US1140568A - Process of hardening iron. - Google Patents
Process of hardening iron. Download PDFInfo
- Publication number
- US1140568A US1140568A US2175715A US2175715A US1140568A US 1140568 A US1140568 A US 1140568A US 2175715 A US2175715 A US 2175715A US 2175715 A US2175715 A US 2175715A US 1140568 A US1140568 A US 1140568A
- Authority
- US
- United States
- Prior art keywords
- iron
- salt
- vat
- heating
- heated
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/44—Methods of heating in heat-treatment baths
- C21D1/46—Salt baths
Definitions
- My process consists in forming the iron article into the proper shape, heating'it to a white heat and then immersing it when thus heated into a vat of boiling sodium chlorid or common salt.
- this salt place in a suitable receptacle any kind of common commercial salt and heat it to a boiling point, with the addition of a small amount of water if found desirable; the amount of water to be used should be as small as possible, it not being for the purpose of dissolving the salt, but for preventing adhesion or sticking of the saltto the bottom of the receptacle. If the salt be fine it may actually fuse or melt, but if the salt be coarse it may not actually melt.
- the receptacle may be heated by any suitable means.
- a fire may be placed beneath it, electrical heating means may be used or the heating may be done by steam injected directly into the mass of salt ⁇ if thus heated by steam there is nonecessity of adding water to the salt, since the proper amount of moisture is furnished by the steam.
- the vat of salt is prepared and heated to the proper point, the iron article to be treated is immersed therein and the article is kept in the boiling salt for a few minutes. The time may be five minutes more or less; it is in any event short, but it depends to a great extent upon the thickness of the article.
- the iron Specification of Letters Patent When removed from the vat and cooled, the iron Specification of Letters Patent.
- the metal may also be applied to copper or other metals, although the result is not the same: that is, the metal will not be hardened in the case of copper or other metals allied to it; it should be scoured after treatment and will not tarnish as readily as before; with the metals the result will be varied depending upon the particular metal; furthermore articles of metal other than iron can not so highly be heated as iron, the temperature being dependent upon the particular metal.
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)
- Heat Treatment Of Articles (AREA)
- Adornments (AREA)
Description
PROCESS OF HARDENING IRON.
No Drawing. J
Application fiiea'a ru 16,
To all whom it may concern:
.Be it known that I, SA-NTIAGO Lois BROWN, subject of the Emperor of Austria- Hungary, and having declared my intention of becoming a citizen of the United States, residing at New York, N. Y., have invented a new and useful Process of Hardening Iron or in Heating Iron t0 Render it Equal in Hardness to Steel, of which the following is a full, clear, and exact description.
My process consists in forming the iron article into the proper shape, heating'it to a white heat and then immersing it when thus heated into a vat of boiling sodium chlorid or common salt. In preparing this salt place in a suitable receptacle any kind of common commercial salt and heat it to a boiling point, with the addition of a small amount of water if found desirable; the amount of water to be used should be as small as possible, it not being for the purpose of dissolving the salt, but for preventing adhesion or sticking of the saltto the bottom of the receptacle. If the salt be fine it may actually fuse or melt, but if the salt be coarse it may not actually melt.
The receptacle may be heated by any suitable means. A fire may be placed beneath it, electrical heating means may be used or the heating may be done by steam injected directly into the mass of salt {if thus heated by steam there is nonecessity of adding water to the salt, since the proper amount of moisture is furnished by the steam. When the vat of salt is prepared and heated to the proper point, the iron article to be treated is immersed therein and the article is kept in the boiling salt for a few minutes. The time may be five minutes more or less; it is in any event short, but it depends to a great extent upon the thickness of the article. When removed from the vat and cooled, the iron Specification of Letters Patent.
Patented May 25, 1915.
1915. Serial No. 21,757.
may also be applied to copper or other metals, although the result is not the same: that is, the metal will not be hardened in the case of copper or other metals allied to it; it should be scoured after treatment and will not tarnish as readily as before; with the metals the result will be varied depending upon the particular metal; furthermore articles of metal other than iron can not so highly be heated as iron, the temperature being dependent upon the particular metal.
Having thus described my process what I claim is. f
1. The process of. hardening iron which consists-in heating the iron and then immersing the same when heated into a vat of boiling salt (sodium chlorid).
2. The process of hardening iron which consists in heating the iron to a white heat and then immersing the same into a vat of boiling sodium chlorid (common salt). 3. The process of hardening iron which -consists in heating the iron to a white heat and then immersing it into a vat of'boiling salt, (sodium chlorid) retaining the iron in said vat for a short period of time.
l. The process of treating metals which consists in heating the metal and then im-. 1
mersing it when heated into a vat of boiling sodium chlorid.
In testimony whereof I apply my signature.
SANTIAGO "LUIS BROWN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2175715A US1140568A (en) | 1915-04-16 | 1915-04-16 | Process of hardening iron. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2175715A US1140568A (en) | 1915-04-16 | 1915-04-16 | Process of hardening iron. |
Publications (1)
Publication Number | Publication Date |
---|---|
US1140568A true US1140568A (en) | 1915-05-25 |
Family
ID=3208664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US2175715A Expired - Lifetime US1140568A (en) | 1915-04-16 | 1915-04-16 | Process of hardening iron. |
Country Status (1)
Country | Link |
---|---|
US (1) | US1140568A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2537830A (en) * | 1944-09-14 | 1951-01-09 | Artemas F Holden | Self-agitating metallurgical salt bath |
US2778723A (en) * | 1953-01-30 | 1957-01-22 | Toshio Yoshida | Method for eliminating the explosive reaction in a thermit process |
-
1915
- 1915-04-16 US US2175715A patent/US1140568A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2537830A (en) * | 1944-09-14 | 1951-01-09 | Artemas F Holden | Self-agitating metallurgical salt bath |
US2778723A (en) * | 1953-01-30 | 1957-01-22 | Toshio Yoshida | Method for eliminating the explosive reaction in a thermit process |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1334092A (en) | Method of preparing metal to be galvanized or coated | |
US1140568A (en) | Process of hardening iron. | |
US1247086A (en) | Method of coating metallic articles to prevent oxidation. | |
US865700A (en) | Pickling process. | |
US2173218A (en) | Method for whetting files, rasps, and the like | |
US1719365A (en) | Tarnish-resisting silver and silver plate and processes for producing the same | |
GB822059A (en) | Method of treating articles of aluminium or aluminium alloy for producing surfaces with a mirror-like lustre | |
US1638273A (en) | Method and composition of matter for surface-treating aluminum | |
US716371A (en) | Process of finishing artificial stone. | |
US1677667A (en) | Treatment of magnesium and magnesium alloys to inhibit corrosion | |
US1759762A (en) | Removing incrustation formed on metallic surfaces | |
US1970268A (en) | Method and means for bright finishing metals | |
US2081449A (en) | Solution for treating the surface of steel or iron for the application of paint | |
US2575427A (en) | Treatment of metalworking tools | |
US1169397A (en) | Process for the oxidation of smooth iron surfaces. | |
US1997005A (en) | Method of preparing and nitriding a ferrous article | |
US690963A (en) | Process of preparing solutions for the treatment of steel. | |
USRE1883E (en) | Louis paul angenabd | |
US2304451A (en) | Quenching bath and method of quenching metal | |
US1894752A (en) | Method of treating gray cast-iron and malleable iron | |
US1997006A (en) | Method of preparing and nitriding a ferrous article | |
US1968922A (en) | Process of coating | |
US899062A (en) | Process of treating and preserving metal patterns from corrosion. | |
US1079453A (en) | Process for the treatment of iron and steel to form a permanent black finish thereon. | |
US607625A (en) | William f |