第一百一十五章 第一个给你看

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    刘福贵被这话逗得哈哈一笑,拱手道:“张师傅,林兄抬举我了!不过,只要林兄的点子靠谱,我福满楼的银子,管够!”
    他拍着胸脯,豪气干云。
    老张头一听,眼睛一亮,忙道:“林大人,你又有啥新点子?上次你教我们改的水力锤,省了多少力气,这铁厂的产量都翻了一倍!你说吧,这回要弄啥?”
    林凡笑而不答,带着两人走进铁厂深处,指着不远处一堆乌黑的铁矿石,问道:“老张头,这些铁矿石的成色如何?咱们的炉子,能不能炼出更硬的铁?”
    老张头一愣,摸了摸下巴,沉吟道:“林大人,这铁矿石是附近山里挖来的,成色还算不错,炼出来的铁锭也够结实。可要说更硬的铁……这得看你想要多硬?咱们现在的炉子,火候够猛,炼出来的生铁,能打农具,能铸刀剑,可要再硬,怕是得改炉子,或者加点啥东西。”
    林凡点点头,心中已有计较。
    他虽非冶金专家,但前世对钢筋的基本原理略知一二。
    钢筋的关键在于碳含量与淬火工艺,现代钢筋多用低碳钢拉制,韧性与强度兼备。
    而此时的马头县,炼铁技术虽不先进,但有水力驱动,基础条件尚可,稍加改造,未必不能炼出简易钢筋。
    他沉声道:“老张头,我想炼一种新铁,叫‘钢筋’。这东西得比咱们现在的生铁硬,还要韧,不能一折就断。你说说,咱们的炉子,能不能再提提火候?或者,往铁水里加点炭粉,试试看?”
    老张头一听,眼睛瞪得跟铜铃似的:“往铁水里加炭粉?林大人,这……这能行吗?铁水要是掺了杂质,怕是炼出来的铁不结实啊!”
    刘福贵也在一旁插嘴:“是啊,这铁水里加炭粉,咋听着跟做菜似的?不会炼出一堆废铁吧?”
    林凡哈哈一笑,摆手道:“两位别急,这加炭粉可不是瞎掺!铁要变钢,关键就在于控制碳的量。太多了,铁就脆;太少了,又不够硬。我估摸着,咱们得先试几次,找准比例,再加上淬火的法子,保管能炼出好钢筋!”
    老张头半信半疑,但见林凡说得头头是道,也不好反驳,点头道:“林大人,你说咋干就咋干!这炉子的事儿,我老张头熟得很,你说加炭粉,咱就试试!不过,这淬火是啥法子?”
    林凡耐心地解释:“淬火,就是把烧红的铁条快速放进冷水里,让它迅速冷却,这样能让铁更硬。不过,火候和冷却的时机得拿捏好,不然铁条容易裂。咱们先小规模试试,炼几根出来瞧瞧效果。”
    刘福贵在一旁听得云里雾里,但见林凡与老张头讨论得热火朝天,也不好打断,只得掏出小本子,刷刷记录:“炭粉……淬火……钢筋……林兄,你这弄得跟炼仙丹似的,回头这钢筋真做出来,可得让我先瞧瞧!”
    “哈哈,刘兄,放心,第一个给你看!”
    林凡拍拍他的肩膀,转头对老张头道,“老张头,挑几个手艺好的铁匠,明天开始试炼钢筋。炭粉的量,先按一斤铁水加一两炭粉试试,淬火的水温得控制在常温,不能太冷。炼出来的铁条,直径约莫半寸,尽量拉得均匀。”
    老张头连连点头,眼中闪着跃跃欲试的光芒:“林大人,你放心,俺老张头干了一辈子铁匠,这点活儿还难不倒!明天就开炉,保管给你炼出这什么钢筋!”
    林凡满意地点点头,又看向刘福贵:“这钢筋炼出来,接下来就是混凝土的事儿了。这玩意儿需要石灰、沙子、水泥、碎石,按一定比例混在一起,再加上水和钢筋,就能浇筑出又硬又结实的墙和柱子。福满楼要是想盖新楼,少不了这东西!”
    刘福贵一听,眼睛亮得像灯笼:“你是说,这钢筋和混凝土,能让咱们的房子盖得又高又牢?那我福满楼的新分店,非用这法子不可!银子的事儿,你甭操心,我回去就筹!”
    林凡哈哈一笑,拍手道:“好!刘兄有这魄力,马头县的未来,咱们一起干!老张头,铁厂这边你多费心,钢筋炼好了,我再教你怎么配混凝土。咱们一步步来,争取明年开春,盖出马头县第一栋钢筋混凝土的客栈!”
    老张头和刘福贵对视一眼,眼中满是激动。
    老张头拍着胸脯:“林大人,你就瞧好吧!俺老张头拼了这把老骨头,也得把这钢筋给你弄出来!”
    刘福贵也豪气干云:“林兄,福满楼的银子,随你花!这客栈要是盖成了,我请全县的百姓来吃三天火锅!”
    “哈哈,成交!”
    林凡大笑,伸出手,与刘福贵重重一击掌。
    接下来的几天,林凡几乎泡在铁厂里,带着老张头和几个铁匠,反复试验钢筋的炼制。
    炭粉的比例从一两到半两,再到二两,试了不下十次,终于摸索出一套勉强可行的配方。
    淬火工艺也几经调整,水温、冷却时间精确到秒,炼出来的铁条硬度大幅提升,虽比不上现代钢
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