第一百八十三章:最后的工序
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叶青心中暗喜,用笔刷刷写下地址和联系电话。
买了船壳,叶青又回到龙溪滩,继续强电离工业污水处理设备的制造工作。
结果到了五半,叶青电话响了。
一个陌生号码,但声音并不陌生,就是红星造船厂的那位女销售员。
电话里,她声音温柔极了,问叶青今晚有空吗?
她说她想去酒吧里喝酒,可身边又没什么朋友,正好下午刚认识了叶青,感觉挺投缘的。
“很抱歉,你不是我喜欢的类型。”这会儿金属专家,正在进行粉末冶金中,最关键的铸胚步骤,叶青哪愿意跟一个并不合他眼缘的姑娘去约会?
这个拒绝够直接,也够伤人,这位姑娘足足愣怔了七八秒。
“你……你……船壳不送了,你自己找车过来拖吧。”
“随便。”叶青哼笑着挂掉电话。
粉末冶金,这是门听起来非常高大上的冶金技术。
很多人对这个技术比较陌生,金属不是熔成铁水那样冶炼出来的么?
用粉末怎么冶炼?
像陶瓷一样,用金属合金粉末,压铸成成品外形的胚胎,随后送入高温炉内,像烧制陶瓷一样烧制出来。
最早这项技术被用来制造难以融化的金属,比如灯泡中的钨丝。
在各种金属中,钨是最难熔化和挥发的金属。它的熔高达3380度,所以人们就突发奇想,把钨碾磨成粉末,并参入催化剂,铝硅和和氧化钍。
这样不用熬到3380度,只需要1500度就可以烧制出合格的钨丝。
并且粉末冶金有个好处——一体成型。
往往那些硬质合金的加工,能把工程师给为难成苦逼。
而高硬合金,又是制造齿轮的绝好材料,它有很好的耐磨性,和抗损毁性。
通过碾磨,将混合均匀的合金粉末,锻压成合格的胚胎,再送入烧制,就可以得到一个不用上任何车床加工的齿轮。
当然咯~粉末合金的原理简单,可是在实际锻造过程中,对工业技术的要求非常高,尤其是用来锻造胚胎的高精模具。
模具设计不合理,经过压力机锻压出来的胚胎,内部机构就会不均匀,只烧制出来徒有其表的产品。
同样,粉末冶金可以用来烧制金属,也可以烧制非金属。
金属专家现在玩的就是非金属烧制,用石墨与陶瓷粉当主材料,用金刚石粉当粘合剂,混合一定比例的溶剂油和酒精,用刚打造好的混料机做不规则旋转运动混合碾磨,最后经过金属熔炼中心,锻压成磁发生器的外壳胚胎。
锻压的压力越大,材料就会越结实。
金属熔炼中心的锻压压力为一万吨,这个数据已经超过一大票玩的粉末冶金企业。但是金属专家不屑地说,十万吨的锻压压力,才能算的上一个“好!”
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