$floatcFile = "/www/wwwroot/xin_floatAdc.txt"; 大宋有毒(第十个名字)_208 窗外有耳(1 / 2)_大宋有毒最新章节免费阅读无弹窗_新笔趣阁

208 窗外有耳(1 / 2)

筛选完毕之后,尺寸合格的滚珠还不能用,因为它们经过回火之后硬度不够,必须再经过一次淬火,把硬度提高才可以。

这次淬火就是滚珠轴承能不能用的关键,不管前面的工序做的多完美,滚珠一颗颗就和用激光测量般的圆,还大小一致。但达不到硬度,放入轴承里也是白搭,有了负荷之后转不了多少圈就得掉皮。

用多少石灰、多少纯碱、多少木炭粉,都是有比例的。渗碳箱温度多少,保持多久,也是有对应数据的。

没错,这种淬火方式也叫表面渗碳硬化处理,只不过和盔甲比起来,滚珠的渗碳层要更厚一些,最好能完全渗透到中心。

这样的滚珠就是宁碎不扁的,不会因为变形过大而把轴瓦磨坏,一旦扛不住压力,就咔嚓一下碎了。

这一套工序挺复杂吧,洪涛眼睛一翻,撇着嘴说:复杂?靠,我才刚干了一半!

是啊,滚珠处理完了,轴承的内外圈套瓦还得处理呢。白口铁硬是够硬,但太脆了,容易折断。咋办呢?弄个闷炉像烤鸭一样烤,温度够了、保温时间够了、降温速度控制好了,这些白口铸铁会变成黑心铸铁,也叫灰口铸铁。

它的硬度并没太大降低,但韧性和机械加工性都好了很多。而这种烤鸭一般的方式,也是金属热处理的基础,称作球化退火。

神奇吧,一冷一热、一烧一烤、水基、油基带盐浴,洪涛就像变魔术一般,通过看似很简单、实则总结了几百年的技术,把这些钢铁翻过来掉过去的揉捏。

让你软立马就得跪下、让你硬穿着棉裤都得捅个洞、让你一边软一边硬……这个姿势太难形容了,只可意会。

光有了合格的轴瓦和滚珠还不成,这种滚珠轴承比较原始,仅靠内外轴瓦中间的凹槽只能限制滚珠的左右移动,无法阻止珠子往一起挤。

咋办呢?还需要用薄铁片做成保持器把滚珠互相隔开,并不会影响珠子的转动。这种东西还有个俗称很形象,叫花架子!

之所以想起来做滚珠轴承,并不是洪涛一时起意,或者闲的蛋疼。渭桥镇基地里运送石炭、焦炭、矿石都是用一种木头轨道的畜力小火车,其实应该叫小牛车,根本就没火。

这种车的轱辘是木头的、轨道也是木头的,虽然比人肩挑手抬要省力的多,可是赶上下雨啥的,轨道会很涩、木头轴承也同样涩,把大老牛累的嘴里直吐白沫,依旧是老牛拉破车,慢的很。

洪涛其实是心疼那些牛,正好有了热处理设备,干脆顺手试试能不能把滚珠轴承造出来吧。这种东西也不是仅仅解脱了牛,还可以用在马车上。

等以后到了湟州,大部分给养都要从京兆府运送。有了滚珠轴承的车肯定比原始的车省很多力气,毕竟湟州是高原,往上送东西不容易,也算是体贴一下王冠,让他和水虎翼兵将们少受点罪。

“来人,给我围住,一个人不许走!”洪涛说得挺高兴,一高兴嘴上就缺了把门的,和工匠们又聊起了火车的前景。

谁承想隔墙有耳,当外面的人听到一个火车就能拉着十万斤重物跑得比马还快时,眼珠子都要瞪圆了,再也忍不住,一声吼就冲了进来。

“……裴、裴、裴中贵?真的是你!这、这是闹的哪一出啊?苗指挥,难道你也要谋逆了,光天化日之下,在皇庄里对驸马和提点监司图谋不轨!”

<--di--!>
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