US2040797A - Alloy containing copper and phosphorus - Google Patents

Description

' percentage, possess properties, such as g against corrosion, etc. these good qualities ed, because the mec material has been 0 Patented May 12, 1936 UNITED STATESPATENT OFFICE Georg Sachs and Arthur on-the-Main, Germany, Lurgi Corporation, New York, N. Y., a corporation of New York No Drawing. Application Ja No. 584,906. In Germany 2 Claims. .(Cl. 148-32) is possible without splintering the mat without making chips.

Copper with contents of more heretofore considered not to be roll or cold. The invention, compounds of copper wt the pure state or more than 40% by weig It has been found for instanc phosphide containing rendered mechanically ture closely below the me ing point of the euteo copperphosphide cont strained at temperatur 700 C., the material is rendered plastic.

It ishowever highly surprising, that. the material treated in this manner can be rolledout to any desired thickness within a fairly wide range of temperatures, for instance between 400 and 600 C. i'. e. the plasticity of the material is then With higher contents of phosphorus, a more intensive preliminary Burkhardt, Franklortassignors to American nuary s, 1932, Serial January- 9, 1931 It is a known fact, that compounds .of metals with metalloids, such as for example phosphides, arbides and antimonides in the castrittle to a high degree. The

that the compounds cannot even be scratched without breaking into splinters. This brittleness is exhibited also to a great extent ontaining an appreciable percentage of example copper contains a high percentage of copper phosphide, it is so brittle that it can be crushed by trifling shocks. On the other hand compounds of metals and metalloids, and alloys containing them in a high a number of very valuable reat hardness, resistance However the utilization of has hitherto been handi-' than 6% Pwas able either hot. refers to. such ih phosphorus either in alloys containin condition are b brittleness is such in the form of e, that copper 6% 1? may be treatable, 'at a temperalting point. The meltabout 707 C. When aining more than 6% P is es between about 650 and such compounds. If for hanical working of such v onsidered to be impossible.

The object of the present invention is the preparation of alloys comprising a predominating proportion '01 copper and more than -6% of phosorus, which alloys possess greatly improved merties in comparison with hitherto.

the same composition. Because d strength and increased stability they are useful for the manufacture of utensils and tools. The process of improving these mechanical properties consists in mechanically straining or thoroughly kneading at elevated temi. e. temperatures closely b the alloy. By such a treatment th of these alloys is in extent. Moreover by g once or several times at an a kind of ductilization is alloys may be subsequently at low temperatures. There are methods by which certain pure for example 10% P, mechanical treatment at th is required, i. e. th to pressure before sired thickness. containing up to-13% P may e critical temperatures alhas to be subjected it can be rolled down to a dethis manner even phosphides be rolled into thin chanical prope known alloys of of their increase of the material is preceded by an ure at temperatures or about the solidus-point, whereupon d further mechanical aining may of course The kneading application of press 30 to C. below they may under straining. The further str be omitted, if the finally desired shape of th piece can be attain Besides the pure melting pointof particularly the streng creased to an extraordinary thoroughly kneadin elevated temperature attained, so that these strained even already known metals which ar go any desire e brittleafter having been cast, such as tungsten, or chromium, are ductile by hammering. It was however hitherto that also copper relatively high propo be improved in regar chanical strain, for in higher temperature. that by raising cal point the d to such an exten tures is possible. kneading at a temperature uch a permanen the material is attained that a further straining at lower temperatures, even in the cold,

thepossibility arises of hitherto rejected as'being use-- quite a number ofwtechnical purposes;

ample, be particularly meng about 8% phos welding, because such copper be brought into the form oi.

thus facilitating its'emalloys containing a rtion of phosphorus could d to their ductility by me-' stance by pressure at a on, is meant perature to above a critictility oi the material is increased t that straining at high tempera- Moreover by a single thorough closely below the meltt improvement of the There may, for ex tioned a copper alloy containin phorus, suitable for phosphide may now wire or rods by pressure,

ployment in practical use.

By' ductilizati ormed at a temperature closely bepoint whereby its mechanical 1. An alloy containing a predominating proportion of copper and more than 6% but not more than 14% of phosphorus which alloy has been plastically dei low its melting,

properties are improved and its strength increased to 700 0. whereby its mechanical properties are and which is capable of being strained at low temimproved and its strength increased and which is peratures without splinteringr capable of being strained at lower temperatures 2. An alloy containing a. predominating proporwithout splintering.

tion of copper and more than 6% but not more GEORG SACHS.-

than 14% of phosphorous, which alloys has been ARTHUR BURKHARDT.

plastically deformed at a temperature of 650 C.