Method for manufacturing alumina fiber and titanium oxide particle-reinforced inner-cooling insert ring piston blanks

Abstract

The invention discloses a method for manufacturing alumina fiber and titanium oxide particle-reinforced inner-cooling insert ring piston blanks. The method comprises the following steps: (1) manufacturing an upper fabricated part and a lower fabricated part of alumina ceramic fiber and titanium oxide particles, wherein the volume fraction of alumina ceramic fibers is 8-25 percent, the volume fraction of titanium oxide particles is 1-9 percent, and the rest is gaps; (2) preparing a soluble core by using salt and aluminum titanate ceramics as raw materials; (3) putting a wear resistant cast iron insert ring after aluminum diffusion treatment in a casting mould, and fixing; (4) preheating the upper fabricated part and the lower fabricated part of alumina ceramic fiber and titanium oxide particles; (5) after preheating the soluble core, taking out the upper fabricated part and the lower fabricated part of alumina ceramic fiber and titanium oxide particles, putting the soluble core in the lower fabricated part of alumina ceramic fiber and titanium oxide particles, and then combining the upper fabricated part and the lower fabricated part of alumina ceramic fiber and titanium oxide particles and quickly putting in the mould; (6) pouring an aluminum alloy solution into the casting mould, and carrying out pressure forming.

Description

technical field [0001] The invention relates to a manufacturing method of a piston blank, in particular to a manufacturing method of an aluminum oxide fiber titanium oxide particle reinforced inner cooling insert ring piston blank. 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 fiber and titanium oxide particles to the head of the piston of the engine can greatly improve the thermal fatigue performance of the piston throat, and the internal cooling channel structure can effectively reduce the temperature of the piston head and improve the performance of the engine. The liquid die forging casting process can make the piston structure more dense and the mechanical performance higher. Therefore, combining the t...

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Problems solved by technology

[0004] Chinese patent application CN1943915A discloses a method of casting a piston blank with an internal cooling channel by a liquid squeeze casting process, but: the first CN1943915A technology only uses alumina fiber to reinforce the throat of the combustion chamber, and the stability of the piston at high temperature Poor sex

Its second CN1943915A technology adopts the technology of salt plus corundum, but its strength and stability are relatively poor

Its 3 CN1943915A technology adopts inlaid ring to fix, and fixing effect is poor

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