As soon as the day came, Long Yuan left the blacksmith shop and returned to the Fire Crown Cave.

"Half a month, this time is barely acceptable. "Chi Hong Dao. He then inspected the short sword that Long Yuan had made in the blacksmith's shop, and he was very happy.

Although he didn't say it or show it, Chihong was still quite satisfied with Long Yuan. Long Yuan was able to create mortal weapons in half a month, and he thought that he had stayed in the blacksmith shop for two months before he came out.

"Let's talk about your feelings, Master, I'll listen to your experience and give you a comment. ”

"There are different ways to build mortal weapons, and depending on the material, there are mainly casting and forging. Let's talk about casting first, this method was the mainstream way of making weapons in the Qin Dynasty and before. Its essence is casting, pouring the smelted copper liquid iron into the mold to cool and then repair. Among them, the smelting step is very important, which requires impurity removal and dispensing. Some time ago, I subconsciously wanted to use the method of casting when refining weapons. ”

"Well, that's good. Chihong listened to Long Yuan's experience and stroked his beard.

"As for forging, it was the technological breakthrough in iron ore smelting in the Han Dynasty and later, and iron had great plasticity, which derived forging manufacturing. The process has also changed, taking the sword as an example, forging a long sword requires going through the process of smelting, forging, steel filling, forming, and quenching. Smelting turns iron ore into iron, forging increases hardness, filling steel makes the sword rigid and soft, and then cold forging extends to make it shape, quenching makes the sword permanently hard. ”

Seeing that Chihong didn't mean to comment, Long Yuan continued: "Since the teacher asked me to talk about my experience, I'm afraid that's not what I want to hear." ”

"Boy, the brain is bright. Chihong smiled.

"Far from it, after all, my knowledge is limited, but with my current situation combined with these two ways of making weapons, students can talk about their understanding of one, two, three. ”

"Say, if you say something wrong, I won't knock you. ”

Long Yuan pursed his lips, and then said, "With my current ability, casting and forging are a little bit of a margin. I only have a gas refining furnace in my body, and there is no mold or anything like that, so I think that the model should be to control the flame with mental power to make it shape, and hold the liquid true qi, and the students in this step of smelting think that the refiner does not need it, and the material we want to refine is true qi, and the true qi is already extremely pure, and there is no need to remove impurities, as for adding materials, if I can store metal now, I will study it. Casting is a mold formed by a telekinetic flame to cool it. The hardest part of this is cooling, because the temperature of the Unextinguishable Flame needs to be tightly controlled, and I don't think I can do it right now. The final cultivator guessed that it should be related to the metallic true qi in the body. That's what I'm thinking about casting. ”

"Go on. ”

"In terms of forging, smelting is similar to smelting, and it is not mentioned. Forging is a physical work, and it is extremely delicate, I remember that the teacher once compared mental power and physical strength, so I concluded that forging is still related to mental power and flame, it should be placed in the gas refining furnace after the high temperature refining, by the inner wall of the refining furnace sublimated dense gas pressure the true qi, cool into a solid and then carry out the forging operation, just like forging red-hot iron. Although the teacher once said that my mental power is good, if I want to use this to forge solid true qi, it is still far away. When I first started refining weapons, I didn't even know that there was such a process, let alone a thousand stacks of forging. The same is true for the forming step. Quenching requires cold water, forgive the students for being stupid, I can't connect this step with our refining weapons. ”

Chihong nodded, stroked his beard, and said, "It's not in vain that I didn't go to the blacksmith shop, it's good to have some gains." As you can guess, the refiner refining weapons is also divided into two ways: casting and forging, in the early stage, because of the refiner's lack of mental power, it is difficult to forge, and refining weapons is through casting. After breaking through the three grades, the weapon will be refined by forging, and the process of forging must be completed by telekinesis, and it is not possible to directly contact the weapon embryo with iron tools like in the world. Now forging weapons is still far away from you, and I won't mention it, just talk about casting. ”

"It turns out that forging weapons requires a third-grade refiner to complete. Long Yuan nodded and continued to listen.

"In the same way, the alchemist casts weapons in a different way, and he also casts, smelts, casts, and repairs, but he also needs to quench. It's just that the process is very different from what you see in the blacksmith shop. The correct steps for a refiner to forge a weapon are transformation, smelting, modeling, casting, quenching, and smelting. ”

"Casting also needs to be quenched?" Long Yuan was puzzled in his heart, but he didn't ask immediately, and continued to listen.

Chihong turned around and sat down in his chair, took a sip of tea, and continued: "Transformation and smelting can be combined into one process, with the purpose of removing impurities. ”

"Miscellaneous removal?" Long Yuan looked at Chi Hong suspiciously.

"Although the true qi in the martial artist's body is very pure, there are still impurities. The purest and purest true qi can only be possessed by those who have extremely high talent in martial arts or who have stepped into the extreme realm. At this stage, the requirements for the refiner to control the fire are very high, and it is necessary to repeatedly transform the true qi between the three states to remove impurities. ”

Long Yuan kept this knowledge in his heart, and he kept his ears on his back, and he was about to clean his ears.

"The next model, you guessed correctly, is related to telekinesis and flames, but the most important thing is to need the assistance of the metallic true qi in the body. Because fire is invisible, if I want to control it into a very precise shape, even as a six-rank refiner, I can't do it, let alone keep the shape of the mold unchanged. I guess you've also discovered that the metallic true qi in your body is extremely difficult to call. This metallic true qi is extremely inert, and it is difficult to escape even when exposed to heat. It can be used to encapsulate the liquefied true qi, and then control the true qi with telekinesis to maintain it into a mold. Or after the technology is proficient, directly form the filthy metallic true gas into a mold and cast. ”

"No wonder the refiner must have a trace of metallic true qi in his body, it turns out that it has such an effect. It was only then that Long Yuan understood the effect of that trace of metallicness.

"Not only that, you asked before if heating the true qi will make the true qi explode from the closed place, the closed places of the refining furnace have metallic true qi solidified and combined, and after the metallic true qi enters the refining furnace, it will be attracted to some of these closed places, and it will be cured for a short time, which is used to seal the entire refining furnace. ”

"Teacher, in this case, won't it be impossible to open?"

"I told you that it was a short-term solidification, and the mind controlled the refining furnace a little, and it was lifted. ”

"The metallic spirit is amazing. ”

Chihong smiled and continued to teach: "This alone is not enough, although it is casting, it still needs to be slightly forged in this process. After the flame envelops the metallic true qi, it heats it up, and the innermost liquid true qi is heated and evaporated, increasing the density of the metallic true qi. Finally, after the temperature of the flame dropped, the metallic true qi turned into a golden juice that was not easy to flow, enveloping the liquid true qi inside. At this time, it is necessary to slightly forge to maintain the shape of the mold, and at the same time, the liquid true qi in it is mixed with the metallic liquid true qi to make the inside gradually smooth. ”

Long Yuan listened attentively, he didn't expect the refiner to refine weapons so skillfully.

Looking at Long Yuan's expression of surprise and fascination, Chi Hong's heart was also very happy. As a teacher, I am not unhappy when I see my students listening carefully and being fascinated by the lectures.

"After these two steps are completed, the temperature of the flame should be controlled to drop, and after the liquid metallic true gas solidifies, it will be quenched with the cool liquid true gas. Finally, the sword body was repaired with small fire and telekinesis, and after completion, a weapon was successfully refined. ”

"Wonderful, wonderful. As soon as Chihong finished speaking, Long Yuan clapped his hands and praised.

Looking at Long Yuan's move, Chi Hongden looked stinky and said, "Our refiners are the real craftsmen, and we can be called artists." Look at what kind of bullshit alchemist alchemist alchemist, what alchemist said is ugly, that is, poisoner, it is three points poison, and people take medicine if they are sick or not, and the alchemist is just a treasure that can attract spiritual power, such as the treasure weapon that is blown into the sea in the instrument, what is the law of the avenue, what is the divine power, and when he goes to the battlefield, he holds the refining urine jar and fart curtain one by one, and he thinks how powerful it is. ”

Long Yuan sneered, thinking that this old man's hurtful kung fu was really first-class.

"Teacher, what's going on with the quenching of the casting?"

"When it comes to quenching, this is our refiner's signature skill. Even if the true gas can be turned into a liquid, the temperature in the gas refining furnace is the same as that of a cast weapon, and it cannot be quenched. Speaking of this, Chi Hong glanced at Long Yuan teasingly and asked, "Do you know why?"

Seeing that Long Yuan's head was shaking like a rattle, Chihong's old face was raised, and he said proudly: "Because only one refining furnace is not enough, it is also necessary to refine an extremely strong true qi cylinder in the body to hold the liquefied true qi, until it cools down and is used as quenching water." ”

"That's exactly what happened. ”

"But this technique is a way that I have been immersed in refining weapons for more than 300 years. Chihong looked at Long Yuan, as if he was waiting for something.

"Teacher Niu Ben!" Long Yuan gave a thumbs up.

"Teacher, you don't seem to have refined the True Qi Cylinder for me. Long Yuan said.

"Drip your own sweat and eat your own food. I've done everything for you, and what do I want you to do. Chihong pouted.

Long Yuan was dumbfounded, this teacher seized the opportunity to teach himself a lesson, and moreover, he also taught a lesson.

"Teacher, can I refine the True Qi Cylinder now?" asked Long Yuan. After listening to Chihong's lecture, he was eager to try.

"Don't be in a hurry, sharpen the knife and don't cut wood, and refine it in a few days. You need to know the temperature of the flame and the properties of various metals now to prepare for the future. You won't be here for too long, and your foundation was very weak before, so I'll give you a cramming method. ”