Chapter 3: Master punched to death

There was a coal stove in the blacksmith's shop, and the fire was booming. Obviously, Zhang Sansan was also hitting the iron just now. He heard their voice and let go of his work.
Qin Haiqian I was a man with a wide range of hobbies. In order to dig up traditional folk material processing technology, he had been an apprentice to the smithy for a few days, so he knew a little about the tools and rules in the smithy. He picked up a fire tong from the ground, put the shovel head in need of repair, put it into the fire, and began to roast.
"Dude, do you really harden?" The fat man also got in, and asked Qin Hai in a low voice.
It was midsummer weather. The temperature in the blacksmith's shop was seven or eight degrees higher than the outside, which was similar to a steamer. Qin Hai stayed in this room already felt unbearable. Fatty people, such as the most afraid of heat, actually got in, totally disregarding the heat and sweat flowing on his body like rain, showing how much he valued this matter.
"Will you hit the iron, brother?" Qin Hai did not answer the fat man's question, but asked a question instead.
"I'm a blacksmith," the fat man replied, "these farm tools were all made by me."
"That's great." Qin Haidao, "The shovel has rolled its blade, and it needs to be forged again. This is left to you."
"Okay." The fat man nodded and nodded. People can help quenching is a great favor, can't they still let people go to sledgehammer?
Qin Hai heated the shovel head to a certain temperature, clamped it out with tongs, and rested on the anvil. The fat blacksmith also had a few brushes. If he lifted a heavy hammer with a light hammer, he would forge it on the head of a shovel. Because it was just repairing the curled edge, the forging work was not heavy. The fat man smashed it a few times with a hammer, and Qin Hai told him to stop.
"Okay, can you quench it?" The fat man pointed to a basin of water next to him and said to Qin Hai.
"Not busy." Qin Hai waved his hand, returned the forged shovel head to the furnace again, and reheated it. His eyes through the fire, staring at the color of the shovel's head, waiting for it to heat up to the expected temperature.
"What are you waiting for?" Fat man asked Qin Hai in a serious voice when he saw Qin Hai's seriousness.
"The heat treatment is not so simple. It is necessary to first heat the metal to Ac3, which is the temperature at which free ferrite is completely transformed into austenite, resulting in solid solution strengthening, and then taken out to slowly cool in air to make the grains fine. Carbide and uniform carbide distribution ... "Qin Hai whispered to the fat man the introduction to heat treatment.
"This ... it's too much trouble." The fat man directly rejected the post-doctoral teaching of the academy of sciences. What austenite, grains and the like are too far away from him. He only cares a little when he can see the hardened result.
Walking outside the blacksmith's shop, Zhang Sanshou watched the movement in the room while chatting with the barbarians. Seeing Qin Hai warmly heating the workpiece, the smile on his face slightly converged.
"What's the matter, youngest?" Quite awkwardly, when he felt the change of his attitude, he asked quietly.
Zhang Zhangsan said: "This little young man has some rules ..."
"Which is better than you?" He said with a smile. He knew that Zhang Sanshang always used his skills and pretended to be self-proclaimed. Now he hears a little young man with some rules, so he can't help but devalue him .
The old man Zhang Zhang said insincerely: "Compared to me, he has to wait 20 years ... But, what does he mean by doing this, I can't understand ..."
At this moment, the short young man who was looking for chemicals came back with a grunt, panting, holding a cloth bag in his hand, which contained several medicine bottles.
"Hey, what about the crossing?" The short man asked the tall man waiting outside the door. Qin Hai had not informed them of his name, so he could only use "passing" to refer to Qin Hai.
Gao Tiao pointed his mouth into the room and said, "Where is it, it has been ironed just now."
"I'm late?" The short man was a little depressed.
"It's not too late, the timing is right," Qin Hai answered in the room, "there is nothing."
"It's all here." The short man replied happily, ran such a long distance to find things in this hot day, and it would be uncomfortable if he couldn't find it.
Wu Qinhai had already taken the heated shovel head out at this time, but instead of pouring it directly into the water, he threw it into a pile of ash next to it to keep it warm. This method is called tempering, and it is also one of the several major processes of heat treatment. Qin Hai said just now that it is necessary to harden these agricultural implements, but it is just a popular saying. What he has to do is to integrate various processes such as normalizing, tempering, and quenching to achieve comprehensive heat treatment of the workpiece.
While the shovel head was warming, Qin Hai took the medicines found by the short man and began to pour into the quenching basin next to him. Obviously, accurate weight control is impossible. Qin Hai can only estimate the proper amount of a medicine based on experience, and then pour it into water for mixing.
"Epigenetic, what are you doing?" Zhang Laosan did not know when he had entered the smithy, watching Qin Hai's busy, curious.
Qi Qinhai smiled at Zhang Laosan and said, "I'm preparing a quenching solution. This type of 65 manganese steel needs to be quenched with an aqueous solution of trinitrate. The effect is the best."
"This is the first time I heard this." Zhang Laosan wondered, "Isn't quenching just water?"
"Have Master Zhang heard of oil quenching?" Qin Hai asked.
"Oil quenching ... I have heard of it." Zhang Sansan said that the so-called oil quenching is to use vegetable oil instead of water as the quenching medium. Its quenching effect is not the same as water. Zhang Laosan knows that some ironwares are more effective in oil quenching, but due to the high cost, they are not used in practice.
Qin Haidao: "My reason is similar to oil quenching. Different materials and different applications require different quenching processes, which involve the use of different media. The trinitrate solution I use is most suitable for this steel . "
"Three nitrate ..." Zhang Laosan was completely fooled by Qin Hai. If Qin Hai is not right, he is right again; but to say he is right, what is the kind of trinitrate, Zhang Laosan has never heard of it. This young man understands something better than himself. More old blacksmiths?
"You can see the effect in a moment." Qin Hai smiled and no longer explained these problems. The scientific principle of material heat treatment is really not understandable by a folk blacksmith. Of course, this does not prevent these folk blacksmiths from instinct and years Practice can find out the heat treatment methods that make materials experts admire.
Xi Qinhai took the cooled shovel head off the ash and sent it to the furnace for heating again. After it turned red slightly, it was taken out and stuffed directly into the prepared trinitrate aqueous solution.
"嗞!"
There was a crisp sound of water, and a stream of water vapor rose from the quenching basin. Everyone in the room smelled a strange smell of sour, not sour. Qin Hai soaked the shovel head in the water for a minute or two, then clamped it out, threw it on the ground, and said to the fat man, "Well, take it out and let those uncles try the cutting edge."
"Really good?" The fat man was overjoyed, and he didn't care about the residual heat on the head of the shovel.
"Well, you try it." The fat man shouted to a few farmers.
"Alright?" Asked the farmer named Man ，. He took the shovel head, looked at it carefully, and nodded his head, "Oh, it looks like the right color. I just don't know if it's strong or not ..."
"This shovel can really cut bricks?" Asked a farmer next to him, which was betting on just now.
"This ..." The fat man had some lack of confidence. He didn't know whether the saying of hacking bricks was Qin Hai's exaggeration. It is hard to harden a good fire tool. If a brick goes down and rolls up, it will lose face.
"It's okay, hack it." Qin Hai also came out of the room, holding hands and smiling.
Hearing Qin Hai's self-confidence, he was curious and wanted to see if the shovel was really as durable as Qin Hai said. He mounted the shovel head on a wooden handle, and found a half-red piece of red brick from the side. He tapped it with a shovel and asked Qin Hai, "Epigenetic, can you really shovel a shovel?"
"Cut it. UU reading www.uukanshu.com" Qin Hai is confident. No. 65 manganese steel is a very widely used material. Later generations have conducted extensive research on the heat treatment process of this steel. If such a heat treatment is also used, Qin Hai can directly wipe the neck and wear it again.
He was still afraid to make a fool. He smashed the shovel back and forth on the brick a few times, raised it again to see the cutting edge, and saw that the cutting edge was intact. a bit.
"Bash!"
The brick shattered into pieces, listening to the crisp sound of the shovel hitting the brick. Everyone except Qin Hai couldn't help but grinned, thinking to himself that the shovel had to be there anyway. A small gap. The barbarian hurriedly lifted the shovel, wiped the remaining brick shavings on the shovel's head with his hands, and looked intently, and laughed: "Haha, there is really nothing at all!"
"let me see!"
"Let me see!"
Several other farmers and Zhang San scrambled to step forward to check the edge of the shovel. I saw that there was only a faint trace of friction in the place where the brick was smashed, and no damage or curl was visible. Everyone can feel the power that was used just now. Under such an impact, there is no damage, which shows that the quality of the blade of this shovel is excellent.

第一 In the first week of the new book, the update is a bit slower. I update a chapter of 3,000 words a day, and strive to save the manuscript. The second week began to strive for two changes a day. Seek recommendations, clicks, and favorites for the new book period.