The so-called quenching is a process in the processing of metal materials. To put it simply, the metal workpiece is heated to an appropriate temperature and held for a period of time, and then immersed in a quenching medium for rapid cooling. After forging various irons, the reddened irons are quickly immersed in water for cooling, which is a method of quenching.

Quenching and tempering, annealing, normalizing and other processing processes, collectively known as heat treatment processes, are important means used to improve the properties of materials. By accurately controlling the medium, temperature, time and other factors in the heat treatment process, the toughness, strength, hardness, wear resistance, fatigue strength and other factors of the material can meet the specified requirements, which can be described as unfathomable.

As a materials expert, Qin Hai has an in-depth understanding of heat treatment processes. He just glanced at the farm tools made by the fat man, and knew that they had not been quenched. No. 65 manganese steel is a steel with excellent toughness and wear resistance, but if it is not properly quenched after machining, the steel will become soft, resulting in the current curling phenomenon.

The fat man and several of them are apprentices with half a load of water, and they don't know much about the problems in processing technology, and even the word "quenching" that Qin Hai said, they can't react at once. According to the dictionary explanation, the word "quenching" should be pronounced "brittle", but in the heat treatment profession, people are accustomed to pronouncing the sound of "war", which is derived from the word "dipping fire" in the traditional folk of the north.

"What do you mean...... It's crispy fire, right? The short of the three young men asked tentatively.

"Well, you can pronounce it like that." Qin Hai compromised, now is not the time to popularize the terminology, as long as the other party understands what he means.

"We were ...... No water can be found. The short man replied in an inaudible voice. As an apprentice, he has never eaten pork and has seen pigs run, and he has seen the process of quenching, but he doesn't know what the role of the road is. When making these farm tools, perhaps as he said, because there is no convenient cooling water nearby, this process is skipped.

"What? Your iron tools were sold without even quenching, and this is not considered a shoddy commodity! Several peasants were taken care of and shouted in unison. Although they don't understand industry, they have at least seen blacksmiths striking iron, and they know that there is such a thing as quenching in Ludao, and they also know that ironware that has not been quenched in Ludao is not easy to use.

"Return!"

"Refund the money!"

"Let them lose money!"

Several peasants shouted confidently, waiting for Qin Hai to speak for them for justice.

"Well, what do you guys think?" Qin Hai looked at the three young men and asked.

The fat man's tone was a little soft, and he muttered, "They just want to blackmail us, and we use good steel...... Even if there is no quenching, steel is always good steel...... Such a good steel is five cents cheaper than a blacksmith shop......"

He said to himself, but the meaning revealed was very clear, that is, he was unwilling to return the money. The five peasants bought seven or eight pieces of farm furniture from them, worth more than a dozen yuan, and if they returned all of them, it is estimated that they would not be able to take them out.

Qin Hai saw the fat man's embarrassment, he turned his head again, and said to the peasants: "Uncles, shall I propose a plan?" ”

"Say it." A few peasants said.

Qin Haidao: "Since you have bought the farm tools of these brothers, they must be able to use them at home." The steel used in these agricultural tools is indeed good steel, but there is one less process in the processing. If you wish, I will ask these brothers to return these farming tools to the furnace and complete the quenching process. I promise that after the restoration, the quality of these farming tools will be better than all the ones you have used in the past, what do you think? ”

"Hey, do you know what quenching is? We don't understand that. The fat man pulled Qin Hai's shirt behind his back, for fear that Qin Hai's words would trap them.

Qin Hai glared at the fat man with a gaze that hated iron and steel, and said, "Since I dare to agree, I am naturally sure...... You'll have to help me find a blacksmith shop, though, and some quenching media, I'll tell you later. ”

This time, those farmers have simply exchanged opinions, probably because they feel that it is useless to entangle with the fat man and others, and they really need these farm tools, so they nodded and said to Qin Hai: "For the sake of your young face, as long as they can repair these farm tools and ensure that they do not roll the blade, we will not return them." ”

"Who dares to guarantee not to curl the blade!" The tall young man came out of place, "You use a shovel as a brick knife to chop bricks, and you don't know how to curl the blade?" ”

"If the quenching is done well, it is true that the blade can not be curled." Qin Hai replied with a smile.

"Okay, just at you, a young man, if you say that this shovel won't roll the blade of bricks after quenching, I will buy all the farm tools in this stall!" The previous leading peasant came to a radical method, and in his heart, he also felt that Qin Hai's words were a bit exaggerated, but at this time, if he stood up for Qin Hai, he could force the three young people to have no way out, such a thing, of course, he liked to hear about it.

"You said it yourself? Okay, buddy, you say, how do we do quenching? The fat man's enthusiasm was aroused by the farmer, and he suddenly had a wish, that is, he hoped that Qin Hai could really deal with these farm tools to the point of splitting bricks without curling the blade, so that he could use the farmer's words to force him to buy the rest of the farm tools, which was not just a matter of how much money he could make, but to be able to earn back all the face he had just lost.

Qin Hai looked at the two sides, shook his head helplessly, and then said to the three young people: "To quench, you must first have a furnace...... You're all from the factory, right? Do you want to go back to your factory, or find a blacksmith shop, you say? ”

"Find a blacksmith." The short man said. It is their private work to sell farm tools to make money, and this kind of thing should not be involved in the factory.

"Not far from that side is Zhang Laosan's blacksmith shop, I know him well, I can take you there." The farmer in the lead pointed in one direction and said.

"That's good." Qin Hai nodded, and said to the young people, "There is one more thing that you need to find." I need to prepare some quenching solution, and I need to use several chemicals, which may only be found in the middle school laboratory, which of you is related? ”

"I'......" replied the short man with his hand raised, "my uncle is the ...... of the county."

"Okay, the medicines I need are **, Ya**, and**, I'll write down the name and quantity for you, you go to your uncle immediately, get these medicines, and send them to Zhang Laosan's blacksmith shop." Qin Hai took out a pen and paper from his satchel, wrote a few names, and handed them to the short man.

Now, a few young people can only obey their orders, and 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, spread his two short legs, and ran in the direction of the county.

Sent away the short man, Qin Hai greeted, and the rest of the people held the farm tools on the stall, and under the leadership of the leading farmer, they came to a blacksmith shop located in a bungalow, and outside the door of the blacksmith shop, a sign was hung on it, which really said "Zhang Laosan".

"Third child, I have something to disturb you." The leading peasant shouted.

"What are you buying again? …… Well, how are there so many people? Zhang Laosan came out of the house and saw so many people standing outside the door, and each of them was holding some farm tools in their hands, and he couldn't help but be stunned for a moment.

The peasant, who was called the man, stepped forward and told the story of the incident in a few words. Zhang Laosan took the shovel with the blade rolled in his hand, looked at the blade, and said, "Well, it's indeed a good piece of steel, but it's a pity...... However, even if you quench another fire, it is bragging that it can be used to split bricks. ”

"Master Zhang, are you bragging, can you let me try it first. With such a good steel, if it is quenched and quenched well, it should be no problem to split ordinary red bricks. Qin Haihai said.

Zhang Laosan glanced Qin Hai up and down, and said, "You are the descendant who knows how to quench?" Where did you learn? ”

Qin Haidao: "I graduated from the Provincial Agricultural Machinery Technical School, and I learned a little quenching in school. ”

"Ha Lu Ha." Zhang Laosan laughed, "I learned it in school, yes, yes, newborn calves are not afraid of tigers, I have a complete stove, anvil, and water here, so you can show my hand and let me, an old blacksmith, open my eyes." ”

His words were full of disdain, but his attitude was warm. Quenching is not difficult to say, but it is not easy to say. The ease lies in the fact that it is nothing more than heating and then soaking in water. It is difficult to say that there are some doorways for the heating heat, and the quality of the quenching effect is reflected in the operator's judgment of the heat.

In Zhang Laosan's opinion, Qin Hai is estimated to be a student who doesn't know the height of the sky, and after learning a little bit in school, he wants to show off. He believed that Qin Hai would definitely do quenching, but the effect of quenching was estimated to be much worse than that of him, an old blacksmith. He couldn't handle these farm tools to the point where he could split bricks, and Qin Hai wanted to achieve this effect, it was just a joke.

Qin Haizhi said that his age was a hard injury, and if he wanted others to look up to him, he could only come up with excellent results. He thanked Zhang Laosan, and then walked into the blacksmith shop with the dismantled shovel.