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A kind of pulse current assisted titanium-tial composite plate unclad rolling method

A technology of pulse current and composite plate, which is applied in metal rolling, metal rolling, tool manufacturing, etc., can solve the problems of high cost, low strength and plasticity, high rolling temperature and other problems of sheathed hot rolling method, so as to avoid absorption rolling The effect of controlling deformation, improving plastic deformation ability, and improving rolling efficiency

Active Publication Date: 2020-11-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the problems of small size, uneven thickness, large component deviation, low strength and plasticity of the plate prepared by the titanium-TiAl composite plate foil metallurgy method, and the high cost of the sheathed hot rolling method, complicated process, and difficult rolling process. High temperature, the quality and performance of the clad plate need to be further improved, and a pulse current assisted titanium-TiAl clad plate uncoated rolling method is provided

Method used

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  • A kind of pulse current assisted titanium-tial composite plate unclad rolling method
  • A kind of pulse current assisted titanium-tial composite plate unclad rolling method
  • A kind of pulse current assisted titanium-tial composite plate unclad rolling method

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Embodiment 1

[0043] The preparation method of TC4 / Ti-44Al-8Nb-(B, Y) alloy composite plate is as follows:

[0044] Step 1. Titanium alloy sheet preparation:

[0045] a. Melting TC4 (Ti-6Al-4V) titanium alloy by vacuum induction suspension melting method to obtain a cylindrical ingot with a diameter of 100mm and a height of 180mm;

[0046] b. Cut off the riser of the ingot and remove the surface scale, then place the billet in a box-type vacuum heat treatment furnace at 950°C for 30 minutes, and use a hydraulic forging machine to -1 The strain rate of the titanium alloy billet is thickened, and the total deformation is 70%. After the thickening is completed, the billet is placed in a vacuum heat treatment furnace at 400 ° C for 2 hours, and the furnace is cooled;

[0047] c. Remove scale from the pier-thick billet, smooth the surface, cut the core of the forging cake and process it into a standard rectangular block, process chamfering at the front end of the billet deformation, place it in...

Embodiment 2

[0069] The preparation method of BT16 / Ti-43Al-4Nb-2Mo-2V alloy composite plate is as follows:

[0070] Step 1. Titanium alloy sheet preparation:

[0071] a. Melting BT16 (Ti-3Al-4.5V-5Mo) titanium alloy by vacuum induction suspension melting method to obtain a cylindrical ingot with a diameter of 100mm and a height of 180mm;

[0072] b. Cut off the riser of the ingot and remove the surface oxide skin, then place the billet in a box-type vacuum heat treatment furnace at 1000°C for 60 minutes, and use a hydraulic forging machine for 0.05s -1 The strain rate of the titanium alloy billet is thickened, and the total deformation is 80%. After the thickening is completed, the billet is placed in a vacuum heat treatment furnace at 500 ° C for 2 hours, and the furnace is cooled;

[0073] c. Remove scale from the pier-thick billet, smooth the surface, cut the core of the forging cake and process it into a standard rectangular block, process chamfering at the front end of the billet def...

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Abstract

The invention relates to the field of preparation of alloy materials, in particular to a pulse current assisted rolling method of titanium-TiAl composite plate without sheathing; Inhomogeneity, large composition deviation, low strength and plasticity, and the problems of high cost, complex process, high rolling temperature, and clad plate quality and performance need to be further improved to overcome the clad hot rolling method. The specific steps are: 1. Preparation of titanium alloy sheet material; 2. Preparation of TiAl alloy sheet material; 3. Blank assembly without jacket; 4. Pulse current assisted hot rolling; 5. Separation and subsequent processing to obtain titanium-TiAl composite plate. The composite board obtained in the invention has good surface quality, no oxide layer falling off, no cracking at the edge and end, uniform and small board structure, good bonding interface and excellent mechanical properties.

Description

technical field [0001] The invention relates to the field of preparation of alloy materials, in particular to a pulse current assisted rolling method of a titanium-TiAl composite plate without sheathing. Background technique [0002] TiAl alloy (γ-TiAl-based intermetallic compound) is a new type of lightweight high-temperature structural material with high specific strength and specific modulus, good high-temperature creep resistance and oxidation resistance, and its service temperature can reach 850 ° C. Plates have broad application prospects in the aerospace field. However, since TiAl alloy is a difficult thermoplastic deformation material, the thermal processing window is small, the material is prone to instability and cracking during rolling, and the mechanical properties of the sheet at room temperature are poor, and the machining and assembly capabilities are poor, which seriously hinders the development and application of TiAl alloy sheets. Titanium alloy has good h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B1/38B21B3/00B21C37/02B21J5/00B21J5/08
CPCB21B1/466B21B1/38B21B3/00B21C37/02B21J5/002B21J5/08B21B2001/386B21B2003/001B21B15/0007B21B15/0035B22D7/005C22C14/00C22C30/00C22F1/183
Inventor 韩建超贾燚王涛任忠凯刘元铭和东平李莎锅渺
Owner TAIYUAN UNIV OF TECH