The mixture for the manufacture of the base alloy of molybdenum

 

(57) Abstract:

The invention relates to metallurgy, in particular the production of alloys of molybdenum, used for the manufacture of products having threaded connections and functioning at high temperatures, such as electrodes. The purpose of the invention to provide an alloy having a high resistance to shear at high temperatures while maintaining high conductivity. The inventive composition for the manufacture of an alloy containing molybdenum, copper, Nickel, tantalum, additionally contains chromium oxide and boric vanadium in the following ratio, wt. % : copper 10 - 25; Nickel 0,1 - 0,35; chromium oxide 0,15 - 0,25; tantalum 0,10 - 0,30; bored vanadium 0,05 - 0,2; molybdenum else. table 1.

The invention relates to metallurgy, in particular the production of alloys of molybdenum, used for the manufacture of products having threaded connections and functioning at high temperatures, for example electrodes.

Known mixture for the manufacture of an alloy based on tungsten containing, by weight. % : Nickel 2-7; copper 1-5; Bor of 0.05-0.5; chromium oxide is 0.01 to 0.5 [1] .

Products made from this mixture, have low soprotivlenie for the manufacture of the alloy, used for making electrical contacts with at least one metal from the group of W, Mo and Ta and at least one metal from the group of Ag, Ni, Co, Fe, Cu, Al, Au, Cr, Pl. As deacylating agent mixture may contain titanium in the amount of 3-15 wt. % . [2] .

Products obtained from this mixture, have a high electrical conductivity, but low resistance to shear at high temperatures, up to 40 kgf/mm2.

The purpose of the invention to provide an alloy having a high resistance to shear at high temperatures while maintaining high conductivity. The goal is solved in that the mixture for the manufacture of an alloy containing molybdenum, copper, Nickel, tantalum, additionally contains chromium oxide and boric vanadium in the following ratio, wt. % : Copper 10-25 Nickel Of 0.1-0.35 chromium Oxide 0,15-0,25 Tantalum 0,10-0,30 Bored vanadium 0.05 to 0.2 Molybdenum Else

The addition of chromium oxide in the mixture in amount of 0.15-0.25. % increases the shear resistance of the alloy at high temperatures by increasing the heat resistance of the bundle of alloy based on copper. When the content of chromium oxide less than 0.15 wt. % increase of the shear no, when the content of chromium oxide greater than 0.25 wt. % reduced Elena alloy slice by grinding its structure. When the content of boride vanadium less than 0.05 wt. % increase of the shear does not occur, when the content is more than 0.2 wt. % is the embrittlement of the alloy and receiving poor quality thread (chipping).

P R I m e R 1. To obtain the base alloy of molybdenum was prepared by three of the charge composition containing, by weight. % : copper 10; 17, 5 and 20; Nickel 0,1; 0,18; 0,35; chromium oxide 0,15; 0,20; 0,25; tantalum 0,1; 0,2; 0,3; bored vanadium 0,05; 0,125; 0,2; the rest is molybdenum.

Each mixture was stirred in a glass ball mill and specaly at a temperature of 1400aboutC for 2 h

Properties of the samples are given in table.

P R I m m e R 2. As in example 1, the product of the mixture with different content components.

Properties of the samples are given in table.

High properties of the alloy obtained from the proposed charge, can be effectively used as a material of the composite electrodes and other conductive elements having threaded connections used in electrical and metallurgical industries. (56) 1. USSR author's certificate N 293064, class C 23 C 19/00, 1971.

2. U.S. patent N 2179960, CL 29-182, 1939.

The MIXTURE FOR MANUFACTURING the take chromium oxide and boric vanadium in the following ratio of components, wt. % :

Copper 10 - 25

Nickel 0,1 - 0,35

The chromium oxide 0,15 - 0,25

Tantalum 0.1 to 0.3

Bored vanadium 0,05 - 0,2

Molybdenum Else

 

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