Riveting-assisted rotary friction welding process for dissimilar metal bar and application

An auxiliary rotation and dissimilar metal technology, applied in the field of material processing, can solve the problems of interface radial heat production rate, temperature distribution difference, insufficient interface metallurgical reaction, interface structure and performance unevenness, etc., and achieve the effect of excellent process performance

Active Publication Date: 2022-01-07
SHANDONG UNIV
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Problems solved by technology

[0002] The existing technology shows that although the performance of the welded dissimilar metal joint can be optimized by adjusting the process parameters in the rotational friction welding, due to the difference in the rotational speed of the rotational friction welding in the radial direction, the heat generation rate of the interface in the radial direction , temperature distribution, etc., which further caused the inhomogeneity of the interface structure and properties
Through a large number of tests, it was found that at the center of the joint, since the rotational speed is almost zero, the increase of the interface temperature mainly depends on the heat conduction in the outer high temperature area, so the metallurgical reaction at the interface is extremely insufficient, which is the weak link of the entire joint

Method used

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  • Riveting-assisted rotary friction welding process for dissimilar metal bar and application
  • Riveting-assisted rotary friction welding process for dissimilar metal bar and application
  • Riveting-assisted rotary friction welding process for dissimilar metal bar and application

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Embodiment 1

[0047]The high-quality and high-efficiency connection of aluminum alloy and steel bars with a diameter of 15mm is achieved by using the riveting-assisted inertial friction welding process. The connection strength is significantly higher than that of the aluminum / steel dissimilar metal joints prepared by the conventional friction welding process.

[0048] (1) Bar preparation: The aluminum alloy bar selected for the test is in the 6061-T6 state, and the stainless steel is in the solid solution treatment state of 304 stainless steel. The aluminum alloy rod only uses machining to remove the oxide film on the end face to obtain a flat end face. For steel bars, use a high-precision lathe end face grooving tool to process a cylinder with a height of 1mm and a diameter of about 3.5mm; then replace it with a triangular turning tool, and process grooves with a depth of 0.40mm every 1mm on the side of the cylinder; Finally, remove the oxide film on the end surface of the stud and process...

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Abstract

The invention provides a riveting-assisted rotary friction welding process for preparing a high-strength dissimilar metal bar structure. The riveting-assisted rotary friction welding process is particularly suitable for preparing the dissimilar metal structure with high performance and large hardness difference. According to the method, the process advantages of rotary friction welding can be fully exerted, meanwhile, the interface bonding performance of a central area is improved by utilizing a riveting mode, on the basis that the production cost is not obviously increased, the performance of the composite structure of the dissimilar metal bar can be remarkably improved, and the high-performance dissimilar metal bar structural part can be directly obtained.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a riveting-assisted rotary friction welding process and application of large-difference dissimilar metal bars. Background technique [0002] The existing technology shows that although the performance of the welded dissimilar metal joint can be optimized by adjusting the process parameters in the rotational friction welding, due to the difference in the rotational speed of the rotational friction welding in the radial direction, the heat generation rate of the interface in the radial direction , temperature distribution, etc., which further caused the inhomogeneity of the interface structure and performance. Through a large number of tests, it was found that at the center of the joint, since the rotational speed is almost zero, the increase of the interface temperature mainly depends on the heat conduction in the outer high temperature area, so the metallurgical react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 马宏赵茜秦国梁
Owner SHANDONG UNIV
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