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Preparation method of niobium-tungsten-molybdenum-zirconium alloy ingot

A zirconium alloy and niobium-tungsten technology is applied in the field of preparation of niobium-tungsten-molybdenum-zirconium alloy ingots, which can solve the problems affecting the consistency of material structure and performance, and achieve the effect of low density

Active Publication Date: 2014-07-09
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, after adding zirconium to the mass content of zirconium in Nb521 niobium-tungsten alloy to not less than 1.0%, the traditional electron beam melting method will be due to the physical properties such as the solid solubility of zirconium in niobium and the difference in density between zirconium and niobium. The degree of zirconium segregation in the finished alloy ingot exceeds 50%, which affects the consistency of the structure and properties of the material

Method used

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  • Preparation method of niobium-tungsten-molybdenum-zirconium alloy ingot
  • Preparation method of niobium-tungsten-molybdenum-zirconium alloy ingot
  • Preparation method of niobium-tungsten-molybdenum-zirconium alloy ingot

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Embodiment 1

[0029] The preparation method of the niobium-tungsten-molybdenum-zirconium alloy ingot of the present embodiment comprises the following steps:

[0030] Step 1. Neatly stack 48 niobium-tungsten-molybdenum metal strips 1 with a width and thickness of 14mm and a length of 300mm, so that the length of the neatly stacked niobium-tungsten-molybdenum metal strips is 1200mm, the width is 42mm, and the thickness is 56mm , and lay the first pure zirconium plate 2 horizontally in the middle of the neatly stacked niobium-tungsten-molybdenum metal strips, then place the niobium-tungsten-molybdenum metal strips with the first pure zirconium plates 2 in the argon arc welding box, and place the first The pure zirconium plate 2 and the neatly stacked niobium-tungsten-molybdenum metal strips are argon-arc welded to obtain a smelting electrode with a weight of 22.6Kg; the length and width of the first pure zirconium plate 2 are the same as the neatly stacked niobium-tungsten Molybdenum metal st...

Embodiment 2

[0040] The preparation method of the niobium-tungsten-molybdenum-zirconium alloy ingot of the present embodiment comprises the following steps:

[0041] Step 1. Neatly stack 24 niobium-tungsten-molybdenum metal strips 1 with a width and thickness of 15mm and a length of 600mm, so that the length of the neatly stacked niobium-tungsten-molybdenum metal strips is 1200mm, the width is 45mm, and the thickness is 60mm , and lay the first pure zirconium plate 2 horizontally in the middle of the neatly stacked niobium-tungsten-molybdenum metal strips, then place the niobium-tungsten-molybdenum metal strips with the first pure zirconium plates 2 in the argon arc welding box, and place the first The pure zirconium plate 2 and the neatly stacked niobium-tungsten-molybdenum metal strips are argon-arc welded to obtain a smelting electrode with a weight of 27.2Kg; the length and width of the first pure zirconium plate 2 are the same as the neatly stacked niobium-tungsten Molybdenum metal st...

Embodiment 3

[0051] The preparation method of the niobium-tungsten-molybdenum-zirconium alloy ingot of the present embodiment comprises the following steps:

[0052] Step 1. Neatly stack 12 niobium-tungsten-molybdenum metal strips 1 with a width and thickness of 16mm and a length of 1200mm, so that the length of the neatly stacked niobium-tungsten-molybdenum metal strips is 1200mm, the width is 48mm, and the thickness is 64mm, and lay the first pure zirconium plate 2 horizontally in the middle of the neatly stacked niobium-tungsten-molybdenum metal strips, and then place the niobium-tungsten-molybdenum metal strips with the first pure zirconium plates 2 in the argon arc welding box. A pure zirconium plate 2 and neatly stacked niobium-tungsten-molybdenum metal strips are argon-arc welded to obtain a smelted electrode with a weight of 29.9Kg; the length and width of the first pure zirconium plate 2 are the same as the neatly stacked niobium The tungsten and molybdenum metal strips are the sa...

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Abstract

The invention provides a preparation method of a niobium-tungsten-molybdenum-zirconium alloy ingot. The preparation method comprises the following steps: 1, tidily stacking a plurality of niobium-tungsten-molybdenum metal strips, laying a first pure zirconium in the middle of the stacked niobium-tungsten-molybdenum metal strips, and welding to form a smelting electrode; 2, performing twice vacuum electron beam smelting to the smelting electrode to obtain a semi-finished ingot; 3, cutting a second pure zirconium plate into a plurality of pure zirconium strips; 4, tightly attaching the pure zirconium strips to the outer surface of the semi-finished ingot to obtain a consumable electrode for electric arc smelting; and 5, performing twice vacuum consumable electric arc smelting to obtain the niobium-tungsten-molybdenum-zirconium alloy ingot. The niobium-tungsten-molybdenum-zirconium alloy ingot prepared according to the preparation method provided by the invention has favorable uniformity of components of organization, can keep low intensity without changing excellent room-temperature property and high-temperature property, and is significant to be used in spaceflight.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a method for preparing a niobium-tungsten-molybdenum-zirconium alloy ingot. Background technique [0002] Nb521 niobium-tungsten alloy is a kind of niobium-tungsten-molybdenum-zirconium alloy, which is composed of base metal niobium and alloying elements tungsten, molybdenum and zirconium; Long-term work below ℃, it has a good application prospect in aerospace rocket engine components. Nb521 niobium-tungsten alloy is usually smelted and cast in an electron beam furnace, and the density of Nb521 niobium-tungsten alloy is 8.85g / cm 3 ~9.0g / cm 3 between. In order to improve the strength, the carbon content of the Nb521 niobium-tungsten alloy ingot is usually increased to 0.05% to 0.12%, which will generate a large number of carbides such as ZrC and WC. The hardness of these carbides is very high, which will cause subsequent processing. Unexpected cracks, del...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C27/02
Inventor 武宇赵鸿磊王飞郭海生姚修楠宜楠文琳张琨宇
Owner 西安诺博尔稀贵金属材料股份有限公司
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