Vacuum smelting process for nickel-based alloy containing aluminium, titanium, boron and zirconium

A nickel-based alloy, vacuum smelting technology, applied in the field of alloy smelting technology, can solve the problems of easy segregation, affecting the overall performance of the alloy, low density, etc., and achieve the reduction of harmful gas and low-melting impurity content, and the alloy melt is pure and improved. The effect of long-lasting performance

Active Publication Date: 2016-06-29
SHANDONG ROITIE NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, because aluminum, titanium, boron, and zirconium are relatively light and have low density, after being added to the molten metal, they float on the surface of the molten metal and are prone to segregation, which will seriously affect the overall performance of the alloy.

Method used

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  • Vacuum smelting process for nickel-based alloy containing aluminium, titanium, boron and zirconium
  • Vacuum smelting process for nickel-based alloy containing aluminium, titanium, boron and zirconium
  • Vacuum smelting process for nickel-based alloy containing aluminium, titanium, boron and zirconium

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Embodiment 1

[0023] Taking the K424 alloy as an example, the vacuum smelting process of the present invention is used to produce the K424 alloy ingot, its chemical composition is shown in Table 1, its performance parameters are shown in Table 2, the K424 alloy standard chemical composition is shown in Table 3, and the K424 alloy standard performance parameters are shown in Table 4.

[0024] Using a 200Kg vacuum furnace, the smelting process is as follows:

[0025] (1) Add all elements in the nickel-based alloy except aluminum, titanium, boron, zirconium and nickel to the crucible of the vacuum furnace and smelt at 1570±10°C for 20 minutes;

[0026] (2) Cool down to 1380±10°C, add aluminum and titanium to it, heat up until the aluminum and titanium are completely melted, and then stir for 3 minutes;

[0027] (3) Keep the temperature at 1420±10°C, add nickel-boron alloy and zirconium to it, heat up at 200KW until the nickel-boron alloy and zirconium are completely melted, and then stir for 5...

Embodiment 2

[0040] The smelting process is as follows:

[0041] (1) Add all elements in the nickel-based alloy except aluminum, titanium, boron, zirconium and nickel to the crucible of the vacuum furnace and smelt at 1580±10°C for 25 minutes;

[0042] (2) Cool down to 1370±10°C, add aluminum and titanium to it, heat up until the aluminum and titanium are all melted, and then stir for 4 minutes;

[0043] (3) Keep the temperature at 1430±10°C, add nickel-boron alloy and zirconium to it, heat up at 200KW until the nickel-boron alloy and zirconium are completely melted, and then stir for 4 minutes to obtain a molten metal;

[0044] (4) Cool down, freeze the molten metal, when the temperature drops to 1360±10°C, then raise the temperature to 1470±10°C with 200KW, reduce the power to 80KW, and carry out tapping and pouring.

[0045] All the other are as embodiment 1.

Embodiment 3

[0047] The smelting process is as follows:

[0048] (1) Add all elements in the nickel-based alloy except aluminum, titanium, boron, zirconium and nickel to the vacuum furnace crucible and smelt at 1560±10°C for 30 minutes to form a molten metal;

[0049] (2) Cool down to 1390±10°C, add aluminum and titanium to it, heat up until the aluminum and titanium are all melted, and then stir for 5 minutes;

[0050] (3) Keep the temperature at 1410±10°C, add nickel-boron alloy and zirconium to it, heat up at 200KW until the nickel-boron alloy and zirconium are completely melted, and then stir for 3 minutes to obtain a molten metal;

[0051] (4) Cool down and freeze the molten metal. When the temperature drops to 1380±10°C, heat up to 1450±10°C with 200KW and reduce the power to 80KW for tapping and pouring.

[0052] All the other are as embodiment 1.

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Abstract

The invention relates to an alloy smelting process, and specifically relates to a vacuum smelting process for a nickel-based alloy containing aluminium, titanium, boron and zirconium. The vacuum smelting process comprises the following steps: adding all elements in the nickel-based alloy except aluminium, titanium, boron, zirconium and nickel into a vacuum furnace crucible, and smelting; cooling molten metal to 1370-1390 DEG C, adding aluminium and titanium into the molten metal, and heating until the aluminium and titanium are completely fused; keeping a temperature of 1410-1430 DEG C, adding a nickel-boron alloy and zirconium into the molten metal, and heating until the nickel-boron alloy and zirconium are completely fused to obtain molten metal; and cooling, freezing the molten metal, and while lowering the temperature to 1360-1380 DEG C and then heating to 1450-1470 DEG C, carrying out steel-tapping pouring. According to the vacuum smelting process disclosed by the invention, the contents of harmful gases and low-melting-point impurities in the molten metal are reduced, the molten alloy is pure, the chemical ingredients of the alloy are uniform, and the comprehensive mechanical properties and quality of the alloy achieve the level of domestic and international high-quality alloys.

Description

technical field [0001] The invention relates to an alloy smelting process, in particular to a vacuum smelting process of a nickel-based alloy containing aluminum, titanium, boron and zirconium. Background technique [0002] In alloys used in aviation, the components generally include several low-melting elements such as aluminum, titanium, boron, and zirconium. When these low-melting point elements are added for alloying treatment, if the timing, temperature, vacuum degree and other factors of addition are not strictly controlled, large burning loss and volatilization will occur, making it difficult to control the chemical composition of the alloy, resulting in waste products. Specifically, when aluminum, titanium, boron, and zirconium are added, the vacuum is too low or the air leakage rate of the equipment is large. A large amount of aluminum, titanium, boron, and zirconium elements will be oxidized and burned, and the composition is difficult to control. When aluminum an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C19/03
CPCC22C1/023C22C1/03
Inventor 刘玉庭李道乾马中钢王光华李娜
Owner SHANDONG ROITIE NEW MATERIAL SCI & TECH
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