US2606112A - Grey cast iron containing graphite in spherulitic form - Google Patents
Grey cast iron containing graphite in spherulitic form Download PDFInfo
- Publication number
- US2606112A US2606112A US229660A US22966051A US2606112A US 2606112 A US2606112 A US 2606112A US 229660 A US229660 A US 229660A US 22966051 A US22966051 A US 22966051A US 2606112 A US2606112 A US 2606112A
- Authority
- US
- United States
- Prior art keywords
- magnesium
- nitrogen
- cast iron
- grey cast
- containing graphite
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title description 4
- 229910001060 Gray iron Inorganic materials 0.000 title description 4
- 229910002804 graphite Inorganic materials 0.000 title description 2
- 239000010439 graphite Substances 0.000 title description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 30
- 229910052757 nitrogen Inorganic materials 0.000 description 16
- 239000011777 magnesium Substances 0.000 description 10
- 229910052749 magnesium Inorganic materials 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910001141 Ductile iron Inorganic materials 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- ATTFYOXEMHAYAX-UHFFFAOYSA-N magnesium nickel Chemical compound [Mg].[Ni] ATTFYOXEMHAYAX-UHFFFAOYSA-N 0.000 description 4
- -1 magnesium nitride Chemical class 0.000 description 4
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 description 3
- 235000000396 iron Nutrition 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- MVXMNHYVCLMLDD-UHFFFAOYSA-N 4-methoxynaphthalene-1-carbaldehyde Chemical compound C1=CC=C2C(OC)=CC=C(C=O)C2=C1 MVXMNHYVCLMLDD-UHFFFAOYSA-N 0.000 description 1
- OWXLRKWPEIAGAT-UHFFFAOYSA-N [Mg].[Cu] Chemical compound [Mg].[Cu] OWXLRKWPEIAGAT-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- FKWSMBAMOQCVPV-UHFFFAOYSA-N magnesium dicyanide Chemical compound [Mg+2].N#[C-].N#[C-] FKWSMBAMOQCVPV-UHFFFAOYSA-N 0.000 description 1
- GOKQBRXJUKTYSC-UHFFFAOYSA-N magnesium;azanidylidenemethylideneazanide Chemical compound [Mg+2].[N-]=C=[N-] GOKQBRXJUKTYSC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
Definitions
- My invention relates to the manufacture of nodular iron.
- I then made a series of nodular irons employing magnesium-nickel and magnesium-silicon as addition agents. After having taken samples of each batch of molten metal, I lifted the nitrogen content of th molten metal, whereupon I took an additional series of samples. In comparing the low-nitrogen with the high-nitrogen samples, I
- the magnesium and nitrogen may be added to the molten metal with the addition agents: magnesium nitride, magnesium cyanide, or magnesium cyanamide.
- the magnesium may be added separately by means of the addition agents: magnesium-nickel, magnesium-copper, magnesiumsilicon, or magnesium, and the nitrogen may be added by means of calcium cyanamide, air, nitrogen, or other compounds of nitrogen.
- Other addition agents for adding magnesium and/ or nitrogen will occur to those skilled in the art.
- nodular iron does not accurately describe this new material, for it is not the iron that is nodular.
- Others have described this material as grey cast iron having uncombined carbon in a spherulitic form, and, in view of the fact that this more concisely describes the material, I employ it in my claim to identify and describe the nodular iron of my specification.
- Magnesium-bearing grey cast iron having uncombined carbon in sp-herulitic form and containing 0.0l00.20% nitrogen.
Description
Patented Aug. 5, 1952 GREY CAST IRON CONTAINING GRAPHITE IN SPHERULITIC FOR-M- .Iames Fernando Jordan, Huntington Park, Calif.
No Drawing. Application June 2, 1951, Serial No. 229,660
1 Claim. 1
My invention relates to the manufacture of nodular iron.
During the course of certain experiments regarding methods of adding magnesium to molten iron, I noticed that certain of the resulting samples of nodular iron were tougher than I had anticipated. Analysis of these tough samples for the conventional elements showed nothing that seemed to explain the toughness. While it was noted that most of the tough samples were made with the addition agent, magnesium nitride, certain samples of iron made with magnesiummicizel and magnesium-silicon also exhibited this tough characteristic.
It then occurred to me that the nitrogen content of the metal might have a bearing on the toughness of nodular iron, and analysis of the various samples for nitrogen showed that the tough samples all contained a relatively high percentage of nitrogen.
As I say, this desirabl tough characteristic appeared in only a few of the samples made with magnesium-nickel and magnesium-silicon, and it appeared in all of the samples made with magnesium nitride. The question then arose regarding the possibility of assuring the toughness in the magnesium-nickel/magnesium-silicon type of irons by lifting the nitrogen content of such irons.
I then made a series of nodular irons employing magnesium-nickel and magnesium-silicon as addition agents. After having taken samples of each batch of molten metal, I lifted the nitrogen content of th molten metal, whereupon I took an additional series of samples. In comparing the low-nitrogen with the high-nitrogen samples, I
found that the toughness of the metal was always increased when nitrogen was added.
I found that nitrogen values below 0.010% seemed to contribute little towards improving the toughness of the metal, and I found that nitrogen values in the range between 0.010 and 0.20%
substantially improved the toughness of the metal.
The magnesium and nitrogen may be added to the molten metal with the addition agents: magnesium nitride, magnesium cyanide, or magnesium cyanamide. Or the magnesium may be added separately by means of the addition agents: magnesium-nickel, magnesium-copper, magnesiumsilicon, or magnesium, and the nitrogen may be added by means of calcium cyanamide, air, nitrogen, or other compounds of nitrogen. Other addition agents for adding magnesium and/ or nitrogen will occur to those skilled in the art.
While I have herein employed the widely-accepted practice of referring to magnesium-bearing iron as nodular iron, the expression nodular iron does not accurately describe this new material, for it is not the iron that is nodular. Others have described this material as grey cast iron having uncombined carbon in a spherulitic form, and, in view of the fact that this more concisely describes the material, I employ it in my claim to identify and describe the nodular iron of my specification.
Having now described several forms of my in vention, I wish it to be understood that my invention is not to be limited to the specific forms or arrangement of steps hereinbefore disclosed, ex-
cept insofar as such limitations are specified in the appended claim.
I claim as my invention:
Magnesium-bearing grey cast iron having uncombined carbon in sp-herulitic form and containing 0.0l00.20% nitrogen.
JAMES FERNANDO JORDAN.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,335,370 Ellis Mar. 30, 1920 1,920,934 Keen Aug. 1, 1933
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US229660A US2606112A (en) | 1951-06-02 | 1951-06-02 | Grey cast iron containing graphite in spherulitic form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US229660A US2606112A (en) | 1951-06-02 | 1951-06-02 | Grey cast iron containing graphite in spherulitic form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2606112A true US2606112A (en) | 1952-08-05 |
Family
ID=22862182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US229660A Expired - Lifetime US2606112A (en) | 1951-06-02 | 1951-06-02 | Grey cast iron containing graphite in spherulitic form |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2606112A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2757082A (en) * | 1952-03-31 | 1956-07-31 | Int Nickel Co | Method for producing magnesium containing cast iron |
| US2794731A (en) * | 1954-07-21 | 1957-06-04 | Res Inst | Method of reducing refining of cast irons and steels |
| US2894834A (en) * | 1952-08-13 | 1959-07-14 | Nova Cast Inc | Method for producing ferrous metal castings |
| US3393996A (en) * | 1965-11-29 | 1968-07-23 | Dow Chemical Co | Treating agent for ferrous metals |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1335370A (en) * | 1917-10-09 | 1920-03-30 | Ellis Foster Co | Desulfurizing cast-iron |
| US1920934A (en) * | 1928-07-10 | 1933-08-01 | Chas W Guttzeit | Corrosion resisting steel |
-
1951
- 1951-06-02 US US229660A patent/US2606112A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1335370A (en) * | 1917-10-09 | 1920-03-30 | Ellis Foster Co | Desulfurizing cast-iron |
| US1920934A (en) * | 1928-07-10 | 1933-08-01 | Chas W Guttzeit | Corrosion resisting steel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2757082A (en) * | 1952-03-31 | 1956-07-31 | Int Nickel Co | Method for producing magnesium containing cast iron |
| US2894834A (en) * | 1952-08-13 | 1959-07-14 | Nova Cast Inc | Method for producing ferrous metal castings |
| US2794731A (en) * | 1954-07-21 | 1957-06-04 | Res Inst | Method of reducing refining of cast irons and steels |
| US3393996A (en) * | 1965-11-29 | 1968-07-23 | Dow Chemical Co | Treating agent for ferrous metals |
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