第四百一十八章 铜铁合金大炮（1）
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这是为了保密和知识产权保护了。
孔府酒坊的工艺、配方至今都没有泄露出去，与孔晟的这种保密管理密不可分。
这样一来，火炮研发制造的成本再一次大大降低。与铜相比，铁的价格相对低廉，这种成本就在孔晟的承受范围之内了。以孔晟现在的财力，支持火炮研发，弄出几门成型的火炮成品来，根本没有问题。
在后世这根本不算什么，但在这个时代，孔晟却深知，这堪称一种重大的技术革命。
有了铸造的原材料，孔晟就着手命人按照他亲自绘制的图纸进行火炮铸造了。
铸造法的第一步是制模。
用非常干的楠木或杉木，按照炮体样式，制成炮模。炮模的两头要长出一尺多，做成轴头，轴头上加铁转棍，然后将炮模安置于旋架之上，以便旋转上泥。
炮模做成以后，再将炮耳、炮箍、花头字样的模子安装上去，并且用细罗过了的碳灰把炮模均匀地涂刷一层，干了以后再用上好的胶黄泥和筛过的细沙，二八相掺，调合成泥，并把羊毛抖开，掺到泥里，和匀后作“经”。
泥调好以后，把它涂糊在炮模上，然后将转棍转动，用圆口木荡板，蘸水荡平候干。待干后，照前法再上泥。待上泥到一定厚度后，用粗条铁线，从炮模的头部密缠至尾部，缠完后照刚才的办法再上泥。等上到快达到要求的厚度后，就用指头大的铁条，比照炮模的长短，长的多用，短的少用，均匀地摆放在炮模上作骨架。
随后用1寸宽、5分厚的铁箍，从炮模头部至尾部，均匀地箍在铁条之外。然后再上泥，上完荡匀。等彻底干透后，再将木芯取出，把炭火放进泥模内，一方面是为了烧干泥模，另一方面是为了把炮耳、炮箍及花头字样等件烧化成灰。等冷却后，扫出灰渣，把木模底安放好，再安尾珠。然后再上泥，干了以后，取出木炮模底，再用炭火烧化尾珠，完全冷却后，等着下窑铸造。
与此同时，用铁打制成模心，长短和火炮的内径长度相等，大小是火炮内径的一半，也同样上好泥，干了以后好用。
第二步是安放炮模和模心。要靠简单机械的帮助，先放好炮模，然后再把模心安装在炮模里，将下口塞紧，四周用干土垫好。
第三步是炼料配料。不管是用生铁还是用铜，都要先进行提炼，然后浇铸成三五斤一块的薄片，等着浇入大炉内铸造用。
第四步是浇注。将精炼的铜放入预先用砖砌好的灶池形化铜浇注炉内，然后用大火将铜催化成汁，再逐渐添铜。等到铜汁全部化清，如油如水，上面冒起金花绿焰之时，便引出铜汁，渐渐放入模内，等注满木模，就算浇铸完毕。
第五步是起心。待炮铸成3天内，将模心摇松；到第5天，把模心取出；第8天将土挖开，把炮放倒，两头垫起2尺来高，把模子上的泥打去，扫干净，炮身就铸好了。
第六步是看膛。就是用一定的方法，将炮膛打磨光滑，这是一项非常艰苦细致的工作，数十名工匠轮番上阵昼夜不休也要数日才能完成。
第七步是齐口。炮铸好后，炮口凹凸不平，必须齐口，使炮口齐整光滑。
第八步是鋐膛。将镟刀扦入炮口，把火炮内膛镟得极为光滑。
第九步是钻火门。大炮的位置是否适当，关系到火炮的使用。所以要比照内膛尺寸，紧挨炮底，用粗钻蘸油钻好火门，火门必须与炮底平行，才算合适。
火炮炮身全部加工完毕了，最后把安装在炮车上，就铸造出一门成品火炮。
就在今日，一门清幽幽的铜铁合金加农炮被铸造完成。庄园内，所有的工匠虽然兴奋不已，但实际上却不知道这火炮的真正威力。而没有经过试验发射，也不能断定火炮是否铸造成功了。
孔晟没有轻易下令试射。他决定明日进山，去大山深处进行试射，一旦成功，对于孔晟来说，这将具有改变这个时代格局的惊人力量。
孔晟疲倦地返回长安侯府，这个时候，纪国公主就闯进府中来，直奔他的书房。
纪国公主常来常往是长安侯府的常客，所以下人们也不敢阻拦她。<();
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