US2804414A - Chill iron alloy castings - Google Patents
Chill iron alloy castings Download PDFInfo
- Publication number
- US2804414A US2804414A US473742A US47374254A US2804414A US 2804414 A US2804414 A US 2804414A US 473742 A US473742 A US 473742A US 47374254 A US47374254 A US 47374254A US 2804414 A US2804414 A US 2804414A
- Authority
- US
- United States
- Prior art keywords
- iron
- chilled
- iron alloy
- chill
- castings
- 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
- 238000005266 casting Methods 0.000 title description 19
- 229910000640 Fe alloy Inorganic materials 0.000 title description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910001037 White iron Inorganic materials 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910001060 Gray iron Inorganic materials 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910000968 Chilled casting Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000011733 molybdenum Substances 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000003599 detergent Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 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 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting 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
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
' CHILL moN ALLOY CASTINGS Paul W. Moss and George W. Moss, Saginaw, Mich., as-
signors to Eaton Manufacturing Company, Cleveland, Ohio, a corporation of Ghio No Drawing. Application December 7, 1954, Serial No. 473,742
4 Claims. (Cl. 14831) This invention relates to castings and more particularly to chill cast iron alloy castings, having a part of the casting, adapted for Wear, made of chilled iron.
Broadly the invention comprehends the production of cast articles formed by casting specific iron alloy analysis compositions against'chill plates to form castings having extreme hardness and abrasive wear resistant surfaces in the white chilled portion thereof and gray iron adjacent the chilled portion.
Internal combustion engine valve tappets and like articles having surfaces thereof subject to abrasive wear have been devised and used commercially over a great period of time but have not been of a metallic composition as chilled at the wear surfaces to provide all that might be desired so as to render said articles practically service free or afford a long life therefor. The invention as herein set forth makes use of a specific iron alloy analysis such that in the use thereof in producing a chilled white iron casting provides a very hard chilled surface having high abrasive wear resistance and which will not spall or fatigue in present day engines in conjunction with present day detergent oils used therein. It is thus the basic object of this invention to provide an article of specific iron alloy analysis at least a portion of which is cast against a chill plate to produce a reasonably inexpensive article capable of having its chilled surface withstand abrasive wear.
The presently devised chilled iron alloy casting is intended primarily for engine valve tappet structures wherein one end or head surface thereof is subject to abrasive wear by reason of engagement of the engine cam against said surface in the actuation of said tappet against spring pressure imposed upon said tappet. In so utilizing an iron alloy of specific analysis together with the chill casting of at least a portion of a specific article therefrom, an article having a chilled surface of very good wear characteristics is achieved. It is conceivable that such an article could take any of various shapes aside from tappets if like surfaces are des'ired subject to impact or heavy pressure.
The composition so utilized in carrying out this invention, that of a chilled casting of iron, is characterized by its strength, hardness and toughness, properties desired in parts subject to wear and containing the following:
Percent Silicon 2.40-3.05 Manganese .70-1.10 Carbon 3.20-3.65 Molybdenum .50-1.00 Chromium .20-1.00 Nickel 1.20-2.00
Phosphorus and sulphur may be present within the ranges usually found in cast iron.
For use in the production of engine valve tappets having a head the surface of which is subjected to abrasive States Patent F Patented Aug. 27, 1957 wear, good resultshave been obtained with a composition containing approximately the following:
I Percent Silicon 2.70 Manganese .80 Carbon 3.50 Molybdenum .60 Chromium .70 Nickel 1.60
Impurities of phosphorus and sulphur Phosphorus and sulphur may be present within the ranges usually found in cast iron.
Such a composition, if chill cast, will produce a white iron having a Rockwell C hardness 55 minimum as compared With ordinary chilled iron.
The present iron alloy composition is not only extremely hard and abrasive wear resistant in the chilled condition but it is strong and tough both in the chilled condition and gray iron condition. Thus this composition is characteristically suitable for chilled castings subjected to heavy pressure or impact, since such castings are less liable to breakage than ordinary chilled iron castings.
In the production of tappet castings according to this invention the iron is first melted in an electric arc furnace and the chill depth adjusted to suit the purpose. Chill depth control is effected by varying the amount of chromium added and by the addition of graphitizers such as carbon and silicon. After melting the iron it is poured into appropriate shaped molds, preferably green sand molds at a temperature in excess of about 2500 F. The sand molds as such prior to the pouring of the molten iron thereinto are supported upon chill plates to effect the desired local chilling on the head surface of the tappets. Although green sand molds are preferred it is conceivable that dry sand molds as well as shell molds could likewise be used. Subsequent to the casting of the rough tappets they are machined and ground as required to finish size and condition ready for engine installation.
While this invention has been directed primarily to the production of chilled iron alloy castings for use as engine tappets, it is readily conceivable of use of said castings in the production of articles to be subjected to like impact and heavy pressure use in or out of contact with presently developed and used detergent oils and ac- V cordingly, the appended claims are so directed basically to chilled iron alloy castings of specific metallic analysis.
What we claim is: v
1. A chilled casting, a portion of which is of chilled White iron and the remainder of which is gray iron, containing silicon 2.40 to 3.05%, manganese .70 to 1.10%, carbon 3.20 to 3.65%, molybdenum .50 to 1.00%, chromium .20 to 1.00%, nickel 1.20 to 2.00% and the balance substantially all iron.
2. A chilled casting according to claim 1 wherein the casting is in the form of an engine tappet, the head of which is subject to detergent oils under impact and heavy loading in operational use, said head being the chilled white iron portion of the casting.
3. A cast engine tappet comprising a body portion and a head portion, said tappet containing by percent, silicon 2.40 to 3.05, manganese .70 to 1.10, carbon 3.20 to 3.65, molybdenum .50 to 1.00, chromium .20 to 1.00, nickel 1.20 to 2.00 and the balance substantially all iron, said head portion being of chilled white iron and said body portion being of gray iron, whereby said head is highly resistant to corrosive fatiguing.
' 3 4 4. A cast engine tappet comprising a body portion References Cited in the file of this patent and a head portion, said tappet consisting substantially of UNITED STATES PATENTS 3.50% carbon, .80% manganese, 2.70% silicon, 1.60% nickel, .70% chromium, .60% molybdenum and the hell Z; l i 5 yet ug. 0, 9 balance substantially all 1IO11, said head portion being of chilled White iron and said body portion being of gray OTHER REFERENCES iron, whereby said head is highly resistant to corrosive Alloy Cast Iron Handbook, 2nd edition, pages 262-263.
fatiguing. Published in 1944 by the American Foundrymens Assn.
Claims (1)
1. A CHILLED CASTING, A PORTION OFWHICH IS OF CHILLED WHITE IRON AND THE REMAINDER OF WHICH IS GRAY IRON, CONTAINING SILICON 2.40 TO 3.05%, MANGANESE .70 TO 1.10%, CARBON 3.20 TO 3.65%. MOLYDBENUM .50 TO 1.00%, CHROMIUM .20 TO 1.00%, NICKEL 1.20 TO 2.00% AND THE BALANCE SUBSTANTIALLY ALL IRON.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US473742A US2804414A (en) | 1954-12-07 | 1954-12-07 | Chill iron alloy castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US473742A US2804414A (en) | 1954-12-07 | 1954-12-07 | Chill iron alloy castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2804414A true US2804414A (en) | 1957-08-27 |
Family
ID=23880790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US473742A Expired - Lifetime US2804414A (en) | 1954-12-07 | 1954-12-07 | Chill iron alloy castings |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2804414A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3370934A (en) * | 1967-06-05 | 1968-02-27 | Ball Brothers Co Inc | Iron alloy |
| US4396442A (en) * | 1981-05-15 | 1983-08-02 | Kubota Ltd. | Ductile cast iron roll and a manufacturing method thereof |
| US5442144A (en) * | 1993-08-26 | 1995-08-15 | International Business Machines Corporation | Multilayered circuit board |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1910034A (en) * | 1930-01-08 | 1933-05-23 | Bonney Floyd Co | Pearlitic cast iron and method of producing the same |
| US2326730A (en) * | 1939-09-18 | 1943-08-10 | John F Kelly | Mold and method of making the same |
-
1954
- 1954-12-07 US US473742A patent/US2804414A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1910034A (en) * | 1930-01-08 | 1933-05-23 | Bonney Floyd Co | Pearlitic cast iron and method of producing the same |
| US2326730A (en) * | 1939-09-18 | 1943-08-10 | John F Kelly | Mold and method of making the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3370934A (en) * | 1967-06-05 | 1968-02-27 | Ball Brothers Co Inc | Iron alloy |
| US4396442A (en) * | 1981-05-15 | 1983-08-02 | Kubota Ltd. | Ductile cast iron roll and a manufacturing method thereof |
| US5442144A (en) * | 1993-08-26 | 1995-08-15 | International Business Machines Corporation | Multilayered circuit board |
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