MCrAlY alloy and preparation method thereof

An alloy, zr1.2 technology, applied in the field of alloys, can solve the problems of wide solidification temperature range, short riser feeding distance, large porosity, etc., achieve the improvement of mechanical properties and oxidation resistance, and prolong the service life of thermal shock cycle , the effect of inhibiting high temperature oxidation

Inactive Publication Date: 2017-07-28
北京普瑞新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the alloy preparation method involved in the patent application number CN201510541909, but the alloy prepared by this method has low density, large porosity, high oxygen content, and high rejection rate; The mouth feeding distance is short. For the slender rod target, it is easy to form shrinkage porosity in the center during ordinary casting and solidification, which affects the quality of the target.

Method used

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  • MCrAlY alloy and preparation method thereof
  • MCrAlY alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of MCrAlY alloy, comprises Co, Ni, Cr, Al, Y, Zr, Si, Ti, Hf and Ta; The parts by weight of each component in the described MCrAlY alloy are as follows:

[0039] 40 parts of Co; 60 parts of Ni; 20 parts of Cr; 12 parts of Al; 0.3 parts of Y; 2 parts of Zr; 0.3 parts of Si; 2 parts of Ti; 0.3 parts of Hf; 2 parts of Ta.

[0040] The preparation method of described MCrAlY alloy comprises the following steps:

[0041] A. Carry out vacuum induction melting of Co, Ni, Cr, Al, Y, Zr, Si, Ti, Hf and Ta elemental substances according to the ratio to obtain alloy melt;

[0042] B. Vacuum casting the alloy melt obtained in step A into a mould. During vacuum casting, the temperature of the alloy melt is 50°C higher than the melting point of the MCrAlY alloy. After cooling, the MCrAlY alloy is obtained. The cooling of the alloy melt rate of 10 2 °C / s.

[0043]In this embodiment, the metallographic grain size of the MCrAlY alloy is below 200 μm.

[0044] After the MCrAlY ...

Embodiment 2

[0046] A kind of MCrAlY alloy, comprises Co, Ni, Cr, Al, Y, Zr, Si, Ti, Hf and Ta; The parts by weight of each component in the described MCrAlY alloy are as follows:

[0047] 60 parts of Co; 40 parts of Ni; 40 parts of Cr; 5 parts of Al; 2 parts of Y; 0.3 parts of Zr; 2 parts of Si; 0.3 parts of Ti; 2 parts of Hf; 0.3 parts of Ta.

[0048] The preparation method of described MCrAlY alloy comprises the following steps:

[0049] A. Carry out vacuum induction melting of Co, Ni, Cr, Al, Y, Zr, Si, Ti, Hf and Ta elemental substances according to the ratio to obtain alloy melt;

[0050] B. Vacuum casting the alloy melt obtained in step A into a mould. During vacuum casting, the temperature of the alloy melt is 80°C higher than the melting point of the MCrAlY alloy. After cooling, the MCrAlY alloy is obtained. The cooling of the alloy melt The rate is 10°C / s.

[0051] In this embodiment, the metallographic grain size of the MCrAlY alloy is below 200 μm.

[0052] After the MCrAlY ...

Embodiment 3

[0054] A kind of MCrAlY alloy, comprises Co, Ni, Cr, Al, Y, Zr, Si, Ti, Hf and Ta; The parts by weight of each component in the described MCrAlY alloy are as follows:

[0055] Co 45 parts; Ni 55 parts; Cr 25 parts; Al 10 parts; Y 0.5 parts; Zr 1.4 parts; Si 0.35 parts; Ti 1.8 parts; Hf 0.5 parts; Ta 1.75 parts.

[0056] The preparation method of described MCrAlY alloy comprises the following steps:

[0057] A. Carry out vacuum induction melting of Co, Ni, Cr, Al, Y, Zr, Si, Ti, Hf and Ta elemental substances according to the ratio to obtain alloy melt;

[0058] B. Vacuum casting the alloy melt obtained in step A into a mould, the temperature of the alloy melt is 1510°C during vacuum casting, and the MCrAlY alloy is obtained after cooling, and the cooling rate of the alloy melt is 10 2 °C / s;

[0059] C. Cut the MCrAlY alloy obtained in step B into a cylinder, and then grind it to obtain an alloy target.

[0060] In this embodiment, the metallographic grain size of the MCrAlY...

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Abstract

The invention provides a MCrAlY alloy and a preparation method thereof. The MCrAlY alloy adds Zr, Si, Ti, Hf and Ta to the existing MCrAlY alloy to improve the mechanical properties and oxidation resistance of the MCrAlY alloy. The preparation method of the MCrAlY alloy uses a combination of vacuum induction melting and vacuum casting technology to obtain an MCrAlY alloy with a relatively uniform and fine microstructure.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a MCrAlY alloy and a preparation method thereof. Background technique [0002] With the development of science and technology, higher requirements are put forward for the comprehensive performance of the turbine engine. In order to improve the thermal cycle performance of the engine and increase the thrust-to-weight ratio, a high turbine inlet temperature is required. When the thrust-to-weight ratio of the engine reaches 20, the gas inlet temperature will reach 2000°C, which has exceeded the temperature that the nickel-based superalloy used to make turbine blades and guide vanes can withstand. Even if intermetallic compound materials are used and directional solidification technology is used, it is difficult to bear. And if the temperature of the turbine blade is lowered by 15°C, its duration will be doubled. Under such circumstances, thermal barrier coatings to resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02B22D18/06
CPCC22C30/00B22D18/06C22C1/02C22C1/023C22C19/058C22C19/07
Inventor 许圣麟
Owner 北京普瑞新材科技有限公司
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