【導(dǎo)讀】等專題，規(guī)劃逐課時(shí)44學(xué)時(shí)依序講授工程力學(xué)-靜力。的期刊&發(fā)表的各類專業(yè)科技論文。順利通過國內(nèi)各項(xiàng)英語專業(yè)考試&測驗(yàn)，并大幅提升學(xué)生及格人數(shù)的比例。國家薪火計(jì)劃以及新一輪的科技建設(shè)隊(duì)伍貢獻(xiàn)新的血輪?？假Y料及原文科技雜志，為日后邁入考研及出國留學(xué)之路打下厚實(shí)的基礎(chǔ)。知識與技巧，在授課過程中亦當(dāng)然應(yīng)該有所側(cè)重；科技專業(yè)英語，以及翻譯為中文語句方面的基本理念和直譯技巧；3）應(yīng)該要求學(xué)生更加關(guān)注本課程，除課堂內(nèi)力求理解教材之內(nèi)容外，關(guān)的各種英文版科技期刊與參考文獻(xiàn)。受力圖”，更借此培養(yǎng)學(xué)生的機(jī)械制圖能力。

　　

【正文】 n which molten metal is poured or injected and allowed to solidify in a suitably shaped mold cavity。 during or after cooling, the cast part is removed from the mold and then processed for delivery. ⊙ 熟悉： Casting processes and castmaterial technologies vary from simple to highly plex。 material and process selection depends on the part’s plexity and function, the product’s quality specifications, and the projected cost level. ⊙ 了解： Castings are parts that are made close to their final dimensions by a casting process。 with a history dating back 6,000 years, the various casting processes are in a state of continuous refinement and evolution as technological advances are being made. 教學(xué)重點(diǎn)及難點(diǎn)： ⊙ 重 點(diǎn) ： Introduction to the different kinds of casting processes, at which that includes:1)Sand Casting。 2)Investment Casting。 3)Centrifugal Casting. The understanding of various kinds of variable castmaterial Technologies from simple to highly plex, especially, the Investment Casting, it can be used to make parts that cannot be produced by normal manufacturing techniques, such as turbine blades that have plex shapes, or airplane parts that have to withstand high temperatures. Introduction to the Procedures of the Investment Casting, the mold of Investment Casting process is made by making a pattern using wax or some other material that can be melted away。 and this wax pattern is dipped in refractory slurry, which coats the wax pattern and forms a skin。 waiting this is dried 22 and the process of dipping in the slurry and drying is repeated until a robust thickness is achieved. ⊙ 難 點(diǎn) ： The materials used for the slurry are a mixture of plaster, a binder and powdered silica, a refractory, for low temperature melts。 For higher temperature melts, sillimanite or aluminasilicate is used as a refractory, and silica is used as a binder。 Depending on the fineness of the finish desired additional coatings of sillimanite and ethyl silicate may be applied。 Alloy steels owe their properties to the presence of one or more elements other than carbon, namely nickel, chromium, manganese, molybdenum, tungsten, silicon, vanadium, and copper。 Since their improved physical properties they are used mercially in many ways not possible with carbon steels。 The mold thus produced can be used directly for light castings, or be reinforced by placing it in a larger container and reinforcing it more slurry。 The pour in the preheated mold also ensures that the mold will fill pletely。 Pouring can be done using gravity, pressure or vacuum conditions。 attention must be paid to mold permeability when using pressure, to allow the air to escape as the pour is done. 23 教學(xué)基本內(nèi)容及過程 Introduction to the Investment casting Methods, that is also known as the lost wax process。 this process is one of the oldest manufacturing processes。 the Egyptians used it in the time of the Pharaohs to make gold jewelry (hence the name Investment)。 With respect to this unit: the Acronyms（詞首字母縮略組合詞） amp。 Abbreviation（縮寫詞） will be selected as follows: 1) LASER: Light Amplification by Stimulated Emission of Radiation 2) RADAR: RAdio Detection And Ranging 3) AI: Artificial Intelligence 4) AGV: Automatic Guided Vehicle 5) APT: Automatically Programming Tools more elements other than carbon, namely nickel, chromium , manganese, molybdenum, tungsten, silicon, vanadium, and copper。 Since their improved physical properties they are used mercially in many ways not possible with carbon steels. Introduction to the special elements, which exist within some kind of ceramics materials, other then the mica。 quartz。 glass。 silicon。 porcelain。 china clay。 potter’s earth。 etc. 24 especially, Let’s emphasis to hint the global focus and the treasure of our country: the REE (Rare Earth Element), which will join the hightemperature amp。 lowtemperature superconductive materials, and that was assured to make the third global industrial revolution for the further future. (PhaseⅢ ) Introduction to the different kinds of casting processes, at which that includes: 1)Sand Casting。 2)Investment Casting。 3) Centrifugal Casting. Castings are parts that are made close to their final shapes amp。 dimensions by a casting process。 with a history dating back 6,000 years, the various casting processes are in a state of continuous refinement and evolution as technological amp。 modern advances are being made. Sand casting is used to make large parts (typically iron, but also bronze, brass, aluminum)。 Molten metal is poured into a mold cavity formed out of sand (natural or synthetic)。 the processes of sand casting are discussed in this section, including: patterns, sprues and runners, position of cavity, design considerations, and casting allowance. The cavity in the sand is formed by using a pattern (an approximate duplicate of the real part), which are typically 25 made out of wood, sometimes metal。 The cavity is contained in an aggregate housed in a box called the flask. Core is a sand shape inserted into the mold to produce the internal features of the part such as holes or internal passages at which cores are placed in the cavity to form holes of the desired shapes. In general, typical stages of sand casting operation including: 1) Patterns are made。 these will be the shape used to form the cavity in the sand. 2) Core also may be made at this time。 these cores are made of bonded sand that will be broken out of the cast part after it is plete. 3) Sand is mulled (mixed) thoroughly with additives such as bentonite to increase bonding and overall strength. 4) Sand is formed about the patterns, and gates, runners, risers, vents a