The so-called quenching is a process when processing metal materials. Simply put, it means heating the metal workpiece to a certain appropriate temperature and maintaining it for a period of time, and then immersing it in the quenching medium to quickly cool it. After forging various iron tools in folk blacksmith shops, they need to
Reddened iron is quickly immersed in water to cool it, which is a form of quenching.
Processing processes such as quenching and tempering, annealing, and normalizing, collectively referred to as heat treatment processes, are important means for improving material properties. By accurately controlling the medium, temperature, time and other factors in the heat treatment process, the toughness and strength of the material can be improved.
, hardness, wear resistance, fatigue strength, etc. meet the specified requirements. The knowledge involved is unfathomable.
As a materials expert, Qin Hai has an in-depth understanding of heat treatment processes. He just took a look at the farm tools made by Fatty and knew that they had not been quenched. No. 65 manganese steel has excellent toughness and wear resistance.
It is a steel material, but if it is not quenched correctly after processing, the steel will become softer, resulting in the current curling phenomenon.
Fatty and the others were all apprentices with half a load of water, and they knew little about processing technology. Even when Qin Hai said the word "quenching", they couldn't react at once. The word "quenching" for quenching is according to the dictionary.
The explanation should be pronounced as "brittle", but in the heat treatment profession, people are accustomed to pronounce it as "war", which is derived from the traditional word "dipping in fire" in northern folk.
"You're talking about...brittle fire, right?" the short one among the three young men asked tentatively.
"Well, you can pronounce it this way." Qin Hai compromised. Now is not the time to popularize terminology, as long as the other party understands what he means.
"We... couldn't find water at the time." The short man replied in a barely audible voice. As an apprentice worker, he had never eaten pork and had seen pigs run away. He had seen the quenching process, but he didn't.
Know what it does. When making these farm tools, perhaps as he said, because there was no convenient cooling water nearby, this process was skipped.
"What? Your ironware is sold without even being quenched. This is not considered a shoddy product!" Several farmers finally understood and shouted together. Although they didn't understand industry, they had at least seen a blacksmith making iron.
, I know about quenching, and I also know that ironware that has not been quenched is not easy to use.
"return the goods!"
"Money back!"
"Make them pay!"
Several farmers shouted confidently, waiting for Qin Hai to seek justice for them.
"How is it? What do you think?" Qin Hai looked at the three young people and asked.
The fat man's tone was a little soft, and he muttered: "They just want to blackmail us. The steel we use is all good steel... Even if it is not quenched, the steel is always good steel... Such good steel is fifty cents cheaper than a blacksmith shop...
…”
He was talking to himself, but what he conveyed was very clear, that is, he was unwilling to return the money. Five farmers bought seven or eight pieces of farm equipment from them, worth more than ten yuan. If they returned all of them, they would probably
I really can’t take it out.
Qin Hai saw the fat man's dilemma, so he turned back and said to the farmers: "Uncles, can I propose a plan?"
"Go ahead." Several farmers said.
Qin Haidao: "Since you have bought these brothers' farm tools, they must be useful for your home. The steel used in these farm tools is indeed good steel, but there is just one less step in the processing. If you are willing, I will let you
These brothers put these farm tools back into the furnace and completed the quenching process. I guarantee that after the repairs are completed, the quality of these farm tools will be better than what you have used in the past. What do you think?"
"Hey, do you know what quenching is? We don't understand this." The fat man pulled Qin Hai's clothes from behind, fearing that Qin Hai's words would deceive them all.
Qin Hai glared at the fat man with a look that hated iron, and said: "Since I dare to agree, I am sure... However, you have to help me find a blacksmith shop and some quenching media. I will tell you later.
.”
During this time, the farmers had briefly exchanged opinions. They probably felt that there would be no results in entangled with Fatty and others, and they did need these farm tools, so they nodded and said to Qin Hai: "It depends on you
For the sake of this young man, as long as they can repair these farm tools and ensure that their blades are not curled, we will not return them."
"Who can guarantee not to curl the blade?" the tall young man said inappropriately, "You use a shovel as a masonry knife to split bricks, but you don't know how to curl the blade?"
"If the quenching is done well, the blade can indeed be curled." Qin Hai replied with a smile.
"Okay, I'm just talking about you, a young man. If you say that after quenching, this shovel won't be able to chop bricks, I will buy all the farm tools in this stall!" The leading farmer from before came up with a provocation.
In his heart, he also felt that Qin Hai's words were a bit exaggerated, but at this time, if he supported Qin Hai, he could force the three young people to have no way out. Of course, he would like to see this kind of thing.
"You said it yourself? Okay, buddy, tell me, how do we do quenching?" Fatty's passion was aroused by the farmer, and he suddenly had a desire, that is, he hoped that Qin Hai could really handle these farm tools.
If you can split bricks without curling the blade, you can use the farmer's words to force him to buy the remaining farm tools. This is not just a matter of how much money you can make, but how you can save the face you just lost.
Earn it back.
Qin Hai looked at both sides, shook his head helplessly, and then said to the three young people: "To do quenching, you must first have a furnace... Are you all from the factory? Should you go back to your factory or find a blacksmith shop?
, what do you think?"
"Let's find a blacksmith shop." The short man said. Selling farm tools to make money is their private job. It's best not to involve this kind of thing in the factory.
"Not far over there is Zhang Laosan's blacksmith shop. I know him well and can take you there." The leading farmer pointed in a direction and said.
"Okay." Qin Hai nodded and said to the young people: "There is another thing that you need to find. I need to prepare some quenching solution and use several chemicals. These chemicals may only be available in middle schools.
It can only be found in the laboratory, who of you has anything to do with it?"
"Me..." the short man raised his hand and replied, "my uncle is from the county..."
"Okay, the medicines I need are **, 亚**, and **. I will write down the names and quantities for you. You go to your uncle immediately, get these medicines, and send them to Zhang Laosan's blacksmith shop.
Go." Qin Hai took out a pen and paper from his bag, wrote a few names, and handed it to the short man.
Nowadays, several young people can only obey orders. They also hope that Qin Hai can create a miracle for them and reverse their passivity. The short man took the note handed by Qin Hai and spread two
With short legs, he ran towards the county.
After sending away the short man, Qin Hai said hello, and the remaining people held the farm tools on the stall. Under the leadership of the leading farmer, they came to a blacksmith shop located in a group of bungalows. Outside the door of the blacksmith shop, they hung
A sign with the words "Zhang Laosan" written on it.
"Third brother, I have something to disturb you," the leading farmer shouted.
"Mangu, what are you here to buy again?... Well, why are there so many people?" Zhang Laosan came out of the house to greet him and saw so many people standing outside the door, and each of them was holding some farm tools in their hands.
I couldn't help but be stunned for a moment.
The farmer named Mangu stepped forward and told what happened in a few words. Zhang Laosan took the curled-edged shovel from Mangu's hand, looked at the blade, and said, "Well, it's indeed a good piece of shovel."
Steel, it's a pity...but even if it is tempered with a fire, it can be used to split bricks, which is bragging."
"Master Zhang, are you bragging? Can you let me try it first? With such good steel, if it is quenched well, there should be no problem in splitting ordinary red bricks." Qin Hai stepped forward and said.
Zhang Laosan looked Qin Hai up and down and said, "Are you the young man who knows how to temper? Where did you learn it?"
Qin Haidao: "I graduated from the Provincial Agricultural Machinery Technical School and learned a little bit about quenching in school."
"Haha." Zhang Laosan laughed, "I learned it in school, okay, okay, newborn calves are not afraid of tigers. I have a complete stove, anvil, and water here. Just show your skills and open the eyes of an old blacksmith like me."
.”
His words were full of disdain, but his attitude was still enthusiastic. Quenching is not difficult, but easy. The easy part is that it is nothing more than heating and then soaking in water. It is difficult to say that it is heated.
There are some ways to determine the heat, and the quality of the quenching effect is reflected in the operator's judgment of the heat.
From Zhang Laosan's point of view, Qin Hai is probably an ignorant student who has learned a little bit in school and wants to show off. He believes that Qin Hai can definitely do quenching, but the quenching effect is compared to that of an old blacksmith like him.
, it is estimated that there will be a big difference. He himself cannot process these farm tools to the extent that they can split bricks. It is just a joke for Qin Hai to achieve this effect.
Qin Hai knew that his age was a flaw. If he wanted others to think highly of him, he could only produce excellent results. He thanked Zhang Laosan and then walked into the blacksmith shop with the dismantled shovel head.