金属材料

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3、中文翻译 龙门式起重机金属材料的疲劳强度预测 邮箱 64，邮编 620107，俄 收到 1998年 4月 3日；接受 1998年 9月 29日 摘要 内在的疲劳曲线应用到 龙门式起重机金属材料的 疲劳寿命预测问题。起重机，用于在森林工业中，在伐木林场对各种不同的工作条件进行研究，并且做出相应的应变测量。对载重的循环周期进行计算，下雨循环计数技术得到了使用。在一年内这些起重机运作的样本被观察为了得到运作周期的平均数。疲劳失效分析表明，一些元件的故障是自然的系统因素，并且不能被一些随意的原因所解释。 1999年 留所有权利。 关键词：起重机 。

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5、人教版九年级化学下册,实验活动4金属的物理性质和某些化学性质,本节导读,一、创设情景明确目标,我们的身边哪些物品是由金属材料制成的？你知道它们是由什么金属材料制成的吗？,身边金属大搜索,一、创设情景明确目标,铜,铁,铝,钛,二、自主学习指向目标,自读课本P24,完成学生用书当堂作业部分。,三、合作探究达成目标,探究点一：金属的物理性质,金属材料,合金,纯金属,物理性质,共性,特性,用途。

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8、单元1金属材料和金属冶炼,课时1,学习目标,1.认识金属材料在日常生活和农业生产中的重要作用；2.知道合金的定义，在此基础上初步建立“混合”能改变物质性质的化学观念。,金属材料的发展史,青铜器,铁器,铝器,说一说下列常见的物质都是由哪些金属制成的？,公交车,厨房用品,灯泡,一、用途广泛的金属和合金,金属材料,铁锅,不锈钢锅,金属材料的种类,合金：由一种金属跟其他金属（或非金属）熔合形成的有金属特性。

9、第2课时金属资源的利用和保护,氧气,水蒸气,Fe2O3xH2O,洁净干燥,保护膜,内部结构,不锈钢,腐蚀,回收利用,计划,合理,代用品,铁的锈蚀和保护1.铁生锈实际上是铁与空气中的氧气、水蒸气发生化学反应。2.铁锈很疏松,对内部的铁起不到保护作用。3.防止铁生锈的基本思路是破坏铁生锈的一个或两个条件,即使铁制品隔绝空气或水或将两者同时隔绝。4.对废弃的金属物品进行回收利用的意义主要从两个方面考虑。

10、金属和金属材料,第八单元,章末小结,2,3,4,1,知识网络,知识网络,易错辨别,1铁粉作双吸剂和铁生锈的原理相同。()2要除去铜粉中混有的少量炭粉，可采用在空气中充分灼烧混合物的方法。()3置换反应前后，组成各物质的所有元素的化合价一定不变。()4可以用稀硫酸鉴别黄金和铜。(),易错辨别,5铝在空气中能稳定存在，说明铝的活泼性不强。(。