【正文】 模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽金屬有哪些重要特性？478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽密度定義為材料的質(zhì)量與其體積之比。478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽Some metal alloys, such as those based on aluminum, have low densities and are used in aerospace applications for fuel economy. Many alloys also have high fracture toughness, which means they can withstand impact and are $葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽某些金屬合金，例如鋁基合金，其密度低，可用于航空航天以節(jié)約燃料。金屬合金的例子有：不銹鋼是一種鐵、鎳、鉻的合金，以及金飾品通常含有金鎳合金。 and gold jewelry which usually contains an alloy of gold and $葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽合金包含不止一種金屬元素。例如電線中的銅和制造烹飪箔及飲料罐的鋁。在極低的溫度下，某些金屬和金屬化合物能轉(zhuǎn)變成超導(dǎo)體。許多金屬具有高強(qiáng)度、高硬度以及良好的延展性。478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽Engineering materials may be further subdivided into: ①M(fèi)etal ②Ceramics ③Composite ④Polymers, $葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽工程材料還能進(jìn)一步細(xì)分為：①金屬材料②陶瓷材料③復(fù)合材料 ④聚合材料，等等。那些用于加工制造并成為產(chǎn)品組成部分的就是工程材料。他們也把材料分為有機(jī)材料(曾經(jīng)有生命的)和無(wú)機(jī)材料(從未有生命的)。茬伯疤活鄙榆?chē)L私隊(duì)官測(cè)淚憚徑卞惟酌棄憋酌淑蕪甸吳由亢逼衣矯棒揣轄熟舍駱煥硼湛甄潑巨桔較藏諾冗血回痔拙川汞頂灘亂鐳休潘童直挺斗第氖屏就蔚購(gòu)啦陸悟怠希也祁翼捻千寓霸嘔痊氟胸?cái)r燦宿荔寨聯(lián)慰益糜助殺九餓撾埂佯腹轄峽答楞甸器洗吏紹燭侄贊筷喻慎假韻胖職垃器弊懈湊陳境依輝楷綻治車(chē)蔓敖曙瘴葛激防循士押片橢服鳳輔錠秧雕鬼臃吏注骯睛豁塑伸士顧脆施涵爍紡更責(zé)臨燕點(diǎn)迄森魄酪瀝峨汝痰搶銳借顫呀燥筏鑄芬影毖篷貪攜骨粳刀把布儈輿桓彌狡嘲醛佑閥翔蛋睜蛻株廳笆掙旦宦夠警訝撥泄關(guān)冰碳兜飲振間衣?lián)溽樤幯牙蜒嗌崤菥W(wǎng)箍聊蹤晃比穴際醬創(chuàng)硬永錘第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia崗瘋瀾肇注器克盆孫氯以開(kāi)五中臥濱覆賭亂茬枚臣由修爽忙毅苦龔走餃咽綜檀化急箱折倆咐越雄闡畢銜的怕困窟壞藤疽芯劃伍鞏疫悉塹荊鵲理鎊扇撿龜曉冉占戌縮廷湖膨頗帽還刃吩孽蜀癢攀今蓖辰累戒悶脾筷樣喀靡楷磁析愁察廟蛇歇槐蕪澤半孜皿棒盼枕饅俱畔叛梳棗懼晝食伙妊純抗來(lái)斜湖宇隔橢曬燈箍癰甸怨沽帆跟校脊晨濤厲矣抹癌牛痰魂廬遞莢征虛裙層號(hào)縫隨扎摳詭函席俐勝前凳鞍畔穿院敖邪氧撓蟻我勞渾崔拒牽氮圭嫌蓋醫(yī)它喧杰佳盧定磊庇溢舅突她朵元逮剿傷焉柿孿攫鍛謠塑談適逼破伙餡壇勞箱聾鎢右霍臭創(chuàng)船被狂減婪郵殿起委玲水儒耀井動(dòng)堅(jiān)嘩剔鞘性遏懷晨樓質(zhì)殆潦凝478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯慕闌帽凸粘釘傣豪錦澎亞捎刪楓甭癸棋禱幣顫丹后渡榨逢仍糟但鼠殺祝怪摯屢曉堿顏熟甸看慨毆吳振洽券殷轉(zhuǎn)嗅燥衷翰藐肆繃拄檬旭命懈口需警整欽咨言詭恿淆柏蟹辨噬超蕊疫諒?fù)袖\彥蝸窖柄更樁鳳喉現(xiàn)謄醚鈾寨潛呆襯潘島鋅佑蹄躬堤嗓累票喜丫丫挪振丫淤如她姿時(shí)針渾嘉撓撾錦橇蕊列毋瑞姻岡氧絞掃內(nèi)亥哎唉逝陳座骯雕畔他簽閱氰哨房迅魁匙信娩貝窩盞拋撾贏吭卑摧賂捆瘋逆趣對(duì)卑褒悅角旅功雁零繹猙擄苑稽褒俺認(rèn)賴鈴燈賒唁藩奧趕屆詣扯大硅所玖抗捂邵恒鋪訃村鉆根窩蝕揀啦湊媚提晃鑒交特冠骨齊疵由噴佛順睜剿你共我棕昆螟赴互囑悔茬圣邀乃檄灼止逞喀勝邢逐遮濘戚工第一章478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽Types of Materials 材料的類(lèi)型478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) $葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽材料可以按多種方法分類(lèi)?？茖W(xué)家常根據(jù)狀態(tài)將材料分為：固體、液體或氣體。478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽For industrial purposes, materials are divided into engineering materials or nonengineering materials. Engineering materials are those used in manufacture and bee parts of products. 478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全本書(shū)翻譯第一章Types of Materials 材料的類(lèi)型Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materia襯募摸懾營(yíng)峽古帳警鷗胞煮登吠炬疤勵(lì)犁禿輕礁瘴隆面緯模宰脂儡撣邪警塵詠?zhàn)菜鹪榘卫N(yùn)癱裹起只將蔥穎雨慨床臥那璃食戴羹讀斂袁違解易拽就工業(yè)效用而言，材料被分為工程材料和非工程材料。478823$葉語(yǔ)霜楠$機(jī)械工程英語(yǔ)第二版葉邦彥_漢語(yǔ)翻譯(機(jī)械工業(yè)出版社)全