"This can be cast with clay fan, but it is bigger, and the industry is too heavy, so it is better to make an iron fan first and cast it with an iron fan."

"There is no need to use a solid one for this bracket, it is too heavy and too expensive to use iron, and it can be made into a triangle."

"These are all cast, and the pig iron accumulated these days is almost used, which is not cheap."

"Childe's drawing is required to be as round as possible, and the surface should be absolutely smooth, and this can be made little by little with a file. Then polish with a fine sand wheel. ”

Li Jing listened to it for a while, these are not difficult, they can be done.

Li Jing said: "From now on, work overtime, work in three shifts, change the guard, and the work cannot be stopped until it is made and installed." I'll give you some new rulers and weights and measures, Uncle Qiu, you come and catch it, organize it now and start immediately. When it is done, one of them will be rewarded with five taels of silver."

Five taels of silver is equivalent to two months' wages for these masters, but it is a lot. Everyone hurriedly thanked them. Under the command of Li Qiu, the construction began.

Li Jing found the people in the blast furnace group and directly gave them the standard of mixing steelmaking, and asked them to contact them to directly mix steel with different carbon contents. If you overmix it and make mature iron, you can use it to fill it with steel.

Three days later, the final assembly line of the rolling mill was completed, and everyone did not go to the owner to do anything with this thing. It's all amazed on the side. This rolling mill can only tie one meter wide steel plate. It's just a preliminary product, but Li Jing feels that it is enough. The final step of the mill line is a millimeter of thin steel plate. The last five processes are one millimeter apart. From five millimeters to one millimeter, Li Jing has different uses for different steel plates, and whatever thickness is needed is off the assembly line there.

One millimeter thickness, to make raw materials. Prepare individual more precise rolls, press into sheets with a thickness of 0.2-0.3 and then tin. Tinplate is used to make packaging boxes for canned food, luncheon meat and other foods. Later, Li Jing prepared to make a trawler. Mass production of seafood.

In order to ensure that the bullet can be loaded, the diameter of the bullet had to be reduced as much as possible, and it was not round, which eventually led to serious air leakage in the chamber, and the bullet itself was not powerful enough to penetrate the slightly thicker plate armor.

The thickness of the protective armor of the plates was tested by the Europeans with their lives. One millimeter anti-flow arrow. 1.5 mm serious anti-arrow. More than two millimeters can carry the English longbow at close range, and even the arquebus stray bullet. Three mm is completely immune to longbows, crossbow arrows, and even arquebus bullets at normal distances. Five-millimeter immunity is even the ability to withstand the stray bullets of some small artillery shells, and this refers to the European plate armor of wrought iron, not the plate armor of carburized wrought iron. Of course, no one will go to battle in armor half a centimeter thick, it is too heavy.

The raw material used by Li Jing is steel, and it is a carburizing and heat-treated steel plate. Two millimeters was sufficient, and the arquebuses and flintlock pistols of this era fired very soft lead bullets. Even a distance of more than ten meters can be blocked. Li Jing put the mold of the armor parts of the simple design directly under the hydraulic forging hammer, put the cut steel plate into it, and made a part with a bang. Everyone was stunned.

The plate armor designed by Li Jing is simple and rough, with a front chest and a back piece, all of which are curved, with a good ricochet shape, and the top is tied with a cowhide rope, and the pullover is worn. Underneath hang a four-piece armor skirt directly on the cowhide belt. Moreover, the surface of the armor is not smooth, but a dense triangular pyramid is pressed, and the edged metal defense is higher. The helmet is stamped out directly, just like a small round iron bucket. Drill holes in both ears, otherwise you can't hear anyone else. A narrow slit was cut with a chisel at the eye, and the iron sheet was turned up to form a brim-like eyebrow to prevent rain from entering the helmet. For the mouth and nose, use a hammer and an iron cone directly to smash out dense holes. Used to breathe. The helmet is relatively wide and can be attached to the shoulders of the plate armor. The head can be twisted freely on the inside, with three long slits on the left, right and front to prevent the head from being smashed by the enemy with a blunt object. You can also bring a warm hat inside.

These parts are directly tempered and carburized on the surface for heat treatment. After it was done, it was weighed and a set of 20 kg. And so the ugliest and most rudimentary armor in the world was born. If you were to be seen by the masters of Milanese armor and Gothic armor, you would vomit blood and die. What the hell is this?

Now there are three blast furnaces that can be used, producing 30 tons of iron and 25 tons of steel a day. One ton of steel can make fifty sets, and the hydraulic forging hammer is one component, and the hydraulic forging hammer is one component each, each of which is outrageous because of the small number of parts in Li Jing's armor. Assembly line production, 24 hours a day production capacity, excluding waste products, can reach 1000 sets.

I already knew that this production capacity would allow the stone pillar soldiers to make any shields, just sell them plate armor directly. Then let them settle their accounts with sand gold and timber. Besides, the steel shield is also simple, make a good mold, and make a bang, it is one. It can be pushed and carried by installing two wheels, and it can be carried by installing a handle. The observation hole can be made to slide and be blocked when not in use. The shape can be made in a curved shape, and it can also bounce. It's no problem to put on a triangular bracket, and when you encounter a heavy cavalry impact, rush, rush casually, put up your spears and shields, and everyone hides behind. Horses can knock through steel with hoe brackets, don't be funny.

Li Jing ordered to make every effort to produce armor, first make 20,000 sets of two-millimeter ones, keep them for his own use, and sell 30,000 sets of one-millimeter ones to the Spaniards, Portuguese, Japanese, Indians, and those sultans in the South Seas, the Arabs can buy or sell them if they want, anyway, they like to go to war if they have nothing to do.

For the sake of insurance, Li Jing's armor is not assembled, and the parts are stored separately. Just looking at one part, with the imagination of the Ming Dynasty people at this time, this thing is not at all similar to armor. But don't look at the prohibition of production, trading, and possession. In the country of planting flowers, it is not easy to sell things, the more this thing is forbidden, the better it is to sell, I haven't read the banned books of the Ming Dynasty, and the backyard of the official eunuchs and gentry who are banned, the girls and daughters-in-law have a copy. As long as you can make it, some people are willing to pay for it.

Li Jing ordered to also make a lot of plates, which were used to make armor on the side of the ship, and later the ships of the Li family were riveted with a layer of steel plates from the waterline on the side of the ship to the bulwark, and then brushed with rubber to prevent seawater corrosion. Small river vessels can also replace their canopies with steel sheds with thin steel plates. So that you are not afraid of the shooting of bows and arrows.