The first batch of craftsmen and materials sent back by Captain Huang Zu from the Mizhou area helped Zhang Guoan. Pen & Fun & Pavilion www.biquge.info

Because he is preparing to build a number of small and medium-sized warships that can be suitable for the combined use of sea, rivers and lakes.

The bigger the ship, the better, and the larger and farther the caliber and range of the artillery...... This is a requirement for a modern warship, not a requirement for this time and space.

Zhang Guoan, the owner of the island, needed a practical warship that could run in rivers, lakes and seas, and of course, it could not be used in the ocean.

This belongs to a branch of the Badaohe Shipyard, and Director Zhang Laoshi does not want to mix the two factories together, which will affect the speed of shipbuilding.

Director Zhang Laoshi tasted the sweetness of the so-called standard parts production method.

In the past, when they were building ships, the general craftsmen had to do their own sawing of the boards, and the pieces were almost the same, which required the craftsmen to cut the same proportion and strength, and also to take into account the different materials of the wood.

The real master craftsman basically has no scrap, but the average craftsman has to leave more surplus, for fear that the sawing will break, and the longer one can be repaired.

Therefore, there is now a saying among the craftsmen of the Eight Rivers that "a long carpenter, a short blacksmith, and a plasterer who is neither long nor short".

However, this method of working saves materials, but it is labor-intensive, and it requires an additional work process.

The woodworking machine previously launched by Zhang Guoan made standard machining possible.

At the same time, he designed various types of pass and stop gauges, so that they have certain standards for the processing of some miniaturized plates, especially after the units of measurement and scale are unified, the processing effect is getting better and better.

But on large plates, they don't have much to do, because the power of manpower is insufficient.

Until they used water and wind power as the driving force, but in the actual processing, they found that they were too affected by God to stabilize.

This time. The vacuum steam engine introduced by Zhang Guoan played a role.

When Director Zhang Laoshi saw what barrels they could rotate, of course, they could make the circular saw rotate!

The woodworking machine tool launched by Zhang Guoan can only use circular saws.

However, this object is more time-consuming and laborious to build than a band saw, and Zhang Guoan understands that circular saws may have appeared in Chinese history. Probably because of the driving force or manufacturing reasons, it has not developed in the private sector.

I've been using band saws for a long time.

The children's rhyme when I was a child verified this: pull the big saw, pull the big saw, and watch the big play in front of my grandmother.

Circular saws require more materials than band saws, but they are not insurmountable.

At that time, the director of Hu Zhenbei kept looking for the so-called good iron, and in the end, it was Zhang Guoan, the owner of the island, who helped him realize the crucible smelting method.

This kind of smelting refers to a smelting method in which iron ore and charcoal and other fuels are placed together in a crucible, and then heated to reduce the ore to iron, and finally obtain relatively pure steel products.

In fact, this kind of smelting method has long existed in China. At least in the middle and late Western Han Dynasty to the middle of the Eastern Han Dynasty, it has appeared, and the development of all aspects of technology has been very mature.

With the trade and trade with Fujian, Zhang Guoan finally got the so-called "red soil", which is the bauxite in Zhangzhou, Fujian, that is, aluminum trioxide, which is the best high-temperature resistant material.

The refractory of the tongs made from it can reach 1600C!

Therefore, this kind of crucible fully meets the requirements of steel smelting, and can completely smelt fully liquid crucible steel.

In fact, China was already able to smelt liquid steel from this type of tong pot during the Han Dynasty. This is far ahead of the West......

However, this crucible smelting method is not high due to its low yield. The technology is relatively complex, unable to keep up with the demand for large-scale steel use in ancient China, especially when the steel filling method appeared, it is even more useless, so it was gradually eliminated after the Han Dynasty and has long disappeared......

In the Great Song Dynasty. What kind of precious steel such as snowflake iron can be made of Indian Uzi steel...... Indian Uzi steel is actually a semi-melted steel, that is, a gelatinous crucible smelting steel method, removing the special point of raw materials, purely from a technical point of view, the difficulty of the Indian crucible refining method is obviously lower than that of full liquid crucible steel.

But. Because the ancient Chinese craftsmen themselves gave up the crucible refining method...... A long time later, the crucible refining method was introduced from the Uzi region of India through the Western Regions, but at this time, he also learned the semi-melting steelmaking method from others. ]

This cannot but be said to be a pity.

Indian Uzi steel is not magical at all, because their iron ore is very pure, which is a unique natural advantage...... So, when their iron ore ran out in the 18th century, there was no Uzi steel to be produced.

Now, after their Uzi steel is sold to Damascus, it is made into knives there, which are called famous knives...... To be honest, it doesn't have the legendary magic, if you cut it, it's not an opponent of an ordinary alloy steel in that world, their overall hardness is below 50hrc, don't believe in ancient artifacts.

Unless they find a meteorite from the sky, the alloy ratio is just right, it happens to be successful, or the hardness can reach more than 65HRC.

To put it simply, the smelting process of Indian Uzi steel is very sad, so it is very expensive.

They manually mash the world's finest iron ore into powdered ore and wash it repeatedly by panning so that the ore is separated from impurities, just as gold diggers separate gold particles from other impurities.

They were then placed in small clay crucibles hardened by fire, and charcoal-containing materials, such as the leaves or skins and dried fruits of plants they considered sacred, were added to the crucibles, sealed and then burned with charcoal.

The iron ingots produced in this way generally weigh about one kilogram, and they do not have the bauxite graphite crucible of ancient China, so the maximum temperature is only 1200C.

The owner of Zhang Guoan knew how to process them, but because there was no such purified and abundant iron ore, he was never able to reproduce this high-quality steel using this method.

However, the smelting method he taught Hu Zhenbei was already ahead of its time, but it was not as good as their steel...... But it's much bigger than them.

Zhang Guoan's owner must reinstate the pincer-pot steelmaking method...... Because he is not used to machine weapons, but to make special parts, such as roller bearings, gears, cams, knives and circular saws...... This requirement has become more and more demanding.

The steel produced by the tong-pot steelmaking method is of good material, and it is not important that the output is low, and the production of more than ten kilograms at a time has made Zhang Guoan very satisfied.

Director Hu Zhenbei no longer mutters anything like a magic knife, the right tools are far more useful than a magic knife.

People will always change, as long as you put the real results in front of him.

In his eyes, the steel that could have been made into a divine knife was made into a circular saw, which immediately played a huge role.

The carpenters process the panels several times faster!

The speed at which the Badaohe shipyard was able to build ships to the sea immediately accelerated.

However, Zhang Guoan, the owner of the island, considered that a major war was about to break out next year, so he had to choose between either stopping and building a sea boat with a pointed bottom, or a U-bottom boat that was used in the combination of rivers and lakes......

At this time, the Mizhou craftsmen sent back by Captain Huang Zu came in handy. (To be continued.) )