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A high-purity nickel or superalloy smelting method using pure calcium wire

A technology of nickel-based superalloy and smelting method, applied in the field of high-purity nickel or superalloy smelting and high-purity nickel-based superalloy smelting, can solve problems such as high cost and alloy pollution, and achieve the effects of low cost, reduced smelting cost and reasonable addition process

Active Publication Date: 2019-03-29
辽宁红银金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-purity nickel or high-temperature alloy smelting method using pure calcium wire, adopt vacuum smelting and self-made pure calcium wire method, solve the problem of high cost of using high-purity raw materials, calcium oxide crucibles, and traditional calcium oxide crucibles. The problem of wire-to-superalloy master alloy contamination

Method used

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  • A high-purity nickel or superalloy smelting method using pure calcium wire
  • A high-purity nickel or superalloy smelting method using pure calcium wire
  • A high-purity nickel or superalloy smelting method using pure calcium wire

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Effect test

Embodiment 1

[0027] Pouring 10kg ingot, the ingot material is K417G nickel-based superalloy (composition as shown in Table 1), adopts vacuum induction furnace smelting and common alloy material, and induction furnace adopts magnesia crucible, and distance furnace mouth is 100mm after molten metal melting, The smelting process requires a vacuum of 30Pa. After the metal material is melted, keep the vacuum and boil the molten metal for 10 minutes under the condition of 10Pa, and the temperature is 1500°C. The content can be reduced to 15ppm. Cool down the conjunctiva, when the oxygen content is 10ppm, and the temperature is 1350°C, feed the self-made pure calcium wire into the superalloy melt (the structure of the calcium wire is as follows figure 1 As shown, with pure calcium wire as the inner core, the outer skin adopts pure nickel, the diameter of the self-made pure calcium wire inner core is 6mm, the outer diameter of the outer skin is 12mm, and the outer skin material is a superalloy), ...

Embodiment 2

[0031] Pouring 500kg ingot, the ingot material is K444 nickel-based superalloy (composition as shown in Table 2), adopts vacuum induction furnace smelting and common alloy material, and induction furnace adopts alumina crucible, and the molten metal is 300mm apart from furnace mouth after melting, The smelting process requires a vacuum of 100Pa. After the metal material is melted, the molten metal is boiled for 30 minutes under the condition of vacuum degree of 0.05Pa, and the temperature is 1580°C. The oxygen content can be reduced to 15ppm. To cool down the conjunctiva, when the oxygen content is 8ppm, when the temperature is 1450°C, add Ti, Al and other elements to the superalloy melt, and send it into the self-made pure calcium wire (the structure of the calcium wire is as follows figure 2 As shown, the pure calcium wire is used as the inner core, and the outer skin is made of a hollow rod with the same composition as the smelted high-temperature alloy. The diameter of t...

Embodiment 3

[0036] Pouring 25kg ingot, the ingot material is K417G nickel-based superalloy (composition as shown in Table 1), adopts vacuum induction furnace smelting and common alloy material, and induction furnace adopts magnesia crucible, and the molten metal is 150mm away from furnace mouth after melting, The smelting process requires a vacuum of 10Pa. After the metal material is melted, keep the vacuum and boil the molten metal for 10 minutes under the condition of 5Pa, and the temperature is 1600°C. The content can be reduced to 15ppm. To cool down the conjunctiva, when the oxygen content is 9ppm, the temperature is 1400°C and the self-made pure calcium wire is fed into the superalloy melt (the structure of the calcium wire is as follows figure 1 As shown, with pure calcium wire as the inner core, the outer skin adopts pure nickel, the diameter of the self-made pure calcium wire inner core is 6mm, the outer diameter of the outer skin is 12mm, and the outer skin material is pure nic...

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Abstract

The invention relates to the field of high-temperature alloy smelting, in particular to a high-purity nickel based high-temperature alloy smelting technology, and in particular to a pure-calcium-line-adopted high-purity nickel or high-temperature alloy smelting method. The method includes the following steps that (1) a vacuum induction smelting furnace is adopted for smelting, and vacuum pouring is carried out; (2) metal bath is subject to metal liquid boiling under the vacuum state, and the oxygen content in an alloy is reduced through a carbon oxygen reaction; (3) cooling and film formationare carried out, and a self-made pure calcium line is added; and (4) low temperature stirring and standing are carried out, and then vacuum pouring is carried out. By means of the method, the problemsof silicon increasing and iron pollution on the alloy in the using process of commercial silicon-calcium lines and iron-calcium lines are solved; through structural design of the pure calcium line, the sufficient line feeding depth is guaranteed, spraying and splashing in the using process of the pure calcium line is prevented, the problem about purification of the nickel based high-temperature alloy produced in a large-scale and batched manner is solved, and the smelting cost is reduced; and calcium is adopted for conducting modification on impurities in the high-temperature alloy, the sizeof occluded foreign substance is reduced, the number of the occluded foreign substance in the alloy is decreased, and an effective way is provided for pure smelting of the high-temperature alloy.

Description

Technical field: [0001] The invention relates to the field of high-temperature alloy smelting, especially high-purity nickel-based high-temperature alloy smelting technology, specifically a high-purity nickel or high-temperature alloy smelting method using pure calcium wire. Background technique: [0002] Nickel-based superalloys are key materials for manufacturing hot-end parts of aero-engines, and the performance of nickel-based superalloys plays a key role in aero-engines. However, the performance of nickel-based superalloys mainly depends on the smelting quality of the master alloy, and how to reduce the reduction to obtain high-purity and high-quality nickel-based superalloy master alloys is very important. In addition, the high content of impurity elements in the alloy will form slag inclusions such as oxides and nitrides during the solidification process, which will block the feeding channel of the alloy melt, resulting in microporosity of the cast alloy parts and red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/06C22C19/05
CPCC22C1/023C22C1/06C22C19/056C22C19/058
Inventor 杨彦红仉凤江崔传勇谭明晖侯桂臣金涛孙晓峰
Owner 辽宁红银金属有限公司
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