Method for improving peel strength of sandwich beam by aid of rare earth

Abstract

The invention relates to a method for improving the peel strength of a sandwich beam by the aid of rare earth. The method is used for improving the peel strength of the sandwich beam by means of adding the rare earth into aluminum-base alloy. The method has the particular advantages that 0.3wt.%-1wt.% of mixed light rare earth metal elements are added into the aluminum-base alloy for a porous metal core in a procedure for manufacturing porous aluminum for the porous metal core in order to improve the adhesive strength between the inner surface of rigid skin of the sandwich beam and the surface of the porous metal core, the rare earth reaction kinetic time is controlled from a stirring procedure to a casting procedure, and the activity of the rare earth is kept by the method in the procedures; the rigid skin of the sandwich beam is made of selected seawater-corrosion-resistant Q235 steel, the rare earth and aluminum alloy porous core contains noncombustible perlite ores, and a novel material for preventing energy transmission disconnection can be provided for constructing a vibration attenuation and isolation component or being used as a buoyant raft beam column on the basis of energy absorption for a reciprocating and rotating vibrating machine or vibrating component which has rigorous requirements on corrosion, flame retardance and vibration energy transmission smoothness, is arranged on a ship and can be a fan or a compressor or a diesel-electric unit.

Description

technical field [0001] The invention relates to a method for using rare earths by adding rare earths to an aluminum-based alloy so as to improve the stripping strength of a sandwich beam. In particular, it relates to improving the bonding strength between the inner surface of the rigid skin of the sandwich beam and the surface of the porous metal inner core, and adding light rare earth metal elements to the aluminum base used in the porous metal inner core during the preparation of porous aluminum for the porous metal inner core. Alloys, rare earths are used in the process. Background technique [0002] Sandwich beams (metal porous core sandwich beams) with rigid skin and damping porous metal core, because of their better weldability and durability than rubber steel plates, have been directly used in many fields of vibration reduction and vibration isolation in recent years. Use materials or structures as simple components. Among them, the combination of rectangular square...

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Problems solved by technology

[0015] If you refer to the amount and method of adding rare earth on the hot-dip aluminum plating on the steel surface, the junction interface between the damping inner core of the sandwich beam and the rigid skin, the continuity of the junction interface due to pores is short, the wetting angle of the hole interface and the rigid skin surface In the vibration field, the sandwich beam will inevitably form holes and steel junctions on the perimeter of the circular hole, resulting in infinitely many peeling points, which cannot improve the adhesion between the inner surface of the rigid skin of the sandwich beam and the surface of the porous metal inner core. knot strength purpose

[0016] If rare earths are added with reference to the quantity and method of aluminum alloy structural materials or structural-functional integrated materials that emphasize structural materials, rare earths can improve the strength of aluminum alloys themselves, and improper handling will be a bad thing for the overall performance of sandwich beams; such as the strength of aluminum alloys themselves When the strength of the interface between the damping inner core and the rigid skin is far exceeded, the sandwich beam in the vibration field will inevitably cause the self-peeling of the damping inner core and the rigid skin due to the asymmetry of the strength.

[0017] To sum up, the amount and method of adding rare earths to the above-mentioned hot-dip aluminum or aluminum alloy structural materials or structural-functional integrated materials that emphasize structural materials are directly transplanted into this new material or new component of the sandwich beam. Absurdly ridiculous, even as a comparative document

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