A manufacturing method for lateral uniform transition of additively manufactured gradient materials
A gradient material and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of large differences in creep strength in the interface zone, uneven local changes, and reduced component performance.
Active Publication Date: 2022-04-01
天津益普科技发展有限公司
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Problems solved by technology
Although this method can increase the number of cladding layers to make the composition concentration change as smooth as possible, the uneven local changes in the structure and composition of the interface area still lead to a large difference in the creep strength of the interface area; concentrated
It will also be limited by dimensional factors such as the width and height of the component, which will cause the performance of the component to decline
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[0021] The technical solutions of the present invention will be further described below in conjunction with specific embodiments. The twin-filament arc additive manufacturing technology in the additive manufacturing technology is selected to prepare gradient materials with a uniform transition in the lateral direction of the composition concentration gradient. Due to its high forming rate and low equipment cost, arc additive manufacturing technology has its own advantages in the forming of large and complex components. Using TIG as the heat source, the feeding of welding wire and the control of welding are relatively independent systems, so in theory, feeding and forming of multiple welding wires with different components can be carried out, which largely solves the limitation of the type of welding wire on the preparation of gradient materials. At the same time, the use of welding wire reduces the economic cost of expensive powder. Using welding wire as an additive material, ...
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The invention discloses a manufacturing method for additively manufacturing gradient materials with uniform transverse transition. By changing the gradient change direction of the component concentration, the gradient change of the component concentration transitions along the moving direction of the heat source, thereby preparing a gradient material with a smooth and uniform transition of the component concentration gradient. The technical scheme of the invention improves the interface bonding ability of the component, reduces the influence of the thermal expansion coefficient and the creep strength difference on the performance of the component, and prolongs the service life of the component. At the same time, this horizontal transition method is not limited by the size of the components, and can achieve more production applications.
Description
technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a gradient material additive manufacturing technology. Background technique [0002] Gradient material is a new type of composite material composed of two or more materials with continuous gradient changes in composition and structure. It meets the needs of high-tech fields such as the modern aerospace industry. And developed a new type of functional material. Gradient material composition concentration gradient changes include various forms, such as attached figure 1 shown. Among them, the uniform change and smooth transition of the composition concentration gradient from one material to another is the most ideal situation (attached figure 1 b). [0003] There are many traditional methods for the preparation of gradient materials, such as vapor deposition, particle arrangement, and electrodeposition. However, it is difficult to achieve near-net shape of ...
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IPC IPC(8): B23K9/167B23K9/133B23K9/28B23K9/32
Inventor 王志江李天旭胡绳荪王颖
Owner 天津益普科技发展有限公司