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株洲市双盟有色金属制品有限责任公司是一家集钨合金研发，生产，销售为一体的高科技企业，公司一贯秉承“诚信立业，睿智创新，卓越品质，高效服务”的经营理念，为客户提供从钨合金毛坯到非标异型钨合金深加工产品的一站式服务，公司生产技术处于国内领先、国际先进水平；产品性能优异、质量稳定，替代进口并出口到欧美，东南亚等国家。
　　双盟公司严格控制原料质量，从制粉到烧结拥有当今世界先进的自动化制粉设备、高效球磨、干燥制粒、高精度全自动压力机、等静压设备、脱蜡真空烧结一体炉、压力烧结炉等生产装备，工艺技术流程成熟先进，产品质量稳定可靠，形成了以医疗屏蔽、石油配重、电极材料、渔坠配重为龙头的钨基合金挤压制品、钨基合金材料、硬质合金等产品，及销售国内外顶尖有特色性能钨,钼材料，广泛应用于石油配重，五金、电子、电器、机械、医疗、航天航空等诸多领域。
　　双盟公司拥有自己的加工中心，主要以非标异型钨合金加工为主，
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人们的日常生活离不开金属，高科技新材料的开发和应用也需要金属。日常使用的金属材料多数属于合金，合金具有许多良好的物理、化学或机械性能。（1）生铁和钢的机械性能不同，钢的性能比生铁优越的原因是________。（2）钨广泛应用于拉制灯丝，有“光明使者”的美誉，这是因为钨________。（3）人类最早使用的合金是青铜，青铜的硬度比铜________（填“大”“小”或“相同”）。（4）如图A是金属的一个应用实例，请说出利用了金属的什么物理性质？（答出一点即可）________。图B是两块金属片相互刻画后，在纯铜片上有明显的划痕。该实验探究的目的是什么？________________________。（5）日常使用的金属材料多数属于合金。现有一些合金及其组分的熔点如下，从图中数据可以得出的结论是________。
主讲：冯艳超
评分：4.0分
【思路分析】
合金是指由一种金属和其它金属或非金属熔合而成的具有金属特性的物质，与组成合金的纯金属相比，合金的优点一般有强度好、熔点低、抗腐蚀性更好等.
【解析过程】
生铁和钢的含碳量不同，含碳量越低，韧性越好；灯泡发光，产生大量热，说明钨熔点高；合金的优点远远大于纯金属如：使熔点降低，便于铸造成型、增加某些特殊性能。例如:铝合金，铝合金是纯铝加入一些合金元素制成的，如铝-锰合金、铝-铜合金、铝-铜-镁系硬铝合金、铝-锌-镁-铜系超硬铝合金。铝合金比纯铝具有更好的物理力学性能:易加工、耐久性高、适用范围广、装饰效果好、花色丰富。 合金的硬度大于其组成的金属 .故答案为：（1）含碳量较低，韧性好；（2）熔点高；（3）大；（4）导电性或延展性；比较纯铜和黄铜的硬度大小；（5）合金的熔点比组成金属的熔点都低.
（1）含碳量较低，韧性好；（2）熔点高；（3）大；（4）导电性或延展性；比较纯铜和黄铜的硬度大小；（5）合金的熔点比组成金属的熔点都低
解答本题要充分了解金属的物理性质方面的知识，同时要掌握合金和金属的性质方面的区别与联系，只有这样才能对相关方面的问题做出正确的判断．
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