Technical method for thinning the solidification structure of aluminium alloy
A technology of solidification structure and process method, applied in the field of refining process of solidification structure of aluminum alloy, can solve the problem of lack of systematic and comprehensive research on pulse current, etc., and achieve the effect of simple production equipment, simple process method, and improved mechanical properties
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0014] The melting and refining process of the aluminum alloy ingredients is as described above. The obtained aluminum alloy mother liquor is inserted into a graphite electrode at 650-750°C, and pulsed direct current is passed through, and the parameters of the pulse current are adjusted. The pulse frequency is 1000Hz, the pulse width is 1 / 10, and the current density is 20A / cm 2 . After natural cooling to room temperature and solidification, the metallographic structure of the aluminum alloy obtained was observed by a metallographic microscope, and it was found that the white part was the primary α-Al phase, showing a granular or rose-shaped mixed form, and the black part was eutectic Tissue, in the form of fine needles and flakes.
[0015] The aluminum alloy treated by the pulse electric field using the method of the present invention can be compared with the traditional conventionally solidified aluminum alloy. Its α-Al phase presents obvious developed dendrites, and altho...
Embodiment 2
[0018] The process is completely the same as that of the first embodiment above, except that the adjusted pulse current parameters are different. In this embodiment, the pulse frequency is 100Hz, the pulse width is 1 / 100, and the current density is 2000A / cm 2 . In this embodiment, a lower pulse frequency is used, and the pulse width is also smaller. However, the refinement effect of the aluminum alloy crystal phase structure is also more obvious. The primary α-Al phase in the white part was observed by metallographic microscope, showing a uniform rosette-shaped and oval-shaped non-dendritic structure; the eutectic structure in the black part was in the shape of fine needles and flakes. Its grain size is 1 / 20-1 / 30 of the grain size of ordinary conventionally solidified aluminum alloys.
Embodiment 3
[0020] The process is completely the same as that of the first embodiment above, except that the adjusted pulse current parameters are different. In this embodiment, the pulse frequency is 200Hz, the pulse width is 1 / 5, and the current density is 10A / cm 2 . This embodiment uses a medium-sized pulse frequency and a large pulse width. However, the refinement effect of the aluminum alloy crystal phase structure is not obvious. However, compared with the metallographic structure of the conventional casting process, it is found that the primary α-Al phase in the white part does not have a coarse dendrite structure; the eutectic structure in the black part still has segregation; its grain size is ordinary The metallographic grain size of the casting process is 1 / 3-1 / 2, and the uniformity is also average.
PUM
Property | Measurement | Unit |
---|---|---|
current density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com