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Dosing method for solving segregation of alloy elements in high temperature alloy

A technology of superalloy and alloying elements, applied in the field of superalloy smelting, which can solve the problems of uneven composition, unstable performance of superalloy products, and poor quality.

Inactive Publication Date: 2015-04-01
XIAN BANGXIN SPECIAL METALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a new batching method for the problems of uneven composition and high-density metal inclusions in the existing high-temperature alloy products, which cause unstable performance and unqualified quality of high-temperature alloy products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: batching method of superalloy GH 3044

[0012] Referring to GB / T 14992-2005 classification and designation of superalloys and intermetallic high temperature materials, the chemical composition (percentage by weight) of superalloy GH3044 is: 23.5~26.5 % Cr, 13.0~16.0 % W, ≤1.5 % Mo, ≤ 4.0 % Fe, 0.30 ~ 0.70 %Ti, ≤0.5% Al, ≤0.50 % Mn, ≤0.8% Si, ≤0.07%Cu , ≤0.10 % C, ≤0.013 % P, ≤0.013 %S, the balance being Ni.

[0013] High temperature alloy melting process:

[0014] 1.1 Material selection: Industrial raw materials are selected from high-quality grades with low impurity content to ensure the least harmful impurity elements brought into the raw materials. The main raw materials are electrolytic nickel (Ni9990), metal chromium (JCr99-A), NiW60, FeMo60-A, TiNi55, AlFe20 and FeSi75Al0.5A.

[0015] 1.2 Ingredients: GH3044 superalloy 500kg vacuum induction furnace ingredients are as follows: electrolytic nickel (Ni9990): 220.80kg; metal chromium (JCr99-A): 128kg;...

Embodiment 2

[0026] Embodiment 2: batching method of superalloy UNS N10276

[0027] Referring to the ASME SB462 standard, the chemical composition (weight percentage) of superalloy UNS N10276 is ≤2.5 %Co, 14.5~16.5% Cr, 15.0~17.0 % Mo, 3.0~4.5 % W, 4.0~7.0%Fe, ≤1.0 %Mn , ≤0.35 %V, ≤0.08 %Si, ≤0.01%C, ≤0.015%P, ≤0.01S, the balance being Ni.

[0028] High temperature alloy melting process:

[0029] 2.1 Material selection: Industrial raw materials are selected from high-quality grades with low impurity content to ensure the least harmful impurity elements brought into the raw materials. The main raw materials are electrolytic nickel (Ni9990), metal chromium (JCr99-A), NiW60, FeMo60-A.

[0030] 2.2 Ingredients: UNS N10276 superalloy 500kg vacuum induction furnace ingredients are as follows: electrolytic nickel (Ni9920): 280.866kg; metal chromium (JCr99-A): 80.810kg; NiW60: 28.334kg; FeMo70: 110.0kg; , C, S, P, etc. as impurity elements only need to control their content. The theoretical val...

Embodiment 3

[0041] Embodiment 3: superalloy Inconel718 batching method

[0042] Referring to the AMS 5662M-2004 standard, the chemical composition (weight percentage) of superalloy Incone718 is 50.0 ~ 55.0%Ni; ≤1.0%Co; 17.0~21.0%Cr; 2.80~3.30%Mo; ~0.80%Al; 0.65~1.15%Ti; ≤0.35%Si; ≤0.35%Mn; ≤0.30%Cu; ≤0.08% C; ≤0.006% B; ≤0.015% P; .

[0043] High temperature alloy melting process:

[0044] 3.1 Material selection: Industrial raw materials are selected from high-quality grades with low impurity content to ensure the least harmful impurity elements brought into the raw materials. The main raw materials are electrolytic nickel (Ni9990), metal chromium (JCr99-A), FeNb50-A, FeMo60-A, TiNi55 and AlFe20.

[0045] 3.2 Ingredients: Superalloy Inconel718 ingredients are as follows: electrolytic nickel (Ni9990): 226.204kg; FeNi40LC: 94.434kg; metal chromium (JCr99-A): 90.410kg; FeMo70: 20.715kg; FeNb50-A: 54.0kg; ; AlFe20: 3.125kg, other elements such as Si, Mn, Cu, C, B, S, P, etc. as impurity ...

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Abstract

The invention provides a dosing method for solving segregation of alloy elements in a high temperature alloy. The method is characterized in that pure metals in high temperature alloy raw materials are totally replaced by intermediate alloys, the granularity of the intermediate alloys is 10-30mm, the content of high-melting-point metals or active metals is between 60 percent and 65 percent, the residual metal refers to nickel or iron, the content of other impurities is simple and does not exceed 0.1 percent, and the sum of the content does not exceed 1.0 percent. According to the method, electrode bars without metallurgical defects (metal segregation) and with uniform components can be obtained, the content of each element in the high-temperature alloy is effectively controlled, and the production cost of the high-temperature alloy is reduced.

Description

technical field [0001] The invention relates to the field of high-temperature alloy smelting, in particular to a batching method for solving quality problems caused by metal segregation in high-temperature alloys. Background technique [0002] Superalloys have good high-temperature strength, oxidation resistance and corrosion resistance, excellent fatigue resistance, creep resistance, fracture toughness and structural stability, and are key materials for the development of aero-engines and various industrial gas turbines. Superalloys are nickel-based, iron-based or cobalt-based alloys containing a certain amount of refractory metals with high melting points such as tungsten, molybdenum, tantalum, and niobium, and a small amount of active metals such as aluminum, titanium, and zirconium. Whether the melting point metal is evenly distributed in the alloy is the key to the qualified production of superalloys. Therefore, the production of superalloys is quite difficult. Taking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C19/05
Inventor 高文红丁旭庞继明高建华王红玲安琪陈隆阳许曼琴
Owner XIAN BANGXIN SPECIAL METALS TECH