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Preparation method of intermediate alloy for R60705 zirconium alloy cast ingot

A master alloy and zirconium alloy technology, which is applied in the field of preparation of master alloy for R60705 zirconium alloy ingot casting, can solve the problems of low degree of homogenization and low addition content, so as to avoid high-density inclusions, improve homogenization, and promote uniformity the effect of

Active Publication Date: 2022-06-21
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, Nb shavings and sponge zirconium are alloyed to prepare Nb-Zr master alloys for R60705 zirconium alloy ingots, which increases the proportion by mass percentage, thereby avoiding the enrichment of Nb elements, and improving

Method used

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  • Preparation method of intermediate alloy for R60705 zirconium alloy cast ingot
  • Preparation method of intermediate alloy for R60705 zirconium alloy cast ingot
  • Preparation method of intermediate alloy for R60705 zirconium alloy cast ingot

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment includes the following steps:

[0026] Step 1. Clean up the processing site to prevent foreign matter from entering, use a lathe to turn the Nb bar into chips with a thickness × width × length of (0.5mm±0.1mm) × (5mm±1mm) × Lmm, and then manually screen and cut To the length of 25mm ~ 35mm, then put it into a V-type mixer, add ethanol to clean, and place it in an oven to dry at 80 ° C for 60 minutes to obtain Nb chips; the chemical composition of the Nb rod is shown in Table 1 below;

[0027] Chemical composition (wt%) of Nb rods in Table 1 Example 1

[0028]

[0029]

[0030]Step 2, carry out double-layer sieving of sponge zirconium, wherein the size of the upper sieve is φ12.4mm, and the size of the lower sieve is φ6mm, to obtain particles with a particle size of 3mm to 12.4mm, and then manually select the abnormal surface color material that affects the use ( Blue and yellowish, etc.) and hard lumps to obtain zirconium sponge for use; the chemi...

Embodiment 2

[0040] This embodiment includes the following steps:

[0041] Step 1. Clean up the processing site to prevent foreign matter from entering, use a lathe to turn the Nb bar into chips with a thickness × width × length of (0.5mm±0.1mm) × (5mm±1mm) × Lmm, and then manually screen and cut To the length of 25mm~35mm, put it into a V-type mixer, add ethanol to clean, place it in an oven and dry it at 100°C for 40min to obtain Nb chips; the chemical composition of the Nb rod is shown in Table 1 in Example 1. ;

[0042] In step 2, the sponge zirconium is subjected to double-layer sieving, wherein the size of the upper sieve is φ9mm, and the size of the lower sieve is φ3mm, so as to obtain particles with a particle size of 3mm to 9mm, and then manually select the abnormal surface color material (blue hair) that affects the use. Huang etc.) and hard block material, obtain the zirconium sponge for use; the chemical composition of the zirconium sponge is as shown in Table 2 in Example 1; ...

Embodiment 3

[0050] This embodiment includes the following steps:

[0051] Step 1. Clean up the processing site to prevent foreign matter from entering, use a lathe to turn the Nb bar into chips with a thickness × width × length of (0.5mm±0.1mm) × (5mm±1mm) × Lmm, and then manually screen and cut To the length of 25mm ~ 35mm, then put it into a V-type mixer, add ethanol to clean, and place it in an oven to dry at 90 ° C for 50 min to obtain Nb chips; the chemical composition of the Nb rod is shown in Table 5 below;

[0052] The chemical composition (wt%) of Nb rod in table 5 embodiment 3

[0053] Ni Ti Fe Cr Zr Mo W ＜0.001 0.001 ＜0.001 ＜0.001 ＜0.001 ＜0.001 ＜0.001 C N Si Ta O H 0.0043 0.005 ＜0.005 0.006 0.005 ＜0.001

[0054] Step 2, carry out double-layer sieving of sponge zirconium, wherein the size of the upper sieve is φ12.4mm, and the size of the lower sieve is φ6mm, to obtain particles with a particle size of 3mm to 12.4mm, and ...

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Abstract

The invention discloses a preparation method of an intermediate alloy for an R60705 zirconium alloy cast ingot. The method comprises the following steps: 1, turning a Nb rod, selecting, shearing, cleaning and airing to obtain Nb scraps; 2, screening the sponge zirconium, and selecting to obtain the sponge zirconium for later use; thirdly, the sponge zirconium to be used and the Nb scrap cloth are pressed, combined and welded to obtain a consumable electrode; fourthly, the consumable electrode is subjected to secondary smelting, and a cast ingot of the intermediate alloy for the R60705 zirconium alloy cast ingot is obtained; and 5, after turning, cleaning, drying and magnetically separating to obtain the intermediate alloy for the R60705 zirconium alloy cast ingot. According to the method, Nb scraps and sponge zirconium are alloyed to prepare the Nb-Zr intermediate alloy for the R60705 zirconium alloy cast ingot, the matching mass percent is increased, the situation that Nb elements are enriched to form high-density inclusions is avoided, the homogenization of components of the R60705 zirconium alloy cast ingot is improved, and the quality of the R60705 zirconium alloy cast ingot is improved.

Description

technical field [0001] The invention belongs to the technical field of master alloys for zirconium alloy ingots, and particularly relates to a preparation method of an R60705 master alloy for zirconium alloy ingots. Background technique [0002] The nominal composition of R60705 zirconium alloy is Zr-2Nb. At present, Nb chips or Nb powder and sponge zirconium are generally used as raw materials in industrial production. Using Nb chips or Nb powder as raw materials directly into the ingot to produce R60705 zirconium alloy ingots has the following disadvantages: (1) The melting point of pure Nb chips or Nb powder is 2468 °C, while the melting point of the matrix Zr is 1850 °C, and the melting point difference is too large (2) For the production of zirconium alloy ingots, using pure metal Nb scraps or Nb powder to prepare electrode blocks, there is Nb element enrichment in some areas, which is not suitable for the production of zirconium alloy ingots. It is beneficial to the d...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C16/00C22C27/02C22B9/20
CPCC22C1/03C22C16/00C22B9/20C22C27/02Y02E30/30
Inventor 张智王超南张哲刘华杨斌李维贠鹏飞
Owner WESTERN TITANIUM TECH
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