A microwave oven magnetron rhenium- tungsten electrode preparation yttrium specific embodiment of invention, 1

Yttrium tungsten rhenium microwave oven magnetron electrode preparation tungsten rhenium invention yttrium A microwave oven magnetron electrode which count the composition comprises by weight percentage of 1% yttrium , rhenium were 0.1 %, 0.5 %, 2% , the balance of tungsten ; microwave oven magnetron cathode yttrium tungsten rhenium spring-like structure , an outer diameter of 2.4mm, diameter of 0.3,0.5 mm.

A microwave oven magnetron rhenium- tungsten electrode preparation yttrium specific embodiment of invention, 2

Yttrium tungsten rhenium microwave oven magnetron electrode preparation process invention yttrium microwave oven magnetron electrode tungsten rhenium component comprises by weight percentage calculated yttrium were 0.3 %, 0.8 %, 2.5 %, 3% , 1% rhenium , tungsten than volume .

Yttrium tungsten rhenium microwave oven magnetron electrode preparation process a preferred value: 0.6 2% yttrium , 0.5 % rhenium , tungsten margin, its performance is more prominent.

Yttrium tungsten rhenium microwave oven magnetron electrode preparation 0.1-2 invention, rhenium , yttrium, 0.3 3 % weight percent of tungsten, and the balance of the processing conditions of the present invention will have an important condition for optimum performance , to obtain the good results.

Through the above process technologies , the impurity content of the alloy material decrease , while dramatically reducing metallic stress and stress , improve the strength and ductility of the material .

Described above is only a microwave oven magnetron rhenium tungsten electrode preparation yttrium preferred embodiment of the invention , it should be noted that for those of ordinary skill in the creation of the present invention without departing from the concept of the premise, but also certain modifications and improvements may be made , which are part of the scope of the present invention .


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Microwave oven magnetron electrode, electron emitters , is an integral part of the interaction space . The performance of the magnetron cathode operating characteristics and lifetime great impact , is considered the heart of the magnetron . People in order to improve the function of the electron emission cathode , in a pure tungsten material added thorium , but this system is made ​​of alloy cathode product exists brittle at room temperature and high temperature brittleness of congenital defects has not yet solved . Magnetron cathode lead in the production, transport and use occurred during uncontrolled rupture , resulting in failure of the magnetron . Seriously affect the reliability of the product , increasing the manufacturing cost. In addition , radioactive thorium , thorium added as the main raw material , in the smelting , production, transport and use, the environmental pollution , the final product made ​​of the contact potential human health is also adversely affected, and Th half-life of 1.39 × 10 10 years, it is difficult to recycle , and its discarded products constitute a threat of pollution to the environment , so while China is currently the world's 100% commitment microwave oven magnetron production of rare earth thorium as an extremely important strategic resource , nuclear power can be used for clean energy manufacturing , therefore, from the viewpoint of the rational use of resources , in the microwave , to provide an alternative to the existing thoriated tungsten cathode magnetron has become an important research topic in the field .

Rhenium Yttrium tungsten electrode microwave oven magnetron and its preparation process object of the invention is to solve the inadequacy of existing technology to provide not only a good product performance , long life , low production costs , and no radiation in the microwave magnetron tungsten rhenium yttrium cathode . Yttrium tungsten rhenium microwave oven magnetron electrode and its preparation process is another object of the invention is to provide a tungsten- rhenium yttrium said microwave oven magnetron cathode preparation .


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Microwave oven magnetron rhenium tungsten electrode and preparation of yttrium process of the invention over the prior art , with the following innovations :

1, The alloys were prepared by the wet mixture , the yttrium , tungsten fully mixed to ensure uniformity of subsequent grains .

2, The alloy powder was purified using temperature programming process , taking advantage of the melting point of the impurity components sufficiently different makes gasification melting impurities , reducing the amount of impurities in the alloy powder to improve the material strength and ductility.

3 , With the second vertical melt , prior to crystallization of the alloy powder with a high temperature above 2000 ℃ to remove impurities in metals , reduce the impurities in the metal alloy powder content, improve the strength and ductility.

4,The alloy material for the cooling process using alumina powder insulation, the cooling process is slow , substantially reduce the stress of the material , thereby improving the strength of the alloy and plastic .

5 , Using a long process of drawing furnace , divided 3 temperature of the heating from low to high temperatures and then using a parabolic cooling process control , the purpose is to remove excessive stress due to metal
Large induced defects :

a, Deformation Poor ; b, Grain boundary Poor Adhesion ;

c, The deformation of poor stability thereby increasing the wire size and error , which also led to the rough material and ultra tolerances. Directly affect the yield and quality of materials , and now the drawing process can make the grain fiber uniformity within the product structure , seismic strengthening , re-processing performance, size tolerances .


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A microwave oven magnetron yttrium rhenium tungsten electrode preparation process, which comprises the following steps :

a, Mixture , calculated by weight percent : 0.3 3% yttrium , 0.1-2 % rhenium , tungsten, rhenium, the balance in the proportion of yttrium solution and ammonium paratungstate , tungsten, yttrium mixed into a mixture of rhenium ;

b, The first hydrogen reduction , the use of temperature-programmed manner 400 900 ℃ stages remain , for every stage 8 15min;

c, The second hydrogen reduction , the use of temperature-programmed manner 600 1100 ℃ stages remain , for every stage 8 15min, prepared yttrium tungsten rhenium alloy powder ;

d, Compacts , secondary vertical melt at 2000 2700 ℃ phases remain 10 20 min;

e, Forged after cooling , alumina insulation, the alloy material to cool slowly ;

f, Drawing, using a long furnace , divided 3 warm period, the first phase of the 480 550 ℃, the second phase 900 1000 ℃, the third phase 700 800 ℃, heat from low to high and then using a parabolic cooling process control ; < br />
g, Electrolysis , cutting , sodium clean shape.


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