一七一章 新型材料的构想
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材质！张岚重重的拍了一下大腿，恍惚间好像大腿上没传来什么感觉，但兴奋起来的张岚没注意到这些：就是发动机的材质！
铸铁发动机有着很多先天性能上面的不足，重量大、散热性差、摩擦系数高等等，其中散热性差事导致汽车自燃的最主要的一个原因！为了解决这个问题，各大汽车厂商都想尽了一切办法来解决这个问题，最简单也是最复杂的一个办法就是采用新型的散热性好的轻量化材料来制作发动机！
之所以说它简单，是因为只要找到合适的材料，制作出来新型的发动机将会在技术上带来巨大的飞跃，但说它困难，又有着其特有的难点，到底那种材料更适合作为发动机的材料呢？能够用来做发动机制作材料的东西不少，但如果再算上合金，那就更多！
技术上比较成熟的材料大概就是后来的铝合金发动机，也就是俗称的全铝发动机，虽然这种发动机依旧有着如耐腐蚀度差、强度低、成本高等等各种各样的缺点，但优点也是很明显的，那就是发动机的重量比铸铁发动机轻了将近一半，同时发动机的散热性能得到了极大的改善！
在全铝发动机上，还从来没有发生过自燃的现象。当然，全铝发动机也不是最好的选择，其较低的最高转速和较低的发动机机体强度使得它并不适合作为高性能发动机的代表。但现阶段来说，从经济性和实用性等各个方面综合考量，它却是最适合作为替代铸铁发动机的新一代产品。
国外汽车巨头们已经开始了全铝发动机的研究，现在国内基本上还没有自主知识产权的发动机，对全铝发动机的研究更是无从谈起，但有一点倒是可以相信，那就是国内的有识之士们已经意识到了这种新型的发动机具有广阔的前景。很可惜，这些有识之士偏偏是说了不算的家伙。
要制造全铝发动机，最关键的就是解决材料的问题和散热问题，最好的超级耐热合金的耐温极限也不能超过去1093摄氏度，钢和铸铁的耐温极限为450摄氏度，而铝合金的耐热极限却只有350摄氏度而已。相对于铸铁发动机，它的耐热极限实在是太低了，这就势必对散热提出了更高的要求。
现在自己的摩托车上采用的发动机，材料依旧是铸铁发动机，即使是相对高端的爱丽丝—杜卡迪（戴安娜mark5），其材料也是铸铁为主，只是为了更加美观，发动机的外壳部件和一些强度温度要求都相对较低的部件上采用了经过抛光的铝合金材质而已，即使如此，这台发动机的重量也相对之前减轻了许多，而且外观经过处理之后比原本的铸铁发动机外观也更加美观，感觉也更加高档。这也是为什么一辆售价高达八万多的摩托车依旧买的供不应求的原因。
国内在金属材料方面走在最前面的大概就要数中科院金属材料研究所了，这里对金属材料的研究水准，就代表了我国金属研究领域的最高水平！
就在张岚想的出神的时候，耳朵忽然疼了起来，感觉好像是被人左三圈右三圈做起了周期的运动。
回过神来的张岚忍住疼使劲斜着眼睛看了看，却赫然发现扭着自己耳朵的不是别人，正是刚才和自己一起美滋滋的吃着大雪糕的莫离烟。
“丫头你疯了？”张岚有点郁闷，这丫头什么时候变得这么野蛮了？“你扭我耳朵干什么？”
“扭你耳朵做什么？”莫离烟一脸的愤怒，“你还好意思问我，我问你，刚才你那么用力的在我腿上拍了一下是什么意思？”说着不自禁的伸手在腿上揉了几下，显然刚才被张岚拍过的地方现在还疼着。
啊？张岚无奈的苦笑，怪不得刚才拍下去的时候没觉得疼呢，自己还没在意，以为是太兴奋给忽略了，原来感情是拍到这丫头腿上去了！
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ps：唉，大大们还有月票没，送桐桐一张行不？
[记住网址龙腾小说ltxsba.com]
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