US128362A - Improvement in modes of converting cast-iron into steel - Google Patents
Improvement in modes of converting cast-iron into steel Download PDFInfo
- Publication number
- US128362A US128362A US128362DA US128362A US 128362 A US128362 A US 128362A US 128362D A US128362D A US 128362DA US 128362 A US128362 A US 128362A
- Authority
- US
- United States
- Prior art keywords
- steel
- iron
- modes
- improvement
- cast
- 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
- 229910000831 Steel Inorganic materials 0.000 title description 5
- 239000010959 steel Substances 0.000 title description 5
- 229910001018 Cast iron Inorganic materials 0.000 title description 3
- 238000005266 casting Methods 0.000 description 5
- 238000005496 tempering Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000167854 Bourreria succulenta Species 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
- C21D5/04—Heat treatments of cast-iron of white cast-iron
- C21D5/06—Malleabilising
- C21D5/08—Malleabilising with oxidation of carbon
- C21D5/10—Malleabilising with oxidation of carbon in gaseous agents
Definitions
- the tool In the making of edged tools the tool is first cast of iron in any of the usual ways, and then placed in an annealing-furnace. 1t iskept in this furnace about two-thirds of the time it would be kept in order to make it thoroughly malleable-that is, it remains long enough to remove about two-thirds of the carbon from the casting. When this has been done the tool is removed from the annealing-furnace, cleaned, and hammered into shape, (straightened,) and about one-eighth of an inch is out from the entire edge by means of shears or other suitable instrument.
- the tool is now placed into a heating-furnace and heated to a cherry red, and then immersed in water or oil, or other tempering liquids, as is customary in tempering steel.
- water or oil, or other tempering liquids as is customary in tempering steel.
- the object in removing the edge of the tool is to get rid of that portion of the casting which has become too much decarbonized.
- the casting after being removed from the annealing-furnace, has its outer coating or surface (which has been too much decarbonized) removed, and is then cut and tempered as any cast-steel file is.
- the coating to be removed is very thin, not being thicker than a sheet of ordinary wri tin g-paper.
- the eyes of axes or hatchets remain in a malleable state, or soft, and are, consequently, not liable to. break from sudden blows or in bending.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food-Manufacturing Devices (AREA)
Description
' UNITED STATES PATENT OFFICE.
THOMAS CLARK, OF LOUISVILLE, KENTUCKY.
IMPROVEMENT IN MODES OF CONVERTING CAST-IRON INTO STEEL.
Specification forming part of Letters Patent No. 128,362, dated June 25, 1872.
' ulating and tempering, as will be hereinafter described.
In the making of edged tools the tool is first cast of iron in any of the usual ways, and then placed in an annealing-furnace. 1t iskept in this furnace about two-thirds of the time it would be kept in order to make it thoroughly malleable-that is, it remains long enough to remove about two-thirds of the carbon from the casting. When this has been done the tool is removed from the annealing-furnace, cleaned, and hammered into shape, (straightened,) and about one-eighth of an inch is out from the entire edge by means of shears or other suitable instrument. The tool is now placed into a heating-furnace and heated to a cherry red, and then immersed in water or oil, or other tempering liquids, as is customary in tempering steel. When removed it will be found that the carbon which was allowed to remain in the tool has been thoroughly scattered or diffused, and that the partially-malleable casting has been converted into steel. The object in removing the edge of the tool is to get rid of that portion of the casting which has become too much decarbonized. In the manufacture of files, the casting, after being removed from the annealing-furnace, has its outer coating or surface (which has been too much decarbonized) removed, and is then cut and tempered as any cast-steel file is. The coating to be removed is very thin, not being thicker than a sheet of ordinary wri tin g-paper.
In using this process it will readily be seen that only so much of the tool is tempered as is immersed. Thus the handles of files, or
the eyes of axes or hatchets, remain in a malleable state, or soft, and are, consequently, not liable to. break from sudden blows or in bending.
I do not, of course, confine myself to the manufacture of tools from cast-iron, as any casting may be turned wholly or partially into steel in the same manner.
Having thus described my invention, what I claim is The within-described process of converting malleableized cast-iron into steel, substantially as herein set forth.
In testimony that 1 claim the foregoing I have hereunto set my hand.
THOMAS CLARK.
Witnesses:
C. M. ALEXANDER, J. M. MASON.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US128362A true US128362A (en) | 1872-06-25 |
Family
ID=2197781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US128362D Expired - Lifetime US128362A (en) | Improvement in modes of converting cast-iron into steel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US128362A (en) |
-
0
- US US128362D patent/US128362A/en not_active Expired - Lifetime
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