Preparation method for IN713C nickel-based high-temperature alloy

A nickel-based superalloy and metal powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as economic losses in catastrophic accidents, affecting the reliability of alloy use and casting yield, and achieve good impact strength, crystallinity, etc. The effect of grain refinement and improvement of mechanical properties

Inactive Publication Date: 2018-07-24
长沙聚众冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the casting defects that are difficult to eliminate in the casting process, such as porosity and pores, especially in the fine-grain casting superalloy process developed in recent years, the pores and defects that appear to ensure the fine grain size of the alloy are more prominent, which seriously affect the alloy. The reliability of use and the yield of castings have caused a considerable number of catastrophic accidents and heavy economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A. Feed preparation: The chemical composition of metal powder is Ni: 70.00wt%, Cr: 16.28wt%, Al: 5.50wt%, Mo: 3.80wt%, Nb: 1.80wt%, Fe:: 0.01wt%, Ti: 1.00wt%, Si: 0.50wt%, Zr: 0.15wt%, C: 0.20wt%, Cu: 0.50wt%, Mn: 0.25wt%, O: 0.01wt%, the average particle size is 11μm, the binder according to The weight fraction is composed of the following raw materials: 80 parts of polyoxymethylene, 10 parts of high-density polyethylene (HDPE), 10 parts of linear low-density polyethylene (LLDPE), 15 parts of polytetrahydrofuran, PE wax, and 1 part of ethylene-vinyl acetate copolymer , 2 parts of dioctyl phthalate, 2 parts of dibutyl phthalate, 1 part of SA, zinc stearate, the feeding process is to mix the above-mentioned metal powder and binder in a mass ratio of 9:1, at 180 ° C Banburying for 3 hours under a protective atmosphere and extrusion granulation to obtain nickel-based superalloy injection molding feed;

[0014] B. Injection molding: Inject the prepared feed material at a t...

Embodiment 2

[0020] A. Feed preparation: The chemical composition of metal powder is Ni: 75.00wt%, Cr: 12.01wt%, Al: 6.00wt%, Mo: 3.80wt%, Nb: 2.0wt%, Fe:: 0.10wt%, Ti: 0.50wt%, Si: 0.30wt%, Zr: 0.15wt%, C: 0.10wt%, Cu: 0.02wt%, Mn: 0.01wt%, O: 0.01wt%, the average particle size is 15μm, the binder according to The weight fraction is composed of the following raw materials: 80 parts of polyoxymethylene, 10 parts of high-density polyethylene (HDPE), 10 parts of linear low-density polyethylene (LLDPE), 5 parts of polytetrahydrofuran, PE wax, and 1 part of ethylene-vinyl acetate copolymer , 2 parts of dioctyl phthalate, 2 parts of dibutyl phthalate, 1 part of SA and zinc stearate. The feeding process is to mix the above-mentioned metal powder and binder in a mass ratio of 9:1, and heat Banburying for 2 hours under a protective atmosphere and extrusion granulation to obtain nickel-based superalloy injection molding feed;

[0021] B. Injection molding: inject the prepared feed material at a te...

Embodiment 3

[0027] A. Feed preparation: The chemical composition of metal powder is Ni: 68.00wt%, Cr: 15.85wt%, Al: 5.58wt%, Mo: 3.9wt%, Nb: 1.92%, Fe: 2.40wt%, Ti: 0.80 wt%, Si: 0.50wt%, Zr: 0.14wt%, C: 0.18wt%, Cu: 0.50wt%, Mn: 0.20wt%, O: 0.03wt%, average particle size 11-15μm, binder According to the weight fraction, it consists of the following raw materials: 85 parts of polyoxymethylene, 7 parts of high-density polyethylene (HDPE), 7 parts of linear low-density polyethylene (LLDPE), 11 parts of polytetrahydrofuran, PE wax, and 1.5 parts of ethylene-vinyl acetate copolymer. parts, 1.5 parts of dioctyl phthalate and dibutyl phthalate, 1.8 parts of SA and zinc stearate. The feeding process is to mix the above-mentioned metal powder and binder in a mass ratio of 9:1. ℃ under a protective atmosphere for 2.5 hours and extrusion pelletization to obtain nickel-based superalloy injection molding feed;

[0028] B. Injection molding: inject the prepared feed material at a temperature of 185°C...

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Abstract

The invention discloses a preparation method for an IN713C nickel-based high-temperature alloy. The preparation method comprises the following steps: A, preparation for feeding materials; B, injectionand molding; C, catalytic degreasing; D, vacuum sintering; E, thermal treatment: performing solid solution heat treatment on a sintered blank in a vacuum heat treatment furnace under the atmosphere of argon at the temperature of 1,100 to 1,200 DEG C for 1 to 3 hours, performing air cooling to room temperature, performing aging thermal treatment at the temperature of 660 to 790 DEG C for 14 to 17.5 hours, and performing air cooling to room temperature. By adopting the method, near-net forming of a complex-shape product can be realized, and machining is reduced. Homopolymerized polyformaldehydein an adopted bonding agent has higher degree of crystallinity, higher mechanical strength and higher impact strength, so that the mechanical performance of the high-temperature alloy is enhanced onthe whole, the density is about 7.70g / cm<3> after heat treatment, the tensile strength is 1,423MPa or more, the hardness is 42HRC or more, and the oxidation resistance is high.

Description

technical field [0001] The invention relates to a preparation method of IN713C nickel-based superalloy. Background technique [0002] Nickel-based superalloy is a metal material with high strength, high toughness and surface stability in special environments such as corrosion and oxidation. Nickel-based superalloys can be roughly divided into deformed superalloys and cast superalloys according to the forming method. Strictly speaking, powder metallurgy belongs to deformed superalloy, but because it is not directly thermally deformed into a material, but is compacted into an alloy ingot by fine powder, which is pressed into an ingot by sintering or hot isostatic pressing, it has light segregation, high composition Uniform; small grains, uniform structure; good thermal processing performance; excellent mechanical properties; simple process, saving raw materials, low cost, etc.; It still has high high temperature strength, hardness, plasticity and toughness, long-term structural...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/04B22F1/00C22F1/10C22F1/02
CPCC22C1/0433C22C19/056C22F1/02C22F1/10B22F1/103B22F1/10
Inventor 卢仁伟李笃信杨忠臣
Owner 长沙聚众冶金科技有限公司
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