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

Processing method of tc25 titanium alloy large size bar

A processing method and technology of titanium alloys, applied in metal processing equipment and other directions, can solve problems such as high-density inclusions, and achieve the effects of uniform organization, stable performance, and refined grain structure.

Active Publication Date: 2020-03-17
湖南湘投金天钛业科技股份有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problem that the method of large-scale production of TC25 large-scale rods has not yet appeared in the above-mentioned prior art, and because TC25 titanium alloy contains 1% tungsten (W), tungsten is a metal with a high melting point and high density, and it is easy to form a high-density alloy in the alloy. To solve the problem of inclusions, the purpose of the present invention is to provide a method for processing large-scale rods of TC25 titanium alloy with a diameter of Φ250~Φ400mm. And very stable, suitable for industrial production

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
  • Processing method of tc25 titanium alloy large size bar
  • Processing method of tc25 titanium alloy large size bar
  • Processing method of tc25 titanium alloy large size bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1. Raw material selection: select sponge titanium and AlMoWTi alloy with a particle size of 0.83-12.7mm (W content is 17-20%, particle size is 0.25-3mm), Al-60Mo alloy, Al bean, HZr, Ti-80Sn alloy, Al-10Si alloy, TiO 2 These master alloys are used as raw materials;

[0036] Step 2. Ingot preparation: mix the raw materials according to the element ratio of TC25 in GB / T 3620.1 to prepare consumable electrodes, and use the vacuum consumable smelting method to carry out three vacuum consumable smelting, and the pressure in the stable stage of the last smelting is not It is greater than 5Pa, and a Φ680mm TC25 titanium alloy ingot is obtained, and the β transformation temperature of the ingot is measured to be 1000°C;

[0037] Step 3: Blank Forging

[0038] At the billet forging temperature of 1080°C, the TC25 titanium alloy ingot is first subjected to upsetting and drawing forging for one fire, that is, the heating temperature of the first fire forging is selected to ...

Embodiment 2

[0050]Step 1. Raw material selection: select sponge titanium and AlMoWTi alloy with a particle size of 0.83-12.7mm (W content is 17-20%, particle size is 0.25-3mm), Al-60Mo alloy, Al bean, HZr, Ti-80Sn alloy, Al-10Si alloy, TiO 2 These master alloys are used as raw materials;

[0051] Step 2. Ingot preparation: mix the raw materials according to the element ratio of TC25 in GB / T 3620.1 to prepare consumable electrodes, and use the vacuum consumable smelting method to carry out three vacuum consumable smelting, and the pressure in the stable stage of the last smelting is not Greater than 5Pa, a Φ680mmTC titanium alloy ingot with uniform composition is obtained, and the measured β transformation temperature of the ingot is 1005°C;

[0052] Step 3: Blank Forging

[0053] At the blank forging temperature of 105°C above the β transformation temperature, the TC25 titanium alloy ingot is subjected to 1 heat upsetting and drawing forging, that is, the heating temperature of the 1 he...

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

PropertyMeasurementUnit
phase transition temperatureaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a TC25 titanium alloy large-size rod machining method. The TC25 titanium alloy large-size rod machining method comprises the steps of raw material selecting, casting ingot preparing, cogging and forging, forging at the transformation temperature of beta or above, recrystallization and homogenization heat treatment forging, forging at the transformation temperature of beta or below and finished product forging and obtaining. According to the free forging technology, TC25 titanium alloy large-size rods with the uniform chemical components, the uniform structure and the stable performance can be prepared, and the product quality and the large-scale production stability are improved.

Description

technical field [0001] The invention provides a method for processing large-scale rods of TC25 titanium alloy, which belongs to the technical field of smelting and free forging of titanium alloy materials. Background technique [0002] With the development of advanced material preparation technology and the impact of the energy crisis, the aerospace industry has more and more urgent needs for new engine materials with high strength, high elastic modulus, low density, and high temperature resistance. Therefore, new high-temperature titanium alloys have become in recent years. Research hotspots from all over the world. TC25 titanium alloy is evolved from BT25 titanium alloy in Russia. The nominal composition is Ti-6.5Al-2Mo-1Zr-1Sn-1W-0.2Si. It is an α+β two-phase titanium alloy with an alloy phase transition point of 1000~1040℃ , the alloy has excellent comprehensive properties, and has good high-temperature mechanical properties and thermal stability. It works for 6,000 hou...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J5/06B21J1/06
CPCB21J1/06B21J5/002B21J5/06
Inventor 彭晖宋敏智朱雪峰樊凯
Owner 湖南湘投金天钛业科技股份有限公司