Патент USA US2137283код для вставки
2,137,283 Patented Nova-22, 1938 UNITED STATES PATENT OFFICE corrna more Franz R. Hensel and Earl I. Larsen, Indianapolis, Ind., 'assignors to P.~R.. Mallory & Co., Inc., " Indianapolis, Ind., a corporation of Delaware No‘Drawing. Application August 12, 1938, Serial No. 224,499 1 Claim. (Cl. 75——159) and then introduce a'predetermined amount of This invention relates to copper alloys. this alloy into a coppermelt, containing the other This case is a continuation in part of our co in the desired proportions. pending application S. N. 164,032, filed September I ingredients After the alloy has been prepared according 15, 1937. . An object of the invention is to improve the to- such methods, the material may be heat 5 treated by ?rst‘quenching the'alloy in the form physical, chemical and electrical characteristics of a billet or sand casting, or any other form, of such alloys. ' ' Other objects of the invention will be apparent , from above 700° C. and subsequently aging at ‘a temperature below 700° C. In certain cases, we have found it also advisable to use one heat 10 from the following description, taken in connec tion with the appended claim. I treatment only, namely, the low temperature treatment, and eliminate the quenching treat The present invention comprises a combination of elements, methods of manufacture, and the product thereof, brought out and exempli?ed in the disclosure hereinafter set“ forth, the scope of lit the invention being indicated in the appended ment. 4 ' I ‘If the materials are processed by rolling, ex truding, drawing, forging or any other fabricat- l5 ing methods, we have found it desirable in many While a preferred embodiment of- the invention cases to quench the materials from the interme is described herein, it is contemplated that con-. diate anneals, cold working same and applying an aging treatment afterwards. This cold work siderable variation may be made in the method ing before aging hastens considerably the pre- 20' claim. ‘ . ' ' 20 of procedure and the combination of elements, ' vgithout departing from the spirit of the inven t on. . The present invention relates to the improve ment of alloys of copper and zirconium. As 2% cording to the present invention the improved after aging in order to improve the surface ?nish ' of the wrought material. alloys are made of the following elements in substantially the following proportions; _ I - Per cent Metal selected from the group consist‘ ing of iron, cobalt and nickel ______ .... 0. 1 to 30 3 cipitation of thedispersed phase. In addition, a certain amount of cold work may be applied , An example of an alloy produced according to 25 the present invention is: . Per cent Zirconium __________________________ __ 0.. 6'! Cobalt- 2.04: Silicon ___ 0.83 at: Copper _________ _.-. __________________ _- balance Zirconium _________________________ _.. 0. 05 to 5 Beryllium __________________ _._- _____ __ 0. 05 to 3 Copper ___ balance - Where high electricalconductivities are de sired, it is preferred to keep the proportion of iron 7 group metal within an upper limit of 5%. , The alloys of the present invention may ‘also contain small‘proportions, or even up. to “several 40 percent, of zinc, tin, calcium, lithium, magnesium, phosphorus and silver. I f‘, The beryllium combines with theiroh group metal or metals to form the beryllide"th'er'eof and thereby imparts age-hardening characteristics to 45 the alloy. .obtained,,with an excess of 45% electrical con- 35 ductivity. Cold working before or after aging had little effect on the hardness. ‘ The addition of zirconium has further bene ?cial effects, in so far as it raises the annealing temperature,v and at the same time provides a 4% very fine grain'structure, which is highly desir able ifthe material is to be worked into sheets,‘ ' strips, or tubing. The composition which has exceptional merits for ‘condenser tubing is as follows‘: ‘ ' _ The addition of zirconium in this type of alloy . . - its Per cent ' not only imparts additional age-hardening char Nickel ‘ acteristics, but also’produces a material of cor rosion resistance, hgh strength at elevated'tem Beryllium ____________________ _..'.._.‘.'__ 0. 05 to 3 50 peratures and superior fatigue and impact prop erties. ‘ » ' I i- ~ The-alloys can be made according to standard alloying methods. A preferred method’ for intro ducing the zirconium is to prepare a hardener al 55 After quenching this alloy from 950° C. and ag ing at 450° 0., a Rockwell B hardness of 105 was loy containing a high percentage oi.’ zirconium Zirconium Copper ____ r. ____________ __' ________ __ 15 to 30 0. 05 to 5 balance 50 ' 'While'the present invention as to its objects and advantages has been described herein as carried out, in speci?c embodiments, it is not desired to be limited thereby, but it is intended to 55 , 2 ~ 2,137,983 cover the invention broadly within the appended clalm. What is claimed is: ‘ ,_ A heat-treated alloy composed of 0.05 to 5% o zirconium, 0.1 to 30% of a metal or a combinatlon of metals selected from the group consist- in: of iron, cobalt and nickel, 0.05 to 3% beryl- lium, and the balance substantially all copper, characterized by high hardness and further char acterized by the fact that its hardness is not per manently adversely affected by temperatures in the order of 450° C. ‘ ' FRANZ R. HENSEL. ' EARL I. LARSEN.