US552546A - Method of hardening cast-steel - Google Patents
Method of hardening cast-steel Download PDFInfo
- Publication number
- US552546A US552546A US552546DA US552546A US 552546 A US552546 A US 552546A US 552546D A US552546D A US 552546DA US 552546 A US552546 A US 552546A
- Authority
- US
- United States
- Prior art keywords
- hardening
- steel
- casting
- oil
- water
- 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
- 229910001208 Crucible steel Inorganic materials 0.000 title description 10
- 238000005266 casting Methods 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 8
- 229940072033 potash Drugs 0.000 description 8
- 235000015320 potassium carbonate Nutrition 0.000 description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 8
- 240000002799 Prunus avium Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 235000019693 cherries Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
Images
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/16—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for explosive shells
Definitions
- rlhis invention relates to methods of hardening cast-steel, and it has for its object to provide an improved method of this character that will positively insure the homogeneous hardening or toughening of cast-steel, while at the same time providing for an eXtra hardening of any particular part or parts of ,the casting requiring' great strength and a hard wearingsurface.
- the main and primary object of the present invention is to provide a simple and efficient method adapted to be employed for hardening steel castings of all kinds, but which will be especially adapted for hardening the wearing-surfaces of the rack-plate castings for rolling supports for balanced slide-valves, such as set forth in patent numbered 404,363, granted to me May 28, 1889.
- l designates a tank or tub of any suitable size or capacity, and said tub is adapted to contain a hardening bath composed of separate strata of water and oil. Owing to the lightness of the oil the strat-a thereof is necessarily above the strata of water, and to insure a proper hardening of the castings introduced into the combined bath an equal depth of water and of oil is usually observed. Before introducing the casting to be hardened into the combined hardening bath of oil and water the casting, whatever may be its character, is first heated to a cherry-red heat with prussiate of potash applied to the surface or surfaces of the casting requiring a greater hardening than the body of the casting.
- An improvement in the method of hardening cast steel which consists in applying a coating of prussiate of potash to the surface of the casting to be hardened, heating the cast ⁇ ing with the prussiate of potash thereon to a cherry red heat, and then immediately plunging the heated casting through a bath of oil into a sub-adjacent bath of water without intermediate exposure, substantially as set forth.
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- 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)
- Heat Treatment Of Articles (AREA)
Description
(No Model.)
W. T. REASER.
' METHOD "F-HARDENING GAST STEEL. l No. 552,546. l Patented Jan. 7, 1896.
` Il a e; zsmg. *-W i ,m 1: -Zofah i E n 0 a/' f :sin
Nrrnn STATES i ATENT rricn.
METHOD lOF HARDENING CAST-STEEL.
SPECIFICATION forming part of Letters Patent No. 552,546, dated January 7, 1896.
Application filed November 30, 1894. Serial N0. 530,449. (No specimens.)
To all whom t nza/y concern:
Beit known that I, WARREN T. REASER, a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented a new and useful Method of Hardening OastSteel, of which the following is a speciiication.
rlhis invention relates to methods of hardening cast-steel, and it has for its object to provide an improved method of this character that will positively insure the homogeneous hardening or toughening of cast-steel, while at the same time providing for an eXtra hardening of any particular part or parts of ,the casting requiring' great strength and a hard wearingsurface.
To this end the main and primary object of the present invention is to provide a simple and efficient method adapted to be employed for hardening steel castings of all kinds, but which will be especially adapted for hardening the wearing-surfaces of the rack-plate castings for rolling supports for balanced slide-valves, such as set forth in patent numbered 404,363, granted to me May 28, 1889.
In the carrying out of my improved method no special apparatus is necessary; but in the accompanying drawing the iigure is a sectional view of a tank or tub in connection with which the method isl usually carried out.
Referring to the drawing, l designates a tank or tub of any suitable size or capacity, and said tub is adapted to contain a hardening bath composed of separate strata of water and oil. Owing to the lightness of the oil the strat-a thereof is necessarily above the strata of water, and to insure a proper hardening of the castings introduced into the combined bath an equal depth of water and of oil is usually observed. Before introducing the casting to be hardened into the combined hardening bath of oil and water the casting, whatever may be its character, is first heated to a cherry-red heat with prussiate of potash applied to the surface or surfaces of the casting requiring a greater hardening than the body of the casting. When the casting having the prussiate of potash thereon has been heated to the desired temperature, the same is then instantly plunged down into the combined bath, passing successively through the strata of oil into the strata of water. By reason of having the combined bath of oil and water placed in a single tank or tub it will be noted that the heated casting is passed successively into the bath of oil and of water without intermediate exposure, and the casting in the process of cooling is therefore given the desired hardening and tempering by the combined action of the oil and water, both of which are desirable hardening agents.
Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is
An improvement in the method of hardening cast steel which consists in applying a coating of prussiate of potash to the surface of the casting to be hardened, heating the cast` ing with the prussiate of potash thereon to a cherry red heat, and then immediately plunging the heated casting through a bath of oil into a sub-adjacent bath of water without intermediate exposure, substantially as set forth.
In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses. v
' WARREN T. REASER. Witnesses:
JOHN H SIeeERs, G. C. SHOEMAKER.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US552546A true US552546A (en) | 1896-01-07 |
Family
ID=2621287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US552546D Expired - Lifetime US552546A (en) | Method of hardening cast-steel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US552546A (en) |
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0
- US US552546D patent/US552546A/en not_active Expired - Lifetime
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