Jan. 31, 1963, Ser. No. 255,202 1 Claim. (Cl. 75-128) This invention relates generally to iron-base alloys, but has reference more particularly to an alloy of this type which contains substantial amounts of chromium, nickel and cobalt.
A primary object of the invention is to provide an alloy of this type which has good work hardening characteristics, is machinable with carbide cutting tools, and has good high temperature properties, rendering the alloy particularly suitable for use in making dies, forgings, etc.
Another object of the invention is to provide an alloy of the character described having a desired coefiicient of expansion, which is between that of ferrite type material, such as plain carbon steel, and material which is entirely austenitic, such as stainless steel.
A further object of the invention is to provide an alloy of the character described, in which cobalt is present in fairly critical amounts which produce a desirable structure intermediate that of a ferrite material and a wholly austenitic material, andwhich may be termed an unstable austenite.
These desired characteristics are obtained in an alloy which falls within the following ranges of ingredients:
Percent Carbon 1.25-1.75 Chromium 21-23 Molybdenum 12.5
Nickel 3-5 Percent Cobalt 7 9 Silicon, max 1.0 Iron Balance A preferred alloy, within this range, will contain about 1.5% carbon, about 22% chromium, about 2% molybdenum, about 4% nickel, about 8% cobalt, and the balance substantially all iron.
It is important that the chromium be maintained within the aforesaid narrow range, in order that the first crystallization from the liquid is primarily austenite.
For best results, the nickel and cobalt should be maintained in balance, that is to say, the cobalt should be increased as the nickel is increased.
The alloy is particularly adapted as a coating or hardfacing for internal combustion engine valves, as, for example, poppet valves.
Having thus described my invention, I claim:
An iron-base alloy consisting of from about 1.25%
to about 1.75% carbon, from about 21% to about 23% References Cited by the Examiner UNITED STATES PATENTS 5/1937 Oertel -128 8/1950 Payson 75-128 DAVID L. RECK, Primary Examiner.
P. WEINSTEIN, Assistant Examiner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US255202A US3282687A (en) | 1963-01-31 | 1963-01-31 | Iron-base alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US255202A US3282687A (en) | 1963-01-31 | 1963-01-31 | Iron-base alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3282687A true US3282687A (en) | 1966-11-01 |
Family
ID=22967285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US255202A Expired - Lifetime US3282687A (en) | 1963-01-31 | 1963-01-31 | Iron-base alloys |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3282687A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363660A (en) * | 1979-04-04 | 1982-12-14 | Mitsubishi Kinzoku Kabushiki Kaisha | Iron-base alloy having high resistance to molten zinc attack |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1630448A (en) * | 1922-01-09 | 1927-05-31 | Glockenstahlwerke Ag Vorm Rich | Steel alloy |
| US2518715A (en) * | 1947-08-15 | 1950-08-15 | Crucible Steel Co America | Heat-and corrosion-resisting alloy steel and articles thereof |
-
1963
- 1963-01-31 US US255202A patent/US3282687A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1630448A (en) * | 1922-01-09 | 1927-05-31 | Glockenstahlwerke Ag Vorm Rich | Steel alloy |
| US2518715A (en) * | 1947-08-15 | 1950-08-15 | Crucible Steel Co America | Heat-and corrosion-resisting alloy steel and articles thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363660A (en) * | 1979-04-04 | 1982-12-14 | Mitsubishi Kinzoku Kabushiki Kaisha | Iron-base alloy having high resistance to molten zinc attack |
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