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Preparing method of nickel-silicon alloy cast ingot

A technology of nickel-silicon alloy and ingot casting, which is applied in the field of preparation of nickel-silicon alloy ingot, can solve the problems of low silicon content, large silicon volatilization and loss, and poor distribution uniformity of nickel-silicon alloy ingot, and achieve accurate nickel-silicon content , low production cost and high density

Active Publication Date: 2013-12-18
XIAN REFRA TUNGSTEN & MOLYBDENUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional vacuum smelting process is to feed nickel and silicon according to the designed composition, and then smelt them twice or three times. Since the melting point of silicon is lower than that of nickel, and the density of silicon is very different from that of nickel, vacuum smelting The volatilization and loss of silicon in the process is relatively large, resulting in too low silicon content, poor distribution uniformity, and low density in the nickel-silicon alloy ingot, which cannot meet the technical requirements

Method used

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  • Preparing method of nickel-silicon alloy cast ingot
  • Preparing method of nickel-silicon alloy cast ingot
  • Preparing method of nickel-silicon alloy cast ingot

Examples

Experimental program
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Effect test

Embodiment 1

[0023] combine figure 1 , Preparation of Ni-11.15Si nickel-silicon alloy ingot:

[0024] Step 1. According to the design composition of Ni-11.15Si nickel-silicon alloy ingot to be prepared (that is, the mass ratio of nickel to silicon is 88.85:11.15, and the mass percentage of silicon is y=11.15%), weigh nickel strips, silicon powder and nickel Foil, and then mix the nickel strip and silicon powder evenly and cover it with nickel foil to make an alloy bag, and then use a hydraulic press to press the alloy bag to obtain a smelting electrode;

[0025] Step 2. Place the smelting electrode described in step 1 in a vacuum consumable arc furnace for the first vacuum consumable arc melting. After water cooling, remove the surface scale to obtain a cross-sectional diameter of Ф50 mm and a mass of m NiSi-1 =3000g of the first billet; the melting parameters of the first vacuum consumable arc melting are shown in Table 1;

[0026] Step 3, using the Archimedes principle to measure the d...

Embodiment 2

[0034] combine figure 1 , Preparation of Ni-10Si nickel-silicon alloy ingot:

[0035] Step 1. According to the design composition of the Ni-10Si nickel-silicon alloy ingot to be prepared (that is, the mass ratio of nickel to silicon is 90:10, and the mass percentage of silicon is y=10%), weigh nickel strips, silicon powder and nickel foil , and then mix the nickel strip and silicon powder evenly and cover it with nickel foil to make an alloy bag, and then use a hydraulic press to press the alloy bag to obtain a smelting electrode;

[0036] Step 2. Place the smelting electrode described in step 1 in a vacuum consumable arc furnace for the first vacuum consumable arc melting. After water cooling, remove the surface scale to obtain a cross-sectional diameter of Ф60 mm and a mass of m NiSi-1 =4000g of the first billet; the melting parameters of the first vacuum consumable arc melting are shown in Table 2;

[0037] Step 3, using the Archimedes principle to measure the density ρ of ...

Embodiment 3

[0045] combine figure 1 , Preparation of Ni-15Si nickel-silicon alloy ingot:

[0046] Step 1. Weigh nickel strips, silicon powder and nickel foil according to the design composition of the Ni-15Si nickel-silicon alloy ingot to be prepared (that is, the mass ratio of nickel to silicon is 85:15, and the mass percentage of silicon is y=15%) , and then mix the nickel strip and silicon powder evenly and cover it with nickel foil to make an alloy bag, and then use a hydraulic press to press the alloy bag to obtain a smelting electrode;

[0047] Step 2. Place the smelting electrode described in step 1 in a vacuum consumable arc furnace for the first vacuum consumable arc melting. After water cooling, remove the surface scale to obtain a cross-sectional diameter of Ф30mm and a mass of m NiSi-1 =2000g of the first billet; the melting parameters of the first vacuum consumable arc melting are shown in Table 3;

[0048] Step 3, using the Archimedes principle to measure the density ρ of ...

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Abstract

The invention provides a preparing method of a nickel-silicon alloy cast ingot. The preparing method includes the following steps that (1) a nickel bar and silicon powder are wrapped by a nickel foil and made into an alloy package after being mixed evenly, and then a smelted electrode is manufactured in a pressing mode; (2) first vacuum self-consuming electric arc melting is carried out to obtain a first ingot blank; (3) mass content of silicon in the first ingot blank is calculated; (4) the theoretical mass mSi of silicon needing to be added is calculated; (5) a blind hole is drilled in the first ingot blank, silicon powder with the mass ranging from 1.5mSi to 1.6mSi is added into the blind hole, and then secondary vacuum self-consuming electric arc melting is carried out to obtain a second ingot blank; (6) third vacuum self-consuming electric arc melting is carried out to obtain the nickel-silicon alloy cast ingot. The preparing method is low in production cost, simple in production process, strong in repeatability, high in yield, and suitable for large-scale industrial production. The nickel-silicon alloy cast ingot prepared through the method is accurate and controllable in silicon content, good in distribution uniformity and high in density.

Description

technical field [0001] The invention belongs to the technical field of nickel-silicon alloys, and in particular relates to a method for preparing nickel-silicon alloy ingots. Background technique [0002] Nickel-silicon alloy was first developed in the late 1930s, and related research and production began in my country in the mid-1950s. Nickel-silicon alloy has high mechanical properties, good cold and hot pressure processing performance, excellent corrosion resistance, chemical stability in the atmosphere, fresh water and sea water, and can withstand the corrosion of various neutral solutions, slightly acidic solutions and organic solvents , especially an excellent material resistant to heat and alkali corrosion. In recent years, nickel-silicon alloys have been widely used in the corrosion-resistant construction of machinery and chemical equipment, and are mainly used as structural parts of precision instruments, parts of electronic tubes and radio equipment, medical equip...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C19/03
Inventor 刘洋侯军涛郭磊
Owner XIAN REFRA TUNGSTEN & MOLYBDENUM
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