Zinc alloy gear shifting fork block for heavy truck gearbox and casting method of zinc alloy gear shifting fork block

The invention discloses a zinc alloy shifting fork block for a heavy truck gearbox and a casting method of the zinc alloy shifting fork block. A zinc alloy comprises, by mass, 22%-30% of Al, 2.0%-2.5% of Cu, 0.02%-0.05% of Mg, 0.1%-0.2% of Mn, Fe and Sn, 0.05%-0.15% of a rare earth alterant and the...

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Bibliographische Detailangaben
Hauptverfasser: GUI WEIMIN, YAN JIANBO, KOU ZHIDA, HE LIANGLIANG, CHEN YOUFENG, ZHANG XIAOJU, HAI XIANYU, WANG YAN
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses a zinc alloy shifting fork block for a heavy truck gearbox and a casting method of the zinc alloy shifting fork block. A zinc alloy comprises, by mass, 22%-30% of Al, 2.0%-2.5% of Cu, 0.02%-0.05% of Mg, 0.1%-0.2% of Mn, Fe and Sn, 0.05%-0.15% of a rare earth alterant and the balance Zn and impurities. Filt; 0.1%, Sn < lt >; and 0.1%. The zinc alloy material is subjected to heat preservation for 20 h at the temperature of 160 DEG C, the decrease value of the hardness of the zinc alloy material is 3-5 HBW, and the abrasion loss of the zinc alloy material in a friction-wear test at the temperature of 160 DEG C is 255-270 mg. The zinc alloy formula is applied to a heavy truck gearbox shifting fork block part, the abrasion resistance of the part is effectively improved, the service life of the part is effectively prolonged, the use temperature of the part is effectively increased, and the use requirement of a shifting fork block under the high-speed and heavy-load working condition is effec