Titanium alloy system suitable for additive manufacturing process and part preparation process
A technology of additive manufacturing and preparation technology, which is applied in the field of titanium alloys, can solve problems such as anisotropy of mechanical properties of components, adverse effects of structural load-bearing of additively manufactured components, and adverse effects of structural load-bearing, so as to reduce raw material costs and improve mechanical properties isotropic effect
Active Publication Date: 2022-05-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Therefore, in the process of additive manufacturing of titanium alloy, it is easy to produce the preferred crystal orientation of macroscopic components, which will lead to the anisotropy of the mechanical properties of the components, which will have a significant adverse effect on the structural load.
[0005]
In summary, at present, there are significant columnar grains and crystal preferred orientations in traditional titanium alloy additively manufactured parts, which will have a significant adverse effect on the structural load of additively manufactured parts. How to eliminate columnar grains and preferred crystal orientations has always been an issue. Technical difficulties in the field of titanium alloy additive manufacturing
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Embodiment 1-3
[0056] Taking the 1#, 2#, and 3# alloy compositions in Table 1 as the control targets, three new types of titanium alloy ingots were smelted, and the test blocks were prepared in the order of forging, powder milling, and additive manufacturing. Figure 7 It is the powder morphology of 1# new titanium alloy, Figure 8 Additive manufacturing of 1# titanium alloy test block for laser coaxial powder feeding, Figure 9 High-magnification microstructure and morphology of 1# titanium alloy test block for laser coaxial powder feeding additive manufacturing, Figure 10 Characterization of equiaxed grain morphology and crystal orientation of 1# alloy for laser coaxial powder feeding additive manufacturing. Depend on Figure 9 , Figure 10 It can be seen that the 1# new titanium alloy has an equiaxed grain morphology after additive manufacturing, and the crystal preferred orientation of the entire part is not obvious, and there is no significant β{100} texture. Figure 11 and Figur...
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Abstract
The invention discloses a titanium alloy system suitable for an additive manufacturing process and a part preparation process, and belongs to the technical field of titanium alloys. The titanium alloy comprises the following components in percentage by weight: 1-4% of Al, 3-8% of V, 3-8% of Fe, 0-2% of Ni, 0-2% of Zr and the balance of Ti. The titanium alloy is characterized in that (1) in the additive manufacturing solidification process, elements in the titanium alloy can be enriched at the front end of a liquid-solid interface, so that a liquid phase at the front end of the interface is stable, continuous growth of columnar crystals is inhibited, and equiaxed grains are obtained; and (2) the component manufactured by the titanium alloy additive has a weakened texture, so that the mechanical property of the component is isotropic. Additive manufacturing parts prepared from the titanium alloy have isometric crystals and weakened textures, the bottleneck problems of columnar crystals and mechanical property anisotropy after traditional titanium alloy additive manufacturing are fundamentally solved, and the technology can be widely applied to the technical fields of aviation, aerospace, ocean, weapons and the like.
Description
technical field [0001] The invention relates to the technical field of titanium alloys, in particular to a titanium alloy system and a component preparation process suitable for an additive manufacturing process. Background technique [0002] Titanium alloys have been widely used in aviation, aerospace, ships, land equipment and other fields because of their high specific strength and excellent corrosion resistance. In addition to traditional forging, casting, and machining of titanium alloy parts, the rapidly developing powder additive manufacturing process in recent years provides a potential technical route for the efficient preparation of complex structural titanium alloy parts. However, since the additive manufacturing process is a new process and new technology, the titanium alloys selected by the current additive manufacturing technology are all traditional titanium alloys suitable for forging and casting, such as Ti-6Al-4V (TC4) alloy, Ti-5Al- 5Mo-5V-1Cr-1Fe (TC18) ...
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IPC IPC(8): C22C14/00B22F10/28B33Y10/00B33Y40/20B33Y70/00C22C1/02C22F1/02C22F1/18
CPCC22C14/00C22C1/02C22F1/183C22F1/02B33Y70/00B33Y10/00B33Y40/20Y02P10/25
Inventor 马英杰雷家峰杨锐黄森森邱建科
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI