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Method for manufacturing TiAl intermetallic compound through heterogeneous double-wire TOP-TIG electric arc additive manufacturing

A TOP-TIG, intermetallic compound technology, applied in the field of additive manufacturing, can solve the problems of large difference in melting characteristics of titanium alloy welding wire and aluminum welding wire, uneven composition of intermetallic compounds, etc. Out of sync, the effect of improving stability

Active Publication Date: 2020-07-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the obtained intermetallic compound is uneven in composition and structure due to the large difference in melting characteristics between titanium alloy welding wire and aluminum welding wire when the existing arc additive manufacturing process is used to prepare TiAl intermetallic compound, the present invention provides a heterogeneous Method for manufacturing TiAl intermetallic compounds by double-wire TOP-TIG arc additive manufacturing

Method used

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  • Method for manufacturing TiAl intermetallic compound through heterogeneous double-wire TOP-TIG electric arc additive manufacturing
  • Method for manufacturing TiAl intermetallic compound through heterogeneous double-wire TOP-TIG electric arc additive manufacturing
  • Method for manufacturing TiAl intermetallic compound through heterogeneous double-wire TOP-TIG electric arc additive manufacturing

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specific Embodiment approach 1

[0031] Such as figure 1 As shown, the method of this embodiment uses the TOP-TIG welding torch 3 integrated with the second wire feeder 4 to complete additive manufacturing, and also includes the first wire feeder 1 . The design size of the wall component in this embodiment is: 130mm×10mm×30mm, the titanium alloy welding wire used is Ti6Al4V with a diameter of 1.2mm, and the aluminum welding wire is ER1100 with a diameter of 1.2mm. The specific additive manufacturing steps of TiAl intermetallic compound are as follows:

[0032] (1) Select a pure titanium plate as the substrate 7, place the substrate 7 on the heating plate 8, determine the walking path of the TOP-TIG welding torch 3 according to the shape of the required intermetallic compound member, and select a suitable deposition starting point, turn on the heating plate The power supply of 8 preheats the substrate 7, and the temperature of the substrate 7 reaches 450°C and then keeps warm;

[0033] (2) Taking the walking...

specific Embodiment approach 2

[0038] The difference between this specific embodiment and specific embodiment 1 is: the wire feeding speed of the first wire feeder 1 is 800mm / min; All are the same as in Embodiment 1. The TiAl intermetallic compound wall member that this specific embodiment obtains, as Figure 5 As shown, the wall components are intact and without cracks.

specific Embodiment approach 3

[0040] The difference between this specific embodiment and specific embodiment 1 is: the wire feeding speed of the first wire feeder 1 is 800mm / min; All are the same as in Embodiment 1. The TiAl intermetallic compound wall member that this specific embodiment obtains, as Figure 6 As shown, the wall components are intact and without cracks.

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Abstract

The invention discloses a method for manufacturing a TiAl intermetallic compound through heterogeneous double-wire TOP-TIG electric arc additive manufacturing, and belongs to the technical field of additive manufacturing. The method solves the problem that when the TiAl intermetallic compound is prepared through an existing electric arc additive manufacturing process, due to the fact that meltingcharacteristic differences of a titanium alloy welding wire and an aluminum welding wire are large, melting of the two wires is not synchronous under heating of the same electric arc, and the obtainedintermetallic compound is not uniform in component structure. According to the method, by regulating the angles and the positions of the welding wires and the extension length of a tungsten electrode, it is ensured that the heat absorbed by the two heterogeneous welding wires is different under heating of the same electric arc, the welding wires can be under the reasonable heating conditions correspondingly, synchronous continuous melting of the two welding wires is achieved, and a TiAl intermetallic compound component uniform in component structure is obtained. By means of the method, the problem that melting of the heterogeneous double wires is not synchronous when the intermetallic compound is manufactured through existing TIG electric arc additive manufacturing is effectively solved,the intermetallic compound manufacture process interval is widened, and stability of the manufacturing process is improved.

Description

technical field [0001] The invention relates to a method for additively manufacturing TiAl intermetallic compounds with heterogeneous double-wire TOP-TIG arcs, and belongs to the technical field of additive manufacturing. Background technique [0002] An intermetallic compound is a compound that is composed of two or more metal components in proportion and has a crystal structure different from its constituent elements and basic characteristics of the metal. TiAl intermetallic compound has low density, anti-oxidation characteristics and excellent high-temperature mechanical properties, and its corrosion resistance and oxidation resistance are superior to titanium alloys. It is a high-temperature structural material suitable for applications at 600°C-1000°C. Applied in the next generation of high-performance aeroengines. [0003] However, due to the low plasticity of TiAl-based alloys at room temperature, and the elongation after fracture is only 1%-2%, the processing techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/167B23K9/235B23K9/23B23K9/133B33Y10/00B33Y30/00
CPCB23K9/04B23K9/167B23K9/235B23K9/23B23K9/133B33Y10/00B33Y30/00B23K2103/10B23K2103/14
Inventor 蔡笑宇林三宝董博伦范成磊杨春利
Owner HARBIN INST OF TECH
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