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Publication numberUS2128955 A
Publication typeGrant
Publication dateSep 6, 1938
Filing dateNov 26, 1937
Priority dateNov 26, 1937
Publication numberUS 2128955 A, US 2128955A, US-A-2128955, US2128955 A, US2128955A
InventorsMontgomery Richard B
Original AssigneeAmerican Brass Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hot workable phosphor bronze
US 2128955 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Patented Sept. 6, 1938 HOT WORKABLE PHOSPHOR BRONZE Richard B. Montgomery, Derby, Conn., assignor to The American Brass Company, Waterbury, Conn., a corporation oLConnecticut No Drawing.

This invention relates to copper-tinlalloys, and more particularly to a phosphor bronze, and has for an object to produce such an alloy which is hot workable and has greater strength and hard- 5 ness. 1 \P This application is a continuation in part of my prior application Serial No. 108,616, filed October 31, 1936.

The so-called phosphor bronzes are alloys of 10 copper and tin deqxidized with phosphorus before pouring or casting the molten metal into suitable molds. In order to make sure the metal is properly deoxidized there is usually sufiicient of the .deozidizer used so that there is a small surplus 15 and a small amount of the deo'xidizer remains in the resulting alloy. In the present alloy, however, suificint phosphorus is added not only to-deoxidize the melt but to have some residual phosphorus alloyed with the metal for the purpose of 20 securing definite physical properties.

The tin bronzes may be cold rolled up to about 12 percent tin content. These bronzes as a rule also maybe hot rolled or worked up to about 2 percent tin content, but the hot rolling or hot" 25 working becomes rapidly impossible as the tin content is increased over 2 percent. I I have found that, with an appreciable amount of phosphorus remaining in the alloy and up to about 1 percent, bythe addition of sufflcient,

- worked with a tin content upto 20 percent. Thus a tin bronze that could not be hot rolled at all 35 canbe-easily hot rolled with additions of phosphorus and iron in the ratio of one to four.

This effect is secured in these copper tin alloys with a tin content of from 2 to 20 percent and balance principally copper, the content'of phos-p 4 phorustbeing from 0.05 percent up to about 1 being hot workable.

' percent, and the content of iron from 0.25 percent to about 5 percenti The content of iron for best results should be at least suflicient so that the 1 ratio of phosphorus to iron is about 1 to 4, or suf U ficient to form the compound FezP. Thus in this alloy suflicient phosphorusis added not only to deoxidize the melt, but to have some residual phosphorus alloyed with the metal for the purpose of securing definite physical properties, and suf- 50 ficient iron isaddedto convert the phosphorus into iron phosphide. l h

It appears that the phosphorus in a phosphor Application November 26, 1937, Serial N0. 176,666

4 Claims. 01. 75-154) bronze when iron is present in amount insufficient to form the compound FezP forms a phosphorustin compound which melts below a suitable hot rolling temperature and thereby further increases the hot shortness of the tin bronzes containing 6 more than 2 percent tin, and making it even more diflicult to hot work. However, it appearsthat with iron present in amountsufiicient to convert all, or substantially all, of the phosphorus into iron phosphideFezP no objectionable phosphorus- 10 tin compound is formed, but the-compound of iron and phosphorus is formed instead, which compound melts considerably above the hot rolling temperature. Uponlcooling this copper-tiniron-phosphorus alloy the iron phosphide crystallizes first from the melt. Thus dispersed throughout the liquid metal, these particles appear to control the crystallization of the copper and tin producing a fine grainflstructure. with littletin segregation. Therefore, it is seen that by having phosphorus and iron present in substantially the above mentioned ratio a phosphor bronze of higher tin content may be produced which can be hot rolled or hot forged, and which due to its superior structure possesses greater strength and hardness than the ordinary phosphor bronze.

It will be appreciated a large number of specific alloys may be made within the ranges of elements noted, but an example of an alloy that hot rolls very nicely has approximately the following proportions, tin 5 percent, iron 05 percent, phosphorus'0.1 percent, and balance copper.

An example of another desirable alloy has approximately 10 percent tin, 1 percent iron, 0.2

percent phosphorus, and balance copper. 36

Having thus set forth the nature of my invention, what I claim is: r

1. An alloy composed of 2%v to 20% tin, from 0.25% to 5% iron; phosphorus from 0.05% up to 1% and balance copper, which is characterized by 40 *2. An alloy composed of 2% to 20% tin, from 0.25%to 5% iron, phosphorus from.0.05% upto 1%, and balance copper, and in which the iron content is at least about four times the 'phosphorus content. k

3. An alloy composed of approximately 5% tin, 0.5% iron; 0.1% phosphorus, and balance copper. 4; An alloy composed of approximately 10% tin,

1% iron, 0.2% phosphorus, and balance copper.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3279899 *Nov 22, 1963Oct 18, 1966Bangert & Theurer K G DrPaper-making screen having at least its warp threads composed of phosphorusbronze alloys
US3923558 *Feb 25, 1974Dec 2, 1975Olin CorpCopper base alloy
US3930894 *Nov 29, 1974Jan 6, 1976Olin CorporationMethod of preparing copper base alloys
US4249941 *Nov 13, 1979Feb 10, 1981Tamagawa Kikai Kinzoku Kabushiki KaishaCopper base alloy for leads of integrated circuit
US4305762 *May 14, 1980Dec 15, 1981Olin CorporationCopper base alloy and method for obtaining same
US4540437 *Sep 25, 1984Sep 10, 1985Alcan Aluminum CorporationTin alloy powder for sintering
US4605532 *Jun 3, 1985Aug 12, 1986Olin CorporationCopper alloys having an improved combination of strength and conductivity
US5853505 *Apr 18, 1997Dec 29, 1998Olin CorporationIron modified tin brass
US5882442 *Feb 9, 1996Mar 16, 1999Olin CorporationIron modified phosphor-bronze
US6132528 *Jun 23, 1998Oct 17, 2000Olin CorporationIron modified tin brass
DE19927646C1 *Jun 17, 1999Mar 1, 2001Wieland Werke AgVerwendung einer zinnreichen Kupfer-Zinn-Eisen-Legierung
DE19927646C5 *Jun 17, 1999May 11, 2006Wieland-Werke AgVerwendung einer zinnreichen Kupfer-Zinn-Eisen-Legierung
DE19928330A1 *Jun 21, 1999Jan 4, 2001Wieland Werke AgVerwendung einer zinnreichen Kupfer-Zinn-Eisen-Legierung
DE19928330C2 *Jun 21, 1999Jan 16, 2003Wieland Werke AgVerwendung einer zinnreichen Kupfer-Zinn-Eisen-Knetlegierung
DE102011016318A1Apr 7, 2011Oct 11, 2012Wieland-Werke AgHartphasenhaltige Kupfer-Zinn-Mehrstoffbronze, Herstellungsverfahren und Verwendung
EP0769563A1 *Mar 15, 1996Apr 23, 1997Olin CorporationIron modified phosphor-bronze
EP2465956A1Dec 15, 2011Jun 20, 2012Wieland-Werke AGCopper-tin multi-alloy bronze containing hard phases, method for producing same and use of same
EP2508630A2Mar 16, 2012Oct 10, 2012Wieland-Werke AGCopper-tin multi-alloy bronze containing hard phases, method for producing same and use of same
U.S. Classification420/472
International ClassificationC22C9/02
Cooperative ClassificationC22C9/02
European ClassificationC22C9/02