Method for manufacturing aluminum borate crystal whisker enhancement combustor throat embedded ring inner-cooling aluminum piston

Abstract

The invention discloses a method for manufacturing an aluminum borate crystal whisker enhancement combustor throat embedded ring inner-cooling aluminum piston. The method comprises the steps that firstly, an aluminum borate crystal whisker prefabricated piece blank is manufactured with the in-situ growth method, the shape of the blank is close to the final shape, and only one to three millimeters of working allowance is reserved; secondly, the aluminum borate crystal whisker prefabricated piece blank is manufactured into a finished product; thirdly, a ceramic salt core is manufactured; fourthly, the aluminum borate crystal whisker prefabricated piece is preheated; fifthly, after the soluble core is preheated, the aluminum borate crystal whisker prefabricated piece is taken out, and the soluble core is placed into the aluminum borate crystal whisker prefabricated piece and placed into a casting die rapidly; sixthly, an alumetized abrasion resistant cast iron embedded ring is placed into the casting die to be fixed; seventhly, an aluminum alloy solution is poured into the casting die to be pressed and formed; eighthly, a piston blank is heated and machined into a finished product. Crystal whiskers in the aluminum borate crystal whisker prefabricated piece blank formed in an in-situ growth mode are in isotropy, a formed composite material is in isotropy, and the circumferential-direction fatigue crack, caused by isotropy, of original alumina fiber composite materials is avoided.

Description

technical field [0001] The invention relates to a method for manufacturing aluminum borate whisker-enhanced internally cooled aluminum pistons at the throat of combustion chambers, in particular to a method for manufacturing pistons made of aluminum borate whisker prefabricated parts and aluminum borate whisker composite materials. . Background technique [0002] At present, the engines for trucks, construction machinery, railway locomotives and ships are all developing towards high power and high load, the degree of strengthening is constantly increasing, and the emission requirements are becoming more and more stringent. Adding alumina ceramic composite material to the head of the piston of the engine can improve the thermal fatigue performance of the piston throat, but with the further increase of the strengthening degree, due to the alumina fiber prefabricated parts, it is easy to delaminate, and the ceramic composite material has various properties. Anisotropy, so ring...

AI Technical Summary

Problems solved by technology

However, limited by the squeeze casting process, the positioning of the soluble core cannot be achieved through the mold itself

The process of producing ring-mounted pistons with aluminum borate whisker composite internal cooling channel structure by liquid die forging has not been realized

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