US1795065A - Ingot mold - Google Patents
Ingot mold Download PDFInfo
- Publication number
- US1795065A US1795065A US373058A US37305829A US1795065A US 1795065 A US1795065 A US 1795065A US 373058 A US373058 A US 373058A US 37305829 A US37305829 A US 37305829A US 1795065 A US1795065 A US 1795065A
- Authority
- US
- United States
- Prior art keywords
- cupola
- iron
- metal
- mold
- ingot mold
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/066—Manufacturing, repairing or reinforcing ingot moulds
- B22D7/068—Manufacturing, repairing or reinforcing ingot moulds characterised by the materials used therefor
Definitions
- Iron ingot molds made by the direct metal process or with iron as it comes in the molten state from the blast furnace have a number of disadvantages.
- the temperature of the molten lIOIl being comparatively low reduces its fluidity, and unless the mold wall is fairly thick, as
- the metal tends to coldheating and cooling in use.
- Lar e graphite flakes render the metal relative y weak as comparedwith metal having small graphite flakes.
- ingot molds made of cupola iron with the sulphur under .05% are highly resistant to cracking even when they have a relatively large sectional area.
- the low sulphur cupola iron ingot molds therefore fail only by the normal process of growth and tire cracking.
- I employ a cupola in which the metal charges are melted.
- a suitable de-sulphurizer such as soda ash is added to the molten metal 1n suflicient quantity to reduce the sulphur content below 05%.
- the de-sul hurized molten metal is then poured into t e ingot mold in the usual manner.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Patented M 3,1931
UNITED sTATEs PATENT. OFFICE EDWARD R. WILLIAMS, 0] LATROBE, PENNSYLVANIA, ASSIGNOR TO VULCAN MOLD AND IRON COMPANY, OF LA'IROBE, PENNSYLVfZNIA, A CORPORATION OF PENN- SYLVANIA meow MOLD 1T0.- Drawing.
Iron ingot molds made by the direct metal process or with iron as it comes in the molten state from the blast furnace have a number of disadvantages. The temperature ofthe molten iron from the time it leaves the blast furnace untilit is poured into the mold he'- comes lower which reduces by precipitation the amount of carbon held in solution. This precipitated carbon or kish promotes porosity in the mold casting, particularl at its top. The temperature of the molten lIOIl being comparatively low reduces its fluidity, and unless the mold wall is fairly thick, as
' four inches or more, the metal tends to coldheating and cooling in use. Lar e graphite flakes render the metal relative y weak as comparedwith metal having small graphite flakes.
By melting pig iron in a cupola or a similar re-melting' medium better physical properties are produced than by the direct metal process. The high melting temperature we vailing in the cupola gives the metal better fluidity than the direct metal from a blast furnace has and therefore gives the casting a smoother surface. The cupola method of producing cast iron affords a better control of the melting temperature than is obtainable by the direct metal method, owing to the ease of manipulating the coke ratio in a short eriod of time. Also the cupola method gives better control of the composition of the iron as to the percentage of silicon, phosphorus, carbon and manganese therein. Cupola metal as generally made has a serious disadvantage, particularly when cast as ingot molds of large size. During the melting operation sulphur is absorbed from the fuel to the extent of from .02% to 05%, which pro- Application filed June 22, 1929. Serial No. 373,058.
duces sulphur in the resultant casting of over .05% and sometimes ashigh as 15%, depending on conditions. High sulphur content renders the ingot molds red-short which, if the mold wall has insuflicient structural strength, allows it to crack. Suflicient strucv tural strength is produced only by having the mold wall thicker than is necessary to properly absorb the heat. from the solidifying lngot.
I have discovered that ingot molds made of cupola iron with the sulphur under .05% are highly resistant to cracking even when they have a relatively large sectional area. The low sulphur cupola iron ingot molds therefore fail only by the normal process of growth and tire cracking.
In the preferable practice of my invention I employ a cupola in which the metal charges are melted. A suitable de-sulphurizer such as soda ash is added to the molten metal 1n suflicient quantity to reduce the sulphur content below 05%. The de-sul hurized molten metal is then poured into t e ingot mold in the usual manner.
I claim:
An ingot mold made of cupola cast iron which contains sulphur under .05% and has high resistance to cracking through sudden expansion.
In testimony whereof, I hereunto afiix my signature. Y EDWARD R. WILLIAMS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US373058A US1795065A (en) | 1929-06-22 | 1929-06-22 | Ingot mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US373058A US1795065A (en) | 1929-06-22 | 1929-06-22 | Ingot mold |
Publications (1)
Publication Number | Publication Date |
---|---|
US1795065A true US1795065A (en) | 1931-03-03 |
Family
ID=23470733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US373058A Expired - Lifetime US1795065A (en) | 1929-06-22 | 1929-06-22 | Ingot mold |
Country Status (1)
Country | Link |
---|---|
US (1) | US1795065A (en) |
-
1929
- 1929-06-22 US US373058A patent/US1795065A/en not_active Expired - Lifetime
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