Effect of surface treatment to inserted ring on Al–Fe bonding layer of aluminium piston with reinforced cast iron ring
来源期刊：中南大学学报(英文版)2014年第8期
论文作者：SUN Lan(孙兰) LI Chang-an(李长案) TU Jing-wen(屠静雯) PENG Ming-cheng(彭明诚)
文章页码：3037 - 3042
Key words：piston; cast iron ring; surface treatment; shot blasting; sand blasting; intermetallic bonding
Abstract: In order to improve the bonding strength between piston alloys and cast iron ring of aluminum piston with reinforced cast iron ring, the different methods of the surface treatments (shot blasting and sand blasting) to the cast iron ring are experimented. The optical micrograph shows that an intermetallic layer and a ligulate shaped structure are formed between piston alloys and cast iron base ring. After sand blasting treatment, the ring surface is non-metal shiny, matte-like and has no obvious pits. The intermetallic layer thickness formed between piston alloys and cast iron is thinner and more equally distributed after sand blasting to the ring. The content of the graphite distributed the interfacial zone after the shot blasting treatment is little. With the increase of time by sand blasting, the hardness starts to slightly descend. The bonding strength of the sample by sand blasting is obviously higher than that by shot blasting and increases from 9.32 MPa to 19.53 MPa.
SUN Lan(孙兰)1, LI Chang-an(李长案)1, TU Jing-wen(屠静雯)1, PENG Ming-cheng(彭明诚)2
(1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China;
2. Chengdu Galaxy Power Co. Ltd. of China, Chengdu 610501, China)
Abstract:In order to improve the bonding strength between piston alloys and cast iron ring of aluminum piston with reinforced cast iron ring, the different methods of the surface treatments (shot blasting and sand blasting) to the cast iron ring are experimented. The optical micrograph shows that an intermetallic layer and a ligulate shaped structure are formed between piston alloys and cast iron base ring. After sand blasting treatment, the ring surface is non-metal shiny, matte-like and has no obvious pits. The intermetallic layer thickness formed between piston alloys and cast iron is thinner and more equally distributed after sand blasting to the ring. The content of the graphite distributed the interfacial zone after the shot blasting treatment is little. With the increase of time by sand blasting, the hardness starts to slightly descend. The bonding strength of the sample by sand blasting is obviously higher than that by shot blasting and increases from 9.32 MPa to 19.53 MPa.
Key words:piston; cast iron ring; surface treatment; shot blasting; sand blasting; intermetallic bonding
