A Titanium-Alloy Electron Beam Welding Method for Reducing Base Metal Dilution Rate

An electron beam welding, titanium-aluminum alloy technology, applied in the direction of electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as solid cracks, poor plasticity of welded joints at room temperature, and reduce the dilution rate of base metals, etc., to achieve welding The seam metal has good plasticity, improves weldability, and relieves the effect of welding residual stress

Inactive Publication Date: 2021-02-26
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of solid crack defects and poor plasticity of welded joints at room temperature in existing titanium-aluminum alloy electron beam welding, the present invention further proposes a titanium-aluminum alloy electron beam welding method that reduces the dilution rate of the base material

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  • A Titanium-Alloy Electron Beam Welding Method for Reducing Base Metal Dilution Rate

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 To illustrate this embodiment, a titanium-aluminum alloy electron beam welding method that reduces the dilution rate of the base metal described in this embodiment includes the following steps:

[0020] Step 1: Cutting the bevel: splicing the welding end faces of the titanium-aluminum alloy plates 2 to be welded together, cutting a Y-shaped bevel at the joint, and the outer dimension of the middle layer 3 is the same as that of the Y-shaped bevel;

[0021] Step 2: Assembly: place the middle layer 3 on the Y-shaped groove, and apply a clamping force on the end face of the titanium-aluminum alloy plate 2 to be welded by a welding fixture;

[0022] Step 3: Set welding parameters: place the assembled workpiece in the vacuum chamber of the electron beam welding machine, and then start vacuuming. When the vacuum degree reaches 5×10 -2 Pa, adjust the welding process parameters of electron beam 1: the acceleration voltage is 5...

specific Embodiment approach 2

[0029] Specific implementation mode two: combination figure 1 To describe this embodiment, the thickness of the titanium-aluminum alloy plate 2 to be welded in step 1 of this embodiment is 2 mm to 3 mm. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

specific Embodiment approach 3

[0030] Specific implementation mode three: combination figure 1 To describe this embodiment, the thickness of the titanium-aluminum alloy plate 2 to be welded in step 1 of this embodiment is 2 mm. The undisclosed technical features in this embodiment are the same as those in the second embodiment.

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Abstract

The invention discloses a titanium-aluminum alloy electron beam welding method capable of reducing a base material dilution rate, relates to the technical field of welding, and solves the problems that existing titanium-aluminum alloy electron beam welding has solid-state crack defects, great base material metal melting quantity and poor welding joint room-temperature plasticity. The welding method comprises the following steps: cutting a groove, wherein a to-be-welded titanium-aluminum alloy board is cut to form a Y-shaped groove; assembling, wherein a middle layer is placed on the Y-shaped groove, and clamping force is applied to the end surface of the to-be-welded titanium-aluminum alloy board through a welding clamp; setting welding parameters, wherein an assembled workpiece is placedin an electron beam welding machine vacuum room, vacuum-pumping is stared to perform, and electron beam welding process parameters are regulated; and welding, wherein electron beam welding is performed on the to-be-welded workpiece after the welding parameters are regulated, the heat of the workpiece is preserved for certain time in the vacuum room after welding is accomplished, and the workpieceis taken out. The titanium-aluminum alloy electron beam welding method is used for welding of a titanium-aluminum alloy.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a titanium-aluminum alloy electron beam welding method that reduces the dilution rate of a parent material. Background technique [0002] With the rapid development of my country's aerospace technology, lightweight plays an increasingly important role in structural design. Under certain harsh service conditions, more stringent requirements are placed on the high temperature, heat resistance and corrosion resistance of materials. Titanium-aluminum alloy has good high-temperature strength, oxidation resistance and creep resistance. It can work stably at a high temperature of 750°C, and its density is only half of that of traditional nickel-based superalloys. It is considered to be the most promising alternative to nickel-based superalloys. Superalloys, new high-temperature structural materials, have attracted extensive attention in the aerospace and automotive industries. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/06B23K15/00
CPCB23K15/0033B23K15/06
Inventor 陈国庆张戈尹乾兴树西柳峻鹏张秉刚
Owner HARBIN INST OF TECH
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