A high performance molybdenum-rhenium alloy bar, according to the mass percentage, composed of the following components: rhenium 5 ~ 50%, the allowance for molybdenum; As well as the preparation method of the high performance molybdenum-rhenium alloy bar, including the following steps in turn: Step 1, according to the group distribution ratio of molybdenum-rhenium alloy bar, take molybdenum source and rhenium source, pretreat, obtain molybdenum-rhenium alloy powder; Step two, the molybdenum-rhenium alloy powder into the designed mold cavity for pressing molding processing, get the billet; Step 3: Sintering billet at high temperature under reducing atmosphere, inert gas or vacuum condition to obtain sintering billet; Step 4: the sintered billet is rolled and deformed to obtain the rolled bar billet; Step five, the rolling bar billet is annealed and heat treated to obtain the high performance molybdenum-rhenium alloy bar. The molybdenum-rhenium alloy material prepared by the preparation method of the invention has fine grain size, uniform grain size, high density and high strength.
In view of the shortcomings in the prior art, the present invention provides a preparation method of high performance molybdenum-rhenium alloy bar. The molybdenum-rhenium alloy material prepared by powder metallurgy process has fine and uniform grains, high density and high strength.
In order to achieve the above purposes, the invention adopts the following technical scheme: A high performance molybdenum-rhenium alloy bar consisting, as a percentage of mass, of 5 to 50% rhenium with a margin of molybdenum (i.e., a mass fraction of molybdenum ranging from 50 to 95%).
The high performance molybdenum-rhenium alloy bar is composed of rhenium 14 to 47.5% (e.g. 14%, 35%, 41%, 42%, 47.5%) and molybdenum (i.e. 52.5 to 86%) by mass percentage. The technical principle of the preparation method of the invention is as follows: on the one hand, molybdenum-rhenium pre-alloy powder with special ratio is prepared by mixing molybdenum-rhenate ammonium powder and adopting appropriate reduction process; On the other hand, the continuous rolling process has the advantages of fine grain, high density and high pass rate compared with the free forging process.
In the above preparation method, as a preferred implementation, the preparation method also includes machining steps, and the high performance molybdenum-rhenium alloy bar after heat treatment is machinated to obtain the finished product of the high performance molybdenum-rhenium alloy bar.
