Piston skirt forge piece for ship and preparation method of piston skirt forge piece

• Main Authors: ZUO DEYUN, LIU XIANDONG, YU FENG, GAO YONGQIANG, ZHU CHAODONG, SHI YU, XIE DENGYU, XU LEI, TONG SHAOJIE, YANG RUIQING
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• Subjects: ALLOYS; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; FERROUS OR NON-FERROUS ALLOYS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The invention relates to a marine piston skirt forge piece and a preparation method thereof, in particular to a marine piston skirt forge piece and a preparation method thereof. The invention aims to solve the problem that the application of the existing high-Si alloy piston skirt forge piece is limited due to the large self-weight of the existing high-Si alloy piston skirt forge piece. The aluminum alloy comprises, by mass, less than or equal to 0.25% of Si, 1.0-1.6% of Fe, 1.8-2.3% of Cu, less than or equal to 0.1% of Mn, 1.3-2.0% of Mg, 0.8-1.3% of Ni, less than or equal to 0.2% of Zn, 0.02-0.10% of Ti and the balance Al. The method comprises the following steps: 1, smelting and casting ingredients, and carrying out electromagnetic stirring and filtering degassing to obtain a cast ingot; secondly, the cast ingot is extruded into a bar, and after high-temperature mold pressing, the bar is naturally cooled to the room temperature to obtain a mold pressing part; and thirdly, the molded part is sequentially su