High-temperature alloy material and preparation method thereof

A high-temperature alloy and impurity technology, applied in the application field of alloy materials, can solve the problems of not meeting the performance requirements of turbine blades, short service life of materials, no mechanical properties, etc., and achieve the effects of being suitable for popularization and use, good mechanical fatigue, and improving purity

Inactive Publication Date: 2016-12-21
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the material produced by the current turbine blade preparation method has low strength and no good fracture toughness. During use, the alloy material produced by the ordinary method has poor temperature resistance and no good mechanical properties. The tensile strength is less than 700Mpa; the yield strength is also less than 320N / mm 2 ;Elongation less than 50%;Creep rupture test at high temperature is less than 103N / mm 2 , the fracture time is short, so that the service life of the material is short, and it cannot meet the performance requirements of the turbine blade

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step A, select C: 0.05%, Cr: 20.5%, Mo: 8.00%, Co: 0.50%, W: 0.20%, Fe, 17.00%, B: 0.001%, and the balance is Ni and unavoidable impurity elements, Weigh the raw materials according to the proportion of the components, put the weighed raw materials in a vacuum induction furnace, and then smelt them. The smelting temperature is 1450-1470°C. During the smelting process, adjust the content of each element to make the weight ratio meet the design requirements. , the solution is poured into a consumable electrode;

[0021] Step B, remelting and refining the consumable electrode obtained in step A, and remelting it into an electroslag ingot;

[0022] Wherein, the remelting is carried out in an electroslag furnace; the slag material used for the electroslag remelting is composed of the following mass percentage components: CaF 2 :70%, Al 2 o 3 : 15%, CaO: 10%, MgO: 5%;

[0023] Step C, heating the electroslag ingot produced in step B to 1170°C-1190°C, and keeping it warm f...

Embodiment 2

[0028] Step A, select C: 0.15%, Cr: 23.00%, Mo: 10.00%, Co: 2.50%, W: 1.00%, Fe, 20.00%, B: 0.010%, and the balance is Ni and unavoidable impurity elements, Weigh the raw materials according to the proportion of the components, put the weighed raw materials in a vacuum induction furnace, and then smelt them. The smelting temperature is 1450-1470°C. During the smelting process, adjust the content of each element to make the weight ratio meet the design requirements. , the solution is poured into a consumable electrode;

[0029] Step B, remelting and refining the consumable electrode obtained in step A, and remelting it into an electroslag ingot;

[0030] Wherein, the remelting is carried out in an electroslag furnace; the slag material used for the electroslag remelting is composed of the following mass percentage components: CaF 2 :70%, Al 2 o 3 : 15%, CaO: 10%, MgO: 5%;

[0031] Step C, heating the electroslag ingot produced in step B to 1170°C-1190°C, and keeping it warm...

Embodiment 3

[0036] Step A, select C: 0.1%, Cr: 22.00%, Mo: 9.00%, Co: 2.0%, W: 0.80%, Fe, 19.00%, B: 0.005%, and the balance is Ni and unavoidable impurity elements; Weigh the raw materials according to the proportion of the components, put the weighed raw materials in a vacuum induction furnace, and then smelt them. The smelting temperature is 1450-1470°C. During the smelting process, adjust the content of each element to make the weight ratio meet the design requirements. , the solution is poured into a consumable electrode;

[0037] Step B, remelting and refining the consumable electrode obtained in step A, and remelting it into an electroslag ingot;

[0038] Wherein, the remelting is carried out in an electroslag furnace; the slag material used for the electroslag remelting is composed of the following mass percentage components: CaF 2 :70%, Al 2 o 3 : 15%, CaO: 10%, MgO: 5%;

[0039] Step C, heating the electroslag ingot produced in step B to 1170°C-1190°C, and keeping it warm fo...

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Abstract

The invention discloses a high-temperature alloy material and a preparation method thereof, comprising C: 0.05-0.15%, Cr: 20.5-23.00%, Mo: 8.00-10.00%, Co: 0.50-2.50%, W: 0.20 to 1.00%, Fe, 17.00 to 20.00%, B: 0.001 to 0.010%, the balance being Ni and unavoidable impurities. The high-temperature alloy prepared by the invention has a uniform structure, and the slag material used for electroslag remelting is processed with a reasonable ratio to improve the purity of the material, so that the plasticity and impact toughness of the alloy material are enhanced at low temperature, room temperature and high temperature. The amount of deformation and the method of multiple fires are forged into materials, so that the structure of the turbine blade is uniform and has excellent fracture toughness. The alloy material produced by the present invention has a tensile strength σb≥700N/mm at room temperature. 2 ; Yield strength σ0.2≥320N/mm 2 ; Elongation δ5≥50%; High temperature (816±3℃) creep rupture test ≥103N/mm 2 , breaking time ≥ 25h, elongation δ5 ≥ 60%, meeting the performance requirements of turbine blades.

Description

technical field [0001] The invention relates to an alloy material and a preparation method thereof, in particular to a high-temperature alloy material and a preparation method thereof, and belongs to the technical field of alloy material application. Background technique [0002] In the field of aviation technology, among the hot parts of aero-engines, the use conditions of blade materials are the most severe. Turbine blades are the key components of gas turbines. In order to improve the efficiency of the engine, the gas inlet temperature of the turbine must be continuously increased. Generally, the temperature of the blade body is above 650°C, even as high as 980°C, and the temperature of the blade root is also as high as 700°C or above. Moreover, the turbine blades bear the action of aerodynamic force and centrifugal force, resulting in tensile stress and bending stress. At the same time, the high-speed pulse of the gas flow causes the blades to generate vibration stress....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/03
CPCC22C19/055C22C1/023C22C1/03
Inventor 李建雷德江刘永新张华国丁勇
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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