Mo Y alloy wire rod production process

Process by powder metallurgy method, the choice of ammonium molybdate as raw material, restore, and add the baking solution of yttrium oxide, molybdenum prepared by mixing yttrium alloy powder; and then by pressing, sintering and processing trial with good rolling performance of molybdenum Y alloy wire rod, drawn wire molybdenum rod of yttrium alloy industrial production process. Test system discussed adding yttrium oxide method, add volume and add process.The results showed that: additives in the milling process in the reduction of the matrix particles have a strong refinement, and with the addition of the strengthening of the increase; additives will make the matrix have the phenomenon of the sudden increase in oxygen trace; and found that is due to particle size composition, specific surface area resulting from the change, is inevitable; yttrium oxide reduction process does not occur in the chemical change, and ultimately to oxygen in the form of coated particles in the base body.

Isostatic molded and formed of two way shape compared. The results showed that: the body's oxygen-based particles coated particles is one of the causes broken compacts, with the addition of increasing their performance even more prominent. The mold and the use of appropriate conditions, molybdenum yttrium alloy powder during cold isostatic pressing molding has a good performance for machining process. Sintering of molybdenum chemical composition of yttrium alloy billets have a significant impact.

It was found: get down low melting impurities sintered alloy billets, activated sintering, and sintering to obtain the blank medium frequency induction high impurity content.Impurities in the body billet power escaping from the green body sintering temperature, heating system and the speed of pore shrinkage, sintering neck to grow at the same time and sintering atmosphere on the furnace. Mo has a larger density of sintered yttrium alloy powder has an excellent stock to processing performance, under certain conditions, the rotary forging, stretching can be smoothly processed into molybdenum alloy wire rods, and then, and then annealed at 1300 ℃, with good match the strength and ductility, the alloy can be successfully rolled foil. Yttrium alloy wire molybdenum recrystallization temperature range between 1600-1900 ℃.