A kind of preparation method of tc18 titanium alloy small size bar

A TC18 and small-size technology, which is applied in the field of preparation of TC18 titanium alloy small-size rods, can solve the problems of easy cracking of materials, narrow processing window, and increased number of forging fires, so as to improve the yield, shorten the forging cycle, and improve the uniformity sexual effect

Active Publication Date: 2021-05-14
NORTHWESTERN POLYTECHNICAL UNIV +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method evens out its deficiencies. In the stage of forging with a fast forging machine, the surface temperature of the material drops rapidly, the processable window is narrow, and the material is easy to crack. In order to solve the above problems, the forging ratio per fire can only be reduced, which brings The problem is that the number of forging fires increases, and the intangible loss of materials due to heating and grinding is also about 5%-10%, which leads to low production efficiency and high processing costs

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
  • A kind of preparation method of tc18 titanium alloy small size bar
  • A kind of preparation method of tc18 titanium alloy small size bar
  • A kind of preparation method of tc18 titanium alloy small size bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The selected ingot specification is Ф720mm, the phase transition point of the ingot is 865°C, and the unit weight of the blank is 4650kg. According to the technical requirements of the product, the composition of the ingot used in the present invention is shown in Table 1:

[0051] Table 1

[0052] Ti Al Mo V Cr Fe standard requirement 4.4-5.7 4.0-5.5 4.0-5.5 0.5-1.5 0.5-1.5 base 5.30 5.0 4.9 1.0 1.1

[0053] The ingot is heated, the heating temperature is 1150°C, the heating time is 470min~570min, the radial elongation forging is carried out, and the RF100 20MN precision forging machine is used for forging. The deformation process of each pass is as follows: Φ690→Φ610→Φ550→Φ510→Φ470→Φ430 →Φ390→Φ350, cooling in the air after forging, sawing and cutting into three parts.

[0054] The heating temperature is 835°C, the heating time is 230min-280min, and the radial elongation forging is carried out. The equipment adopts RF100 type 2...

Embodiment 2

[0062] The specification of the ingot is Ф720mm, the phase transition point of the ingot is 870°C, and the unit weight of the blank is 4700kg. The chemical composition of the ingot of the present invention is shown in Table 3:

[0063] table 3

[0064]

[0065]

[0066] The heating temperature is 1150°C, the heating time is 470min~570min, the radial elongation forging is carried out, and the RF100 type 20MN precision forging machine is used for forging. The pass deformation process is as follows: Φ690→Φ610→Φ550→Φ510→Φ470→Φ430→Φ390→Φ350 After forging, cool in the air, saw and cut into three equal parts.

[0067] Low-temperature forging, heating temperature 840°C, heating time 230min~280min, radial elongation forging, equipment adopts RF100 type 20MN precision forging machine forging, the process of pass deformation is as follows: Φ350→Φ300→Φ250→Φ200→Φ160, after forging Heat the material back into the furnace.

[0068] After the hot material is returned to the furnace, t...

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
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing TC18 titanium alloy rods with small specifications. The prepared rods are Φ40mm-Φ100mm in size, mainly including: high temperature forging → low temperature forging → high temperature forging → low temperature forging, making full use of the forming characteristics of precision forging equipment Based on the principle of recrystallization, through reasonable design of pass deformation, the uniformity of the core and surface structure of the billet is improved; the surface quality of the material is effectively controlled, the processing flow is halved, the forging finished product rate is greatly increased to 96%, and the shortening is effectively shortened. The processing cycle is reduced, and the processing cost is reduced. In addition, by studying the relationship between the cumulative forging ratio and the material structure refinement and spheroidization, through structure control, it is possible to prepare bars for structural parts with strong crack growth resistance and 3D printing. Milling low-cost rods.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and relates to a method for preparing TC18 titanium alloy small-size rods. Background technique [0002] The nominal composition of TC18 alloy is Ti-5Al-5Mo-5V-1Cr-1Fe, which is a near-β titanium alloy with high strength, high toughness and high hardenability. It is widely used in various structural parts and complex cavities of aviation and aerospace. Components, but the traditional production process is inefficient, the yield is low, and the delivery date is delayed, resulting in poor overall product competitiveness. Therefore, improving the utilization rate of materials and shortening the production cycle has always been a major problem for material processing factories. The present invention mainly considers two kinds of rod preparation methods for use, namely the preparation method of low-cost small-size rods for structural parts, and the preparation method of low-cost ...

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): B21J1/00B21J1/06B21J5/00B21J5/06C22F1/18C21D9/00C22C14/00
CPCB21J1/003B21J1/06B21J5/002B21J5/008B21J5/06C21D9/0075C22C14/00C22F1/183
Inventor 雷锦文崔林林薛祥义李少强王凯旋刘向宏张丰收
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap