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1、单词：corrosion腐蚀ductile延展ballbearing滚珠轴承malleable可锻的smelt熔炼,精炼intricate复杂的,精巧的combination结合,化合物ferrousalloys铁合金majority多数impurities杂质cementite渗碳体gloss光泽oxygen氧气oxides氧化物pigment颜料varnish清漆porosity气孔,气泡toxicity毒性embalming木乃伊pigiron生铁castiron铸铁slipsystems滑移性structuralmembers结构件wearresis
2、tance耐磨性higherstrength高能量structuralload载荷,负荷powertransmission能量传递装置corrosionresistance抗腐蚀性non-ferrousmetals有色金属animmensefamilyofengineeringmaterials工程材料的大家庭mineralprocessingequipment选矿设备completesolidsolubility完全固溶体翻译题：1.Morethan90%byweightofthemetallicmaterialsusedbyhumanbeingsaref
3、errousalloys.人类所使用的重量超过90%的金属材料是黑色合金。2.Asapracticalmatter,thesealloysfallintotwobroadcategoriesbasedonthecarboninthealloycomposition.作为一个实际问题,这些合金分为两大类基于碳的合金成分。3.Steelgenerallycontainsbetween0.05wand2.0wcarbon.Thecastironsgenerallycontainbetween2.0wand4.5wcarbon.钢铁一般包含0.05w和2.0w碳。铸
4、铁一般包含2.0w和4.5w碳。4.Withinthesteelcategory,weshalldistinguishwhetherornotasignificantamountofalloyingelementsotherthancarbonisused.对于钢的区分，我们要弄清楚的是是否含有有效量的合金元素而不是碳的含量。5.Acompositionof5wtotalnoncarbonadditionswillserveasanarbitraryboundarybetweenlowalloyandhighalloysteels.总非碳添加0.05%的组合
5、将作为任意一个边界之间的低合金和高合金钢。6.Thesealloyadditionsarechosencarefullybecausetheyinvariablybringwiththemsharplyincreasedmaterialcosts.这些合金元素的加入会使材料成本急剧增加，因此要慎重选择。7.Modernindustryneedsconsiderablequantitiesofthismetal,eitherintheformofironorintheformofsteel.现代工业需要相当数量的这种金属,无论是以钢的形式还是铁的形式。8.Mo
6、reover,ironpossessesmagneticproperties,whichhavemadethedevelopmentofelectricalpowerpossible.此外,铁具有磁性,这使电力的发展成为可能。9.Theprocessofsmeltingconsistsofheatingtheoreinablastfurnacewithcokeandlimestone,andreducingittometal.冶炼过程是在有焦炭和石灰石的高炉中加热铁矿石，从而炼成金属。10.Castirondoesnothavethestrengthofst
7、eel.Itisbrittleandmayfractureundertension.铸铁没有钢的强度。它是脆性的并且可能在拉力下断裂。11.wroughtironbehavesdifferentlyfromironwhichcontainsalotofcarbon.锻铁的特性与含有大量碳的铁不同。12.Surfacecoatingaremixturesoffilmformingmaterialspluspigment,solvents,andotheradditives,which,whenappliedtoasurfaceandcuredordried,y
8、ieldathinfilmthatisfunctio
