第二百零一章 坩埚炼钢
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忙完了官场上的迎来送往，李植开始研究坩埚炼钢。更多小说ltxsba.com
虽然苏钢的质量不错，达到后世普通钢材的标准，但仍然含有相当的硫和磷，用来做工具钢有些勉强。而且苏钢价格昂贵，一斤苏钢要二两五钱银子，用来制作刺刀导致刺刀成本很高。李植现在有八千把在役步枪和两千把库存步枪，这一万把步枪刺刀的苏钢成本就达到两万五千两银子。如果李植要扩充部队，还要花更多银子买苏钢。
另外李植还需要优质钢材制造燧发枪机的主弹簧和扣簧片。钢材质量是决定这两个弹簧效果的关键，直接决定了步枪的击发率。目前用苏钢制造的步枪击发率在八成多，如果击发率进一步提高，射击的命中率也能得到一定的提高。
最后，好的钢材可以为李植带来巨大的利润。苏钢卖到北方要二两五钱一斤，如果李植以略低的价格出售更好钢材，可以抢夺不少苏钢的市场，利润巨大。
要知道在这个时代，精钢极为稀缺，甚至可以当作等价物使用。一些富裕的家庭都会窖藏储备一些精钢，以备不时之需。如果李植炼出好的钢材，一定会有市场。
李植迫切需要更好更便宜的优质钢材，而十八世纪中期出现的坩埚炼钢无疑是李植可选的唯一方案。这种炼钢法用熟铁做原料，用石墨做坩埚渗碳材料和还原剂，用石灰石做造渣剂，炼出来的钢铁质量很好。这种炼钢法在历史上被使用了一个世纪，直到十九世纪末电弧炉炼钢发明后才被取代。
坩埚炼钢法作为一种十八世纪的技术，还是比较简单的。李植在穿越前研究过一些土法坩埚炼钢方法，现在正好拿来用。
坩埚炼钢的难点在于需要一千六百度的温度，李植找到了蔡怀水，让他负责采购能承受这么高温度的坩埚。
蔡怀水如今一个月月钱四两，已经娶了翠儿做媳妇，上个月刚生下一个大胖儿子。四两银子这年头足以让五口之家过上小康日子，何况蔡怀水在玻璃作坊做窑头还管一日三餐。虽然被父亲赶出了家门，但是他并没有在外面饿死，而是活得有声有色。他如今对自己在范家庄的生活十分满意，对带给他这个生活的李植也相当忠诚。
“蔡怀水，我需要比烧玻璃还高一些温度的坩埚，你知道哪里有吗？”
蔡怀水想了想，说道：“大人，做烧这么高温度的坩埚也是能做的，那便要用黑滑石做坩埚了，这黑滑石矿产不多，做大口饭碗那么大口，四寸深的坩埚要花二两银子，德州那边有人用这样的坩埚烧瓷，那边买得到。”
李植想了想，猜测蔡怀水说的黑滑石大概就是石墨了，说道：“用一半黑滑石，一半粘土做坩埚，是不是能便宜些。”
“那一个坩埚也要一两二、三钱银子。”
李植算了算，觉得蔡怀水说的坩埚起码能装十几斤钢铁，这样算下来坩埚炼钢的成本比买苏钢便宜多了。李植点头说道：“没关系，那你就去联系购买这样的坩埚吧，先买一百个来。要是我用你买的坩埚炼钢炼成了，我赏你二十两银子。”
蔡怀水闻言一喜，说道：“东家借我三个家丁四匹马，两辆马车，我带人去德州买黑滑石坩埚。”
蔡怀水当天就出发往德州去了，六天后用马车运了一百个坩埚回来。
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