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

A technology of aluminum borate whisker and manufacturing method, which is applied in the field of aluminum borate whisker-enhanced combustion chamber throat inlaid inner cooling aluminum piston manufacturing, which can solve the problems of inability to realize soluble core positioning, unrealized process, etc., and achieve good casting Manufacturability, improved thermal fatigue performance, and high mechanical properties

Active Publication Date: 2014-09-03
BINZHOU BOHAI PISTON CO LTD
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  • Abstract
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  • Claims
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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 pro

Method used

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

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] A method for manufacturing an aluminum borate whisker-enhanced combustion chamber throat-inlaid inner-cooled aluminum piston, which uses an in-situ growth method to manufacture an aluminum borate whisker prefabricated blank, which is then processed by liquid die forging to cast the piston blank and machined it For the finished product of the piston, the specific steps are:

[0034] 1). The aluminum borate whisker preform blank is manufactured by in-situ growth method. The shape of the blank is basically close to the final shape, leaving only 1-3mm machining allowance; the volume fraction of the aluminum borate whisker preform is high, and the volume fraction can reach 20-50%, the strength of the prefabricated part is greater than that of the alumina fiber prefabricated part, and the ceramic salt core can be fixed in the casting mold by cooperatin...

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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...

Claims

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Application Information

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IPC IPC(8): B22D18/02B22D19/14
Inventor 冯增建张国华李怀荣牟俊东李凤民高晓波徐云庆李艳军王建强杜恩民姜新友李建兴
Owner BINZHOU BOHAI PISTON CO LTD
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