Laser near-net shaping method for metal-ceramic multi-dimensional functionally-graded structural component
A technology of laser near-net shaping and functional gradient, applied in the field of laser near-net shaping, can solve the problems of single functional gradient change dimension and inability to directly form complex structural parts, etc., to achieve continuous change, rich material design options, excellent mechanical and The effect of thermodynamic properties
Active Publication Date: 2015-04-08
DALIAN UNIV OF TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0011] In order to solve the problems in the traditional preparation methods of metal-ceramic multi-dimensional functional gradient structural parts, such as the single dimension of functional gradient change and the inability to directly form complex structural parts, the present invention provides a metal-ceramic multi-dimensional functional structure with high efficiency, high quality and strong processing flexibility. The direct forming method of gradient structural parts can not only realize the multi-dimensional functional gradient change of structural parts, but also adapt to the direct forming of various high melting point materials and complex structural parts
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. figure 1 Shown is a schematic diagram of a laser near-net shaping system for a metal-ceramic multi-dimensional functionally graded structural member. The embodiment of the present invention requires: forming such as figure 2 For a metal-ceramic functionally graded tool shown in the figure, Ti is used for the design of the metal material powder, and TiC is used for the ceramic powder. The 100%-0% gradient transition of TiC material, the material ratio design is shown in Table 1.
[0029] Table 1 Schematic diagram of gradient change design of cermet composition, where the value represents the percentage of TiC volume fraction.
[0030]
[0031] The JK1002 Nd:YAG solid-state continuous laser is used for near-net laser forming of metal and ceramic powders. The specific forming steps are as follows:
[0032] A. According to the requirements, select near-...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a laser near-net shaping method for a metal-ceramic multi-dimensional functionally-graded structural component. According to the laser near-net shaping method for the metal-ceramic multi-dimensional functionally-graded structural component, a laser fast shaping system is used for combining metal powder and ceramic powder, which are used as raw materials and have changeable proportioning rates, to form the multi-dimensional functionally-graded structural component directly. The laser near-net shaping method specifically includes the following steps: firstly, two types or more than two types of metal powder and ceramic powder are dried and respectively placed in different powder barrels of a powder feeding device; secondly, inert gas is used as powder feeding and protecting gas; and lastly, a numerical control program is used for controlling the moving trajectory and the moving speed of a laser machining head and the real-time powder feeding amount of each powder barrel of the powder feeding device, the change of gradients can be realized in a horizontal plane and a vertical plane of a base plate, and therefore the complex multi-dimensional gradient change in the overall space can be realized. On one hand, the laser near-net shaping method for the metal-ceramic multi-dimensional functionally-graded structural component is a direct shaping method, and on the other hand, the laser near-net shaping method is suitable for melting solidification shaping of various high-melting-point materials, and the selection range of the design of functionally-graded materials is expanded.
Description
technical field [0001] The invention relates to a laser near-net shaping method for a metal-ceramic multi-dimensional functionally graded structural part. Background technique [0002] With the rapid development of space technology and energy technology, some special extreme working conditions require that different working parts of the structural parts have different performances, such as the space shuttle engine combustion chamber wall, one side of which is exposed to thousands of degrees of high-temperature gas, requiring The material has excellent heat resistance, while the other side is subjected to cryogenic liquid hydrogen cooling, which requires the material to have good thermal conductivity and mechanical properties. Homogeneous materials such as traditional heat-resistant metals, ceramics or cermets are difficult to withstand such extreme working conditions. If coating technology is used, thermal stress is easily generated due to the mismatch of thermal expansion c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105
Inventor 吴东江牛方勇马广义郭东明
Owner DALIAN UNIV OF TECH