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Heat treatment process method for gas turbine blade prepared from Ni91 alloy

A technology of turbine blades and process methods, applied in the field of material science, can solve problems such as unqualified tensile yield strength of gas turbine blades at room temperature

Active Publication Date: 2022-04-08
WUXI TURBINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a heat treatment process for gas turbine blades prepared by Ni91 alloy, which can solve the problem of room temperature stretching of gas turbine blades prepared by existing common heat treatment processes. Technical issues with high probability of unqualified yield strength

Method used

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  • Heat treatment process method for gas turbine blade prepared from Ni91 alloy
  • Heat treatment process method for gas turbine blade prepared from Ni91 alloy
  • Heat treatment process method for gas turbine blade prepared from Ni91 alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Ni91 alloy prepared by the combustion engine turbine blade raw material φ81 mm Ni91 alloy bar is provided by Fushun Special Steel Co., Ltd.

[0024] The heat treatment process of the combustion engine turbine blade prepared by Ni91 alloy, the heating blank of the combustion engine turbine blade, the blank and the heating die forged the blade, respectively, respectively figure 1 , figure 2 As shown, including the following steps: S1, the forgings are solidified, and the furnace is incorporated at 1150 ° C, the incubation is raised to 1150 ° C, and the heat is hot after 4 h.

[0025] S2, forgings aging, forgings into the furnace temperature of 850 ° C, raised to 850 ° C, heat-pulled after 16 h, after leaving the furnace.

[0026] S3, forgings 2 time, forgings into the furnace temperature of 810 ° C, raised to 810 ° C, heat-pulled after 2 h, after the furnace is broken.

Embodiment 2

[0030] The following Example 2, in Comparative Example 2, the heat treatment target was an unsubstantially unsubstrate, and the longitudinal stretching rod blank of φ13 mm * 75 mm was cut from the radius of the rod of Example 1.

[0031] The thermal treatment process of the combustion engine turbine blade prepared from Ni91 alloy, characterized in that the Ni91 alloy is preheated to the Ni91 alloy prior to forging, the preheating process comprising the steps of:

[0032] S1', solid solution treatment, in the 1080 ° C furnace temperature, raised to 1080 ° C, and then heat insulation after the warming, then air cooling.

[0033] S2', aging treatment, incorporated at 850 ° C in the furnace temperature, raised to 850 ° C, and heat insulation after heating, then air cooling.

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Abstract

The invention provides a heat treatment process method of a gas turbine blade prepared from a Ni91 alloy. The heat treatment process method can solve the technical problem that the room-temperature tensile yield strength of the gas turbine blade prepared by an existing common heat treatment process is high in disqualification probability. The heat treatment process method of the gas turbine blade prepared from the Ni91 alloy is characterized by comprising the following steps: S1, carrying out solution treatment on a forge piece, feeding the forge piece into a furnace at the furnace temperature of 1150 DEG C, heating the forge piece to 1150 DEG C along with the furnace, carrying out heat preservation for 4 hours after the forge piece is completely heated, and carrying out air cooling after the forge piece is discharged from the furnace; s2, the forging is subjected to aging treatment, specifically, the forging enters a furnace at the furnace temperature of 850 DEG C and is heated to 850 DEG C along with the furnace, heat preservation is conducted for 16 h after thorough heating, and air cooling is conducted after discharging; and S3, secondary aging is conducted on the forge piece, the forge piece enters the furnace at the furnace temperature of 810 DEG C and is heated to 810 DEG C along with the furnace, heat preservation is conducted for 2 h after thorough heating, and air cooling is conducted after the forge piece is discharged from the furnace.

Description

Technical field [0001] The present invention belongs to the field of material science and technology, and more particularly to alloy heat treatment processes, and more particularly to the heat treatment process of the combustion engine turbine blade prepared by the Ni91 alloy. Background technique [0002] The Ni91 alloy is a high temperature alloy material, mainly used to make turbine blade forgings, and the chemical composition of the alloy is shown in Table 1. [0003] Table 1 Ni91 alloy chemical composition [0004] [0005] The heat treatment process for Ni91 alloy forgings comprises: (1) solid solution treatment, solid solution temperature is 1150 ° C, the holding time is 4 h, after the furnace is empty, (2) aging treatment, the aging temperature is 850 ° C, the holding time is 16 h, after delivery Empty cool. The room temperature stretching performance of the customer is as follows: tensile strength Rm ≥ 1000 MPa, yield strength RP0.2 ≥ 650 MPa, and the elongation of the...

Claims

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Application Information

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IPC IPC(8): C22F1/10C21D9/00C22C19/05
Inventor 魏丽封嗣虎门若男刘新权尹林苏化冰袁大庆李明李波许海峰
Owner WUXI TURBINE BLADE