US1520254A - Lead alloy and process for making same - Google Patents

Lead alloy and process for making same Download PDF

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Publication number
US1520254A
US1520254A US596144A US59614422A US1520254A US 1520254 A US1520254 A US 1520254A US 596144 A US596144 A US 596144A US 59614422 A US59614422 A US 59614422A US 1520254 A US1520254 A US 1520254A
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bath
lead
chlorid
calcium
strontium
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US596144A
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Mathesius Walther
Mathesius Hans
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C11/00—Alloys based on lead
    • C22C11/02—Alloys based on lead with an alkali or an alkaline earth metal as the next major constituent

Definitions

  • Our invention relates to improvements in lead alloys and the process of making the same, and more particularly in lead alloys containing an alkaline earth metal and suitable for use as a bearing metal, the alkaline earth metal having the function of hardening the alloy.
  • metallic calcium and barium are caused to combine with lead, by covering a bath of molten lead with a layer of the molten chlorides of the said metals, and intaoducing metallic sodium into the bath of According to the ratio ofthe said salts contained in the layer of chlorids different amounts of calcium and barium are reduced and passed into the lead bath.
  • this process can not be used for reducing chlorid of strontium by sodium and thus passing metallic strontium-into the bath of lead.
  • a lead alloy containing calcium, barium, and strontium Q at approximately any desired-ratio can be 40 made, if at first a salt calcium is put on the lead bath and the chlorid is reduced by the addition of sodium so as to produce a lead alloy which mainly contains calcium as a hardening agent and a residue of sodium.
  • chlorids containedin the layer the sodium being almost entirely separated from the and also a part of the calcium being replaced by metallic strontium and barium.
  • an alloy which contains all of the three alkaline earth metals, the amount of the individual metals depending on the amount of the chlorids and sodium applied to the bath.
  • alloys can be made which con- 'tain 2 per cent of calcium, 1 per cent of strontium, and 1 per cent. of barium.
  • Such alloys are particularly suitable for use as lead bearing metals, because, by the combined action of the said alkaline earth metals, the lower melting point of the alloy is substantially the same and at about 290 centigrade, even if the ratio of the said metals is different, and because, when moderately heated above the said temperature, the alloy gives a very fluent molten solution.
  • the herein described process which consists in first applying a surface layer of a molten salt containing chlorid of calcium to a bath of molten lead, adding metallic sodium to the bath, permitting reaction until the bath contains calcium and sodium, removing the surface layer, and applying to the bath a surface layer containing chlorid of strontium.
  • the herein described process which consists in first applying a surface layer of a molten salt containing chlorid of calcium toa bath of molten lead, adding an alkali metal to the bath, permitting reaction until 100 of strontium and chlorid of 6.
  • a shaft bearing formed of the herein described alloy consisting essentially of lead with about 2% of calcium; and about 2% of other alkaline earth metal.

Description

Patented Dec. 23, .1934.
UNITED STATES PATENT OFFICE.
WALTHEB MATHESIUS AND HANS MATHESIUS, F GHARLOTTENBUBG, NEAR- BERLIN,
' GERMANY.
LEAD ALLOY AND PROCESS FOR MAKING SAME.
Ho Drawing.
To all whom it may concern:
Be it known that we, WALTHER MATHESIUS, professor and engineer, and HANS MATHE- srUs, engineer, citizens of Germany, residing at Charlottenburg, near Berlin, Germany, 17 2, Berliner Strasse, have invented certain new and useful Improvements in Lead Alloys and Processes of Making Same, for which we have filed applications for patent in the followin countries-viz: Germany, Aug. 24, 1921; reat Britain, Aug. 24, 1922; Belgium, August 24, 1922; Switzerland, August 23, 1922; France, September 27, 1922, and Norway, September 20, 1922, and
of which the following is a specification.
Our invention relates to improvements in lead alloys and the process of making the same, and more particularly in lead alloys containing an alkaline earth metal and suitable for use as a bearing metal, the alkaline earth metal having the function of hardening the alloy. In the manufacture of alloys of this kind, metallic calcium and barium are caused to combine with lead, by covering a bath of molten lead with a layer of the molten chlorides of the said metals, and intaoducing metallic sodium into the bath of According to the ratio ofthe said salts contained in the layer of chlorids different amounts of calcium and barium are reduced and passed into the lead bath. However, this process can not be used for reducing chlorid of strontium by sodium and thus passing metallic strontium-into the bath of lead.
Ex riments have shown that a lead alloy containing calcium, barium, and strontium Q at approximately any desired-ratio can be 40 made, if at first a salt calcium is put on the lead bath and the chlorid is reduced by the addition of sodium so as to produce a lead alloy which mainly contains calcium as a hardening agent and a residue of sodium.
If now the first layer of chlorid is removed and in lieu thereof a layer of chlorid of strontium and chlorid of barium is :pplied to the bath, the metals are exchang ina degree corresponding to the ratio of the alloy,
layer of chlorid of- Application filed October 21, 1922. Serial No. 596,144.
chlorids containedin the layer, the sodium being almost entirely separated from the and also a part of the calcium being replaced by metallic strontium and barium. Thereby an alloy is obtained which contains all of the three alkaline earth metals, the amount of the individual metals depending on the amount of the chlorids and sodium applied to the bath. For example, by the said process alloys can be made which con- 'tain 2 per cent of calcium, 1 per cent of strontium, and 1 per cent. of barium. Such alloys are particularly suitable for use as lead bearing metals, because, by the combined action of the said alkaline earth metals, the lower melting point of the alloy is substantially the same and at about 290 centigrade, even if the ratio of the said metals is different, and because, when moderately heated above the said temperature, the alloy gives a very fluent molten solution.
We claim- 1. The herein described process, which consists in applying a fused material containing chlor1d of strontium to a bath'of a molten lead alloy containing calcium and an alkali metal.
2. The herein described process, which consists in applying chlorid of strontium and chlorid of barium to a bath of'a molten lead alloy containing calcium and an alkali 7 metal.
3. The herein described process, which consists in applying chlorid of strontium to a bath of a molten lead alloy containing calcium and sodium.
4. The herein described process, which consists in first applying a surface layer of a molten salt containing chlorid of calcium to a bath of molten lead, adding metallic sodium to the bath, permitting reaction until the bath contains calcium and sodium, removing the surface layer, and applying to the bath a surface layer containing chlorid of strontium.
. 5. The herein described process, which consists in first applying a surface layer of a molten salt containing chlorid of calcium toa bath of molten lead, adding an alkali metal to the bath, permitting reaction until 100 of strontium and chlorid of 6. A shaft bearing formed of the herein described alloy consisting essentially of lead with about 2% of calcium; and about 2% of other alkaline earth metal.
macaw In testimony whereof we afiix our signatures 1n presence of two wltnesses.
WALTHER MATHESIUS. HANS MATHjESIUS. Witnesses:
\ ARTHUR SHROEDER,
Roam T. ANSPEGH.
US596144A 1922-10-21 1922-10-21 Lead alloy and process for making same Expired - Lifetime US1520254A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887416C (en) * 1941-03-18 1953-08-24 Metallgesellschaft Ag Lead-bearing metal
US4170470A (en) * 1976-02-18 1979-10-09 Globe-Union Inc. High strength lead alloy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887416C (en) * 1941-03-18 1953-08-24 Metallgesellschaft Ag Lead-bearing metal
US4170470A (en) * 1976-02-18 1979-10-09 Globe-Union Inc. High strength lead alloy

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