US3307939A - Corrosion-resisting cobalt-chromium-tungsten alloys - Google Patents
Corrosion-resisting cobalt-chromium-tungsten alloys Download PDFInfo
- Publication number
- US3307939A US3307939A US372089A US37208964A US3307939A US 3307939 A US3307939 A US 3307939A US 372089 A US372089 A US 372089A US 37208964 A US37208964 A US 37208964A US 3307939 A US3307939 A US 3307939A
- Authority
- US
- United States
- Prior art keywords
- chromium
- cobalt
- corrosion
- alloys
- 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
Links
- 229910001080 W alloy Inorganic materials 0.000 title claims description 12
- NKRHXEKCTWWDLS-UHFFFAOYSA-N [W].[Cr].[Co] Chemical compound [W].[Cr].[Co] NKRHXEKCTWWDLS-UHFFFAOYSA-N 0.000 title claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 20
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 18
- 239000011733 molybdenum Substances 0.000 claims description 18
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 description 19
- 239000010949 copper Substances 0.000 description 19
- 229910045601 alloy Inorganic materials 0.000 description 18
- 239000000956 alloy Substances 0.000 description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000004580 weight loss Effects 0.000 description 7
- 238000007792 addition Methods 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 229910000684 Cobalt-chrome Inorganic materials 0.000 description 2
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical compound [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 2
- 239000010952 cobalt-chrome Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- -1 chromium-tungsten carbides Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- FZUJWWOKDIGOKH-UHFFFAOYSA-N sulfuric acid hydrochloride Chemical compound Cl.OS(O)(=O)=O FZUJWWOKDIGOKH-UHFFFAOYSA-N 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3046—Co as the principal constituent
-
- 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
- (Cl. 75134) Cobalt-chromium-tungsten alloys having a high abrasion resistance and high-temperature stability and, containing a relatively large amount of carbon consistin their as-cast and as-welded conditions substantially of a large amount of hard chromium-tungsten carbides, which are embedded in a non transforming, cubic face-centered, tough cobalt-chromium matrix.
- the cooperation of the hard carbides and the tough matrix is responsible for the high abrasion resistance and high-temperature stability of these alloys.
- the two main constituents of the structure are also decisive for the corrosion behavior. Whereas the carbides are hardly susceptible to hydrochloric acid and sulfuric acid, these acids attack the cobalt-chromium matrix.
- the carbide lattice loses its coherence and can readily be detached by mechanical means from the core which has not yet been attacked. Hence, the resistance to corrosion can be improved only by an improvement of the resistance of the matrix in which the carbides are embedded.
- the present invention provides cobalt-chromium-tungsten alloys which contain additions of copper and, if desired, molybdenum, for a substantially increased resistance to corrosion.
- Two alloys having the following composition have been prepared bymelting:
- Table indicates the weight losses of samples of welds of conventional oobalt-chromium-tungsten alloys under corresponding conditions. A comparison of the weight losses indicated in Tables 4 and 5 shows the superiority of the alloys which contain copper, or copper and molybdenum, over the conventional alloys.
- the fine structure show that the addition of copper and molybdenum does not appreciably aflfect the amount and nature of the precipitated carbides.
- the added copper and molybdenum are enriched mainly in the matrix to improve its resistance to corrosion.
- alloys 6 and 7 having the highest contents of copper and molybdenum do not have a higher resistance than the alloys 4 and 5 having lower contents of these elements. It is believed that the optimum composition of a cobalt-chromiumtungsten alloy having a high wear resistance and an increased resistance to corrosion, particularly by sulfuric acid :and similar media which do not have a very strong reducing action, is within the following limits:
- the matrix is dissolved out first so that the carbide remains on the sample alloys indicated in Table 3 are between 52 and and increase with increasing contents of copper and molybdenum.
- a corrosion-resisting cobalt-chromium-tungsten alloy consisting essentially of 2.22.5% c-arbon, 30-32% chromium, 13-20% tungsten, 39-47 cobalt, up to 1% manganese, up to 1% silicon, 0.36% copper and up to 6% molybdenum.
- a corrosion-resisting cobaltchromium-tungsten alloy consisting essentially of 2.2% carbon, 30% chromium, 14% tungsten, 46% cobalt, 4% molybdenum, 2% copper, up to 1% manganese, and up to 1% silicon.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Catalysts (AREA)
- Coating By Spraying Or Casting (AREA)
- Powder Metallurgy (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT445763A AT248711B (de) | 1963-06-04 | 1963-06-04 | Korrosionsbeständige Kobalt-Chrom-Wolfram-Legierungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3307939A true US3307939A (en) | 1967-03-07 |
Family
ID=3564265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US372089A Expired - Lifetime US3307939A (en) | 1963-06-04 | 1964-06-02 | Corrosion-resisting cobalt-chromium-tungsten alloys |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3307939A (OSRAM) |
| AT (1) | AT248711B (OSRAM) |
| CH (1) | CH457873A (OSRAM) |
| DE (1) | DE1219234B (OSRAM) |
| GB (1) | GB1005362A (OSRAM) |
| SE (1) | SE306835B (OSRAM) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3421890A (en) * | 1965-09-03 | 1969-01-14 | Boehler & Co Ag Geb | Fused corrosion resistant cobalt-chromium alloy |
| US3425827A (en) * | 1963-10-29 | 1969-02-04 | Boehler & Co Ag Geb | Corrosion-resisting cobalt-chromium-tungsten alloy |
| US20060210826A1 (en) * | 2005-03-21 | 2006-09-21 | Wu James B C | Co-based wire and method for saw tip manufacture and repair |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2299871A (en) * | 1941-03-31 | 1942-10-27 | Crobalt Inc | Cutting metal alloy |
| US2309372A (en) * | 1940-06-11 | 1943-01-26 | Haynes Stellite Co | Cutting tool |
| US2553609A (en) * | 1940-02-29 | 1951-05-22 | Schmidt Max | Weldable and high-temperature resisting hard alloys of cobalt and iron base |
| US2695844A (en) * | 1949-09-28 | 1954-11-30 | Armco Steel Corp | High-temperature cobalt base alloys |
| GB809088A (en) * | 1956-07-12 | 1959-02-18 | Deloro Stellite Ltd | A cobalt-chromium base alloy |
-
1963
- 1963-06-04 AT AT445763A patent/AT248711B/de active
-
1964
- 1964-01-30 DE DEB75234A patent/DE1219234B/de active Pending
- 1964-06-02 SE SE6687/64A patent/SE306835B/xx unknown
- 1964-06-02 US US372089A patent/US3307939A/en not_active Expired - Lifetime
- 1964-06-03 GB GB22950/64A patent/GB1005362A/en not_active Expired
- 1964-10-22 CH CH700164A patent/CH457873A/de unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553609A (en) * | 1940-02-29 | 1951-05-22 | Schmidt Max | Weldable and high-temperature resisting hard alloys of cobalt and iron base |
| US2309372A (en) * | 1940-06-11 | 1943-01-26 | Haynes Stellite Co | Cutting tool |
| US2299871A (en) * | 1941-03-31 | 1942-10-27 | Crobalt Inc | Cutting metal alloy |
| US2695844A (en) * | 1949-09-28 | 1954-11-30 | Armco Steel Corp | High-temperature cobalt base alloys |
| GB809088A (en) * | 1956-07-12 | 1959-02-18 | Deloro Stellite Ltd | A cobalt-chromium base alloy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3425827A (en) * | 1963-10-29 | 1969-02-04 | Boehler & Co Ag Geb | Corrosion-resisting cobalt-chromium-tungsten alloy |
| US3421890A (en) * | 1965-09-03 | 1969-01-14 | Boehler & Co Ag Geb | Fused corrosion resistant cobalt-chromium alloy |
| US20060210826A1 (en) * | 2005-03-21 | 2006-09-21 | Wu James B C | Co-based wire and method for saw tip manufacture and repair |
Also Published As
| Publication number | Publication date |
|---|---|
| CH457873A (de) | 1968-06-15 |
| SE306835B (OSRAM) | 1968-12-09 |
| DE1219234B (de) | 1966-06-16 |
| GB1005362A (en) | 1965-09-22 |
| AT248711B (de) | 1966-08-10 |
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