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Smelting technique of novel nickel-iron-base high-temperature alloy GH4169D

A technology of GH4169D and GH4169, which is applied in the smelting process of the new nickel-iron-based superalloy GH4169D, can solve problems such as scrapping of steel ingots, fluctuations in the content of Al and Ti in steel ingots, unqualified, etc., and achieve high welding performance, improved metallurgical quality, and good The effect of thermal processing

Inactive Publication Date: 2015-04-29
FUSHUN SPECIAL STEEL SHARES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the smelting of superalloys for aviation abroad generally adopts the triple smelting process, that is, vacuum induction melting + protective atmosphere electroslag remelting + vacuum self-consumption remelting; however, in the process of protective atmosphere electroslag remelting, the burning loss of Al and Ti elements Difficult to control, the selection of slag and smelting parameters is slightly improper, the content of Al and Ti in steel ingots is prone to large fluctuations, or even unqualified, resulting in scrapping of steel ingots

Method used

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  • Smelting technique of novel nickel-iron-base high-temperature alloy GH4169D
  • Smelting technique of novel nickel-iron-base high-temperature alloy GH4169D
  • Smelting technique of novel nickel-iron-base high-temperature alloy GH4169D

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] ⑴ Vacuum induction melting

[0035] a) Full melting temperature: 1535°C;

[0036] b) Refining temperature: 1535°C;

[0037] c) Tapping temperature: 1475°C;

[0038] d) Vacuum degree during full melting period: 30Pa;

[0039] e) Vacuum degree during refining period: 2Pa, keep for 90min.

[0040] The chemical composition of the sensing electrode is shown in Table 1;

[0041] Table 1 %

[0042] C S Si Cr Al Ti Nb 0.031 0.001 0.02 19.01 1.50 0.78 5.52 Mo co Fe W B P Ni 2.83 13.83 9.15 1.22 0.0055 0.0013 margin

[0043] ⑵ Protective atmosphere electroslag remelting

[0044] The slag ratio is CaF 2 :Al 2 o 3 :CaO:TiO 2 =65%: 15%: 15%: 5%;

[0045] Melting speed: 4.0kg / min;

[0046] The chemical composition of the electroslag ingot is shown in Table 2;

[0047] Table 2 %

[0048] Ingot part ...

Embodiment 2

[0057] ⑴ Vacuum induction melting

[0058] a) Full melting temperature: 1540°C;

[0059] b) Refining temperature: 1540°C;

[0060] c) Tapping temperature: 1480°C;

[0061] d) Vacuum degree during full melting period: 30Pa;

[0062] e) Vacuum degree during refining period: 2Pa, keep for 90 min.

[0063] The chemical composition of the sensing electrode is shown in Table 4;

[0064] Table 4 %

[0065] C S Si Cr Al Ti Nb 0.028 0.001 0.03 18.91 1.53 0.75 5.49 Mo co Fe W B P Ni 2.81 13.79 9.18 1.20 0.0060 0.0012 margin

[0066] ⑵ Protective atmosphere electroslag remelting

[0067] The slag ratio is CaF 2 :Al 2 o 3 :CaO:TiO 2 =65%: 15%: 15%: 5%;

[0068] Melting speed: 3.9kg / min;

[0069] The chemical composition of the electroslag ingot is shown in Table 5;

[0070] table 5 %

[0071] Ingot part C S S...

Embodiment 3

[0080] ⑴ Vacuum induction melting

[0081] a) Full melting temperature: 1555°C;

[0082] b) Refining temperature: 1560°C;

[0083] c) Tapping temperature: 1485°C;

[0084] d) Vacuum degree during full melting period: 30Pa;

[0085] e) Vacuum degree during refining period: 2Pa, keep for 90 min.

[0086] The chemical composition of the sensing electrode is shown in Table 7;

[0087] Table 7%

[0088] C S Si Cr Al Ti Nb 0.033 0.001 0.01 19.08 1.50 0.74 5.55 Mo co Fe W B P Ni 2.80 13.75 9.20 1.21 0.0060 0.0013 margin

[0089] ⑵ Protective atmosphere electroslag remelting

[0090] The slag ratio is CaF 2 :Al 2 o 3 :CaO:TiO 2 =65%: 15%: 15%: 5%;

[0091] Melting rate: 3.9kg / min.

[0092] The chemical composition of the electroslag ingot is shown in Table 8;

[0093] table 8%

[0094] Ingot part C S Si Al Ti head 0.032 0.0008 0.04 1....

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Abstract

The invention discloses a smelting technique of a novel nickel-iron-base high-temperature alloy GH4169D, which aims to smelt the novel high-temperature alloy GH4169D consumable ingot which has the advantages of lower raw material cost and favorable hot working properties in industrial production as well as high stability at high temperature. The scheme of the smelting technique is as follows: on the basis of the GH4169 alloy composition, the Fe content is lowered, the sum and proportion of Al and Ti are adjusted, and proper P and B are added; and by adopting a triple (VIM+PESR+VAR) smelting technique, proper slag and technological parameters are selected, and the burning loss of Al and Ti in the protective-atmosphere electroslag smelting process is controlled to obtain the precise contents of Al and Ti. The technique enhances the metallurgical quality of the high-temperature alloy, and fills up the blank of the high-temperature alloy in the aspect of the application temperature between 650 DEG C and 750 DEG C; the GH4169D alloy has the high strength, favorable hot working property and weldability of the GH4169 alloy, and has the high application temperature and other comprehensive properties of the GH4738 alloy; and the GH4169D alloy has long-term stability at 700 DEG C.

Description

technical field [0001] The invention belongs to the field of nickel-iron-based superalloy materials, and in particular relates to a smelting process of a novel nickel-iron-based superalloy GH4169D. Background technique [0002] Due to their excellent comprehensive mechanical properties, oxidation resistance and corrosion resistance, superalloys have become indispensable materials for key components in petrochemical, nuclear energy, aviation, aerospace and other industrial fields that withstand harsh environments such as high temperature, corrosion, and long-term loads. Superalloys generally contain relatively high content of alloying elements, such as Ni, Cr, Mo, W, Co, etc. Most of these alloying elements are strategic alloy resources in my country, and the price of raw materials is relatively high; alloy smelting and thermal processing containing such elements It is very difficult, resulting in a low yield of superalloys. The above are important factors restricting the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02
Inventor 于腾吴贵林潘慧君李连鹏阚志李凤艳潘彦丰张玉春王志刚赵长虹杨玉军陈庆新朱洪涛张晓磊
Owner FUSHUN SPECIAL STEEL SHARES
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