Starting from blacksmithing, riding and chopping Europe

Chapter 5 Selling Samarium Knives
Noisy!
The high-temperature samarium knife is submerged into the oil quenching barrel.

The oil bubbles are tumbling, and the sound of sizzling is a bit like French fries.

Feng Daofu's nose moved, and his attention was finally drawn away, and he had time to open the panel to check the news.

"Forging Lv3"

"Specialties: Efficient Charcoal Burner (Charcoal Burning Efficiency +50%), Steel Maker (Steel Making Efficiency +50%), Advanced Steel Maker (Steel Making Efficiency +100%)"

"I just forged a farm tool, and then the iron field enlightened me and upgraded me to two levels at once?"

Feng Daofu had some doubts about whether he had opened something.

But if you think about it carefully, it seems quite reasonable.
For those who major in engineering, preparing for the postgraduate entrance examination before traveling can be described as the peak period of human intelligence, and they have to write N papers in one night.

Those basic knowledge alone, such as metal materials science, metal heat treatment principles and processes, and even the iron-cementite phase diagram in the reference books that were bought for three or five yuan, were Zenith star knowledge in the Middle Ages.

Standing on the shoulders of countless giants, it is normal for forging to rise quickly.

"The character's level is just a few inches away from being full, and it will be just right after finishing the samarium sword. As expected, leveling up is faster through forging."

Feng Daofu held the iron tongs, clamped the samarium blade and slowly stirred the oil quenching barrel to strengthen the flow of oil to help heat dissipation.

When stirring, it can feel a little sticky, and some carbon black falls from the blade and sinks to the bottom.

Feng Daofu said to himself: "Quenching oil is not good."

Different materials have different oil numbers, and different materials have different hardenability.

Most of the materials can be eaten with one kind of quenching oil, but the seal oil with many impurities used by blacksmiths is obviously not counted.

Unprocessed seal oil contains a large amount of mucin, which is much more viscous than cooking oil.

The flash point is also low, and the steam formed during quenching is easy to burn when exposed to oxygen. When the quenched blade takes out oil, it is easy to catch fire and cause the oil barrel to burn.

Feng Daofu thought: "I will pay attention later."

"Speaking of which, I seem to have seen a post saying that seal oil is softer and more viscous in summer, but vice versa in winter. I don't know if that's true."

Want to try it!
Leopard:?
Feng Daofu continued to stir, and could feel the microstructure of the samarium knife strips undergoing drastic changes.

The two newly acquired specialties are working.

The efficiency of steelmaking reaches +150%, and Feng Daofu's feeling is clearer, as if he has a metallographic microscope.

"Sports students will only be bruised and swollen when they get hit by a little boy. It is very reasonable for me to feel metallography with my engineering dog."

"The human body is amazing."

It's a pity that the first time I forged it was wrought iron farm tools.

The extremely low carbon content of wrought iron determines that no matter how well it is heat treated, it is impossible to improve the metal properties.

"Just think of it as training. Originally, you just use farm tools to practice. Once you are proficient, you can challenge the knife forging."

When the temperature was about the same, Feng Daofu carefully lifted out the samarium blade.

Feng Daofu took out the samarium blade completely after testing repeatedly to make sure that the oil drum would not be set on fire.

The blade is straight and perfect.

Vondorf first degreases the samarium blade and cleans off any seal oil left on it.

After degreasing, Vondorf does not temper, and wrought iron does not need this step.

While waiting for the samarium blade to dry naturally, Vondolf began to adjust the long handle.

The biggest difference between a North scythe and a scythe is the long handle.

The Samarium Knife has a strap. When in use, it is slung across the shoulder to make a semi-circular swing. It can be used with force, and the efficiency is relatively much higher.

If it weren't for the sake of hands-on experience, all we would have to do is improve the long handle, re-sharpen the blade, and improve and strengthen the way the blade base is fixed.

With the experience of the pulley block before, Feng Daofu quickly improved it, and also ground the anti-skid groove to improve the feel.

Good tools, in addition to good materials, are also key to the feel of using them.

No matter how well the heat treatment of the steel is done, if the tool handle stretches, squeezes or even hurts the hand, then the tool is substandard.

After assembling the samarium blade and the long handle, Vondorff picked up the whetstone and began to sharpen it to ensure that it is light enough but also sharp and durable.

The sound of grinding is a bit noisy, or it hasn't been quiet since the forging started.

Fortunately, the land is vast and sparsely populated, and the neighbors are separated by a certain distance, and the Mao Luo who live in the same house are also used to it.

Only the animals complained a few words.

Changmaoluo skillfully stuffed them with a handful of grass. The delicious grass blocked their mouths and stopped complaining.

Because the work done in the forging stage is sufficient, it has been prepared to almost take shape, which greatly reduces the grinding workload.

The hardness of wrought iron is not high, it is not too difficult to polish, and there is a bonus of -50% forging energy consumption, Feng Daofu's efficiency is very fast.

After a while, the brand new samarium knife was shining under the dim furnace fire.

"Successfully forged a samarium knife, forging +10"

"Forging Lv3 (2%)"

"Character level up!"

The big guy's HP +2 per level is working, and the fatigue seems to be swept away.

Feng Daofu wiped his sweat: "There is not much experience, but more experience is required to upgrade, it's a liver thing."

"Fortunately, it's wrought iron, otherwise the amount of polishing work is not good. Wait, for wrought iron, it seems that there is no need to use a sledgehammer, right?"

"After all, the hardness is not that high. There is no need for repeated folding and forging. Naturally, there is no need for a sledgehammer. A small hammer is enough to adjust the shape of the knife."

Feng Daofu was silent.

A few seconds later, he ignored the matter as if nothing had happened, and tested the experience of using the samarium knife.

Before taking the sickle, Feng Daofu put down the hammer first.

After testing for a while, I came to the conclusion that it can be used as a farm tool, but it is better to use it as a weapon.

"The balance is average, the inertia is too large to operate, and it is easy to hurt your legs if you go against it."

Von Dolf swung it like an electric fan: "When it leaves the factory, it gives instructions for use to the North farmers so that they can use it with leather boots and leather shin guards."

"It can only be used as an electric fan, and it is impossible to form a dense formation. The team's ability to resist impact is too poor. No wonder Swadia recruits often use straight samarium knives."

Feng Daofu suddenly had an inspiration.

He feels that it can be used in conjunction with North Farm's fence to fight defensive battles.

"Standing one by one at the base of the wall, each one has a big sword. When he sees the enemy coming in, he will turn around. This is a good idea!"

Feng Daofu plans to publicize with them like this when the time comes.

North farmers may not be willing to spend 2 extra silver coins to upgrade their farm tools.

But if it's 2 silver coins, you can get a good defensive weapon. No Norse would refuse it.

Feng Daofu seemed to see countless centurion silver coins flying towards him!

Greedy's monthly income +5% is reflected here.
The next day.

At 07:30 in the morning, before dawn, there was a rustling sound in the longhouse.

Feng Daofu turned over in a hazy state and narrowed his eyes. It was three Mao Luo who got up.

Big Mauro also tucked him in the quilt.

Feng Daofu said confusedly: "Will you not sleep again?"

Da Maoluo shook her head: "The kang built by the master is so comfortable to sleep on, I'm afraid of oversleeping."

"Master is amazing!"

The three soft fair faces were full of admiration for Feng Daofu.

Feng Daofu also felt comfortable on the kang.

Most of the month is not all busy coughing and climbing the technology tree.

When I first crossed, I thought about improving the heating technology, and made a few clay bricks every day when I was free.

Feng Daofu has panel bonuses, and the extra intake of fishing and hunting is enough to restore his physical strength, and his physical strength can be restored.

The adobe bricks were finally almost dry a few days ago. After finishing his work last night, Feng Daofu built a compact version of the large northeastern adobe kang.

Sleeping on the kang, the body is warm and comfortable, and I start to feel drowsy.

Without saying a few words, Feng Daofu looked at the busy backs of Mauro and fell asleep again.

When I opened my eyes, the sky finally began to light up.

"How long have I slept?"

Feng Daofu fell asleep a bit, at first he thought it was only 7 o'clock.

Gollum~
Hearing his stomach beating like a drum, Feng Daofu remembered that the time zone in Northern Europe is different.

It is a high-latitude Nordic region.

The Port of Luleå is another northern area, almost approaching the edge of the Arctic Circle, and it didn't start to shine until around 10 in the morning.

"I slept for more than ten hours?"

Feng Daofu shook his head, almost dizzy from hunger.

He glanced at a certain generator that pressed pickles.

Although it is far from the expectation, the simple hand-wrought generator is also useful, and it can be used to test the electrolysis technology.

However, thinking about his original ambition, Feng Daofu's blood pressure instantly returned to normal.

"Owner."

Changmaoluo handed over hot water and towels.

Xiao Maoluo stretched out her little hand, wrung out the towel, and gently wiped his face.

After wiping her face and rinsing her mouth, Da Mao Luo also made breakfast.

The staple food is a bowl of fragrant milk barley porridge.

Boil briefly with water, then mix into milk, boil slowly with a simmer, and then crack two eggs in it.

Next to the barley porridge is a wooden plate and a large wooden bowl.

Fried fish in butter on a wooden plate with a piece of peeled garlic next to it.

The big wooden bowl is a stew with cabbage, radish, beans, mushrooms and some seafood.

Da Maoluo said: "I took the pigs to the forest yesterday and collected some nettles, sorrel and mushrooms."

Feng Daofu praised: "It's very fragrant."

Big Moluo blushed happily.

"Dinner!"

Feng Daofu started eating in big mouthfuls.

Halfway through eating, I noticed that Changmaoluo seemed to be in a bad mood.

Chang Maoluo has a pair of straight and long legs, and is already over 1.6 meters tall. She looks like a mature girl, but she has always been introverted and reticent.

Feng Daofu asked: "What's wrong?"

"Master, I'm a little uneasy." Chang Maoluo said, "The food is so good."

The other two Mauro also nodded.

It's never been so good before.

In the past, barley porridge was thin!
It's fried fish and milk and barley porridge. This is probably what nobles do, right?

Three Mauro thought innocently.

Feng Daofu understood their uneasiness very well.

I want to explain that in the past there were more than a dozen slave laborers in the whole family, but now there are only four of us left, and I don’t want to say that the food stored for the winter can’t be eaten at all.

Feng Daofu finally showed his majesty as a master, picked up his chopsticks and gave them a piece of fried fish one by one: "Eat!"

Longhair showed the most obvious emotions, and Feng Daofu gave her a feeding punishment.

"Well"

Changmaoluo's mouth was blocked, so she could only swallow the fish passively.

Vondorff took another spoonful of the stew.

The long-haired radish that I ate was warm and full of tears.

Only then did Feng Daofu let the poor Shao Luo go, and cast his majestic gaze on the other two.

Big and small Moluo quickly ate.

It's good to eat more, and it's better to eat more. Feng Daofu ate another bowl of wheat porridge, and drank milk after dinner with satisfaction.

"Hiccup~"

Feng Daofu put down the bowl and burped comfortably.

Master's milk tastes so good?
The three hairy swallowed their saliva.

They were all given a bowl, and Xiao Maoluo tried to stick out her tongue.

"Alas!"

It still tastes as bad as before.

A majestic look was cast at them, and the three Mao Luo drank the extra milk with a sad face.

Feng Daofu can understand their feelings.

The technology is not very good these days, and the smell of milk is a bit strong.

Children have a particularly sensitive sense of taste, which is simply an amplifier of mutton.

Many children don’t like to drink modern milk, let alone this kind of ancient milk.

But in order to grow taller, you must drink!

After eating, the three Maoluos washed the dishes and pans, and soaked some wheat bran in the dish water to feed the chickens, ducks, geese and pigs.

Vondorf walked around the house and counted the number of steps he took.

After eating, Feng Daofu went to Sarri with a samarium knife.

"Complete a complete transaction, transaction +2"

"Transaction Lv0 (43%)"

"So fast?"

Surrey was surprised.

"So easy to use?!"

Sarri was shocked.

The movement here attracted other North farmers.

With Sarri, a simple and honest man, Feng Daofu easily placed 10 orders without using any words, and his diplomacy and trading skills were greatly improved.

Vondolf stood at the door of his house counting 20 silver coins, as if he had already seen himself recognized by the North tribe, inheriting the blacksmith's legacy, expanding a large home, and then gaining more (female) family members while trading freely around.

　Quenching: Compared with the austenite grains before quenching, many secondary grains will be newly formed in the martensite after quenching.

　　These fine secondary grains can evenly disperse the plastic deformation and avoid the stress concentration caused by a large number of dislocations near the single grain boundary, thereby improving the strength.

　　And because the cooling rate in the quenching process is very fast, the carbon atoms in the steel have no time to diffuse, and remain in the metastable form of a supersaturated solid solution. The dispersed carbon atoms will produce obvious solid solution strengthening for the material.

　　Since the size of carbon atoms is much smaller than that of iron atoms, carbon atoms usually occupy the interstitial positions between iron atoms.

　　The squeezing of iron atoms by carbon atoms will cause obvious lattice distortion, thus generating a long-range strain field.

　　If the concentration of carbon atoms is relatively high, a large number of carbon atoms occupy the gap in the same direction, which will cause considerable deformation of the iron matrix in this direction, making the ferrite under normal conditions into martensite, because of the decrease in symmetry, The activation of dislocations in martensite will be more difficult, thereby increasing the hardness and strength of the material.

　　Simply put, it’s about playing with carbon.

　　The more carbon dissolved into austenite, the higher the hardness after quenching.

　　The carbon content of wrought iron is approximately less than 0.02%.

　　Without enough carbon atoms to participate, no matter how good the quenching is, the strengthening effect will be the same thing.

　　Otherwise, there is no need to toss about the steel pouring method and carburizing method, and directly use the steel-like will to organize the bull-horse-hundred-smelting method and the bull-horse-thousand-smelting method!

　　Tempering is reheating, allowing carbon atoms to diffuse, reducing solid solution strengthening, reducing internal stress, reducing strength, and improving toughness.

　　There are not enough carbon atoms in wrought iron, so there is no need to temper.

　　
　
(End of this chapter)