Mitsui Ohara, a Japanese agent, was about to go back, but on his ten-day day off, he happened to see the arquebus club shooting and gambling as usual, and his eyes widened at the time!

How can this be?!

He saw that the coconut a dozen paces away had been beaten and crushed!

What if you change to a pirate with a helmet??

He bowed and stepped forward, and said to the members of the community, who were busy loading their bullets after a round, if he could take a look at it. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

But the members of the community politely refused.

It can't be said to be impolite, there is an unwritten rule among the gunners in the club, the gun used in the competition is not allowed to be touched by others, and everything must be handled by yourself.

Ohara Mitsui was a little angry, and he immediately went to the bow of Zhang Guoan, saying that he wanted to take a good look at the object.

Zhang Guoan's bow happily agreed, the arquebus is not a secret at all, and in the Great Song Dynasty, there are many more built every day than himself.

He took Ohara Mitsui to the Badaohe Military Factory, and after entering the big wooden gate, he went directly to the assembly workshop.

The so-called assembly workshop is the final process of assembling the arquebus, where the assembled iron parts are then loaded with a wooden butt and handle, and finally coated with tung oil to dry.

Most of the people in this workshop were carpenters, and they stopped work together and made a gesture to Zhang Guoan.

Zhang Guoan waved them to continue working.

Mihara Koi was ecstatic at this time to take a dried arquebus and observe carefully, he learned what he saw, pulled the trigger, and saw that a small iron bar on the other side really turned in a semicircle and plunged into an open iron box.

Mihara Koi asked, "How much does this arquebus cost?" ”

Zhang Guoan thought about the weight of the copper coin, and said: "Twenty catties of copper for a handful, black fire/medicine is counted separately ------"

This time. Japan often imported some fireworks from the Great Song Dynasty, although the quantity is not much, but it also figured out the production of black fire/medicine.

What's more, Mihara Xiaojing has lived in the Great Song Dynasty for many years and is also familiar with this thing.

Mihara Koi said: "It's hard to get to the black fire / medicine at the bow of Zhang's bow is unusual? ”

Zhang Guoan said: "Yes, it's different------ only with black fire/medicine like mine can it be effective." ”

Mihara Koi immediately said, "Yes." Can I buy a few first? Copper, I can bring ------ next time"

Zhang Guoan smiled and said, "Of course, you are my agent." ”

Zhang Guoan called a carpenter and asked him to take Mihara Xiaojing to the gun test yard to test the gun and teach him how to use it.

He didn't tell him about the two copper mountains in the end, he felt that it was not time yet, and it was of little use.

Now, Zhang Guoan still had to ramp up the production of arquebuses, because this type of weapon was still suitable for defense. Now there may be one more use, and export is also a good way.

Twenty catties of copper, about two and a half copper coins, this is pure copper, and the purchasing power is very different from paper money such as Huizi, which is much higher.

So, judging by the purchase interest of Nakayama and Mihara Koi on Ryukyu Island, he made up his mind. At the same time, it is necessary to develop the arms trade.

As long as his weapons are consistently a generation or two higher than in this era, he is reassured.

His fire-capped mini is still being processed. However, the medium-carbon steel plate on the three wheels of Zongshen Zhengxiang that he brought with him would soon run out, and the "good iron" suitable for making V-shaped springs was still not found.

Zhang Guoan's standard for Hu Zhenbei, director of the military factory, was: As long as the bullet can be pressed normally 300 times without weakening or breaking, it is considered qualified.

Zhang Guoan has no metal detection methods at all, and can only have empirical methods to find suitable materials, but fortunately, the V-shaped spring is also easy to make.

Therefore, he intended to buy the so-called good iron from all over the Great Song Dynasty. But so far, none of the factories that Director Hu Zhenbei has tried to make can meet the standards.

Hu Zhenbei blacksmith was just promoted to factory director, and he was also anxious to see the results, he said to Zhang Guoan: "Master Zhang's family. Dozens of times, hundreds of times, use it first, if it doesn't work, can you change it to a Weizi spring? ”

Zhang Guoan was also worried, he calculated the number of bullets that might be fired in a battle, and felt that about a hundred times was okay.

He said, "Well, you can use it first, and I'll figure it out." ”

Director Hu Zhenbei smiled with ulterior motives and said, "I know that the master's family must have a way, and I shouldn't come to embarrass my old Hu ------."

Zhang Guoan ignored him, turned around and left.

Zhang Guoan really has to find a way by himself, this time and space is not the same as his own time and space.

In the current time and space, the copper of the Great Song Dynasty is more than twice as expensive as tin, so they added tin to the copper coins to reduce the weight of copper, up to 14 percent!

But in his own time and space, tin is more than twice as expensive as copper, and in the eyes of those people, this is a very stupid behavior.

The times and needs determine the price of materials.

Zhang Guoan checked the information on the material of the spring and decided to put on Ma Xi phosphor bronze.

The earliest alloy used in human history is copper alloy, the ancients discovered very early, after adding tin, the hardness of bronze increased, the melting point decreased------ this technology has been more than 2,000 years in the Song Dynasty, and the skilled craftsmen of the Great Song Dynasty are still using this technology to cast Buddha statues, big bells and so on.

That is, after Zhang Guoan improved the deflagration power of black fire/medicine, he changed it to artillery in the modern sense, otherwise they can be processed, and it is also the level of big spray flowers.

Tin phosphor bronze is a copper alloy containing 2%~8% tin, 0.1%~0.4% phosphorus, and the remainder is copper.

It is mainly used as wear-resistant parts and elastic elements in that world, and it has strong fatigue resistance, good elasticity, and excellent machinability.

Zhang Guoan thought that if he couldn't find a suitable medium carbon steel, he would have to find a way in the field where the Great Song Dynasty craftsmen were best at it.

He first went to the struvite dump, where more than 5,000 tons of struvite were now piled up and were being transported.

Not only did they find valuable struvite on one island, but they also had hundreds of convicted free laborers.

Pure struvite has no odor and is the best natural slow-release fertilizer in the world, but it needs to be crushed.

Therefore, on the cement and stone slab grinding yard on the yard, more than a dozen buffaloes dragged heavy stones back and forth.

In terms of composition, struvite is a mixture of a variety of calcium phosphates, including calcium phosphate rock, triclinic calcium phosphate mine, and white phosphate calcium ore.

According to the different content of nitrogen and phosphorus, it can be divided into two kinds: nitrogenous struvite and phosphorus struvite, among which phosphorus struvite contains insoluble phosphate and exists on the islands of the South China Sea of the Great Song Dynasty, where it is rainy and the nitrogen component is lost more.

The phosphate containing cleaner ones is white crystals, and the more mixed ones are yellow-black or even black.

Zhang Guoan first found a few whiter crystals, and then called a few laborers and asked them to take the crystals as specimens and select them among the struvite stones. (To be continued.) )