汽车新材料(讲解词)_改版.docVIP

New Automobile Materials 1.Overview of normal car materials Proportion of various materails Iron and steel 55％～60％ Cast iron [?ai?n]（铸铁） 5％～12％ Non-ferrous [?fer?s] metals（有色金属） 6％～10% Plastic 8％～12％ Rubber 4％ Glass 3％ Other materials (Paint、liquids ) 6％一12％ 2.Application of new materials These are main new materials used in our products: 1. New metal materials（新金属材料） ① Amorphous [??m?:f?s] Alloys [??l?i]（非晶态合金） ②Shape Memory Alloys（形状记忆合金） 2. Ceramic ?[si?r?mik] materials (陶瓷材料) a. New metal materials 1.1. Amorphous [??m?:f?s] alloys[??l?i]（非晶态合金） It has strong tensile strength, It is used for tyre cord [k?:d] (轮胎帘线), reduce the weight of car’s tyre . Advantages: Good corrosion-resistant [k?r?u??n] ; good wear-resistant; used to make the suspension ?[s??spen??n] spring（悬架弹簧）. 1.2. Shape Memory Alloys（形状记忆合金） The typical shape memory alloys are Ni-Ti alloys , Vehicle Ti50Ni50 always be used to manufacture : ①the fan automatic clutch [kl?t?] ; 风扇自动离合器 ②tire studs [st?d]; 轮胎防滑钉 ③manual transmission ; 手动变速器 ④solenoid [s?ulin?id] valves [v?lv] ; 电磁阀 ⑤ Radiator [?reidi?eit?] gate valves; 散热器护栅活门 b. Ceramic materials Species：It has ordinary ceramics, glass and special ceramics. Features: It can bear high temperature,it has high hardness, brittleness [?britl]. Advantages: ① replace metal material to make the automobile engine and heat exchanger parts; ②special ceramics is used for the production of engine parts or machine; ③improve the thermal ?[?θ?:m?l] efficiency; ④reduce energy consumption; ⑤ reduce the weight of whole car.