"Let him come in!"

After saying that, Zhang Xiu took on his sore body and started to do it. He glanced at the old blacksmith and couldn't help but say, "What's wrong? Is there anything wrong so late?"

"Lord, you are a wealthy person, and you will definitely not be able to do these rough work. This is the ointment heirloom of the family, which can relieve soreness and swelling and eliminate fatigue in one night."

Although the old blacksmith is in his fifties, he is energetic and has bright eyes.

"I'm sorry!" Zhang Xiu took over and said gently.

"The lord has a strong saying, and the lord serves the country and the people. Everyone in the world knows that we can serve the lord, which is the glory of our ancestors and we have the honor of our three lives."

The old blacksmith said this, but it was a resounding sound.

Not only him, but also in the eyes of everyone in Jingzhou, it is an honor to serve Zhang Xiu, let alone talk to Zhang Xiu.

"Yeah, by the way, you can take a look at some things." After Zhang Xiu said that, he handed over the straw paper before, which contained various parts.

It is too easy to place these parts in the future, but at this time, it is difficult to start.

The old blacksmith took it and looked at it, but it showed bitterness. It was a powerless expression, such as the screw and nut.

The fineness is too high, and it is difficult to make it out with a mold.

"Lord, these things are small, but they are not easy to build, and my subordinates can do nothing." The old blacksmith shook his head and said.

Zhang Xiu was not surprised, he had to conquer it step by step.

"However, the drawings of this steel ball were found when the lord built a four-wheeler, and the blacksmith camp could not make it."

"But after thinking about it, it is not impossible to create this kind of steel bead. I found a round bead and made a mold. It should be ready."

"Just think of a way to pressurize the steel into the mold at that time, you should get the steel beads."

The old blacksmith said with his own ideas.

"Do you have a mold? Take me over and take a look!" Zhang Xiu was a little excited, dragging his tired body out.

In this case, the accuracy of creating steel beads is definitely not as high as that of later generations, but fortunately, the requirements for steel beads are not as high as those of later generations.

If it can be built, it will at least allow the industry to develop faster and all kinds of bearing rotation devices can be improved.

The old blacksmith did not dare to disobey and hurriedly followed him out.

......

For a moment, in the stove room.

The old blacksmith had a high prestige and said in a deep voice: "Xiao Li, is the steel ball mold ready?"

"Master, it's already formed and should be ready to use it, but I haven't tried it yet. I don't know if it's OK!" The apprentice replied.

After saying that, he took out a pair of steel blocks.

And in the middle of this pair of steel blocks is a circular hole.

"Are there any burned molten steel? Prepare to fill the molten steel." The old blacksmith was serious and very solemn.

"Yes, the disciple is ready now."

As he said that, he started to work hard with his people.

During the whole process, Zhang Xiu was blinded. He was an amateur and was not qualified to say anything more.

After a while, the mold opened and a fiery red steel ball fell in front of Zhang Xiu. Because of peroxide, it showed that there was an increase of black substance.

"Hurry up, get back on fire!" said the old blacksmith.

Re-tempering, things passed down from generation to generation, can increase the toughness of weapons.

Zhang Xiu frowned slightly. Although he couldn't remember the professional term for backfire, he should first quench it and then backfire it.

Quenching means that the thing is heated from a new temperature to a critical temperature, and then taken out and cooled quickly, usually water-cooled.

In this way, the hardness of the steel can be increased.

However, this will also become more brittle, so it needs to be tempered here to increase the toughness of the steel.

Zhang Xiu didn't say anything, and it wouldn't be too late to point it out after experimenting in the future. The most important thing at the moment is steel balls.

After a while, the temperature of the steel ball dropped.

It looks different from the steel pearls in later generations, and this thing looks a bit dim and gray.

"Lord, look, is this okay?" The old blacksmith was wrapped in something, afraid of burning Zhang Xiu, so he tentatively handed it over and asked.

"The surface is a bit rough and may need to be polished to reduce the friction." Zhang Xiu pinched it and looked at it, and said in a deep voice.

This is too rough. The purpose of steel balls is to increase rolling friction and reduce friction. If they are so rough, the effect will not be very good.

"This is not difficult, Xiao Li, immediately take someone to polish the steel balls, but it is necessary to reduce the loss." The old blacksmith said instructing him.

"Good!"

"Don't be so anxious. Get a few more first. Then polish one piece, and I'll try the bearing." Zhang Xiu said with some heat in his eyes.

Although the accuracy may be a little worse, it should be fine in this era. If you make the bearings out, many things can be made.

"Yeah!" Xiao Li responded.

Immediately, everyone witnessed the release of steel balls and returned to tempering under the fire. Later, Zhang Xiu asked to quench it first.

However, quenching requires controlling the fire temperature, and this process took a long time.

After a long time, after all the polishes were polished, Zhang Xiu took the two large and small rings prepared before, put a handful of steel balls in, and then turned them, and laughed.

It can be rotated, although it cannot reach the point where it can be turned countless times in the future, but in this way, it can save a lot of friction loss.

And this trick ended in the middle of the night.

Before going back to the room to go to bed, Zhang Xiu was still happy, but after a while, he snored like thunder. That was tired, and he was so tired.
Chapter completed!