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High-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy and preparation method thereof

A high-temperature anti-oxidation, cobalt-chromium alloy technology, which is applied in the field of metal materials, can solve the problems of increased creep resistance, reduced stacking fault energy, and reduced creep rate, etc., to suppress the formation of pores and oxide inclusions, and good high-temperature oxidation resistance sexual effect

Active Publication Date: 2022-06-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction of stacking fault energy also reduces the creep rate and increases the creep resistance

Method used

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  • High-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy and preparation method thereof
  • High-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy and preparation method thereof
  • High-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of a high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy. The chemical composition of the high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy is: W: 36wt.%, Co: 15wt.%, Cr : 10wt.%, the oxygen content is controlled within 15ppm, and the balance is Ni and inevitable impurities.

[0052] The preparation method comprises the following steps:

[0053] S1, raw material preparation stage

[0054] According to the mass percentage of raw material chemical components in the high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy, the ingredients are batched and weighed. The dosage of deoxidizer C is 0.06wt.% of the quality of the nickel-tungsten-cobalt-chromium alloy to obtain the prepared nickel-tungsten-cobalt alloy Chromium raw material and deoxidizer C;

[0055] S2, vacuum melting stage

[0056] The nickel-tungsten-cobalt-chromium raw...

Embodiment 2

[0065] A method for preparing a high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy, wherein the chemical composition of the high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy is: W: 40wt.%, Co: 18wt.%, Cr : 8wt.%, the oxygen content is controlled within 15ppm, and the balance is Ni and inevitable impurities.

[0066] The preparation method comprises the following steps:

[0067] S1, raw material preparation stage

[0068] According to the high temperature oxidation resistance and high strength nickel-tungsten-cobalt-chromium alloy, the raw material chemical components are batched and weighed according to the mass percentage. The amount of deoxidizer C is 0.07wt.% of the quality of the nickel-tungsten-cobalt-chromium alloy to obtain the prepared nickel-tungsten-cobalt alloy Chromium raw material and deoxidizer C;

[0069] S2, vacuum melting stage

[0070] The nickel-tungsten-cobalt-chromium r...

Embodiment 3

[0079] A method for preparing a high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy, wherein the chemical components of the high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy are: W: 38wt.%, Co: 20wt.%, Cr : 6wt.%, the oxygen content is controlled within 15ppm, and the balance is Ni and inevitable impurities.

[0080] The preparation method comprises the following steps:

[0081] S1, raw material preparation stage

[0082] According to the high temperature oxidation resistance and high strength nickel-tungsten-cobalt-chromium alloy, the raw material chemical composition mass percentage is batched and weighed, and the amount of deoxidizer C is 0.065% of the quality of the nickel-tungsten-cobalt-chromium alloy to obtain the prepared nickel-tungsten-cobalt-chromium raw material. and deoxidizer C;

[0083] S2, vacuum melting stage

[0084] The nickel-tungsten-cobalt-chromium raw material prepared...

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Abstract

The invention discloses a high-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy and a preparation method thereof, and belongs to the technical field of metal materials. The high-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy comprises the following chemical components in percentage by weight: 5-50% of W, 10-20% of Co, 1-10% of Cr, the oxygen content controlled within 15 ppm, and the balance of Ni and inevitable impurities. The preparation method comprises a raw material preparation stage, a vacuum melting stage, a vacuum refining stage and a deoxidation and desulfurization stage. Through selection of the components and the preparation method, the compressive yield strength of the prepared high-temperature anti-oxidation high-strength nickel-tungsten-cobalt-chromium alloy at the temperature of 1000-1200 DEG C is 350-550 MPa, and the oxidation increment of the alloy at the high temperature of 100 h reaches the anti-oxidation level and is close to the complete anti-oxidation level. The method is suitable for a pressure head of a thermal simulation testing machine, a pull rod of a fatigue testing machine, a Hopkinson tension and pressure rod, a high-temperature tensile test clamp and the like.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a high-temperature oxidation-resistant and high-strength nickel-tungsten-cobalt-chromium alloy and a preparation method. Background technique [0002] The thermal simulation testing machine uses the simulated sample as a resistance to directly energize and heat it. The indenter of the thermal simulation testing machine in contact with the simulated sample can be regarded as two heating electrodes, and the simulated sample is used as a heating resistor. Since the simulated sample is in direct contact with the indenter as the heating electrode, the indenter is heated to a certain temperature while the sample is heated. Therefore, the indenter is required to have good electrical conductivity, high temperature strength, hardness and oxidation resistance. At present, the material of the indenter of the thermal simulation testing machine is mostly made of alloy materials with tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C27/04C22C30/00B22D7/00C22C1/02
CPCC22C19/057C22C27/04C22C30/00C22C1/02C22C1/023B22D7/005
Inventor 郑磊张民宇赵鑫
Owner UNIV OF SCI & TECH BEIJING
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