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Mo-La-Ce rare earth molybdenum alloy wire and preparation method thereof

A molybdenum alloy and wire technology, which is applied in the field of Mo-La-Ce 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 and 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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  • Mo-La-Ce rare earth molybdenum alloy wire and preparation method thereof

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Embodiment 1

[0018] The preparation process uses ammonium dimolybdate as the raw material to add hydrogen to carry out a reduction to obtain molybdenum dioxide; according to the weight percentage of the alloy design composition in List 1, weigh two kinds of rare earth oxides and dissolve them with concentrated nitric acid for later use; molybdenum dioxide and La(NO 3 ) 3 , Ce(NO 3 ) 4 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-Ce doped molybdenum powder is pressed by cold isostatic pressing to obtain 48mmMo-La-Y rare ear...

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Abstract

The invention relates to a Mo-La-Ce rare-earth molybdenum alloy wire and its process for preparing. The invention is characterized in that the said molybdenum alloy wire contains 0.4 %-1.0% lanthanum oxide and cerium oxide(mass %) and the proportion by weight of lanthanum oxide and cerium oxide is 4:1. The process for preparing is different from the traditional powder metallurgy productive technology, which includes performing vacuum drying and liquid-solid doping for molybdenum dioxide, lanthanum nitrate and cerium nitrate solution, then performing secondary reduction to prepare binary rare-earth doping molybdenum powder, finally preparing rare-earth doping molybdenum wire with Mo-La-Ce of 0.5-0.8mm diameter by impression, agglomeration and pressure processing procedure. The raw materials of this invention is cheap and facile, and the prepared molybdenum wire is of high tensile strength, strong abrasive resistance and simple process and is inflexible, and has high rate of finished products, good compatibility and long durability.

Description

technical field [0001] Mo-La-Ce rare earth molybdenum alloy wire and its preparation method, relating to a molybdenum alloy wire used for parts in special light bulbs and electric light source devices, metal processing cutting wires and heating wires in kilns and its preparation method . 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, in parts with hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/04B22F3/16B21B37/74C21D8/00C21D1/26C21D11/00C22F1/18
Inventor 李大成卜春阳张相一
Owner JINDUICHENG MOLYBDENUM CO LTD
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