Rare earth molybdenum alloy wire and preparation method thereof

A technology of molybdenum alloy and wire, which is applied in the field of rare earth molybdenum alloy wire and its preparation, can solve the problems of low strength, short service life and poor wear resistance of pure molybdenum wire, and achieve good product consistency, long service life, The effect of strong wear resistance

Inactive Publication Date: 2006-12-13
JINDUICHENG MOLYBDENUM CO LTD
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Problems solved by technology

In the metal processing industry, wire-cut molybdenum wire is required to have high strength, high wear resistance, low plasticity, and long service life. In contrast, pure molybdenum wire has low strength, poor wear resistance, high plasticity, and long service life. Short, can not meet the needs of users in the machinery industry

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  • Rare earth molybdenum alloy wire and preparation method thereof

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Embodiment 1

[0020] Ammonium dimolybdate was used as a raw material to add hydrogen to carry out a reduction to obtain molybdenum dioxide; two rare earth oxides were weighed according to weight percentage and dissolved with concentrated nitric acid for later use; molybdenum dioxide and La(NO 3 ) 3 , Y(NO 3 ) 3 The solution is doped in a double-cone vacuum drying doping pot, where the pressure of the air compressor pump is 0.2MPa, the drying temperature of the doping pot is 70°C, and the vacuum degree inside the doping pot needs to be controlled above 0.06MPa; Molybdenum dioxide is subjected to secondary hydrogen reduction in a four-tube high-temperature muffle furnace, and the hydrogen flow rate is 2.2M 3 / H, the loading capacity of the boat is 1.0kg / boat, and the speed of pushing the boat is 4 boats / 60min; the Mo-La-Y doped molybdenum powder is subjected to cold isostatic pressing to obtain 48mmMo-La-Y rare earth doped molybdenum Rods, the pressing pressure of cold isostatic pressing ...

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Abstract

The invention relates to a rare-earth molybdenum alloy wire and its process for preparing. The invention is characterized in that the said alloy wire contains two rare-earth oxides including lanthanum oxide and Y oxide(mass %) which is 0.4 %-1.0% of the alloy amount and the proportion by weight of lanthanum oxide and Y oxide is 4:1. The process for preparing is different from the traditional powder metallurgy productive technology, which includes performing double-cone vacuum drying and liquid-solid doping at molybdenum dioxide stage, then performing secondary reduction to prepare binary rare-earth doping molybdenum powder, finally preparing rare-earth doping molybdenum wire with Mo-La-Y of 0.5-0.8mm diameter by impression, agglomeration and pressure processing procedure. Compared with the pure molybdenum, the product is of good high-temperature behavior and high recrystallization temperature which increases by 300-500 DEG C than the pure molybdenum, and is of high intensity and abrasive resistance, low ductility and long durability, which has wide application in the mechanical process industry.

Description

technical field [0001] A rare earth molybdenum alloy wire material and a preparation method thereof relate to a molybdenum alloy wire material used for parts in special light bulbs and electric light source devices, metal processing cutting wires and heating wires in kilns and a preparation method thereof. Background technique [0002] Because refractory metal molybdenum has high high temperature strength, good electrical and thermal conductivity, low expansion coefficient and easy processing, it is used in special bulbs and electric light source devices such as automotive tungsten halogen lamps, high-pressure sodium lamps, lighting tungsten halogen lamps, etc. Molybdenum wire is widely used to manufacture parts such as bulb hooks, core wires for winding filaments, guide rods, lead-out wires, and plastic brackets. It is widely used as wire-cut molybdenum wire in the metal processing industry, and in the kiln industry. It is used as heating wire for hydrogen furnace. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/05B22F3/16B21B37/74C21D8/00C21D1/26C21D11/00C22F1/18
Inventor 李大成卜春阳
Owner JINDUICHENG MOLYBDENUM CO LTD
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