Chapter 2: Teach you what is quenching

The so-called quenching is a process when metal materials are processed. Simply put, the metal workpiece is heated to a suitable temperature and maintained for a period of time, and then immersed in a quenching medium to cool quickly. After the folk smithy forges all kinds of ironware, the red ironware must be quickly immersed in water for cooling. This is a way of quenching.
Quenching and tempering, annealing, normalizing and other processing processes, collectively referred to as heat treatment processes, are important means for improving material properties. By precisely controlling the medium, temperature, time and other factors in the heat treatment process, the toughness, strength, hardness, wear resistance, fatigue strength, etc. of the material can reach the specified requirements. The knowledge of this is unfathomable.
As a materials expert, Qin Hai has an in-depth understanding of heat treatment processes. He just glanced at the farm tools they made, and knew that it was not quenched. No. 65 manganese steel is a steel with excellent toughness and wear resistance. However, if it is not properly quenched after processing, the steel will be softened, and this phenomenon of curling will occur.
These fat apprentices are half-carrying apprentices. They have little knowledge of processing problems, and even Qin Hai said the word "quenching" could not immediately respond. The word "quenched" in quenching should be pronounced as "crisp" according to the dictionary. However, in the field of heat treatment, people are accustomed to pronounce the word "battle". This is the traditional "dip fire" from the northern folk tradition. This word is extended.
"You said ... is it brittle, right?" The short one of the three young men asked tentatively.
"Well, you can read it like this." Qin Hai compromised, and now is not the time to popularize the term, as long as the other party understands what they mean.
我们 "We were ... we couldn't find water at that time," the short man replied in an obscure voice. As an apprentice, he has n’t eaten pork and has seen pigs run. He has seen the process of quenching, but I do n’t know what it does. When making these agricultural tools, as he said, because there is no convenient cooling water nearby, this process was skipped.
"What? Your ironware was sold without hardening, and this is not considered a shoddy product!" Several peasants bewildered and shouted together. Although they do not understand industry, they have at least seen blacksmiths working on iron, knowing about hardening, and know that unhardened iron is not easy to use.
"Return!"
"Refund!"
让 "Let them lose money!"
A few farmers shouted rightfully, waiting for Qin Hai to speak up for them.
怎么 样 "How is it, how do you guys feel?" 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, we use good steel ... even without hardening, steel is always good steel ... Such a good steel is cheaper than the smithy ... ... "
He said to himself, but the meaning revealed was very clear, that is, unwillingness to refund money. The five farmers bought from them had seven or eight farms worth a dozen dollars, and if all were returned, it is estimated that they could not really get them.
Qi Qinhai saw the embarrassment of the fat man, and he turned back and said to the farmers, "Uncles, can I suggest a plan?"
"You say it." Several farmers said.
Qin Haidao: "Since you bought the agricultural tools of these brothers, they must be available at home. The steel used for these agricultural tools is really good steel, but there is only one process when processing. If you want, I let These brothers returned the farm tools to the oven and added the quenching process. I guarantee that after the repair, the quality of these farm tools is 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 shirt behind his back, for fear that Qin Hai's words would pit them all.
Qin Hai stared at the fat man with a hate for iron and steel, and said, "Since I dare to promise, I'm sure ... but you have to help me find an smithy and some quenching medium. I will tell you later . "
This time, the farmers have simply exchanged opinions, and probably feel that there is no result in entanglement with fat people and others, and they really need these agricultural tools, so nodded and said to Qin Hai: "Look at you In this young face, as long as they can repair these farm tools and guarantee that they will not be rolled, we will not return them. "
"Who dare not guarantee that the blade will not be rolled!" The tall young man said inappropriately, "If you use a as a tile knife to split a brick, you will not curl it?"
"If quenching is done well, it really can't be rolled." Qin Hai answered with a smile.
"Well, if you say to this young man, if you say that this shovel will not cut the blade after the brick is quenched, I have bought all the farm tools on this stall!" In his heart, Qin Hai's words were a bit exaggerated, but at this time he stood up to Qin Hai and was able to drive the three young people out of nowhere. Of course, he was happy to hear such things.
"What did you say? Okay, buddy, let's say, how do we quench?" The fat man's blood was stirred up by the farmer, and he suddenly developed a desire that Qin Hai could really handle these farm tools. The point of slicing a brick without curling it, so that he can use the farmer's words to force him to buy the remaining farm tools. This is not only a matter of how much money he can earn, but also the face he has just lost. Earn back.
Qin Hai looked at the two sides, shook his head helplessly, and then said to the three young people: "To be quenched, you must first have a stove ... Are you all from the factory? Are you going back to your factory or looking for an smithy? What do you say? "
找 "Let's find a smithy," said the short man. It is their personal work to sell farm implements to earn money. It is better not to get involved in the factory.
"Not far away is the blacksmith's shop of Zhang Laosan. I know him and can take you there." The leading farmer pointed in a direction and said.
"That's good." Qin Hai nodded, and said to the young people, "There is one more thing that you need to look for. I need to prepare some quenching solution and use several chemicals. These drugs may only be available in middle school. It can only be found in the laboratory, who has a relationship with you? "
"Let's ..." The short man raised his hand and replied, "I'm from the county ..."
"Okay, the medicines I need are, Ya, and I will write down the name and quantity. You will go to you immediately, get these medicines, and take them to the blacksmith's shop in Zhang Laosan." Qin Haicong Take the pen and paper out of the shoulder bag, write a few names, and hand it to the short man.
Nowadays, a few young people can only obey, and they also hope that Qin Hai can create a miracle for them and reverse the passive. The short man took the note from Qin Hai, spread his two short legs, and ran in the direction of the county.
The short man was sent away, and Qin Hai greeted him. The rest held the farm tools on the stall, and led by the leading farmer, came to a blacksmith shop in a bungalow, and hung outside the door of the blacksmith shop. A sign with the words "Zhang Lao San" on it.
"Boss, I have something to disturb you," the lead farmer shouted.
"It's pretty ugly, what did you buy again? ... Um, why are there so many people?" Zhang Laosan greeted from the house and saw so many people standing outside the door, and each person also held some farm tools. Can't help it a bit.
The peasant, who was very stubborn, went forward and said the matter in a few words. Zhang Laosan took the shovel with a rolled blade in his hand, looked at the blade, and said, "Oh, UU Kanshu www.uukanshu.com is indeed a good piece of steel, but unfortunately ... Fire can be used to cut bricks. "
"Master Zhang, is it bragging, can you let me try it first. If such a good steel is well quenched and hardened, there should be no problem splitting ordinary red bricks." Qin Haiqian said.
Zhang Zhang looked at Qin Hai up and down and said, "You are the epigenetic who understands hardening? Where did you learn?"
Qin Haidao: "I graduated from the Provincial Agricultural Machinery Technical School and learned a little hardening in the school."
"Haha." Zhang Zhang smiled. "School learned, okay, the new born calves are not afraid of tigers. I have all the stoves, anvils and water here, so you can show my old blacksmith to open your eyes. . "
His words are full of disdain, but his attitude is rather enthusiastic. Quenching such things is not difficult to say, and it is not easy to say. The easy part is that it is nothing more than heating and then soaking in water. It is difficult to say that it is because there is some doorway in the heat and the quality of the quenching effect is reflected in the judgment of the operator on the heat.
From the perspective of Mr. Zhang, Qin Hai is probably a student who knows nothing about heights and heights. After learning a little fur in school, he thought of it. He believes that Qin Hai will definitely quench, but the effect of quenching is estimated to be a lot worse than that of his old blacksmith. He couldn't handle the farm tools to the extent that he could split bricks. Qin Hai's achievement of this effect was just a joke.
Qin Hai knows that his age is flawed. To count on others to look down on himself, he can only produce excellent results. He thanked Mr. Zhang and walked into the smithy with the shovel head removed.