[The sixth update, in this chapter, everyone still has to thank the God of Smoke and the book friend Sha Huaichu].

Successfully learned the golden light trick, his attributes changed greatly, and he had the legendary internal force......

There are changes every day, and there are gains every day, because Lu Zhenyuan suddenly used methods, reversed the depression of the battle situation, and dissipated unconsciously.

Back in the arena, Lin Tuo was once again full of fighting spirit, even if you can really achieve a hundred refinements? Because of Tong Xi's initial strength, you chose a piece of soft iron, even if you are a hundred refinements, you can't reach the level of a legendary-level famous sword at all.

With thousands of years of experience, the high-end of modern metal technology, are you really afraid of it?

Recalling reading the metal craft textbook, with the help of the mathematical tools in the bronze mirror, the accurate ms point of pouring iron, and the optimal crystalline cooling curve drawn according to the composition of the iron, Lin Tuo placed the water pot on the stove, lit the firewood, and put people in the oil pot to fill a small pot with water, fill it with saltpeter to absorb the heat, so as to reduce the oil temperature.

Of course, he knows more advanced techniques, such as graded quenching and isothermal quenching, but both of these require special salt lye and pressure equipment.

Not to mention that there is no equipment at all, even if there is, it is only a solution to facilitate industrial production, salt lye and animal oil animal urine and other components, never the point, the focus is on the hot workpiece inserted into the bath at different temperatures, temperature conversion, energy transfer, will make the temperature of the workpiece itself out of what kind of curve, to reach the key ms point of metal crystal phase transformation.

By changing the composition, changing the heat capacity of the solution is a method, which is simple and easy to control, but it is far from the accuracy of calculating the heat conversion method in advance according to the shape and size of the object and thermodynamic factors, and directly changing the initial temperature of the quenching solution!

Lin Tuo heated the water pot, cooled the oil pot, and from time to time read the temperature of the solution displayed by the bronze mirror from the hole in his sleeve.

At this time, Tong Xi was still working tirelessly, and in the blink of an eye, he was almost a hundred forging.

Quenching usually takes several hours, which cannot be changed by human beings.

After quenching, it has to be polished, according to the strength of the grinding stone and the strength of the workpiece, ranging from hours to days and months, everything must be calculated in advance, and the test is the level of the master

Tong Xi has a lot of strength and can reduce the polishing to an hour or even less, but Gu Xiaoyi can't, so Lin Tuo quenched first.

Old man Lu straightened up with his chair arm, and the others also held their breath, knowing that this was a crucial moment, the atmosphere in the hall suddenly became tense.

After two days of continuous watering, the sword blank in the furnace had been formed, Gu Xiaoyi held the red iron bar with iron tongs, and walked to the water pot tremblingly, looking at Lin Tuo's eyes full of hesitation.

Success or failure is at a certain moment in the next - the moment when you switch from the pot of water to the pot of oil.

However, the process starts from the second when the iron bar enters the water, and there is no turning back and cannot be reversed.

Two days of hard work, non-stop smoke and fire, patches of red skin, ripe and raw, raw and cooked, basins of cold water, poured on the body, poured down the throat, or directly transpired, or turned into sweat and then steamed, and in the past few years, I was ridiculed again and again, despised again and again, and the accumulated depression, depression, and struggle...... It's all in this three-foot-long bars of crimson iron.

really pinned too much hardship and blood and tears on Gu Xiaoyi, so that at the last moment, he actually suffered from gains and losses.

After a little hesitation, a thin layer of gray formed on the surface of the iron bar, and the color turned slightly darker.

Lin Tuo bent down to fill a handful of firewood and said, "What's the panic, there is me! Take it back and burn it again!"

At this moment, the best time has passed, and neither the iron temperature nor the oil temperature is the best state.

Therefore, this quenching is really complicated, even with modern industry, it is impossible to exhaust the limit.

Gu Xiaoyi's face was stunned, and he turned back to the smelting furnace with the ashes of the sword blank......

The audience sat down with a sigh of relief, this quenching was abrupt early, they were still a little uncomfortable, where did they understand that Lin Tuo was confident in the hardness of the steel body after quenching, and did not dare to leave too little time, lest Gu Xiaoyi would be in a hurry to polish it.

There are discussions, how to drip irrigation, only one side of the iron bar is dropped, and the other side, there has not been a drop of molten iron, how can it be possible to hit the sword with left and right symmetry?

Lin Tuo turned a deaf ear to this, and only used a bronze mirror to constantly read the temperature in the sword blank, water pot, and oil pot through the holes in his clothes.

In the blink of an eye, the temperature of the iron bar rose again, and the temperature in the pot also reached the expectation, Lin Tuo summoned Gu Xiaoyi and began the second quenching.

Gu Xiaoyi learned the lesson of the last time, and he didn't dare to delay a little, so he grabbed the sword blank with the tongs, trotted away, and invaded the pot.

"Whew!" As soon as the red iron bar entered the pot, the white mist steamed, the boiling bubbles surged, and the sound was amazing.

Lin Tuo looked at the iron bar at a glance, squinted at the copper mirror reading, and was unaware of the burning of his eyebrows by the steam, until the iron bar gradually cooled, and the red surface slowly turned black, and motioned Gu Xiaoyi to take out the sword blank and put it in the oil pot.

The temperature of the oil pan was low, and the sword blank was put into the pot, and there was another soft sound......

Just as everyone was holding their breath and focusing their attention between the two pots, the sound of the human body falling to the ground suddenly came.

Turning his head to look, it was Lu Zhenyuan, and somehow, he fell down.

In fact, it is not difficult to imagine that the iron-striking skills in the hall are the first in this way, and only he can see how accurate the timing of Lin Tuo's instantaneous two-liquid switch is, and how perfect the performance of the sword blank in the bath liquid is.

The disciples and grandchildren hurriedly went to help, but they were grabbed by Tong Xi!

"Come and help me, keep fighting, fight while it's hot, the victory or defeat is not yet known!" The old man weakly pushed Tong Xi away, trembling back into his seat, and reprimanded.

With a withered face and gray hair, he was originally in the prime of his forties and fifties, but at this moment, he looked like an old man in his sixties and seventies.

No, it's not just a moment of aging, he's been aging for the past two days, slowly, little by little......

I remember that on the first day, he was still full of energy, jumping up and down, and on the second day, he was lazy and almost immobile, so he said with his mouth, especially in the end, he actually let Tong Xi help him back to the room, and today, he couldn't even stand still......

In an instant, Lin Tuo's mind came up with the scenes of the past few days, all these anomalies were connected together, plus the psychological analysis of the old man's personality, and the abnormalities that he and Tong Xi showed at the same time......

Lin Tuo's body was shocked, and he suddenly understood, what was going on in front of him, and what kind of winner did Lu Zhenyuan use?

Is it worth it? As for it? Looking at the old man with complicated eyes, the fierce fighting intent and awe-inspiring disbelief in his heart melted like snow!

Everyone who is obsessed with forging is an angel with broken wings in his last life, and the guy who will use this means to win really can't afford to hurt!

This book was first published from 17k, the first time to see the genuine content!

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