Unlock instant, AI-driven research and patent intelligence for your innovation.

Forging method capable of eliminating TiAl alloy residual sheet layers

An alloy and residual technology, applied in the field of forging, can solve problems such as unfavorable secondary processing, microstructure change, grain growth, etc., and achieve the effects of eliminating residual lamellar layers, homogenizing the structure, and avoiding inhomogeneity

Inactive Publication Date: 2019-08-02
JIANGSU UNIV OF TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the temperature is too high, the grains will grow significantly, or the microstructure will change significantly, which is not conducive to the subsequent secondary processing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Forging method capable of eliminating TiAl alloy residual sheet layers
  • Forging method capable of eliminating TiAl alloy residual sheet layers
  • Forging method capable of eliminating TiAl alloy residual sheet layers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composition of the TiAl alloy used in this embodiment is Ti-43.5Al-8Nb-0.2B (at.%).

[0022] The specific forging method to eliminate the residual sheet is:

[0023] (1) Put the billet into a resistance furnace and heat it up to 1300°C at a heating rate of 10°C / min, and keep it warm for 1 hour when the temperature reaches 1300°C;

[0024] (2) After the heat preservation finishes, the blank oil is quenched to room temperature;

[0025] (3) Cover the quenched ingot, then put it into a resistance furnace and heat it to 1100°C, keep it warm until the temperature is uniform, take it out for forging, the deformation rate of the forging billet is 10 -3 the s -1 , the total deformation of the forging billet is 65%;

[0026] (4) Air-cool the forged forging to room temperature.

[0027] In order to verify the effectiveness of the forging method in this example, take the same alloy and put it directly into a resistance furnace for forging at 1100 ° C. The microstructure of...

Embodiment 2

[0029] The composition of the TiAl alloy used in this embodiment is Ti-43.5Al-8Nb-0.2B (at.%).

[0030] The specific forging method to eliminate the residual sheet is:

[0031] (1) Put the billet into a resistance furnace and heat it up to 1300°C at a heating rate of 10°C / min, and keep it warm for 1 hour when the temperature reaches 1300°C;

[0032] (2) After the heat preservation finishes, the blank oil is quenched to room temperature;

[0033] (3) Cover the quenched ingot, then put it into a resistance furnace and heat it to 1200°C, keep it warm until the temperature is uniform, take it out for forging, the deformation rate of the forging billet is 10 -3 the s -1 , the total deformation of the forging billet is 65%;

[0034] (4) Air-cool the forged forging to room temperature.

[0035] In order to verify the effectiveness of the forging method in this example, take the same alloy and put it directly into a resistance furnace for forging at 1200 ° C. The microstructure of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of forging, and particularly relates to a forging method capable of eliminating TiAl alloy residual sheet layers. The method comprises the following steps:(1) heating a TiAl alloy to a single-phase region, and preserving the heat; (2) performing quenching treatment on the alloy; (3) heating the alloy to a temperature of 1100-1250 DEG C, forging, and performing air-cooling or recrystallized annealing on a forged piece after forging is ended, wherein a deformation rate of forging blank is 10<-3> to 10<-1>S<-1>. The method can reduce the residual sheet layers to the greatest extent, enables the structure to be uniform, and eliminates non-uniformity of mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging method for eliminating residual TiAl alloy flakes. Background technique [0002] TiAl alloy has low density, high strength ratio, good corrosion resistance, and excellent performance at high temperature, so it is widely used in low-pressure turbine blades and casings on aircraft. [0003] The traditional method of forging TiAl alloy is: heating the billet to a certain temperature, and then forging directly. Due to the brittleness of TiAl alloy itself, it is generally forged by one-way upsetting. However, TiAl alloys are generally composed of lamellar groups with significant anisotropy. Under the condition of unidirectional upsetting, even if the deformation amount is large, a complete recrystallized structure cannot be obtained, resulting in a large amount of TiAl alloy blanks after forging. Clusters of residual lamellae, which cause inhomogeneity in struct...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22F1/18C22F1/04
CPCC22F1/04C22F1/183
Inventor 程亮陈逸张帅今卢雅琳
Owner JIANGSU UNIV OF TECH