Han Chunlin had the system.
As for experience, before he transmigrated, he often soaked in the factory and hung out with those masters. Over time, he had learned all kinds of experience and even used it to select materials.
The factories in the 1970s were still very backward, and most of the processes were still completed by manpower.
Master Zhao specially asked someone to give him a small furnace. Han Chunlin did not stand on ceremony. He picked up a pair of fire tongs, placed the hoe into the center of the furnace, and began roasting.
"Chunlin, do you really know how to do that, tempering?”More and more people gathered to watch. Tao Zishen was afraid that Han Chunlin would be humiliated if he couldn't do it.
If it really didn't work, it was still not too late to run now. At most, he would just lose his job.
"Cut the crap. Don't you trust your brother?”Han Chunlin glared at him and turned to look at Master Zhao." Do you know how to forge, Master Zhao?"”
Since you can't get along with me, I'll torture you.
He wasn't Han Chunming. He didn't have a good temper.
Master Zhao wasn't fat, but the flesh on his cheeks still trembled. He knew that Han Chunlin was deliberately taking the opportunity to order him around, but he couldn't refuse.
With so many people surrounding them, including the purchasing director from the agricultural machinery factory, it was a chance to show his face.
Moreover, he didn't dare to deliberately play tricks. There were so many people watching. If he didn't play well, he would be the one to lose face. It had nothing to do with Han Chunlin.
'If you don't do it well later, I'll tear you apart.'Master Zhao gritted his teeth and finally stepped forward obediently to take over the forging work.
The farm tools that were sent back were basically all rolled blades. If they were not reforged into sharp blades, they would not be able to be used.
Han Chunming heated the hoe to a suitable temperature, then took it out with a pair of tongs and placed it on the anvil.
Putting aside the fact that Master Zhao's quenching technique was useless, his forging technique was still quite impressive.
Thinking about it, this guy must have climbed up step by step as a blacksmith in the factory.
Tempering was easier than forging, and the salary was higher. Those who had the ability would choose to be a tempering master instead of a blacksmith.
Master Zhao's heavy hammer was danced around by him.
It was easy to repair the curved blade. It was done in a few moves.
"Alright, hurry up and start your tempering.”Master Zhao was very satisfied with his forging skills, but he still impatiently threw away the hammer in his hand and pointed at the pool beside him.
"Is this how you guys quench it?" Han Chunlin was shocked.
F * ck!
The skills passed down by their ancestors were actually wasted like this. No wonder they could not make good farming tools.
Master Zhao thought that Han Chunlin didn't know how to do it at all and was still finding excuses for himself. He couldn't help but say angrily,"Can you do it or not?"
"Shut up and learn." Not only did Han Chunlin not start the quenching work, but he also returned the hoe that had just been forged to the furnace and reheated it.
This step was also known as the fire.
"You... Pretentious." Master Zhao's face turned green and white. He wanted to go up and chew Han Chunlin into pieces.
The quenching process was different from before, and it made Director Liu curious.
"Little Master, why do you want to burn it again? Do you think that Master Zhao's forging is not up to standard?”
Everyone stared at Han Chunlin, wanting to hear what he had to say.
Everyone could see that there was no problem with the forging just now. Many people in Zhengyang Metal Factory could not do it to this extent.
Han Chunlin stared at the fire and said without looking back,"Heat treatment is not as simple as you think. First of all, the metal has to be heated to Ac3, which is the temperature at which the free Ferrite completely transforms into Austenite, thereby producing solid solution strengthening.”
" Then, it can be taken out and cooled naturally in the air. It can eliminate the reticulated crystallizer of eutectoid steel and refine the crystal lattice of hypoeutectoid steel…"
Everyone present was shocked!
They had no idea what the heat treatment was about.
Director Liu bumped into Master Zhao and asked in a low voice,"Master Zhao, what's the point of the troublesome heat treatment step? Can you explain it to me?”
"What's the point? A young kid who has read a few books really thinks that he can play around.”Master Zhao was embarrassed. He couldn't understand it at all.
At this moment, the person who was called by Director Liu to look for chemicals returned with a few glass bottles in his hand.
"Damn, so many people? Am I late?" That person was a little careful and did not dare to get too close.
"No, you came just in time." Han Chunlin buried the hoe into the coal ash to maintain its current temperature.
Then, he took the chemical agent that the man had brought back and mixed it with 25%, 20%, 20%, and 35% of the mixture.
This was the experience he had learned, and also the true skill.
"What's going on?" Master Zhao frowned.”
Han Chunlin smiled and didn't explain. He just turned around and took out the hoe with the right temperature and stuffed it into the quenching solution.
"Zi!"
With a crisp sound, hot air with the strange smell of metal rushed out. The whole process lasted for two to three minutes until the hoe cooled down.
Just when everyone thought that it was done, Han Chunlin threw his head back into the furnace.
This step was also called tempering.
The purpose was to eliminate the internal stress caused by quenching and reduce the hardness and brittleness of the metal to achieve the expected mechanical properties.
"Kid, are you playing tricks?" Master Zhao couldn't wait any longer because the more complicated and indifferent Han Chunlin was, the more uneasy he felt.
However, Han Chunlin did not care about him at all. After heating the hoe to a satisfactory temperature, he stuffed it into the coal ash that had no residual temperature at all to cool it down.
"Alright, let's try." The hoe that had finished its cooldown was thrown in front of everyone.
"Can you really split a brick like this?" Li Chunyang asked in disbelief.
"Go ahead and let everyone see what true quenching technology looks like. Tao Zi, you do it.”Han Chunlin made a solemn vow, and the people present did not say anything else.
Tao Zi gritted his teeth, took the hoe, and hacked at the red brick on the ground.
Bang!
The crisp sound of metal made everyone except Han Chunlin gasp. They thought that even if the blade did not curl, there would at least be a hole.
Master Zhao had a smug smile on his face.
However, when he saw the edge of the hoe clearly, he could not help but freeze.
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