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Phase computing method of nickel-base casting alloy

A nickel-based alloy and phase separation calculation technology is applied in the field of phase separation calculation of cast nickel-based alloys, and can solve the problems of inability to achieve quality control of cast nickel-based alloys, no calculation method proposed, and inability to apply cast nickel-based alloys.

Active Publication Date: 2013-09-04
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the book only describes the calculation principle of nickel-based alloy electron vacancies, but does not propose a specific calculation method, which cannot be applied to the actual production of cast nickel-based alloys, nor can it realize the quality control of cast nickel-based alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] Example 1, K77 cast nickel-based alloy phase separation calculation.

[0133] 1. Analyze the chemical composition of K77 cast nickel-based alloy:

[0134] C: 0.05-0.09, measured 0.0850; Mn≤0.15, measured 0; Cr: 14.00-15.25, measured 14.05; Mo: 3.90-4.50, measured 3.91; Co: 14.00-16.00, measured 14.04; Al: 4.00-4.60, measured 4.06; Ti: 3.00-3.70, measured 3.11; B: 0.012-0.020, measured 0.012; Fe: ≤0.50, measured 0.10; Zr: ≤0.040, measured 0; Ni: Yu, measured 60.633. Impurity elements Si, S, P, Cu, Pb, As, Sn, Sb, Bi, Ag are ignored for calculation.

[0135] 2. Determine the initial atomic fraction of each element of K77 cast nickel-based alloy:

[0136] Number of moles:

[0137] C:0.0850 / 12.01; Cr:14.05 / 52.00; Mo:3.91 / 95.94; Co:14.04 / 58.93; Al:4.06 / 26.95; Ti:3.11 / 47.90; B:0.012 / 10.81; 60.633 / 58.71

[0138] Sum of moles:

[0139] 0.0850 / 12.01+14.05 / 52.00+3.91 / 95.94+14.04 / 58.93+4.06 / 26.9+3.11 / 47.90+0.012 / 10.81+0.10 / 55.85+60.633 / 58.71=1.8075

[0140] Initial Atomic F...

Embodiment 2

[0161] Embodiment 2, K23 cast nickel-based alloy phase separation calculation

[0162] 1. Analyze the chemical composition of K23 cast nickel-based alloy:

[0163] C: 0.12-0.18, measured 0.150; Mn≤0.2, measured 0.011; Cr: 14.5-16.5, measured 14.690; Mo: 7.6-9.0, measured 7.600; V: ≤0.25, measured 0; Co: 9.0-10.5, measured 9.240 ; Al: 3.9-4.4, measured 4.130; Ti: 3.4-3.8, measured 3.470; B: 0.004-0.008, measured 0.007; Fe: ≤0.5, measured 0.078; W: ≤0.2, measured 0.037; Nb: ≤0.25, measured 0; Hf: ≤0.25, measured 0.046; Ni: Yu, measured 60.541. The impurity elements Si, S, Pb, Sn, Sb, Bi, As, Ga, Cd, In, Ag, Se, Te, Tl, Zn, Mg are ignored for calculation.

[0164] 2. Determine the initial atomic fraction of each element of K23 cast nickel-based alloy:

[0165] Number of moles:

[0166] C: 0.150 / 12.01; Mn: 0.011 / 54.94; Cr: 14.690 / 52.00; Mo: 7.600 / 95.94; Co: 9.240 / 58.93; Al: 4.130 / 26.95; Ti: 3.470 / 47.90; 0.078 / 55.85; W: 0.037 / 183.85; Hf: 0.046 / 178.49; Ni: 60.541 / 58.71

[0167...

Embodiment 3

[0192] Embodiment 3, K417 casting nickel base alloy phase separation calculation

[0193] 1. Analyze the chemical composition of K417 cast nickel-based alloy:

[0194]C: 0.13-0.22, measured 0.1500; Mn≤0.5, measured 0.0500; Cr: 8.5-9.5, measured 9.5300; Mo: 2.5-3.5, measured 3.0000; V: 0.6-0.9, measured 0.8200; Co: 14-16, measured 15.1400; Al: 4.8-5.7, measured 5.4200; Ti: 4.5-5.0, measured 4.8500; B: 0.012-0.022, measured 0.0140; Fe: ≤1.0, measured 0.1300; W: ≤0.2, measured 0.1000; Nb: ≤0.25, Measured 0.2000; Hf: ≤0.10, measured 0.0600; Ni: Yu, measured 60.5360. The impurity elements Si, S, P, Pb, Sn, Sb, Bi are ignored for calculation.

[0195] 2. Determine the initial atomic fraction of each element of K417 cast nickel-based alloy:

[0196] Number of moles:

[0197] C: 0.15 / 12.01; Mn: 0.05 / 54.94; Cr: 9.53 / 52.00; Mo: 3.0 / 95.94; V: 0.82 / 50.94; Co: 15.14 / 58.93; Al: 5.42 / 26.95; 0.014 / 10.81; Fe:0.13 / 55.85; W:0.1 / 183.85;Nb:0.2 / 92.91;Hf:0.06 / 178.49;Ni:60.536 / 58.71

[0198] Su...

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Abstract

The invention belongs to an alloy quality analyzing technology, and relates to a phase computing method of a nickel-base casting alloy. The method is characterized by comprising the following steps: analyzing chemical components in the nickel-base casting alloy; determining the initial atomic fractions of the components in the nickel-base casting alloy; determining the atomic fractions of the components in the nickel-base casting alloy after forming a boride; determining the atomic fractions of the components in the nickel-base casting alloy after forming a unitary carbide; determining the atomic fractions of the components in the nickel-base casting alloy after forming a complex carbide; determining the atomic fractions of alloy components which can be used for forming gamma'-phases; determining the final atomic fractions of the components in the nickel-base casting alloy; and computing an average electron vacancy number Nv. The method can be finally applied to the actual production of the nickel-base casting alloy, so that the quality control of the nickel-base casting alloy is realized.

Description

technical field [0001] The invention belongs to alloy quality analysis technology, and relates to a phase separation calculation method for cast nickel-based alloys. Background technique [0002] Under high temperature and long-term conditions, casting nickel-based alloys often precipitate harmful topological close-packed (TCP) phases. In order to prevent the formation of such phases and improve the long-term structural stability of the alloy, it is necessary to further study the composition range of the alloy. control. Phase separation calculation refers to an important method to predict and control the formation of TCP phase (mainly σ phase) by calculating the average electron vacancy number Nv of the remaining matrix in the alloy and comparing it with its Nv critical value. When the calculated value of Nv is higher than the critical value of Nv, the alloy forms σ phase; when the calculated value of Nv is lower than the critical value of Nv, the alloy does not form σ phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C19/05
Inventor 张军梁经纬彭颖张玉涛池洪琳刘增社
Owner AECC AVIATION POWER CO LTD