US102550A - Improved process tor tempering steel - Google Patents
Improved process tor tempering steel Download PDFInfo
- Publication number
- US102550A US102550A US102550DA US102550A US 102550 A US102550 A US 102550A US 102550D A US102550D A US 102550DA US 102550 A US102550 A US 102550A
- Authority
- US
- United States
- Prior art keywords
- improved process
- boiler
- tempering steel
- tempering
- steam
- 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
- 238000000034 method Methods 0.000 title description 10
- 238000005496 tempering Methods 0.000 title description 10
- 229910000831 Steel Inorganic materials 0.000 title description 6
- 239000010959 steel Substances 0.000 title description 6
- 229910000760 Hardened steel Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
Definitions
- the nature or essence of my invention consists in tempering or drawing the temper of hardened steel in edge tools and other articles by heating them to the proper point in steam or vapor.
- the boiler proper A has beneath it the usual furnace for applying heat to it, B being the gas orsmokepipe of the same.
- a horizontal grating, I), or perforated platform is placed within the boiler at such ahcight as to be above the water, upon which the. implements, articles, or material to'be tempered is to be placed, the man-hole E affording ready access to the interior for putting in and taking out the articles, or for any other purpose.
- thermometer T which may have that portion of the tube outside the boiler covered with a strong glass tube, or with a metal case having a plate. glassfront, so that the mercury column and scale may be visible, has its bulb within the boiler, so as to be immersed in the steam and to indicate precisely its temperature.
- the temperature of the steel,- which is a good conductor of heat will have risen at about the same rate with the steam, sothat when the latter has reached the proper point the heat may beat once checked, and the temperature allowed to fall. This may be done by opening the furnace doors, letting olf the steam, or by both means, or by any other method that may be found convenient.
- the temperature or degree of heat required for the various sorts of implements, from the lancet to the large and heavy'saw, is well known to skillful workmen, and varies from about 430 to 600 Fahrenheit.
Description
J. JENKINS.
TemperingSteeL- I No. 102,550. Patented May 3,1870.
fit-tilted %tahet JABEZ JENKINS, OF PHILADELPHIA, PENNSYLVANIA.
Letters Patent No. 102,550, dated May 3, 1870.
IMPROVED PROCESS EOR TEMPERING- STEEL.
The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern:
have invented a'new and improved Process for Tempering or Drawing the Temper of Hardened Steel; and I hereby declare the following to be a full and exact description thereof, reference being had to the accompanying drawing forming part ofthis specification.
The nature or essence of my invention consists in tempering or drawing the temper of hardened steel in edge tools and other articles by heating them to the proper point in steam or vapor.
1n the use of my improved process, a steam-boiler of any form and construction that is found convenient and adapted to the purpose may be employed, but it should be made strong enough to bear with safety a pressure of at least sixty atmospheres.
The drawinghereinbefore mentioned shows the principal features of a boiler that may be used for tempering. I
The boiler proper A has beneath it the usual furnace for applying heat to it, B being the gas orsmokepipe of the same.
A horizontal grating, I), or perforated platform is placed within the boiler at such ahcight as to be above the water, upon which the. implements, articles, or material to'be tempered is to be placed, the man-hole E affording ready access to the interior for putting in and taking out the articles, or for any other purpose.
The thermometer T, which may have that portion of the tube outside the boiler covered with a strong glass tube, or with a metal case having a plate. glassfront, so that the mercury column and scale may be visible, has its bulb within the boiler, so as to be immersed in the steam and to indicate precisely its temperature. v
A sufficient-quautity of water having been supplied to the boiler by hose-pipe or otherwise, allowing, if saturated steam be used, which I greatly prefer, about a pint and a half for every cubic foot of boiler space above it, and the articles or material to be tempered having been placed upon the platform D, heat is to be'applied until the temperature of the steam, which will be indicated by the thermometer, has risen to thedegree required for giving the right temper to the articles under treatment. The temperature of the steel,- which is a good conductor of heat, will have risen at about the same rate with the steam, sothat when the latter has reached the proper point the heat may beat once checked, and the temperature allowed to fall. This may be done by opening the furnace doors, letting olf the steam, or by both means, or by any other method that may be found convenient.
The temperature or degree of heat required for the various sorts of implements, from the lancet to the large and heavy'saw, is well known to skillful workmen, and varies from about 430 to 600 Fahrenheit. The tools having been forged and hardened in the usual manner, only those requiring the same temper must be put into the boiler together.
\Vhat I claim, and desire to secure by Letters Patent, is-
The above described process for tempering hardened steel, by surrounding it with steam heated to the tem' perature required.
7 J ABEZ JENKINS.
\Vituesses:
R. \V. CURL, (3. B. Onozrs.
Publications (1)
Publication Number | Publication Date |
---|---|
US102550A true US102550A (en) | 1870-05-03 |
Family
ID=2172034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US102550D Expired - Lifetime US102550A (en) | Improved process tor tempering steel |
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US (1) | US102550A (en) |
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- US US102550D patent/US102550A/en not_active Expired - Lifetime
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